Article
Chemistry, Applied
Md Manik Mian, Ishimwe Marie Louise Kamana, Xingye An, Syed Comail Abbas, Md Sohel Ahommed, Zhibin He, Yonghao Ni
Summary: The potential of plant-derived cellulose nanofibers (CNF) as binders for supercapacitors is demonstrated in this study. Compared to traditional polyvinylidene fluoride (PVDF) binders, CNF binders improve the performance of supercapacitors, increasing the capacitance and energy density, and exhibiting high capacitance retention. This study showcases a strategy for improving supercapacitor performance and highlights the sustainable application of nanofibers in energy devices.
CARBOHYDRATE POLYMERS
(2023)
Article
Multidisciplinary Sciences
Nurulsafeelanaria Benwannamas, Tanagorn Sangtawesin, Murat Yilmaz, Kotchaphan Kanjana
Summary: Activated carbons (ACs) were developed from palm petiole via an eco-friendly method. The ACs were used as active materials for supercapacitor electrodes and exhibited excellent electrochemical performance and cycle stability. The promising results ensure the high possibility of the eco-friendly method application in supercapacitor material production.
SCIENTIFIC REPORTS
(2023)
Review
Energy & Fuels
Lu Luo, Yuling Lan, Qianqian Zhang, Jianping Deng, Lingcong Luo, Qinzhi Zeng, Haili Gao, Weigang Zhao
Summary: This article provides an overview of the activation methods and mechanisms used in various biomass activated carbons, as well as a review of their recent application in electrochemical supercapacitors. It discusses the effects of activation treatment on the morphology and pore structure of activated carbon materials and summarizes the impact of different factors on supercapacitor performance. The article also summarizes the current state of research, future development prospects, and challenges in promoting the application of biomass activated carbons in various fields.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Environmental Sciences
V Thirumal, R. Yuvakkumar, G. Ravi, G. Dineshkumar, M. Ganesan, Saad H. Alotaibi, Dhayalan Velauthapillai
Summary: This study explored a facile synthesis of chemical and thermal activation of biomass tea-waste materials, developing a porous activated carbon material with good morphological structures and transparent layered nanosheets. It showed excellent electrochemical performance and is a promising active material for high-energy supercapacitor applications.
Article
Chemistry, Multidisciplinary
Rui Liu, Jing-Xuan Wang, Wein-Duo Yang
Summary: In this study, hierarchical porous activated carbon was prepared using coconut husk biomass waste as the carbon precursor, and its electrochemical properties were investigated. The carbonization process variables and the resulting powder properties were examined. The as-prepared activated carbon electrode exhibited pseudo-capacitive behavior and achieved a specific capacitance of 186 F g(-1) at 1 A g(-1). After 7000 cycles of charge-discharge testing, the initial capacitance retention rate was 95.6%. It is predicted that capacitor materials made from coconut shell will have better energy storage performance than traditional carbon supercapacitors.
Article
Engineering, Chemical
E. Yi, Xing Shen, Xin Chen, Meng Jiang, Wei Yan, Yang Liu, Wenrui Jiang, Muhammad Abdullah
Summary: We prepared different types of activated carbon (AC) by charring and chemical activation methods, and obtained a composite material by combining graphene and biomass AC. The specific capacitance of the biomass composite AC based supercapacitor material was higher than that of commercial activated carbon. It also significantly improved the overall performance of the assembled supercapacitor devices.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Engineering, Chemical
Mohammed Jalalah, Siddheswar Rudra, Belqasem Aljafari, Muhammad Irfan, Saleh S. Almasabi, Turki A. Alsuwian, Akshay A. A. Patil, Arpan Kumar Nayak, Farid A. Harraz
Summary: In this study, heteroatom-doped porous activated carbon nanoflakes were synthesized from sustainable biomass, showing excellent specific capacitance and cycling stability, making them suitable for energy storage applications.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2022)
Article
Energy & Fuels
Amrita Jain, Meena Ghosh, Marcin Krajewski, Sreekumar Kurungot, Monika Michalska
Summary: In this research, a novel activated carbon derived from a mixture of native European trees was synthesized and used as the electrode material for supercapacitors. The prepared carbon exhibited good porosity and a high specific surface area, delivering a specific capacitance of 24 F g(-1) with excellent cycling stability over 10000 charge/discharge cycles. This study demonstrates the facile synthesis of biomass-derived carbon for versatile electrode applications in supercapacitors.
JOURNAL OF ENERGY STORAGE
(2021)
Review
Energy & Fuels
Pantrangi Manasa, Sangaraju Sambasivam, Fen Ran
Summary: This review focuses on recent research progress in biomass-derived carbon electrode materials for supercapacitor applications, including materials derived from plants, fruits, vegetables, animal waste, and microorganisms. The review also discusses various synthesis methods for converting and activating biomass waste. Furthermore, it provides a summary and future research trends in this field.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Energy & Fuels
Heri Rustamaji, Tirto Prakoso, Hary Devianto, Pramujo Widiatmoko, Wibawa Hendra Saputera
Summary: This study synthesized urea nitrogenated activated carbon (N-ACU) from oil palm empty fruit bunches and investigated its performance as a supercapacitor electrode. The results showed that the urea to hydrochar impregnation ratio affected the characteristics of N-ACU and the performance of supercapacitors. Urea nitrogenated treatment on activated carbon reduced resistance and maintained the stability of the supercapacitor. This study suggests that synthesizing nitrogenated activated carbon from biomass waste is a promising method for producing electrode materials.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Energy & Fuels
V. N. Kitenge, D. J. Tarimo, K. O. Oyedotun, G. Rutavi, N. Manyala
Summary: This study investigates the effect of different activating agents, temperatures, and impregnation ratios on the porosity of mangosteen shell-derived activated carbons. The synthesized activated carbon shows high specific surface area and specific capacitance, indicating its potential in energy storage applications.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Chemistry, Analytical
Elaiyappillai Elanthamilan, Samson Jegan Jennifer, Sea-Fue Wang
Summary: In this study, a simple and cost-effective method was used to prepare highly porous activated carbon from Sargassum wightii macroalgae. The activated carbon showed high surface area and specific capacitance, making it a potential electrode material for low-cost and sustainable supercapacitors.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Veridiana Gehrke, Guilherme Kurz Maron, Lucas da Silva Rodrigues, Jose Henrique Alano, Claudio Martin Pereira de Pereira, Marcelo Ornaghi Orlandi, Neftali Lenin Villarreal Carreno
Summary: The utilization of activated carbons derived from residual biomass as electrodes for energy storage devices shows great potential, with activated carbons derived from citrus bergamia peels activated with phosphoric acid and manganese nitrate exhibiting excellent performance in supercapacitors, achieving high specific capacitance and energy density.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Pelin Ozpinar, Ceren Dogan, Hakan Demiral, Ugur Morali, Salim Erol, Derya Yildiz, Canan Samdan, Ilknur Demiral
Summary: This study introduced the electrochemical performance of electrode materials based on two commonly used binders, PVDF and PTFE. The electrochemical performance of activated carbon electrodes was studied using cyclic voltammetry, galvanostatic charge-discharge, and electrochemical impedance spectroscopy techniques. The results showed that AC-500-PTFE exhibited higher capacitance values at low current rates, while AC-500-PVDF had higher capacitance values for current rates higher than 1.5 A g-1. The impedance model indicated that the AC-500-PVDF had higher capacitance inside the pores, while the AC-500-PTFE had higher capacitance on the electrode surface. Therefore, PTFE binder is recommended for low current density applications, while PVDF binder is preferred for high current density applications.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yinan Tang, Lu Lu, Xiaoxian Zang, Buhuan Wang, Xiangrong Ye
Summary: The KOH-activated carbon materials prepared from cellulose and lignin, two biomass-derived carbon sources, were compared. The blend of cellulose with lignin in a mass ratio of 1:1 exhibited the highest specific surface area and energy storage performance.
Article
Chemistry, Physical
Xiangyu Meng, Qi Zhan, Yanan Wu, Mengmeng Zhu, Ken Liu, Na Wang, Kuibo Yin, Yueming Sun, Shuai Dong, Yunqian Dai
Summary: This study successfully enhances the photoelectrochemical performance by designing a bioinspired ivy-like Fe2O3 heterostructure. The ivy-like Fe2O3 photo-sheets enhance light harvesting, while the oxygen vacancies on Fe(2)O(3) photo-sheets promote reactivity. The tip-edges within the ivy-like Fe2O3 photo-sheets enable a hydrophilic and aerophobic surface, providing a high density of unoccupied active sites. The Fe2O3@TiO2 nanofibers exhibit excellent photocurrent, high donor density, and rapid oxygen production rate.
Article
Engineering, Environmental
Siqi Ji, Xiaowen Lu, Mingyang Zhang, Leipeng Leng, Hongxue Liu, Kuibo Yin, Chang Xu, Cheng He, J. Hugh Horton, Jiangwei Zhang, Zhijun Li
Summary: A catalyst with atomic palladium atoms supported over UiO-66-NH2 demonstrates extraordinary catalytic performance in terms of activity, selectivity, and yield. The high catalytic activity is attributed to optimized electronic metal-support interactions and positive valence state of the palladium atoms.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Rui Pan, Fuhan Cui, Anqi Zheng, Guoju Zhang, Zhenjing Jiang, Yuwei Xiong, Lei Wei, Qichong Zhang, Litao Sun, Kuibo Yin
Summary: Freestanding amorphous vanadium oxysulfide (AVSO) cathodes with abundant defects and auxiliary anionic redox centers were developed via in situ anodic oxidation strategy. The AVSO cathodes demonstrated numerous Zn2+ isotropic pathways and rapid reaction kinetics, performing high reversible capacity and high-rate capability. The amorphous structure with sulfur chemistry allowed the AVSO composites to tolerate volumetric change, resulting in alleviated structural degradation and exceptional long-term cyclability.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Haiyang Jia, Fen Zhang, Jiawei Sun, Shouxi Jiang, Qiaohan Yin, Yu Zhang, Xiao Xie
Summary: Benefiting from hydrophilicity and modifiability, aminated iron oxide nanoparticles are widely used in the construction of magnetic functional materials in the fields of biomedicine and water purification. In this study, amino-grafted water-soluble maghemite nanocrystals were synthesized using deep eutectic solvents (DES) as an electrolyte for organic electrolysis (DES-electrolysis). The findings demonstrate that the resulting nanocrystals are maghemite, regardless of the presence or absence of ferrous ions in the DES-based electrolyte. This work provides a deeper understanding of the formation mechanism of amino-grafted water-soluble maghemite nanocrystals synthesized by DES-electrolysis.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Physical
You Wu, Li Chen, Yixuan Han, Panbo Liu, Haihong Xu, Guanze Yu, Yingying Wang, Tao Wen, Wenbo Ju, Junwei Gu
Summary: In this work, a strategy of efficient utilization of carbon nanotubes (CNTs) in producing CNT incorporated aramid papers is demonstrated. The layer-by-layer self-assembly technique is used to coat the surfaces of meta-aramid fibers and fibrils with CNT, providing novel raw materials available for large-scale papermaking. The hierarchical construction of CNT networks resolves the dilemma of increasing CNT content and avoiding the agglomeration of CNT, which is a frequent challenge for CNT incorporated polymeric composites. The composite paper exhibits a high permittivity and dielectric loss tangent at a low CNT loading, and achieves high-efficiency microwave absorption in the X-band.
Article
Chemistry, Multidisciplinary
Jun Wang, Suting Liu, Mingyu Tang, Wanlin Fu, Yunpeng Wang, Kuibo Yin, Yunqian Dai
Summary: In this work, a double-confinement strategy is demonstrated to stabilize 2.6 nm-Pt clusters against sintering on electrospun CeO2 nanofibers decorated by CeO2 nanocubes (m-CeO2). The Pt clusters are physically restricted on each facet of CeO2 nanocubes in a nanosized region, allowing them to remain stable at high temperatures without observable size growth or migration. This sinter-resistant catalytic system exhibits enhanced catalytic activity towards hydrogenation and oxidation reactions.
Article
Chemistry, Multidisciplinary
Zhenjing Jiang, Kuibo Yin, Rui Pan, Guoju Zhang, Fuhan Cui, Kailin Luo, Yuwei Xiong, Litao Sun
Summary: A heterostructured interface of ZnO rod array and CuZn5 layer (ZnCu@Zn) is fabricated on the Zn substrate to address the issues of dendrite growth and parasitic reactions. The CuZn5 layer provides abundant nucleation sites, ensuring uniform Zn nucleation during cycling, while the grown ZnO rod array guides dendrite-free Zn deposition. As a result, the ZnCu@Zn anode exhibits an ultra-long lifespan of up to 2500 h and remarkable cyclability in full cells. This heterostructured interface provides a feasible strategy for high-performance metal anode design.
Article
Multidisciplinary Sciences
Xiangyu Meng, Chuntong Zhu, Xin Wang, Zehua Liu, Mengmeng Zhu, Kuibo Yin, Ran Long, Liuning Gu, Xinxing Shao, Litao Sun, Yueming Sun, Yunqian Dai, Yujie Xiong
Summary: Researchers have developed hierarchical triphase diffusion photoelectrodes through simulation guidance to improve mass transfer and ensure electron transfer in photoelectrochemical gas/liquid flow conversion. Semiconductor nanocrystals are integrated within electrospun nanofiber-derived mats to overcome brittleness. This design enables continuous gas/liquid conversion in a flow cell with enhanced production rates and product selectivity for methane conversion.
NATURE COMMUNICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Yuheng Huang, Meng Nie, Binghui Li, Bozhi Wu, Anqi Zheng, Kuibo Yin, Litao Sun
Summary: This study designs a thermal driving-based MEMS device and develops an in situ real-time quantitative dynamic testing technique, which is applied to TiO2 nanowires. The results show that the TiO2 nanowires exhibit excellent stability under both static and dynamic stretching. Furthermore, the effects of ion beam irradiation on the properties of the nanowires are also analyzed.
IEEE SENSORS JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Yuting Shen, Shi Su, Tao Xu, Kuibo Yin, Kaishuai Yang, Litao Sun
Summary: Oriented attachment plays an important role in the assembly of nanodiamonds and their regulation. The alignment between nanodiamond surfaces determines the occurrence of an oriented attachment event, which leads to the formation of spherical particles through recrystallization. Molecular dynamics simulations reveal that nanodiamond pairs preferentially coalesce along the {111} surfaces, and kinetic factors such as contact surface area and contact angle also influence the coalescence process.
Article
Chemistry, Multidisciplinary
Yujie Song, Xiao Xie, Yang Liu, Zhen Zhu, Litao Sun
Summary: Metal ions, especially Cu2+, play vital roles in various biochemical reactions in the human body and are essential for maintaining good health. This study investigates the interaction between Cu2+ and DNA using transmission electron microscopy (TEM) and in situ liquid-cell TEM. Results demonstrate that the binding of Cu2+ to DNA results in the bending of the DNA strand and provides a site for the nucleation and growth of copper crystals. The arrangement of the copper crystals along the curved DNA strand correlates with the guanine arrangement on the DNA sequence. This research provides a direct observation of the DNA-Cu2+ complex at the nanometer scale and contributes to further understanding the interaction mechanism, benefiting biomedical research.
Proceedings Paper
Engineering, Electrical & Electronic
Yuheng Huang, Meng Nie, Binghui Li, Kuibo Yin, Litao Sun
Summary: This study presents a miniaturized micro-electro-mechanical system (MEMS) device with a standard SOI process for in-situ scanning electron microscopy or transmission electron microscopy (SEM/TEM) test of nanomaterials. The device integrates a thermal actuator, a four-probe electro-mechanical coupled test platform, and a capacitive sensor. Experimental results using the device show that the resistance of Pt nanobeam fabricated by focused ion beam induced deposition increases with strain, with Young's modulus and fracture strength of 84.24 GPa and 3.66 GPa, respectively. The proposed MEMS device is expected to facilitate the in-situ test of 1D/2D nanomaterials.
2023 IEEE 36TH INTERNATIONAL CONFERENCE ON MICRO ELECTRO MECHANICAL SYSTEMS, MEMS
(2023)
Article
Chemistry, Physical
Yuheng Huang, Kuibo Yin, Binghui Li, Anqi Zheng, Bozhi Wu, Litao Sun, Meng Nie
Summary: “In this study, a novel on-chip microelectromechanical system (MEMS) for in situ quantitative mechanical testing of nanostructures under tension-compression functions is reported. The mechanical properties of three nanostructures fabricated by focused ion beam (FIB) techniques were systematically investigated using this testing system. Results showed that Pt nanopillars and C nanowires exhibited plastic deformation behavior under tension testing, while their mechanical deformation mechanisms changed in compression tests.”
NANOSCALE HORIZONS
(2023)
Article
Energy & Fuels
Haiyang Jia, Chen Zhu, Jiawei Sun, Wanying Liu, Jian Shao, Xiaosong Liu, Lingchang Wang
Summary: Hydroxyl-rich porous carbons were synthesized using sucrose as a precursor through concentrated sulfuric acid pre-carbonization and thermochemical activation. KOH was found to be the most effective activating agent, resulting in carbon materials with high specific surface area and pore volume. The resulting carbon materials demonstrated promising electrochemical properties in basic aqueous electrolyte.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Engineering, Environmental
Jiawei Sun, Yuwei Xiong, Haiyang Jia, Longxiang Han, Kuibo Yin
Summary: In this study, a superhydrophilic graphene oxide (GO) membrane was prepared by depositing GO on a microfiltration substrate. Laser bombardment was used to reduce the lamellar size of GO and create defects and wrinkles, resulting in improved filtration permeance and efficiency for microplastics. The membrane showed excellent performance even after repeated use, making it suitable for practical applications in long-term microplastic separation.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
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)
