Article
Energy & Fuels
Zihao Wang, Kai Zhao, Lei Wang, Miao Tian, Yuesheng Sun, Chunxiao Wang, Xiaolin Sun, Jingquan Liu
Summary: Researchers have successfully constructed hierarchical CuCo2O4@NiMn-layered double hydroxides (CCO@NM-LDH) core-shell heterostructures, which provide a large specific surface area and numerous active sites, improving the capacitive performance of the material. By modulating the reaction time of NiMn-LDH, the CCO@NM-LDH-2 electrode exhibits the best capacitance and retention of capacitance, and the assembled CCO@NM-LDH-2//AC asymmetric supercapacitor (ASC) shows high energy density and power density.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Analytical
Jiaqi Zhang, Jin Li
Summary: In this study, ZnO/NiO@NC electrode material was prepared using polyvinylpyrrolidone (PVP) as a structural guide and carbon source, and annealed under an N2 atmosphere to obtain an oxygen-vacancy-rich ZnO/NiO@N-doped carbon shell (ZnO/NiO@NC). The ZnO/NiO@NC electrode exhibited the highest specific capacitance (860.00 F/g), longer charge/discharge time, and lower impedance compared to other materials at a current density of 0.5 A/g. The excellent electrochemical performance can be attributed to the formation of an effective p-n heterostructure, surface oxygen vacancies, and a rich mesoporous structure, as well as the excellent electrical conductivity of the N-doped carbon shell.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Physical
Dawei Lai, Zengrui Wang, Zhenhua Wang, Feng Gao, Qingyi Lu
Summary: The study presents a cost-efficient strategy for fabricating bifunctional phosphorus-doped CoO core@shell microspheres using solvothermal technique, calcination and up-stream gas method, which show great performance in both energy conversion and storage. The resulting P-CoO core@shell structures possess high specific surface area, enhanced conductivity and additional active sites, demonstrating excellent electrocatalytic performances for hydrogen evolution reaction and improved supercapacitive properties for energy storage. This strategy provides a new contribution to develop multifunctional electrochemical-active materials for energy conversion and storage.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Physical
Xiaoyu Huang, Yuan Yang, Jialu Zhao, Yin Huang, Xiuhua Wang
Summary: In this study, a dual-core layer hollow structure Co3S4@NiCo2S4 nanocages supercapacitor electrode material was successfully synthesized using an appropriate ion-exchange strategy and subsequent vulcanization treatment of MOFs. The Co3S4@NiCo2S4 electrode exhibited a specific capacitance of 1202 F g-1 at 1 A g-1 and retained 80% of its initial capacity at 10 A g-1. The integrated Co3S4@NiCo2S4//AC asymmetric supercapacitor achieved an energy density of 58 Wh kg-1 at a power density of 750 W kg-1. It also showed a capacitance retention of 81.8% after 10,000 galvanostatic charge-discharge cycles. The individual nanostructure and excellent electrochemical properties of Co3S4@NiCo2S4 nanocages provide a rational strategy for developing high-energy-density supercapacitor electrode materials based on MOFs derivatives.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Chunli Guo, Yuyu Zhang, Minshuai Yin, Jianhui Shi, Weike Zhang, Xiaomin Wang, Yucheng Wu, Jianchao Ma, Du Yuan, Chuankun Jia
Summary: A novel Co3O4@Co3S4 core-shell neuroid network electrode has been designed, which offers excellent electrochemical performance while maintaining high cycle stability. The electrode is able to retain its structure effectively during cycling and has a high specific capacity.
JOURNAL OF POWER SOURCES
(2021)
Article
Energy & Fuels
Xian Huang, Rui Yang, Huiqun Yin, Yiyan Mo, Xiuyan Shi, Wangsheng Li, Shuge Dai, Aimiao Qin, Kaiyou Zhang
Summary: In this study, a composite material of CuO nanowires and NiCo-LDH nanoplates was fabricated using wet chemistry and hydrothermal methods, resulting in a three-dimensional core-shell structure with high specific surface area. The composite exhibited excellent electrochemical performance and bending performance.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Multidisciplinary Sciences
Liang Chang, Shaoqin Chen, Yuhuan Fei, Dario J. Stacchiola, Yun Hang Hu
Summary: This study achieves a high areal capacitance for supercapacitor electrodes through the synthesis of a new material, providing strategic insights for the rational design of these electrodes.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Energy & Fuels
Abhijith R. Nair, B. Thanigai Vetrikarasan, Surendra K. Shinde, Dae-Young Kim, Shilpa N. Sawant, Ajay D. Jagadale
Summary: This study presents a facile method for the fabrication of CuO@CoV LDH core-shell structure, which shows potential applications in supercapacitors and electrocatalysis with high specific capacitance, high conductivity, and lower overpotential.
Article
Energy & Fuels
Liying Wang, Hong Lin, Chunxiao Wang, Kai Yu, Chunmei Wang, Jinghua Lv, Baibin Zhou
Summary: A core-shell structured tungstocuprate@silver homo-benzotrizoate complex was synthesized for the first time, showing efficient bifunctional performance in supercapacitors and electrocatalytic oxygen evolution reaction. Its unique structure facilitates interfacial electron transport and exhibits high specific capacitance, good durability, and catalytic activity.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Engineering, Environmental
Yang Song, Minjing Shang, Junguo Li, Yuanhai Su
Summary: A slug-based microreactor system was utilized to integrate the redox reaction between KMnO4 and MnSO4 with the chemical oxidative polymerization of pyrrole, resulting in the preparation of MnO2/PPy composite with a typical core-shell structure. The morphology of the composite material was significantly influenced by the molar ratio and residence time, showing a competition between pyrrole polymerization and MnO2 crystallization. The electrochemical performance of the core-shell composite material was enhanced, demonstrating the synergistic effect between MnO2 and PPy.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
Jing Wang, Feng Zheng, Mingjun Li, Jiao Wang, Donghua Jia, Xiaodong Mao, Pengfei Hu, Qiang Zhen, Yi Yu
Summary: V2O5 nanobelt arrays covered with RuO2 nanosheets form a core-shell heterojunction with excellent specific capacitive value, cyclic steadiness, charge transferring resistance, and effective diffusion coefficient. Assembled into an electrochemical capacitor, it exhibits superior energy density.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Beirong Ye, Shuhao Xiao, Xianjun Cao, Junsong Chen, Aijun Zhou, Qiang Zhao, Wen Huang, Jinshu Wang
Summary: Interface engineering of core/shell structured NiTe@NiCoSe2 composite for supercapacitors enhances energy storage capability, with high-efficient synergistic effects among multicomponents and excellent stability with 96.6% capacitance retention after 10000 cycles.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Physical
Xiaojuan Lian, Wei Guo, Yueli Wu, Yamei Tian, Shuang Wang
Summary: In this study, Co3O4@Co9S8 core-shell nanorods were designed and prepared by hydrothermal method, showing promising performance as an electrode material with large surface area and efficient ion diffusion path. The hierarchical structure exhibited satisfactory specific capacity, good rate performance, and cycling stability, as well as successfully driving LEDs, indicating exciting application prospects.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Linli Zhu, Chen Hao, Saisai Zhou, Xiaohong Wang, Tiantian Zhou, Yaning Guo
Summary: Utilizing a seed method, a double template ZIF-8@ZIF-67 with a layered core-shell structure was prepared and further transformed into ternary ZnO/Co3O4/NiO. The optimized ZnO/Co3O4/NiO-2 exhibited outstanding electrochemical performance, superior cycling stability, and high energy density.
JOURNAL OF MATERIOMICS
(2021)
Article
Materials Science, Multidisciplinary
Yumei Luo, Xu Feng, Dan Wei, Lingling Zhang, Qingyong Wang, Fan Yang, Shujun Qiu, Fen Xu, Yongjin Zou, Lixian Sun, Hailiang Chu
Summary: The study developed a novel electrode material for energy storage devices by designing the structure and improving conductivity and component synergy. A core-shell composite called Ni-Co-O/NiCo-LDH was constructed using a self-template method. The material showed a Chinese chestnut-like structure with nanoneedles. The electrode exhibited improved pseudocapacitance characteristics and high electrochemical performance, reaching a specific capacitance of 1434 F g(-1) at 1 A g(-1). When combined with activated carbon as the negative electrode, the supercapacitor achieved an energy density of 26 Wh kg(-1) at a power density of 807 W kg(-1). The device also demonstrated excellent cycle stability, with 95% capacity retention after 3600 cycles at 6 A g(-1), expanding its potential applications.
Article
Chemistry, Multidisciplinary
Ding Zhang, Constantine Tsounis, Zhipeng Ma, Dominique Djaidiguna, Nicholas M. Bedford, Lars Thomsen, Xunyu Lu, Dewei Chu, Rose Amal, Zhaojun Han
Summary: A metal-free edge-rich vertical graphene catalyst has been synthesized and exhibits superior performance for hydrogen peroxide production in alkaline media. By tailoring oxygen-containing functional groups and developing a vacuum-based method to enhance surface wettability, gas diffusion rate has been greatly improved without compromising Faradaic efficiency.
Article
Chemistry, Physical
Xingyu Qu, He Huang, Tao Wan, Long Hu, Zhenlu Yu, Yunjian Liu, Aichun Dou, Yu Zhou, Mingru Su, Xiaoqi Peng, Hong-Hui Wu, Tom Wu, Dewei Chu
Summary: An integrated surface coating/doping strategy has been developed to improve the structural stability and electrochemical performance of high-nickel layered oxides, leading to enhanced cycling stability and capacity retention of batteries. The strategy involves diffusion of titanium ions from a thin coating layer, formation of a protective layer on the material surface, and Ti4+ doping to enhance lithium ion diffusion and reduce side reactions, ultimately benefiting the cycling stability of the cathode.
Article
Chemistry, Physical
Zhenlu Yu, He Huang, Yunjian Liu, Xingyu Qu, Yu Zhou, Aichun Dou, Mingru Su, Hong-Hui Wu, Liang Zhang, Kehua Dai, Zaiping Guo, Tao Wan, Mengyao Li, Dewei Chu
Summary: Li-excess cation-disordered oxide cathodes with high energy density have attracted attention. In this study, it was found that carbon/Al2O3 double coating and partial Al3+ substitution can enhance the capacity and cycling performance of Ni-based cation-disordered oxide cathodes. Carbon coating promotes O redox activity, while Al3+ substitution shortens the band overlap between Ni and O. Additionally, Al2O3 coating and Al3+ doping improve the cycling stability of the cathode material.
Article
Chemistry, Physical
Jiaxin Peng, Juan Yu, Dewei Chu, Xueyang Hou, Xuefeng Jia, Bicheng Meng, Kai Yang, Junkai Zhao, Naixing Yang, Jianchun Wu, Linbo Li
Summary: In this study, a novel and high-performance rechargeable aqueous zinc-based hybrid supercapacitor (ZHSC) was developed. The ZHSC was assembled using a persimmon-branch biomass carbon-based material with a naturally graded pore structure as the cathode, and a carbonized persimmon branch carbon-coated zinc foil as the anode, with the addition of Cu2+-electrolyte additive. The assembled ZHSC exhibited excellent electrochemical performance, high discharge capacity and energy density, and demonstrated a long cycle life under high current density.
Article
Engineering, Environmental
Xuri Wang, Ahmad Naveed, Tianyi Zeng, Tao Wan, Hanwei Zhang, Yu Zhou, Aichun Dou, Mingru Su, Yunjian Liu, Dewei Chu
Summary: A nonstoichiometric Na-0.3(NH4)(0.6)V4O10 center dot 0.4H(2)O(NVO-Na) cathode material was developed for aqueous zinc ion batteries (AZIBs), which enhances the diffusion kinetic and keeps the layer structure stable. The NVO-Na cathode exhibits impressive specific capacity and excellent capacity retention, showing promise for high-performance AZIBs cathode materials.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Materials Science, Multidisciplinary
Yanzhe Zhu, Renbo Zhu, Fandi Chen, Shuo Zhang, Yu-Chieh Kuo, Peiyuan Guan, Mengyao Li, Yunjian Liu, Zhaojun Han, Tao Wan, Dawei Wang, Caiyun Wang, Dewei Chu
Summary: In this study, a flexible quasi-solid-state Ag-Zn battery system with superior performance was developed by using mild electrolyte and binder-free electrodes. The introduction of a copper foam current collector impedes the growth of Zn dendrite, and the structure of Ag cathode is engineered to improve the areal capacity. This battery demonstrates remarkable cycle retention and high energy density.
ENERGY & ENVIRONMENTAL MATERIALS
(2023)
Article
Engineering, Environmental
Mingru Su, Meiqing Li, Kuidong He, Tao Wan, Xueli Chen, Yu Zhou, Panpan Zhang, Aichun Dou, Haolan Xu, Chunsheng Lu, Renheng Wang, Dewei Chu, Yunjian Liu
Summary: Copper niobate nanoparticles have been demonstrated to be a promising anode material for lithium-ion batteries, exhibiting high capacity, ultra-fast charging, and safety characteristics. The nanoparticles possess a unique crystal structure and morphology that provide structural stability and enhanced Li+ transfer kinetics. These nanoparticles show significant pseudocapacitive behavior and excellent electrochemical performances, with high capacity retention and impressive rate performance even at high charging rates.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Materials Science, Multidisciplinary
Ziheng Feng, Renbo Zhu, Fandi Chen, Yanzhe Zhu, Yingze Zhou, Peiyuan Guan, Yu-Chieh Kuo, Jiajun Fan, Tao Wan, Mengyao Li, Zhaojun Han, Dawei Su, Dewei Chu
Summary: This review summarizes the recent progress in water-induced electricity generation based on 2D materials, including four categories: droplet, flow, evaporation, and moisture. Water, as a natural resource, holds great potential as an alternative to traditional energy conversion technologies.
JOURNAL OF MATERIALS RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Zhemi Xu, Tianhao Ji, Shule Zhang, Peiyuan Guan, Joshua Elliott, Tao Wan, Claudio Cazorla, Dewei Chu
Summary: This work explores the defects in Mn-doped SnO2 and compares the effects of interstitial Mn and oxygen vacancies on its electronic structure. The study shows that when Mn-doped SnO2 is synthesized under Sn-rich or O-poor conditions, a defect pair of Mn substitution and interstitial is formed, leading to an energy band across the Fermi level and significant changes in the electronic structure of SnO2. The presence of Mn interstitials allows for stable multi-level resistive states and optical SET in Mn-doped SnO2 memristors, providing guidance for the fabrication of defective metal oxides and promoting research on interstitial-triggered resistive switching and optoelectronic memristors.
MATERIALS SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Xinwei Guan, Prashant Kumar, Zhixuan Li, Thi Kim Anh Tran, Sumit Chahal, Zhihao Lei, Chien-Yu Huang, Chun-Ho Lin, Jing-Kai Huang, Long Hu, Yuan-Chih Chang, Li Wang, Jolitta S. J. Britto, Logeshwaran Panneerselvan, Dewei Chu, Tom Wu, Ajay Karakoti, Jiabao Yi, Ajayan Vinu
Summary: This article reports the discovery of incorporating borophene into cellulose nanofibers (CNF), which enables excellent environmental stability with a high light-to-heat conversion efficiency of 91.5% and a water evaporation rate of 1.45 kg m(-2) h(-1) under simulated sunlight. It is also demonstrated that borophene papers can be used as an excellent active photothermal material for eliminating almost 100% of both gram-positive and gram-negative bacteria within 20 min under three sun irradiations.
Article
Nanoscience & Nanotechnology
Xiaotong Peng, Long Hu, Xueqian Sun, Yuerui Lu, Dewei Chu, Pu Xiao
Summary: In this research, CsPbBr3 QDs/polymer composites were fabricated through a photopolymerization strategy, in which CsPbBr3 quantum dots played a dual role as both photoinitiators and emitters. The addition of additives optimized the polymerization processes and improved the photoinitiation efficiency. This strategy shows promise in enhancing the long-term stability and device performance for luminescent displays and lighting applications.
ACS APPLIED NANO MATERIALS
(2023)
Article
Engineering, Environmental
Rohan Bahadur, Gurwinder Singh, Mengyao Li, Dewei Chu, Jiabao Yi, Ajay Karakoti, Ajayan Vinu
Summary: In this study, BCN conjugated nanoporous carbons were synthesized through a unique approach of integrating the synthesis method of BCN and nanoporous carbon with chemical activation. The optimized sample showed excellent CO2 adsorption capacity and specific capacitance in a three-electrode supercapacitor system. This facile method has the potential to synthesize a variety of hybrid nanoporous carbon nanostructures for adsorption and energy storage applications.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Ahmad Naveed, Guotai Li, Amjad Ali, Mengyao Li, Tao Wan, Mobashar Hassan, Xuri Wang, Pan Ye, Xiaowei Li, Yu Zhou, Mingru Su, Ruiqiang Guo, Yunjian Liu, Haolan Xu, Dewei Chu
Summary: A new organic electrolyte is proposed for zinc batteries, which can prevent battery failures and ensure safety. The electrolyte enables highly reversible and dendrite-free zinc anode. Molecular simulations reveal the beneficial role of the new electrolyte in stabilizing zinc anode.
Article
Chemistry, Physical
Shule Zhang, Zhemi Xu, Tianhao Ji, Zhongyi Chen, Peiyuan Guan, Ao Li, Dajian Jv, Tianyue Liang, Yunxuan Weng, Zhimin Ao
Summary: A photo-piezoelectric synergistic catalyst of Bi2Fe4O9/Carbon-dots/g-C3N4 heterostructure was fabricated to achieve highly efficient antibiotics and dye degradation, even under weak visible-light treatment and mechanical stress. This heterostructure can fully utilize wave energy and light irradiation in various natural water environments and enhance catalytic degradation efficiency, even in cloudy weather or at night.
SURFACES AND INTERFACES
(2023)
Article
Chemistry, Physical
Jingyuan Zhao, Xuan Wu, Huimin Yu, Yida Wang, Pan Wu, Xiaofei Yang, Dewei Chu, Gary Owens, Haolan Xu
Summary: Direct conversion of low-grade heat into electricity has great potential for energy generation. This study presents a thermogalvanic cell that utilizes a cellulose fiber-based porous aerogel to harvest and convert thermal energy, while minimizing heat loss.
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)