Article
Chemistry, Physical
Pengchao Wu, Kai Wang, Shichao Yu, Mengling Feng, Yong Chen, Shaohua Liu, Jianwei Fu
Summary: By combining multiple heteroatom codoping with a unique 2D carbon nanoarchitecture, NP-PCNs with rich heteroatom codoping, moderate specific surface area, and hierarchical porosity were successfully synthesized for supercapacitor electrodes. The optimized sample NP-PCNs-100 exhibited high specific capacitance, attractive rate performance, and impressive cycling stability, making it a promising candidate for energy storage applications.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Feng Wei, Yuchen Guo, Shichao Wang, Yaojie Gao, Jun Qiao, Songlin Ran, Mengcheng Han
Summary: In this study, nitrogen and phosphorus doped carbon nanosheets (NPCNs) were prepared from silicon-removed carbon derived from rice husk as a carbon resource. The as-prepared NPCN showed a large surface area and a suitable nitrogen and phosphorus content, enabling efficient adsorption and transfer of electrolyte ions and generating pseudo-capacitance through redox. As a result, excellent electrochemical properties were achieved for NPCN-based supercapacitors, such as a capacitance of 396.1 F g-1 at 0.1 A g-1, a capacitance decay of only 0.95% after 30,000 cycles. Moreover, the energy density of NPCN-based supercapacitors increased 2.67-fold and 11-fold in neutral and ionic liquid electrolytes, respectively.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Pengchao Wu, Kai Wang, Shichao Yu, Mengling Feng, Shaohua Liu, Jianwei Fu
Summary: The nanohybrid of nitrogen-doped porous carbon nanosheets and MnO2 nanosheets was successfully prepared through a simple method, exhibiting high specific surface area and good electrochemical performance for use in high energy density asymmetric supercapacitors.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Physical
Lina Ma, Wei Zhang, Renjie Zhang, Haijun Niu, Qun Yang, Fan Li, Min Zhou, Lixue Zhang, Yudong Huang
Summary: Hierarchical porous heteroatom-doped carbon frameworks with large specific surface area, high conductivity, and abundant active sites have been successfully achieved through topology design, in situ polycondensation reaction, and high-temperature carbonization. The optimal N,O-doped carbon nanosheets exhibit high heteroatom content, large specific surface area, and superior electrochemical performance, with a high energy density of 15.28 Wh kg-1 at 352.5 W kg-1.
APPLIED SURFACE SCIENCE
(2023)
Article
Environmental Sciences
V. Thirumal, K. Dhamodharan, R. Yuvakkumar, G. Ravi, B. Saravanakumar, M. Thambidurai, Cuong Dang, Dhayalan Velauthapillai
Summary: This study reported the successful preparation and characterization of bio-activated carbon nanosheets synthesized from tamarind fruits shells by Chemical Vapor Deposition method. The materials showed promising potential as electrode materials for energy storage supercapacitors, with excellent electrochemical performance.
Article
Energy & Fuels
Hamouda Adam Hamouda, Shuzhen Cui, Xiuwen Dai, Xuan Xie, Hui Peng, Guofu Ma, Ziqiang Lei
Summary: A novel high-performance asymmetric supercapacitor has been fabricated using cobalt manganese oxide nanoneedles as a positive electrode and hibiscus fruits-based carbon nanosheet as a negative electrode. The supercapacitor exhibits excellent energy density and cycling stability under high power density.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Chemistry, Physical
Chong Chen, Yunzhao Xu, Jiacan Shao, Yaru Zhang, Mengting Yu, Lei Sun, Hongyan Wang, Yong Xie, Guang Zhu, Li Zhang, Likun Pan
Summary: In this work, nitrogen and fluorine co-doped porous carbon nanosheets were synthesized from pharmaceutical drug residues. The obtained nanosheets exhibited a well-integrated structure, large specific surface area, hierarchical porous structure, and high level of heteroatom content. The resulting supercapacitors based on these nanosheets demonstrated excellent electrochemical performance, including high gravimetric capacitance, good rate capability, and high energy density.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Xiaohu Pi, Xuxu Sun, Ruiqi Wang, Changle Chen, Shengbing Wu, Furu Zhan, Junbo Zhong, Qi Wang, Kostya Ken Ostrikov
Summary: This work presents a plasma-enabled method for preparing MoS2 nanosheet-based supercapacitor electrodes on flexible N-doped carbon cloth. The resulting MoS2/NCC electrodes show outstanding specific capacitance and energy density, as well as excellent cycling stability in an aqueous symmetric supercapacitor. This study provides a new perspective on fabricating high-performance all-solid-state flexible supercapacitors for clean energy storage.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Physical
Yogesh T. Nakate, Umesh T. Nakate, R. S. Mane, Dhammanand J. Shirale
Summary: By utilizing natural coconut liquid as a precursor, vertically aligned nanosheets carbon network was spray deposited on nickel foam electrodes, showing excellent electrochemical characteristics and stability. This bio-derived carbon electrode demonstrated high performance in supercapacitor devices, indicating potential cost-effective and green-synthesized materials for various applications.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Chemistry, Physical
Sandhya Rani Mangisetti, M. Kamaraj, Ramaprabhu Sundara
Summary: The study presents a simple, large-scale, and cost-effective method to develop hierarchically porous 3D H-GNS with high specific surface area, showing superior performance in the field of supercapacitors. In addition, a biocompatible solid-state flexible supercapacitor device was successfully fabricated and demonstrated for applications in organic electrolytes.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Zhenyuan Ji, Lizhi Chen, Kai Liu, Dongwei Ma, Shuailong Zhang, Guoxing Zhu, Xiaoping Shen, Peng Song, Subramanian Premlatha
Summary: An effective one-step calcination strategy was demonstrated for the fabrication of nickel sulfide and cobalt sulfide nanoparticles deposited on ultrathin carbon two-dimensional nanosheets. The constructed cathode exhibited commendable capacity and cyclic capability, suggesting great potential for practical applications.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Chuang Yang, Peiyao Wang, Zhiyuan Xiong, Xin Wu, Hui Chen, Jing Xiao, Guangmin Zhou, Lixin Liang, Guangjin Hou, Dan Li, Jefferson Zhe Liu, Hui-Ming Cheng, Ling Qiu
Summary: Researchers used a micro-stamping method to create a perpendicular micro-hole array in a thick, dense MoS2-based electrode, improving the efficiency of ion transport in 2D nanosheet-based films. The electrode exhibited high capacity, density, and conductivity, making it suitable for high-capacity supercapacitors.
ENERGY STORAGE MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Huili Liu, Suisui Su, Heng Wang, Miaomiao Wang, Shouren Zhang, Binbin Chang, Baocheng Yang
Summary: This study successfully constructed highly graphitized porous carbon (GPC) with large micropore surface area, superior electrical conductivity, and suitable pore size through one-step heat treatment. By adding potassium ferrate to wasted natural wood, simultaneous hierarchical porosity and graphitization were achieved. The resulting carbon materials exhibited satisfactory capacitive performance in different aqueous electrolytes, and the contributions of porosity and the graphitized structure to capacitance were assessed. The study also established the relationship between the structure of GPC and electrochemical capacitive performance in different aqueous electrolytes, providing valuable insights for GPC-based supercapacitors in various practical applications.
NANOSCALE ADVANCES
(2022)
Article
Engineering, Environmental
Tie Shu, Hao Wang, Qian Li, Zipeng Feng, Fuxiang Wei, Ke Xin Yao, Zhi Sun, Jiqiu Qi, Yanwei Sui
Summary: A two-step thermal conversion method was reported to synthesize tightly aligned Co3O4/carbon materials, featuring a structure of cross-linked nanosheets and uniformly distributed Co3O4 nanoparticles. The material exhibited high specific capacitance and cycling stability in supercapacitor tests, and showed excellent energy density and power density in an asymmetric supercapacitor configuration.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Biochemistry & Molecular Biology
Yanhua Li, Shuhuan Wang, Guolong Ni, Qun Li
Summary: In this study, a 3D hierarchical structure of NiCo2O4 nanowires grown on few-layer Ti3C2 nanosheets was constructed using Ni foam as a substrate. The resulting material exhibited abundant active sites and ion diffusion pathways, leading to enhanced electrochemical performance and rate performance. Based on this, an asymmetric supercapacitor was assembled, which showed excellent electrochemical performance and energy density.
Article
Environmental Sciences
Sajjad Hussain, Muhammad Mubeen, Ashfaq Ahmad, Shah Fahad, Wajid Nasim, Hafiz Mohkum Hammad, Ghulam Mustafa Shah, Behzad Murtaza, Muhammad Tahir, Saima Parveen
Summary: Pakistan is among the top 50 countries estimated to face serious agricultural and food shortages due to the COVID-19 pandemic. This study evaluated the impact of COVID-19 on food supply chains and agriculture in Punjab, Pakistan, using space-time scan statistics. The findings showed that disruptions in the supply chain could result in difficulties for farmers to access markets and lead to a decline in production and sales of crops and livestock.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Zhaoyang Wang, Xiaobin Liao, Min Zhou, Fuzhi Huang, Kwadwo Asare Owusu, Jiantao Li, Zifeng Lin, Qi Sun, Xufeng Hong, Congli Sun, Yi-Bing Cheng, Yan Zhao, Liqiang Mai
Summary: In this study, a bifunctional electrocatalyst with abundant heterointerfaces and sulfur vacancies on graphene (Cu1Ni2-S/G) was prepared for oxygen reduction and alcohols oxidation reactions (ORR, AOR). The Cu1Ni2-S/G catalyst showed significantly enhanced ORR activity with long term stability and achieved a high Faradaic efficiency for ethyl acetate production during AOR. The study highlights the synergistic effects of interfacial coupling and vacancies engineering in tailoring catalytic activity and opens up new avenues for self-driven biomass electrocatalysis systems.
ENERGY & ENVIRONMENTAL MATERIALS
(2023)
Article
Engineering, Environmental
Wei Peng, Zhaoyang Wang, Ruihu Lu, Qi Li, Ziyun Wang, Yan Zhao, Lin Xu, Liqiang Mai
Summary: In this study, a novel metallic heterostructure composed of defect-rich nickel and amorphous/crystalline molybdenum nitride anchored on a carbon matrix (MoN/Ni@C) was fabricated and demonstrated as a superior electrocatalyst for the hydrogen evolution reaction (HER). The MoN/Ni@C electrocatalyst exhibited low HER overpotential and small Tafel slope, along with excellent stability in alkaline solution. Density functional theory calculations revealed that the interfacial electron transfer contributed to the distortion of Ni surface and the optimal thermoneutral hydrogen adsorption free energies on Mo and Ni active sites. The amorphous/crystalline structure in the MoN phase provided more active sites and promoted structural stability. This work provides new insights into designing non-noble-metal-based electrocatalysts with superior HER activities.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Chenxu Dong, Cheng Zhou, Yan Li, Yongkun Yu, Tianhao Zhao, Ge Zhang, Xinhui Chen, Kaijian Yan, Liqiang Mai, Xu Xu
Summary: In this study, the problem of shuttle effect and sluggish redox reaction in Li-S batteries was successfully addressed by modifying polypropylene separators. The Li-S batteries showed admirable cycling stability and capacity even after 400 cycles of testing. Thus, this research provides a new approach for using single atom catalysts in Li-S batteries.
Review
Chemistry, Physical
Xuanpeng Wang, Zhitong Xiao, Kang Han, Xiao Zhang, Ziang Liu, Chen Yang, Jiashen Meng, Ming Li, Meng Huang, Xiujuan Wei, Liqiang Mai
Summary: This article summarizes the current research status and prospects of layered transition-metal oxide cathodes, with a focus on engineering the fine structure optimization and energy storage mechanism. Additionally, advanced characterization techniques for potassium-ion batteries are introduced, and the main research directions and hot spots of new-type transition-metal layered oxide cathodes are predicted.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Juncai Long, Shuangshuang Tan, Junjun Wang, Fangyu Xiong, Lianmeng Cui, Qinyou An, Liqiang Mai
Summary: Exploring diverse Mg(ORF)(2) electrolytes, the Mg(PFTB)(2)/AlCl3/MgCl2 based electrolyte demonstrates the highest oxidation stability, enabling the formation of a robust solid electrolyte interface and long-term cycling of over 2000 hours for symmetric cells and stable Coulombic efficiency of 99.5% over 3000 cycles for asymmetric cells. Moreover, the Mg||Mo6S8 full cell maintains a stable cycling over 500 cycles. This work provides guidance for understanding the structure-property relationships and electrolyte applications of fluoride alkyl magnesium salts.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Lei Lv, Ruihu Lu, Jiexin Zhu, Ruohan Yu, Wei Zhang, Enhui Cui, Xingbao Chen, Yuhang Dai, Lianmeng Cui, Jiong Li, Liang Zhou, Wei Chen, Ziyun Wang, Liqiang Mai
Summary: In this study, a catalyst with excellent selectivity for electrocatalytic CO2 reduction reaction (ECO2RR) and inhibition of competing hydrogen evolution reaction (HER) has been developed by coordinating the edge defects of bismuth (Bi) with sulfur. The catalyst exhibits high product selectivity, with a HCOO- Faraday efficiency of approximately 95% and an HCOO- partial current of approximately 250 mA cm(-2) under alkaline electrolytes. Density function theory calculations reveal the mechanism behind the improved selectivity and provide guidance for the design of advanced ECO2RR catalysts based on bismuth.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Review
Chemistry, Multidisciplinary
Bin Wu, Tianxiao Sun, Ya You, Haibing Meng, Dulce M. Morales, Mailis Lounasvuori, Abbas Beheshti Askari, Li Jiang, Feng Zeng, Baoshan Hu, Xiangzhi Zhang, Renzhong Tai, Zhichuan J. J. Xu, Tristan Petit, Liqiang Mai
Summary: Metal/nitrogen-doped carbons (M-N-C) are attractive oxygen electrocatalysts with low cost, tunable activity, and well-dispersed morphologies. In situ X-ray absorption spectroscopy (XAS) is a powerful characterization technique for studying the structure and properties of M-N-C catalysts under reaction conditions. This review provides an overview of XAS fundamentals and comprehensively discusses the setup, applications, and challenges of in situ XAS in catalysis. The review also highlights the investigation of active sites and structural evolution of M-N-C catalysts during oxygen electrocatalysis.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Engineering, Electrical & Electronic
Shakeel Ahmad, Jalil Ur Rehman, M. Bilal Tahir, Meshal Alzaid, Khurram Shahzad
Summary: The optical, thermodynamic, mechanical, structural, and electronic properties of rubidium niobate have been studied under pressure using first-principles calculations. The energy bandgap increases from 1.443 to 1.973 eV and exhibits indirect semiconductor behavior at all pressures. The material retains its cubic structure with decreasing lattice parameters. It shows mechanical stability and anisotropic nature, transforming from brittle to ductile. It is non-metallic at low pressures and metallic at high pressures, with increasing hardness. The Debye temperature, thermal conductivity, and melting temperature also increase. Optical investigation suggests its potential as a long-term photocatalytic material.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Optics
Sania Ayub, Adnan Khalil, Rahila Shaheen, Soumaya Gouadria, Muhammad Bilal Tahir, Zaka Ullah, Abdul Hannan, El Sayed Yousef, Meshal Alzaid
Summary: In this work, the structural, elastic, electronic, optical, and magnetic properties of Hg2WO4 are investigated using CASTEP simulation tool. The calculations reveal that Hg2WO4 has a stable C-centered monoclinic structure with space group C2/c. It is found to be a ductile material and has an indirect band gap of 2.14 eV. The optical study shows that it has good photosensitivity in the visible light region and the spin-polarized treatment confirms its antiferromagnetic nature.
Article
Chemistry, Multidisciplinary
Hancheng Ma, Xiang Huang, Luyu Li, Wei Peng, Sheng Lin, Yao Ding, Liqiang Mai
Summary: In this work, phosphorus-doped (P-doped) PtTe2 nanocages with abundant amorphous and crystalline interface (A/C-P-PtTe2) were successfully synthesized via a simple template-free hydrothermal method. The P doping induced atomic Te vacancies on the basal planes of PtTe2, resulting in unsaturated Pt atoms as active sites for the hydrogen evolution reaction (HER) in the amorphous layer. The defective structure of A/C-P-PtTe2 catalysts exhibited fast Tafel step kinetics, leading to an ultralow overpotential and a small Tafel slope in HER.
Article
Materials Science, Multidisciplinary
Yixue Duan, Gongchuan You, Zhe Zhu, Linfeng Lv, Xiaoqiao Liao, Xin He, Kai Yang, Ruiqi Song, Peng Tian, Liang He
Summary: In this study, a reconstructed NiCo alloy microcathode is proposed for a Ni-Zn microbattery, which exhibits excellent performance in high-rate charging and large capacity. The compactly adhered reconstructed layer on the metal substrate enhances the conductivity and reaction depth of the alloy, leading to superior performance in reaction rate and capacity. The microcathode achieves a large capacity of 1.51 mAh cm(-2) and a capacity retention of 82.9% at a current density of 100 mA cm(-2). Furthermore, the excellent performance can be extended to the full Ni-Zn microbattery, maintaining stable fast-charging capability for 7000 cycles. This reconstructed NiCo alloy microcathode provides a new direction for the construction of high-performance output units.
Review
Materials Science, Multidisciplinary
Yanan Mei, Yuling He, Haijiang Zhu, Zeyu Ma, Yi Pu, Zhilin Chen, Peiwen Li, Liang He, Wenwu Wang, Hui Tang
Summary: The development of silicon-based anodes, with higher energy density, has attracted great attention as the capacity of lithium-ion batteries (LIBs) with commercial graphite anodes is gradually approaching the theoretical capacity of carbon. However, the large volume variation during its lithiation/de-lithiation tends to lead to capacity decay and poor cycling performance. This review focuses on three strategies for structural design and optimization of Si/C anodes and provides deeper insights into the problems that remain to be addressed.
Article
Chemistry, Multidisciplinary
Shihao Feng, Kun Li, Ping Hu, Congcong Cai, Jinfeng Liu, Xinyuan Li, Liang Zhou, Liqiang Mai, Bao-Lian Su, Yong Liu
Summary: Hollow carbon nanostructures (HCNs) have intriguing physicochemical properties and various applications, especially in electrochemical energy storage. However, the current solvent-based methods for preparing HCNs are not convenient, environmentally friendly, or scalable. In this study, a solvent-free block copolymer self-assembly approach was used to prepare various hollow hard carbon nanostructures with high electrochemical energy storage performance.
Article
Chemistry, Multidisciplinary
Ze He, Jiawei Guo, Fangyu Xiong, Shuangshuang Tan, Yixu Yang, Ruyue Cao, Greta Thompson, Qinyou An, Michael De Volder, Liqiang Mai
Summary: This article introduces improvements made to the Daniell cell to make it rechargeable, including the use of ion exchange membranes as alternatives to salt bridges. These improvements result in increased energy density of the Daniell cell and allow for easy recycling and scalability to higher capacity cells.
ENERGY & ENVIRONMENTAL SCIENCE
(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)
