Article
Nanoscience & Nanotechnology
Pimchanok Ieamviteevanich, Wiyada Mongkolthanaruk, Kajornsak Faungnawakij, Ehsan Daneshvar, Amit Bhatnagar, Supree Pinitsoontorn
Summary: Biomass-based carbon aerogels have gained attention as effective and low-cost oil sorbents or oil/water separators. This study successfully fabricated magnetic carbon nanofiber (MCF) aerogels and investigated the effect of pyrolysis temperature on their properties. The MCF aerogels pyrolyzed at 700 degrees C exhibited the most desirable oil sorption capacity and hydrophobic properties.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Applied
Deeptanshu Sivaraman, Gilberto Siqueira, Anjani K. Maurya, Shanyu Zhao, Matthias M. Koebel, Gustav Nystroem, Marco Lattuada, Wim J. Malfait
Summary: Cellulose aerogels have the potential to be alternatives to silica aerogels with advantages in cost, sustainability, and mechanical properties. However, the density dependence of thermal conductivity for cellulose aerogels remains controversial. Experimental results show that the density of cellulose aerogels affects the thermal conductivity, with compressed aerogels having lower thermal conductivity due to the alignment of nanofibers.
CARBOHYDRATE POLYMERS
(2022)
Article
Polymer Science
Ozlem Bingol Ozakpinar, Havva Dastan, Merve Gurboga, Fatih Serdar Sayin, Derya Ozsavci, Elif Caliskan Salihi
Summary: Colorectal cancer (CRC) is a common and deadly cancer, and vitamin D (VD) plays a crucial role in its development, progression, prognosis, and treatment. Recent studies have found that low serum VD levels are associated with an increased risk of CRC. This research focused on the development of composite aerogels loaded with VD using carbon nanofibers (CNFs) as a drug delivery system for colon cancer cells. The findings showed that these aerogels effectively delivered VD to the colon cancer cells and inhibited cancer cell proliferation and migration.
Review
Energy & Fuels
Kisan Chhetri, Subhangi Subedi, Alagan Muthurasu, Tae Hoon Ko, Bipeen Dahal, Hak Yong Kim
Summary: This article provides an overview of the development of nanofibrous aerogels, focusing on carbon and polymer nanofiber reinforced aerogels, and their potential and applications in energy conversion and storage. The review summarizes the manufacturing techniques, properties, and challenges, and discusses future perspectives.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Nanoscience & Nanotechnology
Yubo Zou, Zeyu Chen, Xu Guo, Zhiyuan Peng, Chuying Yu, Wenbin Zhong
Summary: This study presents a method for preparing graphene-based aerogels with excellent mechanical strength, elasticity, and compressibility, and demonstrates their potential application as pressure sensors.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Hong Li, Xinxin Shu, Peiran Tong, Jihui Zhang, Pengfei An, Zhengxing Lv, He Tian, Jintao Zhang, Haibing Xia
Summary: Fe-Ni ANC@NSCA catalysts anchored on N, S co-doped carbon aerogel were successfully prepared by optimal pyrolysis of polyaniline aerogels derived from the freeze-drying of PANI hydrogels obtained by the polymerization of aniline monomers in the co-presence of tannic acid, Fe3+, and Ni2+ ions. These catalysts showed excellent performance in both oxygen reduction reaction and oxygen evolution reaction, surpassing state-of-the-art commercial catalysts.
Article
Chemistry, Multidisciplinary
Nadia Ahmadi Heidari, Milad Fathi, Nasser Hamdami, Hesam Taheri, Gilberto Siqueira, Gustav Nystrom
Summary: This study presents the utilization of cellulose nanofibers extracted from brewery spent grains as a sustainable nanomaterial for thermally insulating aerogels. Brewery spent grains, which are typically disposed of or sold as animal feed at low prices, have been overlooked for their potential valorization. Cellulose nanofiber aerogels were successfully produced from brewery spent grains for green thermal insulation applications.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Physical
Leitao Cao, Xi Yu, Xia Yin, Yang Si, Jianyong Yu, Bin Ding
Summary: Composite nanofiber aerogels with a hierarchical maze-like structure show enhanced low-frequency sound absorption capability compared to traditional fiber aerogels. They offer excellent sound absorption performance, lightweight properties, and robust mechanical properties, making them a potential choice for sound absorption applications in vehicles, buildings, and indoor environments.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Biochemistry & Molecular Biology
Marcelina Kubicka, Monika Bakierska, Krystian Chudzik, Michal Swietoslawski, Marcin Molenda
Summary: Graphite is considered leading and unrivaled among all advanced anode materials, but it falls short in specific capacity. Research efforts have shifted towards exploring novel carbonaceous materials with desired properties produced from natural, renewable resources to address these limitations.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Review
Materials Science, Multidisciplinary
Xinwang Cao, Chang Ma, Lei Luo, Lei Chen, Hui Cheng, Raphael Simha Orenstein, Xiangwu Zhang
Summary: The addition of nanofiber materials to Li-ion batteries has been a significant advancement, as it provides unique structural features and enhances their electrochemical performance. This article discusses recent advancements in nanofiber materials for Li-ion batteries, including the synthesis, structure, and properties of nanofiber cathodes, anodes, separators, and electrolytes, as well as their applications. The challenges and prospects of nanofiber materials in Li-ion battery applications are also outlined.
ADVANCED FIBER MATERIALS
(2023)
Review
Biotechnology & Applied Microbiology
Mariangela Guastaferro, Ernesto Reverchon, Lucia Baldino
Summary: This study analyzed drug delivery systems formed by polysaccharide-based aerogels, particularly focusing on the promising technique of supercritical CO2 assisted drying to produce nanostructured bio-aerogels. This technique allows for maintaining the starting gel volume and shape while removing cross-linking agent residues, making these advanced devices safe and suitable for controlled drug delivery applications.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2021)
Article
Materials Science, Ceramics
Baojie Zhang, Yun Liu, Qiaoxin Wu, Miao Zhou, Dong Su, Huiming Ji, Xiaolei Li
Summary: This study successfully developed a novel closed-cell/nanowire structured ceramic nanofiber aerogel by combining electro-spinning technology and solvothermal synthesis method. By using hollow TiO2 spheres as pore-making material and infrared opacifier, and incorporating in-situ grown TiO2 nanowires on the fiber surface, the aerogel exhibits high mechanical robustness, low density, and ultralow thermal conductivity.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Engineering, Environmental
Songjiu Han, Qirui Wu, Jundong Zhu, Jiayu Zhang, Anbang Chen, Yujia Chen, Xiaoxiang Yang, Jianren Huang, Lunhui Guan
Summary: In this study, a sodium alginate (SA) bonded MXene nanosheets and polydimethylsiloxane (PDMS) reinforced SA/MXene/PDMS (SMP) composite aerogel was prepared. The aerogel exhibited excellent conductivity, mechanical elasticity, thermal insulation, and hydrophobicity. It showed high sensitivity, reversible compression, and fatigue resistance, making it suitable for various applications such as pulse beating, sound detection, and human health monitoring. Additionally, the aerogel sensor based on MXene can detect low to high-frequency vibration signals, making it useful for engineering applications.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Sara Sadat Fazel, Mehdi Jonoobi, Kambiz Pourtahmasi, Sima Sepahvand, Alireza Ashori
Summary: The study aimed to enhance the oil adsorption capacity of cellulose nanofibers (CNFs) by modifying their surface. The optimal concentration of hexadecyltrimethoxysilane (HDTMS) modifier was found to be 2 mL, which provided the highest pressure resistance and good oil adsorption capacity.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2023)
Article
Materials Science, Multidisciplinary
Naoki Okada, Kohei Sato, Moegi Yokoo, Erina Kodama, Shinji Kanehashi, Takeshi Shimomura
Summary: Aerogels containing P3HT nanofibers in a PS matrix were fabricated by freeze-drying and doped with iodine vapor. The aerogels exhibited low thermal conductivity and high Seebeck coefficient, showing potential for thermoelectric applications. The relationship between Seebeck coefficient and conductivity varied at different dopant concentrations, with a giant Seebeck coefficient attributed to unique morphology and energy filtering effects.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Engineering, Environmental
He Xiao, Shoufeng Xue, Jingjuan Zhang, Man Zhao, Jianchun Ma, Shuai Chen, Zhanfeng Zheng, Jianfeng Jia, Haishun Wu
Summary: A facile electrolysis-solvothermal technique was demonstrated for making Pt and carbon quantum dots coloaded multiwall carbon nanotube catalyst with ultralow Pt amount but ultrahigh electroactivity and durability. The Pt nanoparticles with intrinsic structure played a key role in the excellent catalytic performance for hydrogen evolution reaction (HER) and ethanol oxidation reaction (EOR), with the assistance of CQDs providing anchoring points for Pt NPs and constructing a 3D conductive network with MWCNT supporter.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Nanoscience & Nanotechnology
Yuan Li, Yan Guo, Sufang Yang, Qibiao Li, Shuai Chen, Baoying Lu, Houbing Zou, Xingchen Liu, Xili Tong, Hengquan Yang
Summary: Lowering the energy barrier of water dissociation is crucial for efficient hydrogen evolution in alkaline conditions. Mesoporous RhRu nanosponges exhibit enhanced water dissociation behavior and high HER activity in 1.0 M KOH, surpassing commercial Pt/C catalysts and comparable to classic Pt/metal (hydro)oxide catalysts. The charge redistribution on RhRu alloy surfaces enables tuning of the Ru d-band center, promoting water molecule adsorption and dissociation, contributing to the remarkable alkaline HER activity on the RhRu catalyst surface.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Xuezheng Yu, Shoujuan Lai, Shishan Xin, Shuai Chen, Xiaoli Zhang, Xilin She, Tianrong Zhan, Xiaoliang Zhao, Dongjiang Yang
Summary: The study reveals that defective graphene substrate can efficiently adjust the charge distribution of attached monolayer iron phthalocyanine, leading to improved oxygen reduction reaction performance. The hybrid of exfoliated monolayer iron phthalocyanine and defective graphene exhibits outstanding electrocatalytic performance in alkaline electrolytes.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Inorganic & Nuclear
Fen Qiu, Jinghui Shi, Manman Guo, Shuai Chen, Jianhui Xia, Zhang-Hui Lu
Summary: The Fe2O3 nanoparticle decorated NiO nanosheet composite obtained by electrochemical exfoliation method showed high catalytic performance with a high BET surface area. The morphology and catalytic activity of the nanocomposite were influenced by the Fe/Ni molar ratio. The introduction of Fe2O3 nanoparticles improved charge transport, electrochemically active surface area, and release of oxygen bubbles.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Physical
Jingjing Li, Shuai Chen, Mengmeng Liu, Zhihong Li, Zhengping Dong, Fengwei Zhang, Xian-Ming Zhang
Summary: The study successfully prepared a high-performance Co@NCNTs catalyst by self-template pyrolysis of a cobalt dicyanamide molecule, embedding Co NPs and CoNx active sites uniformly in NCNTs, showing excellent catalytic activity and selectivity for the hydrogenation of nitrobenzene.
Article
Chemistry, Physical
Shuai Chen, Dongmei Huang, Dongyan Liu, Haizhen Sun, Wenjun Yan, Jiancheng Wang, Mei Dong, Xili Tong, Weibin Fan
Summary: Controllable hollow NiCo2O4 nanoparticles with interconnected hierarchically porous structure and abundant oxygen vacancies were successfully constructed via a simple template-free solvothermal method and heat treatment. These hollow and porous NiCo2O4 nanoparticles exhibit outstanding performance in various electrochemical reactions, showcasing potential applications in fuel cells.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Physical
Fengwei Zhang, Jingjing Li, Peizhi Liu, Huan Li, Shuai Chen, Zhihong Li, Wen-Yan Zan, Junjie Guo, Xian-Ming Zhang
Summary: This study presents a novel method utilizing a hard template-assisted spatial confinement strategy to prepare Co SSCs embedded in N-doped graphene-like carbon with high loading and easily controllable microstructure, surface area, and Co loading. The optimized catalyst shows excellent performance in transfer hydrogenation reactions, paving the way for the design and construction of efficient and high-loading non-noble metal SSCs.
JOURNAL OF CATALYSIS
(2021)
Article
Materials Science, Multidisciplinary
Yanxi Qin, Xiaobo Yang, Rongyu Li, Shuai Chen, Yunwei Wang, Zhimin Yu, Yingyong Wang, Xingchen Liu, Xili Tong
Summary: The research involves coating carbon nanoparticles with a SiO2 thin-layer to create the Pt/SiO2-C catalyst, which exhibits excellent ORR activity and anti-poisoning ability in acidic media.
MATERIALS RESEARCH BULLETIN
(2021)
Article
Chemistry, Applied
Conor J. Crawford, Yan Qiao, Yequn Liu, Dongmei Huang, Wenjun Yan, Peter H. Seeberger, Stefan Oscarson, Shuai Chen
Summary: It has been demonstrated in this study that there is wide variability in the efficiency of commercial sources of palladium on carbon (Pd/C), leading to significant differences in selectivity, reaction times, and yields. The physicochemical properties of efficient catalysts for hydrogenolysis were identified as small particle size of Pd/PdO, homogeneous distribution of Pd/PdO on the carbon support, and the oxidation state of palladium, which are good predictors of catalytic efficiency. Chemists can now identify and predict a catalyst's efficiency prior to the use of valuable synthetic material and time.
ORGANIC PROCESS RESEARCH & DEVELOPMENT
(2021)
Article
Green & Sustainable Science & Technology
D. Zheng, C. Lv, X. Zhang, S. Chen, H. Liu, Y. Sun, X. She, D. Li, D. Yang
Summary: A RuP3-CoP NS HER electrocatalyst was developed using an icetemplating method, showing efficient activity and stability over a wide pH range with only about 15 wt.% loading of Ru species.
MATERIALS TODAY SUSTAINABILITY
(2021)
Article
Chemistry, Physical
Xiaojing Cui, Shuai Chen, Huanhuan Yang, Yequn Liu, Huifang Wang, He Zhang, Yanfeng Xue, Guofu Wang, Yulan Niu, Tiansheng Deng, Weibin Fan
Summary: By dispersing a commercial Cu/ZnO/Al2O3 catalyst on a silica support, it was found that the distance between Cu nanoparticles on silica can affect the selectivity of methanol production in CO2 hydrogenation, this distance effect was confirmed through various experimental methods.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Engineering, Environmental
Gaolian Zhang, Guiqing Huang, Chen Yang, Shuai Chen, Yan Xu, Shuchao Zhang, Ping Lu, Jin Sun, Yukun Zhu, Dongjiang Yang
Summary: Fabricating P-doped TiO2 nanotube arrays can enhance the efficiency of photoelectrocatalytic degradation of antibiotics residues, primarily by improving light absorption and charge transfer efficiency.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Environmental
Dandan Li, Tan Li, Genyan Hao, Wenjun Guo, Shuai Chen, Guang Liu, Jinping Li, Qiang Zhao
CHEMICAL ENGINEERING JOURNAL
(2020)
Article
Chemistry, Multidisciplinary
Yan Guo, Shuai Chen, Yuan Li, Yunwei Wang, Houbing Zou, Xili Tong
CHEMICAL COMMUNICATIONS
(2020)
Article
Electrochemistry
Meiqing Guo, Jiajun Chen, Xiao Liu, Weijia Meng, Xiaogang Zhang, Genwei Wang, Zhongchao Bai, Shuai Chen, Zhihua Wang, Fuqian Yang
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2020)
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)
