Article
Chemistry, Physical
Yongdong Yu, Yongting Zheng, Xudong Liu, Yuchen Yuan, Wanjun Yu, Xiaodong He
Summary: The YSZ/Al2O3 supersaturated solid solution micro-powders (YAP) were obtained through combustion synthesis assisted rapid water cooling, consisting of metastable phases and nano-scale microstructures. The composition of YAP remained stable at temperatures <= 1200 K, but the appearance of alpha-Al2O3 phase and changes in grain size were observed at higher temperatures. The in-situ nanoprecipitation on YAP-1700 resulted in the disappearance of interfaces between YAP, allowing for the achievement of intracrystalline-intercrystalline nanocomposite ceramics.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Youngchan Kim, Jaemook Lim, Ji Hwan Lim, Eunseung Hwang, Hyunkoo Lee, Minwoo Kim, Inho Ha, Hyunmin Cho, Jinhyeong Kwon, Junho Oh, Seung Hwan Ko, Heng Pan, Sukjoon Hong
Summary: A supersaturated solution-based physical unclonable function (S-PUF) is proposed, which generates multilevel cryptographic keys and enables a faster authentication process by controlling temperature distribution and crystal size. Additionally, the cryptographic keys can be repeatedly reconfigured, offering new possibilities for a recyclable anti-counterfeiting platform.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Keisuke Ueda, Neo Yamamoto, Kenjirou Higashi, Kunikazu Moribe
Summary: This study characterized the molecular states of supersaturated drugs and crystallization inhibitors using NMR, revealing the inhibition mechanism of drug crystal nucleation in drug-supersaturated solutions. It was found that PVP effectively inhibited CLT crystallization and maintained CLT in a supersaturated state by interacting with CLT through hydrophobic interactions. The study demonstrated the importance of the molecular weight of crystallization inhibitors on their ability to suppress the molecular mobility of self-associated drugs and inhibit nucleation.
CRYSTAL GROWTH & DESIGN
(2022)
Article
Chemistry, Physical
Keyao Li, Sokhibjon Turdalievich Matkarimov, Wei Xiao, Cheng Liu, Siyuan Yang
Summary: In this study, interfacial microbubbles were created in an air supersaturated solution using a sudden drop of ambient pressure. The growth process of interfacial microbubbles was studied under different influential parameters, and it was found that it goes through three stages: floating stage, transition stage, and expansion stage. The experimental results showed that the magnitude of pressure drop, surface wettability, surface roughness, dissolved air content, and solution surface tension significantly affect the nucleation and growth of interfacial microbubbles. Additionally, a modified diffusion theoretical model successfully predicted the changes in contact angle and bubble radius during the growth process.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Environmental Sciences
Yan Shi, Zheng Chen, Keliang Zhu, Jiajun Fan, James H. Clark, Gang Luo, Shicheng Zhang
Summary: This study investigates the migration and transformation of phosphorus during the microwave hydrothermal process of sewage sludge. It is found that there are no significant differences in phosphorus distribution and speciation changes between different heating types, especially at high hydrothermal temperatures. Ortho-P/Pyro-P is the dominant form of phosphorus in the hydrothermal solid products, and high temperature promotes the transformation of C-O-P to Ortho-P/Pyro-P. The results also show that moderate microwave hydrothermal temperature and holding time promote the transformation of phosphorus to liquid products.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Energy & Fuels
Yanhong Wang, Lijiao Fan, Liqun Xiao, Lulu Wang, Dongsheng Shen, Yuyang Long
Summary: This study investigated the reactive adsorption process of fructose dehydration to 5-hydroxymethylfurfural (HMF) catalyzed by hydrochloric acid under microwave conditions. BP2000 showed higher adsorption capacity than activated carbon (AC) and its addition increased the yield of HMF. By adding 39 g L-1 BP2000 and reacting for 4 min at 160 degrees C under microwave hydrothermal conditions, the maximum theoretical yield of HMF reached 65%. Microwave hydrothermal technology (MHT) significantly improved efficiency and reduced reaction time. Reactive adsorption effectively buffered HMF from side reactions, enhancing its yield and providing a more sustainable method for production and separation.
Article
Agronomy
Kang Kang, Tianle Zhang, Guotao Sun, Mingqiang Zhu, Kankan Li, Dongbing Li
Summary: The study found that valorization of fallen leaves from landscape trees through the MHC process can yield higher hydrochar production and lower energy consumption, while more effectively removing potassium and silicon. In thermal degradation kinetics analysis, the FWO method was found to be more suitable for the sample compared to the KAS method. The hydrochar obtained from the MHC process showed lower average activation energy, indicating greater potential for valorization.
GLOBAL CHANGE BIOLOGY BIOENERGY
(2021)
Article
Materials Science, Ceramics
Wenyan Huang, Sridhar Komarneni, Young Dong Noh, Kunfeng Chen, Dongfeng Xue, Hiroaki Katsuki, Jianfeng Ma, Xiaoqiang Xue, Hongjun Yang
Summary: Microwave-hydrothermal synthesis of α-Sn(HPO4)2•H2O (α-SnP) was achieved in as low as 5 minutes at 194 ℃, greatly reducing the reaction time compared to previous methods. The super fast synthesis was attributed to localized superheating, where nucleation and reactions occurred rapidly. Characterization using various microscopy techniques revealed different morphologies of α-SnP under varying conditions.
CERAMICS INTERNATIONAL
(2021)
Article
Mechanics
Hannah M. Hartge, Eckhard Floeter, Thomas A. Vilgis
Summary: This study investigates supersaturated sucrose-water solutions under agitation, different temperatures, and concentrations as simplified fondant model systems. The torque curves during constant kneading show characteristic changes related to the interplay of changes in concentration, formation of conglomerates, and breaking of particles. Comparing the crystallization times with induction time models, it is found that the variations are related to temperature and supersaturation in a similar way.
Article
Materials Science, Multidisciplinary
F. A. C. Nobrega, R. F. Abreu, D. da M. Colares, M. A. S. Silva, F. F. do Carmo, T. O. Abreu, J. P. C. do Nascimento, J. C. Sales, R. S. Silva, J. C. Goes, A. S. B. Sombra
Summary: This study focuses on the dielectric properties of BaMoO4 ceramic and BaMoO4-CTO composites in the microwave region. The addition of 20% CTO to BaMoO4 resulted in a composite with desirable relative dielectric permittivity and low dielectric loss. These materials can be used as dielectric resonator antennas.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Pharmacology & Pharmacy
Tobias Palle Holm, Matthias Manne Knopp, Ragna Berthelsen, Korbinian Lobmann
Summary: This study successfully prepared highly supersaturated amorphous solid dispersions using in situ amorphisation with microwave irradiation. However, the lower drug release rate observed in the experiment may be attributed to the fusion of drug and polymer particles during microwave irradiation, leading to limited disintegration of the resulting monolithic ASDs.
INTERNATIONAL JOURNAL OF PHARMACEUTICS
(2022)
Article
Chemistry, Physical
Zuowei Liu, Zhipeng Xu, Xueyi Guo, Qinghua Tian
Summary: This study presents a model to accurately measure the partial current of GER during gallium electrodeposition by separating it from the HER. The results show that the measured current efficiency is in agreement with the fitted value, indicating the reliability of the model. Comparison with the Scharifker-Hills model reveals the nucleation mechanism of GER transitioning from instantaneous to progressive nucleation as the potential increases, which is further confirmed by microscopic morphology at different electrodeposition times. Overall, this study offers a promising solution for accurately measuring the partial current of GER during gallium electrodeposition.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Review
Materials Science, Multidisciplinary
Hongsen Niu, Ning Li, Eun-Seoung Kim, Young Kee Shin, Nam-Young Kim, Guozhen Shen, Yang Li
Summary: This article discusses the importance and potential applications of hierarchical structural materials in intelligent applications, and explores the advantages and challenges of advanced solution synthesis methods in the fabrication of tactile sensors.
Article
Materials Science, Multidisciplinary
Yiming Zhong, Bo Zhang, Ling Fang, Junjie Chen, Wei Xu, Xiuyan Li
Summary: Grain refinement through severe plastic deformation (SPD) usually leads to strain softening in Al-Zn supersaturated solid solution. However, in this study, by cryogenic high-pressure torsion, a single-phase supersaturated solid solution nanostructure with relaxed grain boundaries was successfully achieved in Al-21.7 at% Zn alloy, resulting in giant hardening instead of softening. The nanocrystalline Al-Zn alloy with a grain size of 15 nm exhibits an ultrahigh yield strength of approximately 642 MPa.
MATERIALS RESEARCH LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Wanying Li, Yilong Dai, Dechuang Zhang, Jianguo Lin
Summary: The mechanical properties and local corrosion problems of AC Zn-0.5Li alloy were solved by UHPS-AT treatment, which improved the microstructure and wear resistance of the alloy. A passivation film was formed on the surface, changing the corrosion mechanism from local corrosion to uniform corrosion. Moreover, the Zn-0.5Li alloy showed good antibacterial properties.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Biochemistry & Molecular Biology
Pedro Simao Sousa Mendonca, Jeziel Rodrigues dos Santos, Osmair Vital de Oliveira, Jose Divino dos Santos, Elson Longo
Summary: Computational chemistry methods were used to study the potential of a silicon nanotube as a virucidal agent against COVID-19. The results showed that the nanotube had high reactivity and favorable binding energy with the receptor-binding domain of the SARS-CoV-2 spike protein.
JOURNAL OF BIOMOLECULAR STRUCTURE & DYNAMICS
(2023)
Article
Nanoscience & Nanotechnology
Marisa Carvalho de Oliveira, Marcelo Assis, Luiz Gustavo Pagotto Simoes, Daniel Tamassia Minozzi, Renan A. . P. Ribeiro, Juan Andres, Elson Longo
Summary: This research reveals the biocidal activity of SiO2-Ag composites, which can eliminate Staphylococcus aureus and SARS-CoV-2 virus in just 2 minutes. The material destroys the virus structure by generating reactive oxygen species, as predicted by first-principles calculations.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Electrochemistry
Maria Joseita dos Santos Costa, Aline Estefany Brandao Lima, Ester Pamponet Ribeiro, Gilson dos Santos Costa, Elson Longo, Geraldo Eduardo da Luz, Laecio Santos Cavalcante, Reginaldo da Silva Santos
Summary: This paper discusses a facile method for preparing transition metal tungstate thin films and their remarkable photoelectrochemical properties. The films were deposited onto conductive fluorine-doped tin oxide (FTO) glass substrate. The results show that the films have crystalline structures and nanostructured materials. They also demonstrate indirect transitions and successful application as photoanodes in a photoelectrochemical cell under polychromatic irradiation. This work provides a comparative and comprehensive study on AWO(4) films and suggests their potential applications in water splitting reactions and other photoelectrocatalytic processes.
JOURNAL OF APPLIED ELECTROCHEMISTRY
(2023)
Article
Chemistry, Analytical
Mauricio Bomio, Pedro Lavela, Ricardo Luis Tranquilin, Fabiana Villela da Motta, Jose Luis Tirado
Summary: Microwave calcination is introduced as a substitute for conventional heating in electric furnace for the production of high-performance electrodes for sodium-ion batteries. The microwave annealing process allows for shorter annealing time and the preparation of pure and highly crystalline Mg-doped Na2/3Ni1/3Mn2/3O2 samples. The electrochemical performance of the microwave calcined samples is superior to a reference sample prepared by conventional heating methods, as evidenced by the kinetic response at different stages of galvanostatic cycling. This improvement can be attributed to the larger crystallite size and lower microstrains achieved through microwave annealing, which result in reduced resistive behavior, higher Na+ diffusion coefficient, and lower internal resistance of the positive electrode.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Rafael W. R. Santana, A. E. B. Lima, Luiz K. C. de Souza, Evelyn C. S. Santos, C. C. Santos, A. S. de Menezes, Surender K. Sharma, L. S. Cavalcante, Marcelo E. H. Maia da Costa, T. O. Sales, Carlos Jacinto, G. E. Luz Jr, M. A. P. Almeida
Summary: We synthesized p-BiOBr/n-ZnWO4 heterostructures through a simple hydrothermal/precipitation method, which significantly enhanced the photocatalytic degradation of Rhodamine B (RhB) dye and ciprofloxacin antibiotic. The heterostructures exhibited a mixed tetragonal/monoclinic phase with n-ZnWO4 nanocrystals on the surface of p-BiOBr microcrystals. The unique structure led to improved light absorption and efficient degradation of pollutants.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
Article
Chemistry, Physical
Laura O. Libero, Lara K. Ribeiro, Luis I. Granone, Maria S. Churio, Josiane C. Souza, Valmor R. Mastelaro, Juan Andres, Elson Longo, Lucia H. Mascaro, Marcelo Assis
Summary: This study reports on the immobilization of Fe-2(MoO4)(3) in chitosan films and its effect on the oxidation reaction of sulfide derivatives. The catalyst showed good yields and excellent selectivity, even tolerating oxidatively sensitive functional groups. The key success of the selective oxidation was attributed to the presence of hydroxyl radical, center dot OH, and the Fe3+/Fe2+ Fenton-like process. Additionally, the synergistic effect between Fe-2(MoO4)(3) and chitosan was demonstrated in the selective oxidation of sulfides to sulfones. This work provides a design strategy for efficient catalysts that can be applied to other semiconductors and oxidation processes.
Article
Materials Science, Multidisciplinary
L. N. M. de Araujo, B. S. Sousa, A. G. F. de Araujo, R. M. Moncao, M. C. Feitor, J. C. Sczancoski, M. A. P. Almeida, F. E. P. Santos, R. R. M. de Sousa, L. S. Cavalcante
Summary: This paper presents a new method for producing pure zinc tungstate (ZnWO4) nanocrystals through thermal plasma processing. The amorphous powders were prepared by coprecipitation method and then processed at different temperatures. The best effect was achieved at 600 degrees C for 1 h, resulting in single-phase ZnWO4 nanocrystals with a wolframite-type monoclinic structure.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Chemistry, Physical
Rodrigo Espinoza-Gonzalez, Josefa Caamano, Ximena Castillo, Marcelo O. Orlandi, Anderson A. Felix, Marcos Flores, Adriana Blanco, Carmen Castro-Castillo, Francisco Gracia
Summary: The structural and gas sensing properties of CaCu3Ti4O12 compound prepared by sol-gel technique were studied. The compound exhibited pseudo-cubic phase with less than 4 wt% of secondary phases. Microstructural analysis was performed using scanning electron microscopy, while elemental composition was determined by X-ray energy dispersive spectroscopy. Gas sensing response of the samples showed selectivity for NO2, with the highest sensor signal at 250 ?.
Article
Nanoscience & Nanotechnology
Krishtappa Manjunatha, Hsin-Hao Chiu, Ming-Kang Ho, Tsu-En Hsu, Shih-Lung Yu, Chu-En Chin, Chia-Liang Cheng, Marisa Carvalho de Oliveira, Elson Longo, Renan A. P. Ribeiro, Hanumanthappa Nagabhushana, Sheng Yun Wu
Summary: By using the co-precipitate method, Mg-doped CoCr2O4 nanoparticles with controlled particle size were synthesized and their properties were investigated. The magnetic inhomogeneity of the nanoparticles was identified as the cause of the observed exchange bias effect. The nanoparticles showed potential applications in magnetic memory and magnetocaloric effect fields.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
D. C. Amaral, L. S. R. Rocha, L. I. Granone, M. M. Lage, M. S. Churio, M. D. Sanchez, E. Longo, H. M. S. Nascimento, M. Assis, F. Moura, M. A. Ponce
Summary: The influence of manganese modification on the spectroscopic features of manganese-doped CeO2 systems synthesized by the microwave-assisted hydrothermal route and their correlation with the presence of O defective structures were verified. Raman and electron paramagnetic resonance studies confirmed the presence of defective clusters formed by dipoles and/or quadrupoles. The number of paramagnetic species was found to be inversely proportional to the doping concentration, resulting in an increase in the Mn2+ signal, likely due to the reduction of Mn3+ species after the interaction with CO. X-ray photoelectron spectroscopy data showed significant changes in the Ce3+ and Mn2+ configurations with the introduction of manganese modification, suggesting the formation of nonparamagnetic Ce4+ species and the persistence of paramagnetic Mn2+ species.
INORGANIC CHEMISTRY
(2023)
Article
Multidisciplinary Sciences
Alexandre de Oliveira Jorgetto, Maria Valnice Boldrin Zanoni, Marcelo Ornaghi Orlandi
Summary: Microporous Sn2+-containing SnO2 material with microrod morphology and a relatively large surface area has been synthesized. The material exhibits superior photoactivity due to the presence of Sn2+ states in its band structure. The internal crystalline structure analysis reveals a mesocrystalline structure at the nanoscale level.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Analytical
Paulo V. Morais, Pedro H. Suman, Michael J. Schoening, Jose R. Siqueira Jr, Marcelo O. Orlandi
Summary: This study aims to fabricate a reusable and robust sensing unit on an electrolyte-insulator-semiconductor (EIS) device to detect heavy metal ions such as lead and nickel. The EIS-Sn3O4 sensor shows a higher affinity for Pb2+ ions with a sensitivity of approximately 25.8 mV/decade, suggesting its potential as a feasible capacitive field-effect sensor for heavy metal detection.
Article
Materials Science, Multidisciplinary
Guilhermina Ferreira Teixeira, Heitor Secco Seleghini, Wagner Benicio Bastos, Natalia Jacomaci, Bojan Stojadinovic, Zorana Dohcevic-Mitrovic, Flavio Colmati, Miguel Angel San-Miguel, Elson Longo, Maria Aparecida Zaghete
Summary: Na2Nb2O6•H2O fibers were synthesized using a microwave-assisted hydrothermal method and used as a precursor for obtaining NaNbO3 fibers with piezoelectric characteristics. The NaNbO3 fibers consist of a mix of antiferroelectric and ferroelectric orthorhombic phases. Piezoresponse force microscopy revealed that the fibers have regions with ferroelectric domains and regions with no ferroelectric characteristics.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Inorganic & Nuclear
L. X. Lovisa, T. B. O. Nunes, R. R. Y. O. V. Wilson, E. Longo, M. Daldind, M. R. D. Bomio, F. V. Motta
Summary: This study successfully synthesized zinc-doped Bi2WO6 and demonstrated its good degradation performance for methylene blue through photocatalytic tests. Doping with Zn2+ improved photoluminescence, but excessive Zn2+ concentration inhibited photocatalytic properties.
DALTON TRANSACTIONS
(2022)
Article
Materials Science, Multidisciplinary
Roumanos Georges Dib Neto, Wagner Costa Macedo, Jose Diego Fernandes, Agda Eunice de Souza, Silvio Rainho Teixeira, Kleper de Oliveira Rocha, Elson Longo
Summary: Manganese oxides were synthesized via Microwave-Assisted Hydrothermal (MAH) method and characterized at different temperatures. The analysis results revealed the presence of five distinct phases and the occurrence of oxidation and reduction reactions. The chemical characterization indicated the presence of sodium ions, which can be used as intercalation compounds for energy storage device optimization.
MATERIA-RIO DE JANEIRO
(2022)
Article
Engineering, Chemical
Bingyao Wang, Tianyi Cai, Xiaoshu Cai, Wu Zhou, Zeqi Liu
Summary: The size and morphology of nanoparticles significantly impact their performance. Current methods, such as electron microscopy or atomic force microscopy, have limitations in sample preparation, processing time, and quantitative characterization. Therefore, it is crucial to develop a fast, accurate, and statistical method for measuring nanoparticle size and morphology. In this study, a new method called polarized imaging dynamic light scattering (PIDLS) is proposed, which irradiates nanoparticles with a vertical linearly polarized laser beam and utilizes a polarization camera to collect dynamic light scattering images at different polarization directions. The method effectively determines particle size, morphology, and sphericity based on depolarization patterns and degree of linear polarization. PIDLS also enables simultaneous measurement of particle size and morphology distributions, allowing for the evaluation of particle uniformity. The effectiveness of PIDLS is validated with the measurement of five types of industrial titanium dioxide.
Article
Engineering, Chemical
Qingye Meng, Shuangling Zhong, Jingfei Wang, Zhenqian Zhang, Yan Gao, Xuejun Cui
Summary: In this study, a non-toxic natural polysaccharide, sodium alginate (SA), was developed for targeted delivery of curcumin (CUR) in tumor therapy. The CUR was coated in microcapsules using a quick, efficient, and environment-friendly sonochemical method. The microcapsules showed similar toxicity to free curcumin in anti-tumour evaluation and exhibited effective antibacterial properties. This research has the potential to provide a low-cost tumor targeting vector and can be promoted for clinical application.
Article
Engineering, Chemical
Christin Velten, Mirko Ebert, Christian Lessig, Katharina Zaehringer
Summary: Ray tracing Particle Image Velocimetry (RT-PIV) is an optical technique that corrects for distortions in velocity measurements caused by transparent geometries in challenging optical systems. This study focuses on the challenges and implications of using RT-PIV in a body centred cubic (bcc) sphere packing with gaseous flow, where transparent glass balls are used for optical access. The results demonstrate the effectiveness of the method in reconstructing velocity fields behind transparent spheres.
Article
Engineering, Chemical
Yanhao Ye, Ji Xu, Wei Ge
Summary: By modeling neighboring particles as a single coarse-grained particle, the discrete particle method (DPM) can now simulate industrial-scale particle-fluid systems. However, there is still a lack of a systematic approach to determine the properties and interaction models of these coarse-grained particles, which affects the predictability of the method. In this study, kernel functions for modeling the coarse-grained particles are constructed based on the analysis of collisions between predefined particle groups, and the model parameters are determined by equating the statistical properties of the coarse-grained particles to those of the real particles. This approach has been effective in simulating the homogeneous cooling of granular gas and experimental fluidized beds.
Article
Engineering, Chemical
Boris I. Kharisov, Oxana V. Kharissova, Lucy T. Gonzalez, Yolanda Pena Mendez, Igor E. Uflyand, Idalia Gomez de la Fuente
Summary: Hydroxyapatite (HA) composites with carbon allotropes and nanocarbons are rapidly developing in materials chemistry, especially for medical applications. These composites can be synthesized using various methods and exhibit biocompatibility and hemocompatibility, making them suitable for bone regeneration and wastewater treatment.
Article
Engineering, Chemical
Xing Li, Qun Chen, Zhaozhao Liu, Cheng Zhou, Chen Wang, Chen Chen
Summary: The particle size distribution (PSD) curve is an important expression of soil properties. However, existing characteristic parameters can only represent some points of the curve and fail to capture all the information. This paper introduces a new fraction characteristic parameter based on grading entropy and proposes a refined presentation method for the PSD curve. The new method not only represents the differences in curve width more accurately but also has higher discrimination ability. The application of this method in describing deposit distribution and predicting soil hydraulic conductivity is discussed. The research results can provide reference for the refined representation of PSD curves.
Article
Engineering, Chemical
Qingjin Zhang, Liangliang Fu, Guangwen Xu, Dingrong Bai
Summary: This study comprehensively analyzes the temperature effect on the minimum fluidization velocity (Umf) in fluidized-bed reactors. The analysis reveals the influence of temperature on Umf is determined by the relative importance of hydrodynamic forces and interparticle forces, which result in changes in gas properties, bed voidage, and physiochemical characteristics of particles. An equation is derived to predict the temperature influences on Umf under broad temperature conditions.
Article
Engineering, Chemical
Josephine Oppotsch, Matthias Steinke, Miriam Fritsch, Fritz -Herbert Heinsius, Thomas Held, Nikoline Hilse, Viktor Scherer, Ulrich Wiedner
Summary: This work is the second part of a simulation study on processing densely packed and moving granular assemblies using PEPT. A cost-effective PET-like detector system is being developed to overcome the high cost of PET scanners commonly used for PEPT. Monte Carlo simulations and Geant4 software were used to study the spatial resolution of different scenarios, and it was found that oversampling and iteration improved the resolution significantly.
Article
Engineering, Chemical
Lian Duan, Zhixun Xia, Yunchao Feng, Binbin Chen, Likun Ma, Jianxin Hu
Summary: In this study, boron-magnesium agglomerates with varying mass ratios were prepared and the combustion process of these agglomerates under different oxygen-rich concentrations were investigated. The results showed that when the mass fraction of magnesium powder in boron-magnesium agglomerates exceeded a certain threshold, a transient flameout process occurred. This process is affected by the magnesium content of the agglomerate and the oxygen concentration in the ambient atmosphere.
Article
Engineering, Chemical
Lixia Hou, Chunxiao Qu, Min Su, Zhihan Liang, Qi Hao
Summary: This study investigates the impact of polymer modified Fe3O4 nanoparticles on lysozyme (Lys) crystallization under different conditions, using functionalized Fe3O4 magnetic nanoparticles (Polymer C@Fe3O4) as nucleation agents. The findings show that the surface charge density of Polymer C@Fe3O4 is highest at a modification mass ratio of 8:3 for Fe3O4 to Polymer C. By adding 15% of the PolymerC@Fe3O4 prepared from Fe3O4 with an average particle size of 150 nm, magnetic core lysozyme (M-Lys) crystals with an average particle size of 11.08 mm, narrow size distribution, and regular morphology were obtained with a yield of 82.42% within 60 min.
Article
Engineering, Chemical
Fangling Hu, Liangliang Fu, Qingjin Zhang, Guangwen Xu, Dingrong Bai
Summary: This study proposes a method for synthesizing high-quality forsterite using abundant boron mud waste through high-temperature thermochemical reactions. The reaction can be completed rapidly at low temperatures due to the high reactivity of fine raw powder materials. The synthesized forsterite products exhibit high densification, well-developed grains, and an activation energy of 165.5 kJ/mol in the temperature range of 1100-1500°C. This study provides a low-cost method for producing forsterite and an efficient solution for treating solid waste.
Article
Engineering, Chemical
Yi Liu, Yunyan Guo, Rui Zhu, Jinqiang Zhou, Zhengxu Lin, Kai Han, Chongwei An, Jingyu Wang, Bidong Wu
Summary: Improved controllability and energy density of ignition agents are important for the development of energetic composite materials. In this study, HNS/CL-20 composite microspheres were prepared using droplet microfluidics and emulsification techniques with GAP as the binder. The microspheres exhibited higher sphericity and particle size uniformity compared to raw HNS, and retained the crystal structure of both HNS and CL-20. The microspheres also showed higher apparent activation energy, better safety performance, and good dispersibility, demonstrating excellent ignition performance and significant energy release effects.
Article
Engineering, Chemical
Max Kriegeskorte, Nikoline Hilse, Phil Spatz, Viktor Scherer
Summary: This study experimentally analyzed the particle mechanics of a single floor in a multiple hearth furnace. The results showed that increasing the blade angle led to an increase in the particle free surface area. The frequency distribution of the mean distance among particles provided information about the morphology of the particle bulk.
Article
Engineering, Chemical
Min Cai, Shuangzhu Kong, Sheng Chen, Mengxi Liu, Chunxi Lu
Summary: Reasonable reactor design is crucial for increasing the C2 yield in the oxidative coupling of methane (OCM). This study focused on large-scale fluidized bed reactors and conducted experiments and simulations to investigate their hydrodynamics and reaction performance. The results showed that the consecutive reactions of ethylene were severe in the bubbling fluidized bed (BFB) reactor due to gas back-mixing, high solids holdup, and non-uniform solids distribution, while they were negligible in the riser reactor. Both reactors achieved isothermal operation for the OCM process, with the riser reactor showing higher C2 selectivity and yield compared to the BFB reactor. This study provides valuable information for OCM reactor design and commercialization.
Article
Engineering, Chemical
Jiangkui Hu, Shijie Yang, Yingying Pei, Xilong Wang, Yulong Liao, Shuai Li, Aolong Yue, Jia-Qi Huang, Hong Yuan
Summary: This review discusses the interfacial issues in all-solid-state lithium batteries (ASSLBs) based on sulfide solid electrolytes (SEs) and high-voltage cathodes, and proposes strategies to stabilize the electrolyte/cathode interfaces. The future research direction of electrolyte/cathode interfaces and the application prospects of powder technology in sulfide-based ASSLBs are also discussed.