Article
Chemistry, Analytical
Hui Li, Chun-Han Wu, Yi-Cheng Liu, Shuo-Huang Yuan, Zong-Xian Chiang, Sam Zhang, Ren-Jang Wu
Summary: In this study, a WO3-TiO2 composite was fabricated as a hydrogen gas sensing element, showing high response, short recovery time, and mesoporous structure. The material exhibited good stability and repeatability, with a potential for practical applications as a hydrogen sensing element.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Physical
Yuanting Wu, Mengyao Guan, Xiaojing Chang, Jinrong Wang, Shuming Xu
Summary: We constructed a homogeneous double-layer TiO2-ZrO2-SiO2 photocatalyst with multi-heterojunction (D-TZS) using a simple sol-gel method, which effectively improves the photocatalytic property. By investigating various factors, we found that D-TZS can degrade Rh B by about 99.6% within 40 minutes and almost completely degrade it within 60 minutes. This is attributed to the homogeneity, multiple heterojunctions, and oxygen vacancies of D-TZS.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Analytical
Xiqian Sun, Qing Lan, Jing Geng, Mengli Yu, Yecheng Li, Xiaohong Li, Li Chen
Summary: By assembling TiO2 nanoparticles decorated with polyoxometalate (POM) and organic dye molecules, we have achieved accelerated room-temperature sensing of NO2 gas under visible light illumination. This method improves the sensitivity and response/recovery time of the gas sensors, while maintaining high selectivity and relatively low detection concentration.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Materials Science, Multidisciplinary
Wei Wei, Huanhuan Zhang, Tiyue Tao, Xiaohong Xia, Yuwen Bao, Manon Lourenco, Kevin Homewood, Zhongbing Huang, Yun Gao
Summary: In this work, a carbon monoxide sensor based on the CuO/TiO2 heterojunction was designed and fabricated. The sensor exhibits high sensitivity to CO at room temperature due to the good adsorption properties of CuO materials and the heterojunction interface charge transfer. The interference from H-2 is greatly reduced by optimizing the structure of the CuO/TiO2 heterojunction.
ENERGY & ENVIRONMENTAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Wenhao Wang, Lu Zhang, Yanli Kang, Feng Yu
Summary: The study successfully prepared TiO2-CoFe2O4-Ag composite material for detecting toluene gas by constructing heterojunction and doping with Ag, which enhanced the sensitivity and reduced the working temperature. The novel composite material showed superior performance in detecting toluene gas with low temperature, short response time, and high sensitivity.
Article
Chemistry, Physical
Bowen Zhang, Xiangli An, Saisai Zhang, Chongyang Wang, Zhiyong Zhao, Hari Bala, Zhanying Zhang
Summary: In this study, a highly regular array of TiO2 nanorods was prepared on FTO by a modified in situ hydrothermal method, followed by the growth of a uniform SnO2 layer on the nanorods to form a core-shell nanocomposite through an ion-layer adsorption-reaction process. The TiO2/SnO2 sensors exhibited improved gas sensing performance compared to TiO2 sensors, including higher sensitivity to ethanol, lower working temperature, and better long-term stability. The highest ethanol response was achieved when the growth cycle of the SnO2 shell was two times. The gas-sensing mechanism of the TiO2/SnO2 nanocomposites was attributed to their unique core-shell structure and the heterojunction between TiO2 and SnO2.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Yongjie Zhang, Cong Qin, Run Zhang, Yan Zhang, Yan Wang, Zhanying Zhang, Jianliang Cao
Summary: By synthesizing hierarchical In2O3/In2S3 microsphere heterostructures through hydrothermal synthesis and partial oxidation, gas sensors with excellent sensing performances towards triethylamine (TEA) were successfully fabricated.
JOURNAL OF MATERIOMICS
(2022)
Article
Nanoscience & Nanotechnology
Gang Li, Yuanyi Zhang, Qingfei Liang, Jinniu Zhang, Jia Liu, Yumeng Liu, Chunlan Wang, Jianzhi Gao, Hongbing Lu
Summary: In this study, Co3O4-TiO2 porous heterojunction nanosheets derived from BMOFs were constructed and used for ethanol sensing. The Co3O4-TiO2 nanosheets showed better sensing performances than TiO2 nanotablets, and the nanosheets with an optimal molar ratio of 12 mol% exhibited the highest response value and selectivity coefficient.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Inorganic & Nuclear
Huiming Ji, Lu Zhang, Rui Zhang
Summary: Multiferroic BiFeO3 particles with size of about 50 nm and good crystallinity were prepared via a simple sol-gel method and annealing. The VOCs sensing properties of BiFeO3 sensor were tested under both traditional thermal excitation and synergetic thermal-magnetic excitation, and the results showed improved performance under the latter condition. The effect of magnetic field on the sensor can be attributed to decreased defects on domain walls, excitation of gas molecules, and activation of surface-absorbed oxygen species.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Polymer Science
Humberto Alejandro Monreal Romero, Teresa Perez Pinon, Diana Sagarnaga, Raquel Duarte Rico, Alfredo Nevarez Rascon, Carlos Alberto Martinez Perez, Dagoberto Perez Pinon, Juan Pablo Flores de los Rios, Mario Sanchez Carrillo, Jose Guadalupe Chacon-Nava
Summary: In this study, titanium dioxide scaffolds were successfully synthesized using the sol-gel method. The scaffolds were formed by using titanium isopropoxide as a precursor and a polymeric network of galactopyranose as a template. The synthesized scaffolds have diameters of 50 nm and porosity ranging from 0.3 to 10 nm. XRD analysis confirmed the formation of crystalline phases in the TiO2 scaffold at 700 degrees C. The use of biological polymers as templates provides a low-cost and efficient approach for the synthesis of new materials.
Article
Chemistry, Multidisciplinary
Guo-Na Huo, Sha-Sha Zhang, Yue-Liu Li, Jia-Xing Li, Zhao Yue, Wei-Ping Huang, Shou-Min Zhang, Bao-Lin Zhu
Summary: Heterojunction structures formed by TiO2 nanotubes can enhance the photoelectric properties by preventing the recombination of electron-hole pairs. A CdS-TiO2NTs photoelectrochemical sensor was fabricated using the hydrothermal-impregnation method, showing good PEC performance under visible light.
Article
Engineering, Electrical & Electronic
O. F. Goktas, N. E. Koksal, O. Kaplan, A. Yildiz
Summary: The sol-gel method was used to fabricate Al-doped ZnO (AZO) thin films on p-Si substrates with smooth surfaces and highly oriented crystal structures. The analysis revealed that the AZO/Si heterojunctions exhibited nonideal diode behavior, with the 80 nm thick AZO layer demonstrating good rectifying properties.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Analytical
Yuting Wang, Tianqi Wang, Wenyuan Pei, Feng Li, Ying Yang, Hui Yu, Xiangting Dong
Summary: This study presents a new strategy to construct TiO2 @POMs@ alpha-Fe2O3 one-dimensional tandem heterojunctions materials through one-step coaxial electrospinning. Three series of TiO2 @POMs@ alpha-Fe2O3 core-middle-shell nanoribbons with different Keggin-type POMs were synthesized. Gas sensing performances of the nanoribbons were investigated, showing significantly improved sensitivity and selectivity to acetone. The enhancement can be attributed to the addition of POMs electron acceptors, the construction of tandem heterojunctions, and the one-dimensional nano-structure.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Analytical
Ang Li, Sikai Zhao, Jinzhou Bai, Shuling Gao, Dezhou Wei, Yanbai Shen, Zhenyu Yuan, Fanli Meng
Summary: By synthesizing SnO2@TiO2 nanorods, the sensing performance of titanium dioxide nanorods has been improved, exhibiting high response and stability towards hydrogen gas.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Multidisciplinary
Zhenzi Li, Decai Yang, Hongqi Chu, Liping Guo, Tao Chen, Yifan Mu, Xiangyi He, Xueyan Zhong, Baoxia Huang, Shiyu Zhang, Yue Gao, Yuxiu Wei, Shijie Wang, Wei Zhou
Summary: Interface engineering is an efficient strategy to improve photocatalytic performance. In this study, reduced graphene oxide/mesoporous titanium dioxide nanotube heterojunction assemblies (rGO/TiO2) were fabricated via a hydrothermal method. The heterojunction interface formed between rGO and TiO2 nanotubes acts as efficient charge transfer channels, which leads to enhanced photocatalytic performance. The rGO/TiO2 heterojunction assemblies exhibit extended photoresponse to visible light and a significantly higher photocatalytic hydrogen production rate compared to TiO2 nanotubes alone. This enhancement is attributed to effective charge transfer channels, spatial charge separation, and the electron acceptor properties of rGO, as well as the large surface area and sufficient surface active sites provided by the two-dimensional mesoporous nanosheets structure. This heterojunction assembly holds potential applications in energy fields.
Article
Materials Science, Ceramics
Kuo-Chin Hsu, Bo-Da Chen, Te-Hua Fang, Chao-Ming Hsu
Summary: In this study, tungsten oxide (WO3) nanofibers were prepared using electrospinning technology and combined with La0.8Pb0.2FeO3 (LPFO) perovskite materials to form a heterostructure film for gas sensing applications. The pure WO3 nanofiber gas sensor showed excellent sensing for nitrogen dioxide (NO2) and hydrogen sulfide (H2S), while the WO3/LPFO heterostructure film gas sensor exhibited a high response to H2S but suppressed response to NO2. The WO3/LPFO heterostructure film gas sensor greatly improved gas selectivity, with specific sensitivity towards H2S gas.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Dinh-Quan Doan, Te-Hua Fang, Thi-Bao-Tien Tran
Summary: The tensile deformation behaviors of Cu80Ta20/Cu20Ta80 amorphous/amorphous nanomultilayers (AANMs) were studied using molecular dynamics simulation. The results show that the tensile strength of AANMs is influenced by layer thickness, with thinner layers demonstrating the Hall-Petch relationship and thicker layers exhibiting the inverse Hall-Petch effect. Additionally, the tensile strength increases with higher strain rates and lower temperatures.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Materials Science, Multidisciplinary
Yu-Sheng Lu, Te-Hua Fang
Summary: The aspect ratio has a significant effect on buckling instability, with the critical buckling stress decreasing as the aspect ratio increases. Molecular dynamics simulation shows that the NiCoCr medium-entropy alloy nanotubes exhibit instability when the aspect ratio reaches 10. Single-crystalline specimens have higher compressive strength compared to polycrystalline specimens.
MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING
(2023)
Article
Chemistry, Physical
Thi-Xuyen Bui, Te-Hua Fang, Chun-I. Lee
Summary: The effects of different inclusion types, inclusion radius, and strain rates on the mechanical properties of NiFeCr alloy were investigated through molecular dynamic simulation. It was found that increasing strain rates led to an increase in tensile strength, strain energy, and dislocation densities. Samples without inclusions had higher tensile strength, strain energy, and dislocation densities compared to samples with inclusions. The inclusion radius had a complex effect, with decreasing Young's modulus for all inclusion types. The phase transformations and dislocation lengths were larger in samples without inclusions, and Stair-rod and Shockley partial dislocations were dominant in all samples.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Hoang-Giang Nguyen, Te-Hua Fang, Dinh-Quan Doan
Summary: The impact of temperature and strain rates on the cyclic plasticity of AlCrCuFeNi high entropy alloy (HEA) was investigated using molecular dynamics (MD) simulations. The results revealed that interactions between partial dislocations in the HEA caused lattice disorders, which minimized the Bauschinger effect. The study also highlighted the influence of temperature, strain rates, and grain boundaries on lattice disorder and provided new insights into the deformation mechanism of AlCrCuFeNi HEA.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Thi-Bao-Tien Tran, Te-Hua Fang, Dinh-Quan Doan
Summary: Nowadays, stacking 2D van der Waals heterostructures, such as GaSe and graphene, provides more opportunities for designing optoelectronic devices. We created GaSe/Graphene heterostructures with various defect lines and studied their mechanical properties using molecular dynamics simulations. We found that the mechanical properties of GaSe/Graphene heterostructures can be greatly enhanced through defect engineering, and the potential applications include stretchable electronics and supercapacitor devices.
MECHANICS OF MATERIALS
(2023)
Article
Instruments & Instrumentation
I-Po Tai, Kuo-Chin Hsu, I-Tseng Tang, Te-Hua Fang, Tsung-Chieh Cheng, Wei-Hao Wang, Mustufa Ali Ansari, Chi-Jen Shih
Summary: The degradation characteristics of methylene blue and methyl orange after being mixed with zinc oxide (ZnO) and magnesium oxide (MgO) powders are discussed in this paper. Five types of ZnO/MgO mixed powders with different molar ratios and two different catalyst concentrations were used in the experiment. The results showed that the powder with a molar ratio of 0.9:0.1 had a high degradation efficiency when the catalyst concentration was 0.15 g/L. The degradation of methyl orange was completed within 6 h, and the degradation of methylene orange reached 80% within 2 h.
SENSORS AND MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Man-Ping Chang, Te-Hua Fang, Ting-Yu Zhu, Jau-Wen Lin
Summary: In this study, the mechanical properties and deformation mechanisms of CoCrFeNiMnx high entropy alloys (HEAs) were investigated through molecular dynamics (MD) simulation. Uniaxial tensile tests were conducted at different temperatures and manganese compositions, and a circular defect was created to study the damage tolerance of these HEAs. The results showed that the CoCrFeNiMn HEA exhibited a strong temperature dependence, with the ultimate tensile strength decreasing as the temperature increased. The early stage deformation was dominated by dislocation slip, while grain boundary glide played a major role in the later stage deformation. The higher manganese content led to the formation of hexagonal close-packed (HCP) and amorphous phases, which reduced the strength of CoCrFeNiMnx HEAs. Among the compositions tested, Mn5 HEA showed the best damage tolerance.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Automation & Control Systems
Duy-Khanh Nguyen, Te-Hua Fang, Yu-Cheng Fan, Ching-Chien Huang, Chu-Xun Lin
Summary: This paper investigates the influence of control parameters of a pneumatic valve-controlled dispenser on the positional accuracy and reliability of liquid droplets, and finds that flow rate has the most impact on both criteria. Additionally, using a small needle can significantly improve the quality.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Chemistry, Physical
Thi-Nhai Vu, Van-Trung Pham, Te-Hua Fang
Summary: The deformation properties and mechanical behavior of the lamellar twined Al0.3CoCrFeNi high-entropy alloys (HEA) sample were studied using molecular dynamics (MD) simulations. The results showed different mechanical characteristics under different twin inclination angles and strain rates. It was also found that the flow stress, ultimate strength, and Young's modulus increased with increasing strain rate and decreasing temperature.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Chih-Chieh Mo, Chih-Cheng Kuan, Yung-Hsiang Wang, Yu-Sheng Lu, Tsung-Wei Chang, Wei-Yu Liao, Te-Hua Fang, Mi-Ching Tsai, Ching-Chien Huang
Summary: This study demonstrates an innovative and effective method for recycling waste NdFeB magnets by preparing recycled sintered NdFeB magnets on a large scale. By adding NdCoGa alloy to waste wind turbine NdFeB magnets, the proposed process restores the magnetic properties of the recycled magnets to the level of the original waste magnets, enhances their corrosion resistance, and reduces the cost of magnet remanufacturing.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Biochemistry & Molecular Biology
Thi-Thuy Binh Ngo, Van-Thuc Nguyen, Te-Hua Fang
Summary: This study uses molecular dynamics (MD) simulation to investigate the mechanical characteristics and deformation behavior of Cu material under nanoscratching using a diamond tooltip on the workpiece. The effects of scratching velocity, scratching depth, workpiece temperature, and grain size on various parameters are studied.
JOURNAL OF MOLECULAR MODELING
(2023)
Article
Materials Science, Multidisciplinary
Hoang-Giang Nguyen, Te-Hua Fang
Summary: The mechanical behavior of AlCuNiTi alloy during orthogonal micro-cutting is investigated using molecular dynamics. The results show that the sample temperature is higher during complex-dimensional vibration cutting (CDVC) compared to classical cutting, and the cutting force decreases with increasing vibration frequency and amplitude ratio.
MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING
(2023)
Article
Engineering, Mechanical
Tan-Tai Do, Te-Hua Fang
Summary: This study employed molecular dynamics simulations to investigate the substrate removal methods in beta-SiC polishing. The vibration-coupled rolling motion was found to be the most effective, while the sliding motion showed significant improvement in atom removal. Additionally, increasing the number of asperities and the amplitude of vibration led to improved surface roughness.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Chemistry, Physical
Hoang-Giang Nguyen, Te-Hua Fang
Summary: The deformation mechanism and evolutionary patterns of mechanical behavior in the Alx(CuCrFeNi)1_x high-entropy alloy during nanoindentation are investigated using molecular dynamics. The study reveals that the mechanical attributes and structural changes are influenced by temperature, grain size, and alloy composition. An increase in the Al percentage leads to a reduction in the indentation force, and the concentration of aluminum and larger grain sizes enhance the overall ductility of the alloys. The movement of mobile prismatic dislocations significantly contributes to the deformation process.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
J. Zamora, T. Bautista, N. S. Portillo-Velez, A. Reyes-Montero, H. Pfeiffer, F. Sanchez-Ochoa, H. A. Lara-Garcia
Summary: Experimental and DFT studies were conducted on the structural, magnetic, and optical properties of RFeO3 perovskites. The perovskites exhibited an orthorhombic crystal structure and weak ferromagnetic behavior. They were confirmed to be semiconductors with a bandgap of approximately 2.1 eV.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xianxiang Lv, Jing Jin, Weiguang Yang
Summary: By depositing TiN and TiO2 surface layers on AlSi films, the electrochemical performance of silicon-based anodes can be significantly improved, suppressing volume expansion and promoting the formation of a stable SEI layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Sharafat Ali, Haider Ali, Syedul Hasnain Bakhtiar, Sajjad Ali, Muhammad Zahid, Ahmed Ismail, Pir Muhammad Ismail, Amir Zada, Imran Khan, Huahai Shen, Rizwan Ullah, Habib Khan, Mohamed Bououdina, Xiaoqiang Wu, Fazal Raziq, Liang Qiao
Summary: The construction and optimization of redox-heterojunctions using a bifunctional phosphate as an electron-bridge demonstrated significant improvements in photo catalytic activity, including enhanced dispersion, reduced interfacial migration resistance, and increased abundance of active-sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ren-Ni Luan, Na Xu, Chao-Ran Li, Zhi-Jie Zhang, Yu-Sheng Zhang, Jun Nan, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: Extensive research has revealed that oxygen evolution reaction (OER) in alkaline conditions involves dynamic surface restructuring. The development and design of sulfide/oxide pre-catalysts can reasonably adjust the composition and structure after surface reconstruction, which is crucial for OER. This study utilized a simple two-step hydrothermal method to achieve in situ S leaching and doping, inducing the composition change and structure reconstruction of CoFe oxides. The transformed FeOOH and CoOOH exhibited excellent OER activity and could be easily mass-produced using low-cost iron based materials and simple methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jun'an Lai, Daofu Wu, Peng He, Kang An, Yijia Wang, Peng Feng, WeiWei Chen, Zixian Wang, Linfeng Guo, Xiaosheng Tang
Summary: Zero-dimensional organic-inorganic metal halides (OMHs) are gaining attention in the fabrication of light-emitting diodes due to their broad emission band and high photoluminescence quantum yield. This work synthesized a zero-dimensional organic tetraphenylphosphonium bismuth chloride (TBC) that showed efficient blue light emission, with the emission mechanism attributed to the transition of Bi3+ ions. White light-emitting diodes (WLEDs) were fabricated using TBC, along with green-emitting and red-emitting single crystals, achieving single-component white emissions. These findings demonstrate the different emission mechanism of ns2 ions-based OMHs and highlight the potential of bismuth-based OMHs in WLEDs applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xuewei Liang, Yunhai Su, Taisen Yang, Zhiyong Dai, Yingdi Wang, Xingping Yong
Summary: The revolutionary design concept of high-entropy alloys has brought new opportunities and challenges to the development of advanced metal materials. In this work, AlCrCuFe2NiTix high-entropy flux cored wires were prepared by combining the design idea of a high-entropy alloy with the characteristics of flux cored wire. AlCr-CuFe2NiTix high-entropy surfacing alloys were prepared using gas metal arc welding technology. The wear properties of the alloys were analyzed, and the phase composition, microstructure, strengthening mechanism, and wear mechanism were discussed. The results show that the alloys exhibit a dendritic microstructure with BCC/B2 + FCC phases. Increasing Ti content leads to the precipitation of Laves phase. The alloys show improved microhardness and wear resistance due to the precipitation of coherent B2 and Laves phases. However, excessive Ti addition results in the increase of Laves phase and reduced wear resistance of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
M. Vadivel, M. Senthil Pandian, P. Ramasamy, Qiang Jing, Bo Liu
Summary: This work presents the enhanced photocatalytic and electrochemical performance of g-C3N4 assisted PAA on CoFe2O4 ternary nanocomposites. The incorporation of PAA and g-C3N4 improves the separation efficiency of photogenerated charge carriers, resulting in superior photocatalytic degradation and high specific capacitance values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Vibhu T. Sivanandan, Ramany Revathy, Arun S. Prasad
Summary: In this study, pure and doped cobalt ferrite nanoparticles were prepared using the sol-gel auto-combustion method with the aid of lemon juice as eco-fuel. The crystal structure, lattice parameter, crystallite size, microstrain, optical parameters, and room temperature magnetic properties of the samples were analyzed. The effect of doping on the magnetic properties was also investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qing Guo, Bowen Zhang, Benzhe Sun, Yang Qi
Summary: This study prepared ZnO films with various nonpolar preferred orientations using conventional chemical bath deposition method and characterized their growth process and mechanism. It was found that the type and concentration of nitrate could control the preferred orientation and surface roughness of ZnO films. Additionally, ZnO films with different preferred orientations exhibited different optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Chong Zhang, Yan Liu, Zhaoyan Wang, Hang Yang
Summary: In this study, six bimetallic FeCo particles were synthesized via the hydrothermal method at different Fe:Co ratios. The Fe:Co ratio not only modulates the composition of the particles but also influences their structure and magnetic properties. The FeCo alloys showed a transformation from an Fe-based structure to a Co-based structure with increasing Co content. The Fe:Co ratio of 1:1 and 3:1 resulted in particles with the highest and lowest saturation magnetization, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jianning Zhang, Jing Li, Yiren Wang, Xiaodong Mao, Yong Jiang
Summary: We conducted a study on the formation of ultra-fine Y-Ti-Ta-O nano-oxides in Ta+B micro-alloyed 13CrWTi-ODS alloys using electron microscopy and first-principles calculations. The Y-Ti-Ta-O nano-oxides were found to be mainly Y2(Ti,Ta)2O7, with an average size of 7 nm and a number density of 6.8 x 1023 m-3. Excess boron was found to enhance the adhesion of some low-sigma grain boundaries but weaken the Fe/Y2Ti2O7 interface, while excess tantalum enhanced the Fe/Y2Ti2O7 interface but caused serious degradation of grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Yirong Fang, Pei Cheng, Hang Yuan, Hao Zhao, Lishu Zhang
Summary: A new composite system of nitrogen-doped reduced graphene oxide and black phosphorus quantum dots has been developed for tumor therapy, showing improved electrochemical properties and stability. The system generates hydrogen peroxide and hydroxyl radical to effectively kill tumor cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xiufang Qin, Yuanli Ma, Hui Zhang, Ting Zhang, Fang Wang, Xiaohong Xu
Summary: The structure and magnetism of cobalt ferrites after Mn2+-Tb3+ co-doping were studied. Co-doped samples exhibited cubic spinel structure and spherical shape of ferrite nanoparticles. The redistribution of Co2+ and Fe3+ ions between octahedral and tetrahedral sites was observed due to Mn2+-Tb3+ co-doping. The coercivity and magnetization saturation of co-doped samples were significantly improved, leading to a maximum energy product that is 190% higher than that of the un-doped sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ho Yeon Lee, Wonjong Yu, Yoon Ho Lee
Summary: Recently, there has been an increasing interest in developing ultra-fine nanostructured electrodes with extensive reaction areas to enhance the performance and low-temperature operation of solid oxide fuel cells. The use of a refined approach involving co-sputtering metal alloys and oxide targets has demonstrated the feasibility of nano-columnar structures in perovskite-based electrodes, expanding the temperature range of thin film electrodes. This study systematically examines the effects of chamber pressure control in the co-sputtering process and identifies the intricate relationship between sputtering pressure and film structure. By fine-tuning the columnar growth in the electrode, significant improvements in performance and thermo-mechanical properties were achieved, resulting in high-performance all-sputtered solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qianyun Bai, Xiaoxiao Yan, Da Liu, Kang Xiang, Xin Tu, Yanhui Guo, Renbing Wu
Summary: This study proposes a simple method to develop a non-precious transition metal-based electrocatalyst with high catalytic activity and robustness for the hydrogen evolution reaction. The as-synthesized electrode exhibits a low overpotential and high current density, indicating its potential in energy conversion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
