Article
Chemistry, Physical
Abdulmumeen Lohmaah, Komkrich Chokprasombat, Supree Pinitsoontorn, Chitnarong Sirisathitkul
Summary: The study demonstrates the substitution of copper in barium hexaferrite crystals as a cost-effective way to achieve alterable magnetic properties. Different substitution levels of Cu influence the morphology and magnetic properties of the crystals significantly.
Article
Chemistry, Physical
C. Yang, Y. Hu, X. Y. Wang, Q. Z. Hong, Q. H. Sun
Summary: A hybrid stochastic simulation method is developed to study H-2-O-2 auto-ignition at the microscale. Simulation results show that the discrete and stochastic characteristics of reaction collisions have notable impacts on the ignition process, particularly in the early stages when only a few radicals exist. The statistical properties of ignition delay time, which reflect the accumulated stochasticity during ignition, are obtained and analyzed for different initial temperatures and total molecular numbers. Rating: 8/10.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Multidisciplinary Sciences
Odysseas Sierepeklis, Jacqueline M. Cole
Summary: This study presents an auto-generated database of thermoelectric materials, which contains a large amount of data records extracted from scientific literature. Each record includes a chemical entity and its corresponding thermoelectric property. The research also applies chemistry-aware, natural language processing tools for automatic sentence parsing and simplification, achieving a precision of 82.25% for the generated database.
Article
Materials Science, Ceramics
Jie Zhang, Fei Li, Liran Dong, Zhanglin Chen, Wei Cui, Songmo Du, Shijia Zhang, Kexin Chen, Guanghua Liu
Summary: Spherical Si@Si3N4 granules were successfully synthesized using in situ combustion synthesis. The granules have a dense internal structure without cracks, and the Si3N4 grains on the surface are well-bonded without the use of binders. The synthesized granules show great potential for heat dissipation in electronic devices.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
M. A. Gabal, E. A. Al-Harthy, Y. M. Al Angari, A. Awad, A. A. Al-Juaid, A. M. Abdel-Daiem, Abdu Saeed
Summary: Mn0.8Zn0.2Fe2O4 ferrites were successfully prepared from spent Zn-C batteries using sol-gel auto-combustion techniques with various fuels. The prepared ferrites exhibited single-phase formation with different cation distributions on A and B-sites, as confirmed by XRD and TEM analysis. The magnetic and electrical properties of the ferrites were influenced by the preparation route and showed potential for industrial applications at low frequencies.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2021)
Article
Physics, Multidisciplinary
Binbin Chen, Nicolas Gauquelin, Robert J. Green, Johan Verbeeck, Guus Rijnders, Gertjan Koster
Summary: The structural and magnetic properties of LaMnO3/LaFeO3 (LMO/LFO) heterostructures are characterized by different interfacial chemical profiles, resulting in distinct magnetic behaviors. Bilayers with abrupt interfaces show enhanced coercivity, while those with intermixed interfaces display step-like hysteresis loops.
FRONTIERS IN PHYSICS
(2021)
Article
Energy & Fuels
Aikun Tang, Haibo Liu, Tao Cai, Chong Li, Lingjie Gao
Summary: This study experimentally evaluated and analyzed the effects of using Pt/Al2O3-based catalyst to enhance combustion under micro-scale conditions. The results show that the application of such catalysts leads to a more stable flame structure, widening of the flammable range, and more intense thermal coupling.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2022)
Article
Materials Science, Ceramics
Yaseen K. R. Shariff, Harish K. Choudhary, Vijay Khopkar, Ankit Yadav, R. Madhusudhana, Balaram Sahoo
Summary: This study reports the synthesis mechanism of Ba-Sr hexaferrite ceramic powders, revealing different phase evolution under various annealing conditions associated with the ionic radii difference, leading to the presence of multiple phases. The growth of hexagonal-shaped particles with varied sizes suggests the influence of ionic radii difference on the sinterability of the samples. The research provides a better understanding of the synthesis mechanism of Ba-Sr hexaferrite samples.
CERAMICS INTERNATIONAL
(2021)
Article
Nanoscience & Nanotechnology
Xin Cheng, Bo Zhu, Dongwang Yang, Xianli Su, Wei Liu, Hongyao Xie, Yun Zheng, Xinfeng Tang
Summary: In this study, (Ag, In)-co-doped Cu2SnSe3-based compounds were prepared using a self-propagating high-temperature synthesis process, followed by plasma-activated sintering (PAS) to obtain consolidated composite bulks. The addition of Ag2Se was found to effectively enhance the thermoelectric properties of the composites, resulting in optimized power factor and significantly suppressed lattice thermal conductivity.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
Zhilei Wei, Zhejian Zhang, Xiaoyu Zhang, Zhiyuan Li, Tao Li, Jiabin Hu, Shunjian Xu, Zhongqi Shi
Summary: The research successfully developed a novel method for fabricating unidirectional porous AlN ceramics via freeze casting and combustion synthesis route, allowing for control over microstructure, open porosity, thermal conductivity, and compressive strength by adjusting the raw material ratios. The optimal products exhibited controllable structure wavelength and open porosity, with anisotropic thermal conductivity and compressive strength, showing significant promise for a wide range of industrial applications.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Inorganic & Nuclear
Divya Vijayan, Jijimon K. Thomas, Sam Solomon
Summary: We report the synthesis, structural, optical, and electrical characteristics, along with the structural evolution at different temperatures of rarely studied compound Ln(2)Zr(2)O(7). The compound exhibits high absorbance in the UV region, high reflectance in the visible region, and wide optical bandgap energy. Impedance spectroscopic study reveals pure oxide-ion conductivity of the compound in a temperature range of 550°C to 850°C.
SOLID STATE SCIENCES
(2022)
Article
Agricultural Engineering
Kao Wu, Zijian Ye, Junjie Cheng, Yang Zeng, Ran Wang, Weiwei Sun, Ying Kuang, Fatang Jiang, Sheng Chen, Xiaojun Zhao
Summary: The growing social awareness of the green industry has driven the rapid development of eco-friendly insulation biomass aerogels to replace traditional ones. In this study, a full biomass konjac glucomannan/sodium alginate aerogel was fabricated with phytic acid (PA) addition to strengthen its thermal insulation and flame retardancy properties. The obtained aerogel exhibited excellent thermal insulation and flame retardancy.
INDUSTRIAL CROPS AND PRODUCTS
(2023)
Article
Chemistry, Physical
Shanigaram Mallesh, Wongyu Jang, Ki Hyeon Kim
Summary: The correlation between microstructure, magnetic, and high-frequency electromagnetic properties of porous MnFeCoO4 structures synthesized by simple sol-gel auto combustion method was studied. Annealing temperature had a significant impact on the morphology and properties, influencing pore size, particle size, and development of hexagonal planes on particle surfaces. The magnetization and dielectric loss were found to increase with annealing temperature, reaching maximum values at 1200 degrees C.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Duan Gao, Shengyi Liu, Yunci Li, Lihong Cheng, Xizhen Zhang, Jinsu Zhang, Sai Xu, Xiangping Li, Yongze Cao, Yichao Wang, Hongquan Yu, Yuhang Zhang, Xuezhu Sha, Li Wang, Baojiu Chen
Summary: A series of NaYF4:Sm3+ phosphors with different Sm3+ concentrations were prepared using an auto-combustion-assisted fluorination method. XRD analysis confirmed the crystal structure of pure phase NaYF4:Sm3+. FE-SEM images revealed irregular and agglomerated hexagonal-like particles in the phosphors. Fluorescence spectra were used to study the concentration quenching and luminescence thermal stability of NaYF4:Sm3+ phosphors. The mechanism of energy transfer between Sm3+ ions was determined to be electric dipole-dipole interaction based on Van Uitert's model. The temperature-dependent fluorescence and thermal quenching behavior of Sm3+ in NaYF4 powders were investigated, and the optical transition properties of Sm3+ in NaYF4 phosphors were analyzed using the Judd-Ofelt theory based on the diffuse-diffraction spectrum and fluorescence decay curve.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Multidisciplinary Sciences
Brandi L. Wooten, Ryo Iguchi, Ping Tang, Joon Sang Kang, Ken-ichi Uchida, Gerrit E. W. Bauer, Joseph P. Heremans
Summary: This article experimentally demonstrates that an external electric field has an impact on the velocity of longitudinal acoustic phonons, thermal conductivity, and diffusivity in a bulk lead zirconium titanate-based ferroelectric. The changes observed are due to alterations in the phonon dispersion, not phonon scattering. This finding provides insights into the nature of thermal fluctuations in ferroelectrics and opens up possibilities for phonon-based all-solid-state heat switches, which are crucial for solid-state heat engines. A quantitative theoretical model combining piezoelectric strain and phonon anharmonicity explains the field dependence of these properties without any adjustable parameters, bridging the gap between thermodynamic equilibrium and transport properties. This effect is four times larger than previously reported effects attributed to field-dependent phonon scattering.
Article
Chemistry, Physical
Indranil Dutta, Nasser A. Alobaid, Fabio Lorenzo Menicucci, Priyanka Chakraborty, Chao Guan, Delong Han, Kuo-Wei Huang
Summary: The utilization of formic acid as a liquid organic hydrogen carrier has recently gained significant attention due to its desirable properties. In this study, a manganese complex [Mn(PN3P)(CO)2]Br was found to be an efficient catalyst for formic acid dehydrogenation, with a high turnover number (TON) of 15,200. This represents one of the best TON achieved using a manganese-based complex, demonstrating the importance of metal-ligand cooperativity in substrate activation for catalytic efficacy.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Materials Science, Multidisciplinary
A. A. Al-Juaid
Summary: Lanthanum-substituted cobalt ferrites (CoFe2-xLaxO4) with different La contents (x = 0.00-0.09) were successfully synthesized using the sucrose sol-gel auto-combustion method. The La substitution influenced the structural, magnetic, and electrical/dielectric properties of the samples, as revealed by various characterization techniques. XRD and FT-IR analyses indicated that the crystal structure was not significantly affected by La substitution, while the formation of orthorhombic LaFeO3 at high La contents led to a deviation from the single-phase structure. VSM measurements showed a gradual decrease in magnetization with increasing La content, which was attributed to the decrease in super-exchange interaction caused by the preferential substitution of La3+ ions in the octahedral sites. Furthermore, electrical conductivity measurements demonstrated the semiconducting behavior of the samples, with a decrease in conductivity observed with increasing La content.
MATERIALS RESEARCH EXPRESS
(2023)
Article
Chemistry, Multidisciplinary
Areej Aljarb, Jiacheng Min, Mariam Hakami, Jui-Han Fu, Rehab Albaridy, Yi Wan, Sergei Lopatin, Dimitrios Kaltsas, Dipti Naphade, Emre Yengel, Mohamed Nejib Hedhili, Roaa Sait, Abdul-Hamid Emwas, Arwa Kutbee, Merfat Alsabban, Kuo-Wei Huang, Kaimin Shih, Leonidas Tsetseris, Thomas D. Anthopoulos, Vincent Tung, Lain-Jong Li
Summary: Growing continuous monolayer films of TMDs without disrupting grain boundaries is a challenge. The presence of an interfacial reconstructed (IR) layer within the substrate-epilayer gap affects the orientations of nucleating TMDs domains and materials' properties. These findings have implications for the development of TMD-based electronics and optoelectronics.
Article
Materials Science, Multidisciplinary
M. A. Gabal, Ebtesam Al-Mutairi, Y. M. Al Angari, A. Awad, A. A. Al-Juaid, Abdu Saeed
Summary: Ternary hybrid composites MFe2O4/PANI/MWCNTs (M = Co2+, Cu2+, Mg2+, Ni2+, and Zn2+) were synthesized using sucrose-assisted auto-combustion route followed by in situ polymerization. The developed composites showed improved thermal stability, high conductivity, and dielectric constants. XRD and FT-IR measurements indicated interaction between the composite components. TEM exhibited the adsorption of MFe2O4 to MWCNTs and their coating with PANI layers. VSM indicated a reduction in magnetization due to the coating of magnetic MFe2O4 with non-magnetic PANI. Electrical properties measurements revealed the significant improvement in conductivity and dielectric constants by incorporating ferrites in the composites.
JOURNAL OF MATERIALS RESEARCH
(2023)
Article
Materials Science, Ceramics
M. A. Gabal, E. A. Al-Harthy, Y. M. Al Angari, A. Awad, A. A. Al-Juaid, Abdu Saeed
Summary: In this study, ternary hybrid composites (PMG) were synthesized by combining polypyrrole (PPy), Mn-Zn ferrite (MZF), and graphite oxide (GO). The MZF was synthesized using acid leaching and auto-combustion processes. The XRD analysis showed that only PPy peaks were present in the ternary hybrids, suggesting the inclusion of MZF and GO into the PPy matrix. TEM images and EDS analysis confirmed that MZF particles and GO layers were embedded and coated with PPy. The electrical measurements showed that the conductivity of PMG composites was dependent on temperature up to 420 K, where dehydration and decomposition occurred. The presence of GO slightly improved the conductivity compared to pure PPy.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Organic
Xinyu Liu, Zhixin Liu, Yongyi Hu, Kuo-Wei Huang, Manjaly J. Ajitha, De Wang
Summary: A novel alpha,beta-regioselective [3+2] cycloaddition reaction of arylallene with C,N-cyclic azomethine imine is reported. The axial-to-central chirality transfer phenomenon has been disclosed with chiral allenes in the reaction. The wide substrate scope, including different functional groups and natural products, reveals the generality of the methodology. Both experiments and density functional theory calculations have been used to elucidate a plausible mechanism.
Article
Chemistry, Multidisciplinary
Hao Huang, Dharmaraj Periyanagounder, Cailing Chen, Zhongxiao Li, Qiong Lei, Yu Han, Kuo-Wei Huang, Jr-Hau He
Summary: Developing a green and energy-saving artificial leaf for solar-driven ammonia conversion is achieved by imitating the biological nitrogen fixation and photosynthesis processes. The monolithic artificial leaf achieves high ammonia production rates and Faradaic efficiencies without applying external potential. By integrating an OER catalyst, the artificial leaf can directly convert solar energy into chemical energy and generate useful products. The importance rating of this research is 8 out of 10.
Article
Chemistry, Multidisciplinary
Tianyu Zheng, Rui Chen, Jingxian Huang, Theo P. Goncalves, Kuo-Wei Huang, Ying-Yeung Yeung
Summary: Bifunctional catalysis is important in synthesizing useful compounds. Confined bifunctional catalysts can achieve highly enantioselective reactions. This study demonstrates a proof-of-concept approach to formulating confined catalysts by linking catalytic species via non-covalent interactions. The reactions are optimized by changing the achiral catalyst.
Article
Engineering, Environmental
Hend Omar Mohamed, Vijay K. Velisoju, Idoia Hita, Omar Abed, Rajesh K. Parsapur, Naydu Zambrano, Mohamed Ben Hassine, Natalia Morlanes, Abdul-Hamid Emwas, Kuo-Wei Huang, Pedro Castano
Summary: By using the in situ modified zeolite technique, researchers have successfully developed an efficient catalyst with high Ni2+ species concentration and good dispersion, which can improve the yield and stability of 1-butene while reducing the formation of by-products.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Fatimah Mohammad H. Al Sulami, Merfat M. Alsabban, Ahlam I. Al-Sulami, Mohamed Farrag, Sylvain Vedraine, Kuo-Wei Huang, Eslam Sheha, Talaat A. Hameed
Summary: Replacing selenium with sulfur in Cu1.8Se can improve the low electronic conductivity of Cu-Se and mitigate the effect of polysulfide species. A Cu1.8Se0.6S0.4 nanocrystalline powder was synthesized by solid-state reaction and its structure and storage mechanism were confirmed by various characterization techniques. Significant surface morphology changes were observed during the charging/discharging process.
Article
Chemistry, Physical
Xingzhu Chen, Luigi Cavallo, Kuo-Wei Huang
Summary: In the past decade, density functional theory (DFT) calculations have been used to investigate the mechanism of electrochemical CO2 reduction reactions. However, the lack of understanding regarding CO2 chemisorption states, proton-coupled-electron-transfer (PCET) steps, and dynamic redox reactions of the electrode surface has limited the reliability of these simulations. This work proposes a descriptor, the energy difference between *COOH on neutral and extra-electron substrates, as a means to determine the selectivity of electrochemical CO2 reduction.
Article
Chemistry, Organic
Delong Han, Priyanka Chakraborty, Li Yang, Hao Huang, Kuo-Wei Huang
Summary: Alkylation of a nitride ligand of a post-modified Mo(V) complex with MeOTf and EtOTf resulted in the formation of highly stable Mo(IV) imido complexes. Unlike the known Mo(VI) nitride complexes, which can be deprotonated to form ketimide for further reactions, the alkylation products in this study could only be reduced by NaH. Treatment with PhCH2OTf led to the formation of a new dinuclear Mo complex with N-2 release, instead of benzylation of the nitride ligand.
ASIAN JOURNAL OF ORGANIC CHEMISTRY
(2023)
Review
Chemistry, Multidisciplinary
Chen-Fu Lin, Kuo-Wei Huang, Yen-Ting Chen, Sung-Lin Hsueh, Ming-Hsien Li, Peter Chen
Summary: This review introduces X-ray detectors using various halide perovskite materials and discusses their performance. Single-crystal perovskite as an active material exhibits excellent performance under X-ray illumination, while inorganic perovskite shows good environmental stability and high X-ray sensitivity. Double perovskite with the introduction of high-atomic-numbered elements demonstrates better attenuation of X-rays, and lead-free perovskite exhibits potential application in X-ray detectors due to its high X-ray attenuation capability. The up-scaling process technology for fabricating large-area and thick perovskite films for X-ray detectors is also introduced.
Review
Chemistry, Multidisciplinary
Bin Chang, Hong Pang, Fazal Raziq, Sibo Wang, Kuo-Wei Huang, Jinhua Ye, Huabin Zhang
Summary: In this review, the recent progress and challenges in preparing C2+ products are discussed. The recent advancements in carbon-carbon coupling results and proposed mechanisms are elaborated, along with the complex scenarios involved in the initial CO2 activation process, catalyst micro/nanostructure design, and mass transfer conditions optimization. The synergistic realization of high C2+ product selectivity through catalyst design and the influence of electrolytes using theoretical calculation analysis and machine learning prediction are also proposed. The in situ/operando techniques for tracking structural evolution and recording reaction intermediates during electrocatalysis are elaborated, as well as insights into triphasic interfacial reaction systems with improved C2+ selectivity.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Chemistry, Physical
Lujain Alrais, Sandeep Suryabhan Gholap, Indranil Dutta, Edy Abou-Hamad, Benjamin W. J. Chen, Jia Zhang, Mohamed Nejib Hedhili, Jean-Marie Basset, Kuo-Wei Huang
Summary: Formic acid is a promising hydrogen carrier for on-demand hydrogen generation. By immobilizing a homogeneous PN3P-Ir pincer catalyst onto a support, the advantages of both homogeneous and heterogeneous catalysts can be combined. The use of cesium formate as a reaction medium and basic additive under suitable conditions significantly improves the reactivity.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
