Article
Materials Science, Ceramics
M. Sertkol
Summary: In this study, Mn0.5Zn0.5CdxFe2-xO4 (0.0 <= x <= 0.5) nanoparticles were successfully synthesized by sol-gel combustion approach, and the effects of cadmium on their structural, morphological, and magnetic properties were investigated. It was found that the magnetization value of the nanoparticles increased with lower Cd2+ doping content and then decreased gradually.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
S. Caliskan, M. A. Almessiere, A. Baykal, Y. Slimani, A. Demir Korkmaz, H. Gungunes, I. A. Auwal
Summary: Ni0.8Cu0.1Zn0.1MoxFe2-2xO4 (x <= 0.1) nanospinel ferrites (Mo -> NiCuZn NSFs) were synthesized using sol-gel method, showing a spinel structure formation without impurities. The nanoparticles' morphology and chemical composition were confirmed by SEM, TEM, HR-TEM, and EDX. The magnetic characteristics of Mo -> NiCuZn NSFs were investigated and revealed the significant role of Mo ions in influencing properties such as saturation magnetization, magnetic moment, coercivity, squareness ratio, and magneto-crystalline anisotropy constant. The samples exhibited superparamagnetic behavior at 300 K and magnetically soft behavior at 10 K.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Chemistry, Physical
Maria Myachina, Natalia Gavrilova, Victor Nazarov
Summary: This paper presents the results of an adsorption study on the alumina surface of molybdenum blue nanoparticles. It was found that the pH value significantly affects the quantitative parameters of adsorption. The Langmuir equation was used to estimate the capacity of a monolayer and the surface occupied by one molybdenum blue nanoparticle.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Optics
Vijay Singh, Sumandeep Kaur, Arti Yadav, A. S. Rao
Summary: A series of calcium aluminate phosphors doped with Tm3+ ions at various molar concentrations were prepared via sol-gel route. Various characterizations were conducted to identify the structural and luminescence properties. The prepared phosphors exhibited excellent blue emission under n-UV excitation, making them potentially suitable for application as blue emitters in white LEDs.
Article
Engineering, Environmental
Somendra Singh, Yogendra Yadawa, Amit Ranjan
Summary: This study describes a non-aqueous sol-gel synthesis of bismuth ferrite (BFO) particles in different solvents and evaluates their adsorption efficiency for methylene blue. The results show that BFO has excellent dispersion in water and the solvents used in the synthesis yield a mixture of rhombohedral and orthorhombic phases. The adsorption efficiencies of the samples vary depending on the solvent used, with DMSO showing the highest efficiency. The enhanced adsorption of DMSO samples is attributed to the better solvation and incorporation of sulfur in the metal-oxide network during the sol-gel reaction. The DMSO samples also exhibit good adsorption at high pH conditions.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Materials Science, Ceramics
C. Jesica Anjeline, D. P. Mali, N. Lakshminarasimhan
Summary: In this study, a nanocomposite of NiFe2O4 and LaFeO3 was synthesized via a sol-gel method, with the ratio of 1:2 of NiFe2O4-LaFeO3 exhibiting a high dielectric constant of 10390 at 1 kHz. The high dielectric constant and loss were attributed to the Maxwell-Wagner type space charge polarization arising from the microstructure that consists of large and continuous grain boundaries, and the conducting phase at the interface, respectively.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Inorganic & Nuclear
H. Boulahbel, M. Benamira, F. Bouremmad, N. Ahmia, S. Kiamouche, H. Lahmar, A. Souici, M. Trari
Summary: This study investigates the degradation of Congo red dye using NiFe2O4 prepared by the sol gel auto-combustion method with glycine as the fuel under sunlight irradiation. A TiO2-NiFe2O4 Z-scheme was constructed to enhance the photoactivity by reducing the recombination of electron/hole pairs. The photocatalysts were characterized by various techniques and the results showed that the p-NiFe2O4/n-TiO2 heterostructure effectively facilitated the charge separation and improved the overall efficiency of the photocatalytic process.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Andrea Rosati, Michele Fedel, Stefano Rossi
Summary: A set of NIR reflective nano-pigments with YIn0.9Mn0.1O3-ZnO stoichiometry were synthesized using sol-gel route. Different temperatures of calcination produced three ochre pigments and two blue shades, with the thermal properties and chemical changes monitored through TGA, DSC, FT-IR, XRD, and STEM analysis. The synthesized pigments exhibited NIR reflectance ability and were color-typed according to the CIE-1976L*a*b* method.
JOURNAL OF SOLID STATE CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Ilyes Baba-Ahmed, Daniel Gherca, Alexandra-Raluca Iordan, Mircea Nicolae Palamaru, Carmen Mita, Rachid Baghdad, Gabriel Ababei, Nicoleta Lupu, Mohamed Amine Benamar, Abdelkader Abderrahmane, Tiberiu Roman, Georgiana Bulai, Liviu Leontie, Adrian Iulian Borhan
Summary: In this research, a highly porous foam SrTiO3/NiFe2O4 heterostructure was formed using joint solid-state and sol-gel auto-combustion techniques. The self-assembly of SrTiO3 due to the gelation process of the nickel ferrite was proposed as the mechanism for the highly porous framework formation. Various spectrophotometric techniques were used to investigate the structural, morphological, optical, magnetic, and dielectric properties of the synthesized samples. The 75STO/25NFO heterostructure exhibited higher specific magnetization, coercivity, and permittivity values.
Article
Chemistry, Multidisciplinary
Yanting Lyu, Taka-Aki Asoh, Hiroshi Uyama
Summary: By converting recycled cigarette filters into cellulose filters as templates for preparing inorganic oxides, this study demonstrates the potential to produce TiO2 and SiO2 materials with fibrous structures and high surface areas, which can be used for water treatment applications.
Article
Chemistry, Multidisciplinary
Huixue Yao, Xueer Ning, Hong Zhao, Aize Hao, Muhammad Ismail
Summary: In this study, gadolinium-doped nickel ferrite thin films were synthesized using a sol-gel method, and the effects of Gd doping on the structural, optical, and magnetic properties were investigated. The results showed that with increasing Gd concentration, the lattice parameter increased, crystalline size decreased, optical band gap value increased, and better magnetic properties were observed at an appropriate Gd-doping concentration. Additionally, saturation magnetization was found to increase significantly and then sharply decrease with increasing Gd content, attributed to Gd-doping, exchange interaction, and redistribution of cations.
Article
Chemistry, Applied
Shohei Yamaguchi, Iori Umeki, Megumi Nagashima, Daisuke Yamamoto, Terumitsu Ishii, Akira Hashimoto, Kazunori Matsui
Summary: The study presents a simple and easy method to stabilize the lactone (L) form of Rhodamine B (RB) on the surface of a polytetrafluoroethylene porous film. The results show that the L-form of RB can be stabilized in the porous film under low polarity environment, and this phenomenon is not observed on polyethylene film and cellulose filter paper. Furthermore, a chemical stability test demonstrates that the equilibrium of RB immobilized on the porous film shifts from the L-form to the zwitterion (Z) form with an increase in environmental humidity.
COLORATION TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
M. A. Ashmawy, A. A. Sattar, H. M. El-Sayed
Summary: This study investigates the effect of different connectivity on the properties of NiFe2O4/PbZr0.52Ti0.48O3 (NFO/PZT) nanocomposites. The results show that the (0-3) connectivity exhibits higher magnetic properties and relative initial permeability, lower coercive field, and significantly increased Curie temperature compared to the (0-0) connectivity.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Chemistry, Multidisciplinary
Natalia Gavrilova, Maria Myachina, Victor Nazarov, Valery Skudin
Summary: In recent years, there has been considerable interest in developing a new, flexible method for synthesizing molybdenum carbide (Mo2C). This study demonstrated the potential of using nano-size clusters of molybdenum blue in combination with organic reducing agents to produce molybdenum carbide with varying properties. The synthesized samples showed high catalytic activity and specific surface area, making them suitable for dry reforming of methane.
Article
Engineering, Environmental
Kaijing Qu, Lei Huang, Siyu Hu, Chang Liu, Qinyu Yang, Lihong Liu, Kun Li, Zuoping Zhao, Zhenxing Wang
Summary: Ciprofloxacin (CIP) is a widely found antibiotic in various types of wastewater and sediments. It is difficult to decompose and harmful to humans. The development of cheap, environmentally friendly, and efficient biochar materials for removing CIP is practical and applicable.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Chemical
Ri Zhang, Shasha Zhang, Mengyan Ding
Summary: A thin liquid film method is proposed to evaluate sand erosion in annular flow. This method considers the direct interaction between the liquid film and gas core, as well as the entrainment and deposition of droplets. The erosion rate is calculated by considering the effects of liquid entrainment and particle velocity decay. The method is fully verified by comparing with experimental data.
Article
Engineering, Chemical
Yu Suo, Xianheng Su, Wenyuan He, Xiaofei Fu, Zhejun Pan
Summary: This research investigates the mechanical properties of sandstone-shale composite through orthogonal experimental method and discrete element simulation. The results show that different lithologies and thickness ratios can affect the strength and fracture mode of the composite rock samples.
Article
Engineering, Chemical
Maurizio Troiano, Andrea El Hassanin, Roberto Solimene, Alessia Teresa Silvestri, Fabrizio Scala, Antonino Squillace, Piero Salatino
Summary: This study investigates the potential of Fluidized Bed Finishing (FBF) for square flat AlSi10Mg specimens manufactured via Laser-Powder Bed Fusion (L-PBF) additive manufacturing technology. The results show that good finishing can be achieved using rotation-assisted tests, with a maximum reduction of surface roughness by 67%. Steel particles are found to be the most effective bed material.
Review
Engineering, Chemical
Ningbo Song, Wanzhong Yin, Jin Yao
Summary: Seawater's dissolved salts and minerals have various effects on the flotation process, including influencing the characteristics and behavior of flotation factors, as well as affecting the surface of sulfide minerals. In most cases, seawater has adverse effects on the flotation of sulfide minerals, but these effects can be mitigated by adjusting the reagents.
Article
Engineering, Chemical
Kaiqiao Wu, Shuxian Jiang, Victor Francia, Marc-Olivier Coppens
Summary: In rectangular and cylindrical annular fluidized beds, pulsating gas flow can create regular bubble patterns, overcoming challenges seen in conventional units. This study provides new opportunities for modularization of fluidized bed operations.
Article
Engineering, Chemical
Shuo Li, Huili Zhang, Jan Baeyens, Miao Yang, Zehao Li, Yimin Deng
Summary: The paper assesses the behavior of cohesive Geldart C-type particles when fluidized by air with the aid of vibration. It determines that mechanical vibration is a simple and effective method to improve the fluidity of cohesive particles during fluidization.
Article
Engineering, Chemical
Zhenfei Feng, Qingyuan Zhang, Shanpan Liang, Zhenzhou Li, Fangwen Guo, Jinxin Zhang, Ding Yuan
Summary: A new micro/mini-channel heat sink (MCHS) with a combined structure of longitudinal and transverse vortex generators is designed, using Al2O3 nanofluid as the working medium. The study explores the effects of transverse vortex generator shape and longitudinal vortex generator angle on the hydraulic and thermal characteristics, comprehensive performance, entropy generation, and exergy efficiency. The results show that the triangular transverse vortex generator improves the comprehensive performance and exergy efficiency. Combined with the longitudinal vortex generator, the MCHS achieves the best comprehensive performance, entropy generation, and exergy efficiency when the Reynolds number is 742.
Article
Engineering, Chemical
Kostas Giannis, Christoph Thon, Guoqing Yang, Arno Kwade, Carsten Schilde
Summary: This study presents a 3D convolutional neural network (3D-CNN) methodology for generating realistic 3D models of particles. The method trains on 2D projections of particle images to predict their 3D shapes, and evaluates the accuracy of the predictions using Fourier shape descriptors (FSDs). This methodology has wide applications in particle shape analysis.
Article
Engineering, Chemical
Zheng-qing Zhou, Lu-jia Chai, Yu-long Zhang, Ya-bin Wang, Ze-chen Du, Tian-yi Wang, Yu-zhe Liu
Summary: The dynamic oxidation and shell-breaking processes of aluminum nanoparticles (ANPs) during heating were studied using in situ transmission electron microscopy. The results revealed that the changes in shell thickness can be divided into three stages, and the active aluminum content of ANP decreased before shell-breaking.
Article
Engineering, Chemical
Fulei Chen, Huaqing Ma, Zihan Liu, Lianyong Zhou, Yongzhi Zhao
Summary: A particle breakage model based on the particle replacement scheme, using the polyhedral model to describe particles, is proposed in this work to accurately describe the breakage of a large number of particles. Additionally, a fast-cutting algorithm is proposed to reproduce the size distribution of progeny particles determined by the breakage model. The validation and simulation results show satisfactory accuracy, efficiency, and stability of the algorithm.
Review
Engineering, Chemical
Matteo Errigo, Christopher Windows-Yule, Massimiliano Materazzi, Dominik Werner, Paola Lettieri
Summary: Gas-solid fluidized-bed systems have advantages in terms of chemical reaction efficiency and temperature control, making them widely used in industrial applications. However, the design, scale-up, and optimization of these complex units are limited by the lack of deep physical understanding. Non-invasive and non-intrusive diagnostic techniques provide a way for researchers to study these systems without affecting the flow field or directly contacting the medium under study.
Article
Engineering, Chemical
Saeed Fateh, Mohammad Behshad Shafii, Mohammad Najafi, Cyrus Aghanajafi
Summary: Applying a magnetic field to ferrofluids alters their flow characteristics and enhances heat transfer. Through visualization and quantitative investigation, it is found that the magnetic field influences the flow patterns and velocity profiles, improving fluid mixing and vorticity magnitude.
Article
Engineering, Chemical
Lei Gao, Bingbing Wei, Xiaochuan Hu, Zaifeng Yao, Yiwen Fang, Xuejian Gao
Summary: In this study, a numerical model of sand triaxial test was established using discrete element software PFC3D, and an indoor triaxial test was conducted to calibrate the numerical model. The influence of microscopic parameters on the macroscopic mechanical response of sand was analyzed. The results showed that the friction coefficient had the greatest impact on the peak strength and residual strength of the sand's stress-strain curve, and it was positively correlated. The normal tangential stiffness ratio was negatively correlated, while the porosity and boundary flexibility stiffness had minimal influence on it.
Article
Engineering, Chemical
Xuan Liu, Jie Gong, Kai Jiang, Xiaojuan Lai, Yu Tian, Kang Zhang
Summary: This study aimed to improve the performance of lignite coal water slurries (CWSs) by synthesizing a series of three-arm amphiphilic block copolymers. By controlling the relative molecular weight, hydrophilic/hydrophobic ratio, and ionic group content, the apparent viscosity of CWSs was significantly reduced and the static stability was improved. Thermogravimetric testing and XPS analysis were conducted to reveal the mechanism behind the improved performance.
Article
Engineering, Chemical
Lanka Dinushke Weerasiri, Daniel Fabijanic, Subrat Das
Summary: Fluidization at low pressure offers significant benefits for the fine chemical industry. This study investigates the behavior of bubbles and bed expansion under low pressure conditions. It is found that lower pressure leads to larger bubbles, increased bubble quantity, and higher aspect ratio. The predictability is affected by the inhomogeneous fluidization, but low pressure fluidization can generate similar bubble sizes with lower fluidizing mass compared to atmospheric pressure.