Article
Materials Science, Multidisciplinary
Szymon Wojty, Tomasz Baran
Summary: The copper-nickel-oxide photocatalyst prepared based on a metal organic framework shows impressive activity in photocatalytic and photoelectrochemical water splitting with hydrogen evolution as well as photocatalytic degradation of volatile organic compounds. Additionally, it exhibits high cathodic photocurrents in alkaline solution, suggesting its potential as a efficient photocatalyst.
MATERIALS RESEARCH BULLETIN
(2021)
Article
Chemistry, Physical
Mamoru Kitaura, Kei Kamada, Toshiaki Ina, Hisanori Yamane, Manabu Ishizaki, Shinta Watanabe, Junpei Azuma, Isamu Yamamoto, Akimasa Ohnishi, Takeshi Usuki
Summary: The local structures of Gd atoms in Gd-3(Al, Ga)(5)O-12 garnet solid solutions grown using the Czochralski method were studied through X-ray and UV absorption spectroscopy experiments. The preferential sites for the occupation of Ga and Al atoms were identified, and positional fluctuations of neighboring O atoms buffered local distortions induced by the presence of Ga and Al atoms. Changes in high-resolution UV absorption spectra due to Gd intra-4f transitions on the Ga content were explained by considering crystal field and Coulomb repulsion on the Gd atom.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Siripond Phromma, Tuksadon Wutikhun, Panita Kasamechonchung, Suchinda Sattayaporn, Tippabust Eksangsri, Chaweewan Sapcharoenkun
Summary: Silver modified titanium dioxide (Ag-TiO2) nanoparticles with different loading were synthesized and their effects on the structure of TiO2 were investigated. The presence of Ag+-ion in TiO2 structure was confirmed, resulting in Ag substitution and oxygen vacancy in TiO2. XRD and XANES findings revealed the phase transformation and modification of lattice parameters of anatase and rutile phases in the TiO2 structure following Ag doping, indicating the successful introduction of Ag into TiO2. Low Ag doping contents showed better photocatalytic activity than higher doping contents under visible light.
MATERIALS RESEARCH BULLETIN
(2022)
Article
Chemistry, Multidisciplinary
Fatima Sajid, Naila Jabeen, Latif U. Khan, Manzar Sohail, Adeela Rehman, Zareen Akhter
Summary: The increased emission of volatile organic compounds (VOCs) and their adverse effects on the environment have led to the development of more economical and sustainable sensing technologies. Ethanol, a member of the VOC family, has harmful effects on human health and the environment. Therefore, there is a high demand for an efficient electrocatalyst for ethanol detection at ambient temperature. In this study, NiO-based sensing material was successfully synthesized by modifying NiO through transition metals doping (8% Cu and 8% Zn) and codoping (4% Cu + 4% Zn). The synthesized catalysts were characterized by various techniques, and it was found that the codoped NiO exhibited better catalytic performance for ethanol detection with a wide linear range and a low detection limit.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
Article
Chemistry, Physical
Hao Wang, Jiangwen Liao, Jiajun Zhong, Yunpeng Liu, Lei Yao, Lixiong Qian, Yuecheng Lai, Xin Wang, Yikun Li, Jianxin Song, Xueqing Xing, Guang Mo, Zhongjun Chen, Zhonghua Wu
Summary: This paper thoroughly discusses the evolution of the Ni atom coordination structure in the synthesis of Ni single atom catalyst using graphitic carbon nitride as a support. The results reveal a three-stage process in which the coordination configurations change as the temperature increases. The findings are further confirmed by simulations and calculations.
Article
Materials Science, Multidisciplinary
Seiya Shimono, Masataka Sekine, Yasuhiro Niwa, Hajime Sagayama, Koji Araki, Yoshiaki Hata, Hiroaki Kishimura
Summary: Novel organic-inorganic hybrid materials, including [MeIM]2[MnBr4] and [EtIM]2[MnBr4], were synthesized using a solid-state reaction method and characterized by various techniques. These compounds exhibited narrow green emission bands due to the electronic transitions of the Mn2+ ion, with [EtIM]2[MnBr4] showing a quantum efficiency of 74.5%. The luminescence properties of the materials were influenced by the solid-to-liquid phase transitions and the presence of [MeIM]+ and [EtIM]+ cations, as indicated by X-ray absorption fine structure spectra, differential scanning calorimetry curves, and temperature dependences of the photoluminescence spectra.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Materials Science, Multidisciplinary
M. A. Laguna-Marco, E. Arias-Egido, V Cuartero, J. Herrero-Albillos, P. Kayser, J. A. Alonso, G. Fabbris, D. Haskel, T. Irifune
Summary: This study investigates the interplay between the magnetic structure of Sr2NiIrO6 and lattice degrees of freedom under high pressure using x-ray absorption spectroscopy and x-ray diffraction. The results show non-monotonic changes in the x-ray magnetic circular dichroism spectrum with increasing pressure, indicating that the observed changes are not a transition from antiferromagnetic to ferromagnetic order. Instead, the changes can be better explained by the weakening/strengthening of the long-range antiferromagnetic interaction between the Jr sublattice planes associated with the reduction of the lattice parameters.
Article
Chemistry, Inorganic & Nuclear
Dmitry Tonkacheev, Ilya Vikentyev, Anna Vymazalova, Margarita Merkulova, Alexander Trigub, Elena Kovalchuk, Alexander Makeyev, Valentin Osadchii
Summary: In this study, synthetic mercury-bearing sphalerite and zinc-bearing metacinnabar crystals were grown using the salt flux method, showing that mercury exists in the form of a solid solution and there is an increase in the ionic radius in the crystal structure, but no change in the overall structure. The nominal oxidation state of mercury in the (Zn, Hg)S crystals was confirmed to be 2+.
JOURNAL OF SOLID STATE CHEMISTRY
(2022)
Article
Optics
Liza Basyrova, Vasilisa Bukina, Stanislav Balabanov, Alexander Belyaev, Viktor Drobotenko, Olga Dymshits, Irina Alekseeva, Marina Tsenter, Svetlana Zapalova, Alexander Khubetsov, Alexander Zhilin, Anna Volokitina, Vladimir Vitkin, Xavier Mateos, Josep Maria Serres, Patrice Camy, Pavel Loiko
Summary: The study compared a transparent Fe:MgAl2O4 ceramic with a transparent nanophase Fe:MgAl2O4-based glass-ceramic. The ceramic exhibited broad transparency with high in-line transmission, while the glass-ceramics contained multiple crystalline nanophases and had a more complex absorption character. Both materials show promise as saturable absorbers for mid-infrared lasers.
JOURNAL OF LUMINESCENCE
(2021)
Article
Multidisciplinary Sciences
Tayel El-Hasan, Messaoud Harfouche, Allayth Aldrabee, Nafeth Abdelhadi, Nizar Abu-Jaber, Giuliana Aquilanti
Summary: The study showed that the hydration process can reduce the presence of harmful chromium in combusted oil shale ash, while its impact on the transformation of vanadium is relatively minor.
Review
Engineering, Chemical
Ana Iglesias-Juez, Gian Luca Chiarello, Gregory S. Patience, M. Olga Guerrero-Perez
Summary: X-ray absorption spectroscopy (XAS) is a technique used to measure electron absorption spectra and study chemical bonds on catalyst surfaces. Researchers are developing new X-ray sources to measure catalyst stability and handle toxic substances.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Physical
Yao-Jen Tu, Shan-Li Wang, Ying-Rui Lu, Ting-Shan Chan, Cliff T. Johnston
Summary: This study synthesized six kinds of magnetic nanoferrites to investigate their ability in removing Sb(III) and Sb(V) from aquatic systems. The results showed that ZnFe2O4 had great potential to adsorb and oxidize Sb(III) in aqueous solutions, providing essential information for designing a rapid and effective Sb removal technique.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Engineering, Environmental
Innes Deans, Douglas Stewart, Jenny Jones, Jason Kam, Bhoopesh Mishra
Summary: The study assessed the uptake and distribution of zinc (Zn) and lead (Pb) in a seed-based Miscanthus hybrid grown in contaminated soil. The uptake of Zn and Pb increased in proportion to the soil concentrations by juvenile plants in a pot-trial. The accumulation of Zn and Pb differed between leaf and stem structures, and also between mature biomass and juvenile plants. X-Ray Absorption Fine Structures (XAFS) analysis revealed different Zn speciation in stems and leaves, as well as changes in Zn speciation with plant maturity. The dominant Zn species in juvenile plant leaves were sulfur ligands consistent with the presence of cysteine rich metallothioneins (MT) and phytochelatin (PC) complexes, along with octahedral O/N species typified by Zn-malate. Sulfur ligands were also prevalent in stems from juvenile plants, but the predominant O/N speciation shifted towards tetrahedral coordination. In contrast, tetrahedral Zn coordination with O/N species predominated in the mature biomass crop. The XAFS spectra for the mature biomass indicated that Zn was retained within cell walls as pectin and/or phosphate complexes.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Materials Science, Ceramics
Junqi Chen, Peili Qing, Jinwu Chen, Liang Fang
Summary: In this study, orthorhombic structured SrIn2O4 ceramics were synthesized and showed high relative density and excellent microwave dielectric properties. The analysis of chemical bonds and thermal conductivity activation energy revealed the important factors affecting the properties of SrIn2O4.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Geochemistry & Geophysics
Antonio Lanzirotti, Stephen Sutton, Matthew Newville, Elisabet Head
Summary: Magmatic oxygen fugacity has a significant impact on the valence states of vanadium in basaltic melts, and X-ray induced changes can affect the calculated vanadium valence. This study found that changes in vanadium speciation are dependent on radiation dose rate, with higher dose rates leading to larger changes. However, at lower flux densities, changes in valence are minimal. For terrestrial magmatic glasses, limiting flux densities can effectively minimize the changes in vanadium valence.
AMERICAN MINERALOGIST
(2022)
Article
Materials Science, Ceramics
Augusto Mejia Gomez, Joaquin Sacanell, Ana Gabriela Leyva, Diego G. Lamas
CERAMICS INTERNATIONAL
(2016)
Article
Chemistry, Physical
Joaquin Sacanell, Joaquin Hernandez Sanchez, Adrian Ezequiel Rubio Lopez, Hernan Martinelli, Jimena Siepe, Ana G. Leyva, Valeria Ferrari, Dilson Juan, Miguel Pruneda, Augusto Mejia Gomez, Diego G. Lamas
JOURNAL OF PHYSICAL CHEMISTRY C
(2017)
Article
Materials Science, Coatings & Films
Evangelina De Las Heras, Gabriel Ybarra, Diego Lamas, Amado Cabo, Eugenia Laura Dalibon, Sonia P. Bruhl
SURFACE & COATINGS TECHNOLOGY
(2017)
Article
Nanoscience & Nanotechnology
Augusto E. Mejia Gomez, Diego G. Lamas, Ana Gabriela Leyva, Joaquin Sacanell
Article
Chemistry, Multidisciplinary
Lucia M. Toscani, M. Genoveva Zimicz, Tereza S. Martins, Diego G. Lamas, Susana A. Larrondo
Article
Materials Science, Multidisciplinary
Hernan Martinelli, Diego G. Lamas, Ana G. Leyva, Joaquin Sacanell
MATERIALS RESEARCH EXPRESS
(2018)
Article
Materials Science, Ceramics
V. R. S. Cassimiro, R. C. Monteiro, R. Bacani, L. M. Toscani, D. G. Lamas, S. A. Larrondo, M. C. A. Fantini
CERAMICS INTERNATIONAL
(2019)
Article
Materials Science, Multidisciplinary
V. C. Fuertes, F. M. Eroles, A. D. Menzaque, W. J. Pelaez, D. G. Lamas
MATERIALS RESEARCH EXPRESS
(2019)
Article
Materials Science, Ceramics
Augusto E. Mejia Gomez, Diego G. Lamas, Ana Gabriela Leyva, Joaquin Sacanell
CERAMICS INTERNATIONAL
(2019)
Article
Chemistry, Physical
Augusto E. Mejia Gomez, Joaquin Sacanell, Cristian Huck-Iriart, Cinthia P. Ramos, Analia L. Soldati, Santiago J. A. Figueroa, Manfredo H. Tabacniks, Marcia C. A. Fantini, Aldo E. Craievich, Diego G. Lamas
JOURNAL OF ALLOYS AND COMPOUNDS
(2020)
Article
Chemistry, Physical
Lucia M. Toscani, Marina S. Bellora, Cristian Huck-Iriart, Analia L. Soldati, Joaquin Sacanell, Tereza S. Martins, Aldo F. Craievich, Marcia C. A. Fantini, Susana A. Larrondo, Diego G. Lamas
Summary: This study focuses on the analysis of SDC nanopowders and NiO/SDC nanocomposites in terms of their reducibility and catalytic activity for partial oxidation of methane. The results show that the crystallite size and surface area play a crucial role in methane activation by modifying the sample's redox behavior, with the oxidation of the metallic phase being the main cause of sample deactivation. A complex relationship between oxygen vacancy concentration and catalytic activity was observed during the experiments.
APPLIED CATALYSIS A-GENERAL
(2021)
Article
Materials Science, Multidisciplinary
R. Lozano-Rosas, Diego G. Lamas, Francisco Sanchez-Ochoa, Gregorio H. Cocoletzi, T. V. K. Karthik, M. J. Robles-Aguila
Summary: Different synthesis methods were used to obtain tungsten oxide powders, and their structural, optical, electrical, and gas sensing properties were studied. Results showed that WO3 samples exhibited good sensitivity to CO2 molecules, making them promising gas sensors.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Proceedings Paper
Electrochemistry
Joaquin Sacanell, J. Hernandez Sanchez, A. E. Rubio Lopez, H. Martinelli, J. Siepe, A. G. Leyva, V. P. Ferrari, M. Pruneda, D. Juan, D. G. Lamas
SOLID OXIDE FUEL CELLS 15 (SOFC-XV)
(2017)
Article
Chemistry, Physical
M. G. Zimicz, F. D. Prado, D. G. Lamas, S. A. Larrondo
APPLIED CATALYSIS A-GENERAL
(2017)
Article
Materials Science, Ceramics
R. Bacani, L. M. Toscani, T. S. Martins, M. C. A. Fantini, D. G. Lamas, S. A. Larrondo
CERAMICS INTERNATIONAL
(2017)
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.