Article
Materials Science, Ceramics
Xueying Wang, Huaiwu Zhang, Liang Shi, Jie Li, Lichuan Jin, Liu Cheng, Lijun Jia, Dainan Zhang, Yulong Liao
Summary: The doping material LMZBS glass can promote the densification of the microstructure of NiCuZn ferrite and improve its magnetic properties.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Deng-ming Wu, Xiao-pan Liu, Peng-zhao Gao, Luo-ting He, Jian-wei Li
Summary: In this study, NixCu0.2ZnyFe1.98O4 ferrites with different Ni2+ concentrations were prepared via solid-state reaction, and the influence of Ni2+ concentration on the composition, microstructure, magnetic properties, and DC-bias superposition characteristics of the ferrites was investigated. The results showed that increasing Ni2+ concentration resulted in improved magnetic properties, and the specimen with a Ni2+ concentration of 0.50 exhibited the best DC superposition characteristics.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Yang Wang, Changlong Yang, Qingjiang Kong, Xinglin Wu, Zhongrui Zhang
Summary: This work reports the synthesis of (Ni0.2Cu0.2Zn0.6O)(1.03)(Fe2O3)(0.97) ferrites and the use of LMZBS-Bi2O3 as a dopant to regulate the microstructure and magnetic properties. The crystal phase and microstructure of the doped ferrites were characterized by XRD and SEM, respectively. The magnetic properties including Ms, Hc, Q-factor, permeability, and power loss were investigated and analyzed. The results showed that the doped ferrites exhibited a uniform and dense microstructure, with the highest Ms, Q-factor, magnetic permeability, as well as the lowest Hc and Pcv. Overall, the LMZBS-Bi2O3 doped NiCuZn ferrites showed outstanding microstructure and magnetic properties, making them promising for various applications.
MATERIALS RESEARCH EXPRESS
(2023)
Article
Materials Science, Ceramics
Haoran Peng, Peijie Yang, Pao Yang, Hongbin Qi
Summary: Multicomponent co-doping is used to balance the magnetic properties of ferrite ceramics. In this study, novel (Ni,Cr,Zr)-co-doped M-type barium hexaferrites were synthesized. The sintering behavior and densification temperature of the ceramics were found to be similar regardless of the composition x, and all the fabricated ceramics exhibited pure-phase M-type barium ferrite.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Inorganic & Nuclear
Chuan Chen, Sen Qian, Qiang Zhang, Ximin Zhang, Tianhao Yao
Summary: The fabrication of nickel-copper-zinc (NiCuZn) ferrites was achieved through a blowing-combustion method, and the grain size and morphology were controlled by adjusting the sintering temperature. The study systematically investigated the effect of sintering temperatures on the structural evolution and magnetic properties of NiCuZn ferrites. It was found that the Zn elemental content strongly depended on the sintering temperature and evaporation occurred at 800 degrees C, which significantly affected the magnetic properties of NiCuZn ferrites.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Muhammad Uzair, Shamsa Kanwal, Muhammad Iftikhar Khan, Wajeehah Shahid, Badriah S. Almutairi, Muhammad Amin, Nawal Ansar, Samiah Shahid, Jeong Ryeol Choi
Summary: Manganese-doped bismuth ferrites were synthesized using the coprecipitation method with the green extract Azadirachta indica. The incorporation of manganese effectively addressed the issue of increased leakage current in the ferrite material. The study analyzed the structural, dielectric, and optical properties of the materials, finding that 2% manganese doping resulted in optimal performance.
Article
Engineering, Electrical & Electronic
Anjana Sharma, Khalid Mujasam Batoo, Omar M. Aldossary, Shilpi Jindal, Nupur Aggarwal, Gagan Kumar
Summary: Copper-substituted Mn-Zn magnetic nano ferrites were successfully fabricated using a solution combustion method, and the effects of dopant concentration on the properties of the samples were studied. The research showed that doping with Cu led to a reduction in bandgap energy, an increase in conductivity, and improvement in its application for electromagnetic devices.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Ceramics
Junbo Chen, Hua Su, Yulan Jing, Yuanxun Li, Xiaoli Tang, Qihai Lu
Summary: Two groups of low-temperature-fired Ni0.6-xZn0.4CuxFe1.98O4 samples with different Bi2O3 doping levels were studied for their crystal phase composition, microstructure, and soft magnetic properties. Group A samples showed better overall performance than Group B samples, but were more sensitive to the Cu content. Therefore, for better performance, samples with x = 0.275 in Group A were recommended, while samples with x = 0.25 in Group B were more suitable for improved robustness of ferrite composition and process.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Yan Yang, Jie Li, Huaiwu Zhang, Jun Li, Fang Xu, Gang Wang, Feng Gao, Haokai Su
Summary: In this study, Ni0.29Cu0.18Zn0.53NbxFe2-xO4 (x = 0.00-0.05) ferrites with high saturation magnetization, appropriate initial permeability, high cut-off frequency and low ferromagnetic resonance linewidth were synthesized by low-temperature firing. The results showed that Nb5+ ion substitution played a significant role in producing compact and uniform microstructures, enhancing the magnetic and gyromagnetic properties. The enhanced properties include high initial permeability, saturation magnetization and low ferromagnetic resonance linewidth.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Xianfu Luo, Yilong Ma, Bin Shao, Chunhong Li, Kejian Li, Donglin Guo, Dengming Chen, Hongqing Zhou
Summary: In this study, (Ni0.2Cu0.2Zn0.6O)(1.02)(Fe2O3)(0.98) based ferrites with combined B2O3-WO3-Co2O3 dopings were synthesized and used to fabricate high-performance NiCuZn green tapes and multilayer chip inductors. The results showed that appropriate Co2O3 doping can refine the crystalline grains, reduce the permeability, and increase the Q factor of the ferrites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Inorganic & Nuclear
V. Balasubramani, V. Mowlika, A. Sivakumar, Njod Al Sdran, F. Maiz, Mohd Shkir
Summary: Research on tuning the magnetic properties of divalent ferrite materials has its own significance due to their wide applications in modern electronic and magnetic devices. This study focuses on the sono-chemical synthesis and characterization of pure and Sn doped CoFe2O4 nanoparticles (NPs). The obtained results reveal a stable cubic crystallographic structure, stable hard ferromagnetic state, and higher coercivity in Sn doped CoFe2O4 NPs compared to pure CoFe2O4. These findings suggest the potential application of Sn doped CoFe2O4 NPs in magnetic data storage.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Materials Science, Ceramics
Xinran Ji, Chang Shen, Ye Zhao, Hui Zheng, Qiong Wu, Qiangyuan Zhang, Liang Zheng, Peng Zheng, Yang Zhang
Summary: The electromagnetic properties of NiCuZn ferrites were enhanced by doping with Bi2O3, resulting in a reduction of the sintering temperature and making it suitable for LTCC technology.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
A. M. Adam, A. Elshafaie, E. M. M. Ibrahim
Summary: Hexagonal Sr1_xDyxFe12O19 (x = 0.0-0.1) samples were prepared by high-energy ball milling technique, and the effect of Dy doping on their structural and magnetic properties was studied. XRD analysis confirmed the formation of single polycrystalline phase of SrFe12O19. Dy doping resulted in significant improvement in saturation magnetization (Ms) and intrinsic coercivity (Hc) at room temperature, and the samples exhibited high coercivity, making them potential candidates for high frequency applications.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Materials Science, Ceramics
Qiang Li, Jun Wang, Huizhen Yao
Summary: The performance of low-temperature co-fired ceramic (LTCC) materials was improved by doping with Nb2O5, resulting in decreased Delta H and increased mu' and M-s values. These improvements make the material suitable for gyro magnetic devices and antenna substrates in 5G technology.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Chuan Chen, Sen Qian, Qiang Zhang, Ximin Zhang, Tianhao Yao
Summary: Highly porous NiCuZn spinel ferrite hierarchies with excellent magnetic properties were prepared through a modified solution combustion method, showing potential for large-scale applications and high-performance soft magnets in electrical equipment.
Article
Materials Science, Multidisciplinary
Y. J. Xu, S. Y. Song, C. X. Li, B. Hong, D. S. Shi, J. C. Xu, Y. B. Han, H. X. Jin, D. F. Jin, X. L. Peng, J. Gong, H. L. Ge, X. Q. Wang
Summary: Porous perovskite lanthanum ferrites powders were synthesized under different pH values and showed good performance in magnetic properties, photocatalytic activity, and gas-sensing performance. The LF-1 sample prepared at pH = 1 exhibited the highest removal rate of MB, the largest saturation magnetization, and the best gas response to ethanol.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
L. Wang, S. Y. Song, B. Hong, J. C. Xu, Y. B. Han, H. X. Jin, D. F. Jin, J. Li, Y. T. Yang, X. L. Peng, H. L. Ge, X. Q. Wang
Summary: Mesoporous Co3O4 nanowires were synthesized using the nanocasting method and separated into dispersed and bundled nanowires. The microstructures and morphology significantly affect toluene gas sensing performance, with mesoporous structures exhibiting higher sensitivities and more stability. The gas-sensing mechanism involves surface oxygen and toluene gas adsorption, resulting in excellent performance in both samples.
MATERIALS RESEARCH BULLETIN
(2021)
Article
Nanoscience & Nanotechnology
J. Y. Niu, L. Wang, B. Hong, J. C. Xu, Y. B. Han, H. X. Jin, Y. X. Zeng, X. L. Peng, H. L. Ge, X. Q. Wang
Summary: High surface area nickel oxide nanowires (NiO NWs), Fe-doped NiO NWs and alpha-Fe2O3/Fe-doped NiO NWs were synthesized with nanocasting pathway and characterized with various techniques. Fe-dopant and alpha-Fe2O3-loading improved gas-sensing performance of the sensors, with alpha-Fe2O3/Fe-doped NiO NWs sensors showing the best response to ethanol gas due to the formation of heterogeneous contact at the interface. The sensors with uniform mesoporous structures exhibited enhanced gas-sensing properties.
Article
Chemistry, Physical
Jiasong Chang, Tongkang Zhan, Xiaoling Peng, Jing Li, Yanting Yang, Jingcai Xu, Bo Hong, Dingfeng Jin, Hongxiao Jin, Xinqing Wang, Hongliang Ge
Summary: Soft magnetic composites of amorphous FeSiB/Ni-Zn ferrite were fabricated with significantly improved permeability and core loss by applying an external magnetic field during compression molding. The parallel orientation of the magnetic field during preparation process optimized the microstructure and magnetic circuit, leading to enhanced permeability, core loss, and DC-bias performance compared to perpendicular orientation and samples without magnetic field treatment. Utilizing a magnetic field during preparation process can further improve the soft magnetic performances of SMCs.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Electrical & Electronic
Minghui Ge, Xiaoling Peng, Jing Li, Tristan Ellis, Yanting Yang, Jingcai Xu, Bo Hong, Dingfeng Jin, Hongxiao Jin, Xinqing Wang, Hongliang Ge
Summary: Fe3N/Fe core-shell particles were prepared by gas nitriding and then pressed into Fe3N/Fe soft magnetic composites. The results showed that the saturation magnetization decreased and the remanence and coercivity increased with the increase of Fe3N phase content. The 5-h nitridated sample exhibited the best frequency stability.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Materials Science, Multidisciplinary
Zhao Zhang, Jiasong Chang, Xiaoling Peng, Jing Li, Yanting Yang, Jingcai Xu, Bo Hong, Dingfeng Jin, Hongxiao Jin, Xinqing Wang, Hongliang Ge
Summary: In this study, flaky FeSiB/Al2O3 soft magnetic composites (SMCs) were prepared with the parallel or perpendicular orientation of an external magnetic field. It was found that anisotropic structures were formed in the FeSiB/Al2O3 SMCs, and the parallel orientation of FeSiB particles in the working magnetic circuit significantly optimized the DC and AC magnetic properties.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Physical
Donglin Li, Junfeng Lu, Xuanji Zhang, Xiaolin Peng, Jing Li, Yanting Yang, Bo Hong, Xinqing Wang, Dingfeng Jin, Hongxiao Jin
Summary: Gas sensors based on hybrid materials of reduced graphene oxide/metal oxide semiconductors improve sensor performance by creating a reversible p-n transition behavior. This study demonstrated the synthesis of a np-type heterojunction structure by anchoring reduced graphene oxide on the surface of zinc oxide rods. The reversible p-n transition was controlled and designed based on a binary (T-C) transition diagram created using familiar phase diagrams.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Materials Science, Multidisciplinary
Z. F. Gu, Y. J. Xu, B. Hong, J. C. Xu, Y. B. Han, H. X. Jin, D. F. Jin, X. L. Peng, J. Gong, H. L. Ge, X. Q. Wang
Summary: In this study, g-C3N4/LaFeO3 nanocomposites were successfully synthesized with well-dispersed LaFeO3 nanoparticles on g-C3N4 nanosheets. The g-C3N4/LaFeO3 nanocomposites exhibited excellent photocatalytic activity for the degradation of tetracycline hydrochloride (TC-HCl) antibiotics under visible light irradiation, with a degradation efficiency 13.6-fold and 2.6-fold higher than pristine LaFeO3 nanoparticles and g-C3N4 nanosheets, respectively. The p-n heterojunctions of g-C3N4/LaFeO3 effectively separated photogenerated electrons and holes, leading to the enhanced photocatalytic activity. Moreover, the dominant radical during the photodegradation process was found to be center dot O-2(-) according to active species trapping experiments.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Polymer Science
WanTong Liu, Tianshou Yu, Zhifeng Dai, Ming Zhang, Hongxiao Jin, Hongliang Ge, Xinqing Wang, Dingfeng Jin, Hui Lou
Summary: This study focuses on the utilization of waste lithium-manganese batteries to develop efficient catalysts for the degradation of formaldehyde. The findings suggest that the continuous doping of Li+ and the conversion of Mn(IV) to Mn(III) during the discharge process contribute to the enhancement of the catalyst's degradation efficiency. Additionally, the increase in discharge level promotes the catalytic activity of the catalyst for formaldehyde degradation. The results provide an attractive approach for converting waste lithium battery electrode materials into formaldehyde degradation catalysts to improve indoor air quality.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Junfeng Lu, Donglin Li, Xianjia Chen, Xiaolin Peng, Jing Li, Yanting Yang, Bo Hong, Xinqing Wang, Dingfeng Jin, Hongxiao Jin
Summary: In this study, room temperature NO2 sensors based on ZnO/rGO nanocomposites were successfully fabricated using a facile hydrothermal method. The sensors showed p-type sensing behavior towards NO2 and the content of rGO had a significant impact on the sensing properties. The ZnO NPs-1% rGO sensor exhibited a high response to 10 ppm NO2 with a response/recovery time of 198/144 s, indicating its potential for practical applications.
JOURNAL OF NANOPARTICLE RESEARCH
(2022)
Article
Chemistry, Physical
Wanjiao Li, Jing Li, Xiaoling Peng, Jiaxin Xu, Yanting Yang, Dingfeng Jin, Hongxiao Jin, Xinqing Wang, Hongliang Ge
Summary: Single-phase yttrium iron garnet (YIG) ferrite was synthesized by sol-gel method and used as the insulating layer for Fe/YIG soft magnetic composites (SMCs). The Fe powders were evenly coated with the YIG ferrite. The study investigated the effect of YIG content on the soft magnetic properties of the Fe/YIG SMCs and found that the core loss decreased initially and then increased with increasing YIG content. Moreover, the Fe/YIG SMCs exhibited improved permeability compared to pure Fe when the YIG content was between 1.0 wt% and 3.0 wt%.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Donglin Li, Junfeng Lu, Xuanji Zhang, Dingfeng Jin, Hongxiao Jin
Summary: In this study, ZnO nanoparticles were loaded with 0.1% to 4% rGO using a hydrothermal method and evaluated as NO2 gas chemiresistors. The doping ratio was found to affect the sensing properties, with the conductivity type of ZnO/rGO changing from n-type to mixed n/p-type and finally to p-type. Different sensing regions exhibited different sensing characteristics, and the p-n heterojunction ratio played a key role in the optimal response condition.
Article
Nanoscience & Nanotechnology
Yixuan Huang, Donglin Li, Wenxiang Chai, Dingfeng Jin, Hongxiao Jin
Summary: To enhance the gas sensing property of MoS2 nanoflowers, fluorine was doped using a hydrothermal method. The fluorine-doped samples showed shorter recovery time and increased sensitivity compared to pure MoS2. This study contributes to the development of new molybdenum sulfide-based gas sensor.
Article
Chemistry, Multidisciplinary
Ke Huang, Junfeng Lu, Donglin Li, Xianjia Chen, Dingfeng Jin, Hongxiao Jin
Summary: In order to improve the gas sensitivity of NO(2) room-temperature sensors based on reduced oxide graphene (rGO), ternary hybrids were synthesized by combining different contents of rGO, ZnO rods, and noble metal nanoparticles (Au or Ag NPs) to utilize the advantages of each component. The presence of rGO in the ZnO-rod/rGO hybrid facilitated the diffusion of gas molecules by preventing rGO stacking and creating a porous structure. Among the tested hybrids, Ag@ZnO rods-2% rGO and Au@ZnO rods-2% rGO exhibited better gas-sensing properties for low concentrations of NO(2), with higher response and shorter recovery time.
Article
Chemistry, Physical
Donglin Li, Junfeng Lu, Xuanji Zhang, Xiaolin Peng, Jing Li, Yanting Yang, Bo Hong, Xinqing Wang, Dingfeng Jin, Hongxiao Jin
Summary: Gas sensors based on reduced graphene oxide/metal oxide semiconductors improve sensor performance. The combination of reduced graphene oxide and ZnO rods forms an np-type heterojunction structure for a nitrogen dioxide sensor. The composites exhibit reversible sensing behavior induced by changes in gas concentration and temperature. The study provides potential applications for efficient NO2 detection.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
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)