Article
Physics, Condensed Matter
Shu Wang, Ji-Bing Sun, Zhi-Xia Xiao, Ming-Xu Yang, Wei-Dong Shi
Summary: Doping 1 wt% Al89.5Cu9.7Fe0.8 alloy promotes the phase separation and microstructure evolution of Nd13.53Fe74.89Co5.54B6.04 alloy. Low-temperature annealing improves the disorder degree, reduces composition difference between phases, and results in the formation of small particles or nanoparticles.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Polymer Science
Tinoco Navarro Lizeth Katherine, Bednarikova Vendula, Kastyl Jaroslav, Cihlar Jaroslav
Summary: TiO2 aerogels doped with Ni, Co, Cu, and Fe were studied for their structure and photocatalytic activity in the decomposition of acid orange (AO7). The doped aerogels were evaluated and analyzed after calcination at 500°C and 900°C. XRD analysis showed the presence of anatase/brookite and rutile phases, along with other oxide phases from the dopants. SEM and TEM microscopy revealed the nanostructure of the aerogels, and BET analysis showed their mesoporosity and high specific surface area. Photocatalytic activity was assessed using UV spectrophotometry and photodegredation of AO7, with Ni-TiO2 and Cu-TiO2 aerogels calcined at 500°C exhibiting higher photoactivity coefficients than those calcined at 900°C.
Article
Chemistry, Physical
Munzali Musa, Xin Song, Xianglong Zhou, Wentao Jia, Tao Yuan, Tianyu Ma, Xiaobing Ren
Summary: Grain boundaries with sparse 1:5H precipitates are considered as the primary demagnetization sites in pinning-controlled 2:17-type Sm-Co-Fe-Cu-Zr permanent magnets, leading to poor magnetic properties. TEM investigations reveal that grain boundary regions contain larger 2:17R nanovariants, less SFs, and fewer defects-aggregated cell boundaries compared to grain interiors, indicating that early decomposition preferably occurs at grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Munzali Musa, Xianglong Zhou, Xin Song, Tao Yuan, Wentao Jia, Jingdong Wang, Tianyu Ma
Summary: This study investigates the influence of increasing iron content on the microstructure of high temperature permanent magnets Sm-Co-Fe-Cu-Zr, showing that higher iron content leads to increased 2:17R ordering degree and decreased stacking faults density, resulting in larger nanocell sizes.
Article
Materials Science, Multidisciplinary
R. Roy, S. K. Adhikari, J. Sannigrahi, K. Mandal, S. C. Das, P. Dutta, S. Pramanick, D. Khalyavin, D. T. Adroja, S. Chatterjee
Summary: The magnetic structure of Fe-doped MnNiGe alloys was explored through detailed neutron powder diffraction study. Both alloys exhibited incommensurate antiferromagnetic ordering in the low-temperature martensitic phase, with the modulation of the magnetic structures depending on the doping site of Fe. Additionally, the application of external pressure had a significant effect on both the martensitic transition temperature and low-temperature magnetic structure of the alloys.
Article
Chemistry, Physical
Shivani Jindal, Puneet Sharma
Summary: In this study, hydrothermally synthesized transition metal and rare earth doped ZnS nanoparticles were investigated for their structural, morphological, optical, and magnetic properties. The nanoparticles showed tunable optical band gaps and ferromagnetic nature, with potential applications in optoelectronic and spintronic devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Hongchang Wang, Pengqiang Hu, Zhengming Zhang, Dunhui Wang
Summary: Magnetostructural coupling materials have excellent magnetocaloric properties and are ideal candidates for magnetic refrigerants. By adding Co into the Ge site of Tb5Si2Ge2, a strong magnetostructural coupling can be achieved, significantly improving the magnetocaloric properties of the compound. Experimental results show that the magnetic entropy change and temperature-averaged entropy change are increased after Co doping, indicating an enhanced low-field magnetocaloric performance. Theoretical calculations also confirm a large lattice entropy change after the magnetostructural transformation. These findings demonstrate that Co doping can transform Tb5Si2Ge2 into an excellent magnetic refrigerant.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Aline Alves Oliveiraa, Marlon Ivan Valerio-Cuadros, Alex Soares De Brito, Lilian Felipe Silva Tupan, Reginaldo Barco, Flavio Francisco Ivashita, Andrea Paesano Jr
Summary: Monophasic nanoparticles of (In1-xFex)(2)O-3 were prepared by freeze-drying and heat treatment, where iron cations substituted for indium cations in the oxide matrix. Different magnetic behaviors were observed at varying temperatures, correlating with iron magnetic moments.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Burak Kivrak, Mustafa Akyol, Ahmet Ekicibil
Summary: This study investigates the structural and magnetic properties of pure and M-doped (M: Fe and Cu) MoS2 thin films. It is found that the introduction of Fe atoms into the main structure enhances the magnetization values and gives rise to ferromagnetic characteristics. On the other hand, Cu-doped samples exhibit strong diamagnetic characteristics. The results suggest that doping can significantly influence the magnetic properties of MoS2.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Materials Science, Multidisciplinary
Chen Wei, Jun Wang, Bowen Dong, Yujie Yan, Lin Wang, Yixuan He, Eric Beaugnon, Jinshan Li
Summary: In this study, ternary Cu52Co24Fe24 immiscible alloys were prepared with varying undercoolings and under a high magnetic field. The microstructure evolution and properties of the alloys were investigated. It was found that the addition of Fe promoted the demixing tendency of the Cu-Co-Fe ternary system during solidification. Under the influence of a high magnetic field, the samples exhibited a more dispersed minority phase, higher microhardness, and improved conductivity.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
Yuzhen Ge, Tangsheng Zou, Antonio J. Martin, Javier Perez-Ramirez
Summary: This study investigates the impact of highly dispersed metal oxides of Co-Cu, Cu-Fe, and Co-Fe m-FTS systems on the direct synthesis of higher alcohols (HA) and demonstrates the viability of ZrO2 as a promoter. The addition of ZrO2 significantly increases HA productivity, with the Cu(1)Co(4)@ZrO2-5 catalyst exhibiting a 2.5-fold increase compared to its ZrO2-free counterpart. The Co1Fe4@ZrO2-10 catalyst shows the most productive performance among similar systems.
Article
Chemistry, Multidisciplinary
Zhicheng Liu, Tian Zhang, Yan Lin, Hongrui Jia, Yaqun Wang, Yiyan Wang, Guoxin Zhang
Summary: Developing an inexpensive bifunctional electrocatalyst is crucial for generating scalable green hydrogen and achieving carbon neutrality. In this study, a versatile approach is proposed to synthesize highly N-doped binary FeCo-phosphides (N-FeCoP) with hierarchical superstructure, enabling enhanced water splitting electrocatalysis through high N/defect-doping, strong coupling interaction between Fe and Co components, and a 3D hierarchical superstructure. Electrochemical measurements demonstrate that N-FeCoP exhibits low overpotentials for hydrogen and oxygen evolution reactions. Remarkably, overall water splitting can be achieved on N-FeCoP using a commercial primary Zn-MnO2 battery. This synthesis strategy may inspire the development of other N-doped metal-based nanostructures for a wide range of electrocatalytic applications.
Article
Chemistry, Physical
Junnan Qu, Yi Du, Peihong Ji, Zhongfu Li, Nan Jiang, Xinyue Sun, Lu Xue, Haoyu Li, Guoliang Sun
Summary: Efficient photocatalyst design is crucial for enhancing photocatalytic performance, with photogenerated carrier separation efficiency being a key factor. Combining two-dimensional material construction with elemental doping can further improve the separation of photogenerated carriers.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Bruno G. F. Eggert, Erna K. Delczeg-Czirjak, Fernando Maccari, Susmit Kumar, Oliver Gutfleisch, Helmer Fjellvag, Bjorn C. Hauback, Christoph Frommen
Summary: A series of V1-x-Fe-Co-Ni-Al1+ x and V1-x-Fe-Co-Ni-Cu1+ x high entropy alloys with varying compositions have been investigated for magnetocaloric applications. The study reveals that the crystal structure and magnetic properties of the alloys are influenced by their compositions.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Ceramics
P. T. Tho, C. T. A. Xuan, N. Tran, N. Q. Tuan, W. H. Jeong, S. W. Kim, T. Q. Dat, V. D. Nguyen, T. N. Bach, T. D. Thanh, D. T. Khan, B. W. Lee
Summary: Cu, Co, and Ti elements were co-doped to SrFe12O19, and it was found that the microwave absorption performance of SrFe12O19 can be significantly improved through co-doping. All samples showed good microwave absorption performance in terms of reflection loss and effective absorption bandwidth, with one sample exhibiting the ability to cover multiple microwave frequency bands.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Environmental
Yingze Zhou, Zizhen Zhou, Long Hu, Ruoming Tian, Yuan Wang, Hamid Arandiyan, Fandi Chen, Mengyao Li, Tao Wan, Zhaojun Han, Zhipeng Ma, Xunyu Lu, Claudio Cazorla, Tom Wu, Dewei Chu
Summary: This study presents a hydrothermal method for synthesizing MnO2 electrocatalysts with optimized structural and electrochemical properties. By adjusting the hydrothermal time, the phase transition from polymorphic 8 to alpha-MnO2 can be induced. The alpha-MnO2 polymorph with oxygen vacancies shows better band-alignment tunability, leading to improved electrochemical performance.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Multidisciplinary Sciences
Yufei Zhao, Priyank Kumar, Xin Tan, Xinxin Lu, Xiaofeng Zhu, Junjie Jiang, Jian Pan, Shibo Xi, Hui Ying Yang, Zhipeng Ma, Tao Wan, Dewei Chu, Wenjie Jiang, Sean C. Smith, Rose Amal, Zhaojun Han, Xunyu Lu
Summary: This study presents the design of Pt atomic clusters supported on Co single atoms and N co-doped carbon to enhance hydrogen evolution catalysis. The catalyst exhibits a low overpotential and high activity compared to commercial Pt/C catalysts. The enhanced activity is attributed to the charge redistribution between Pt and O atoms, optimizing proton adsorption and hydrogen desorption.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Junjun Guo, Jianguo Sun, Long Hu, Shiwen Fang, Xufeng Ling, Xuliang Zhang, Yao Wang, Hehe Huang, Chenxu Han, Claudio Cazorla, Yingguo Yang, Dewei Chu, Tom Wu, Jianyu Yuan, Wanli Ma
Summary: In this study, the natural organic dye Indigo is found to be an efficient molecular passivator for improving the stability and crystallization of hybrid perovskite films. The Indigo molecule with bifunctional chemical passivation can enhance the morphology and reduce defects of the perovskite film, resulting in higher device efficiency and stability.
ADVANCED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Yulin Wang, Run Shi, Lu Shang, Lishan Peng, Dewei Chu, Zhaojun Han, Rui Zhang, Tierui Zhang, Geoffrey I. N. Waterhouse
Summary: This study investigates the electrocatalytic oxygen reduction reaction (ORR) activity of vertically grown graphene arrays on carbon paper (VG array) in alkaline media at high current densities. The VG array electrode demonstrates remarkable performance with a Faradaic efficiency of 94% and a H2O2 production rate of 61.3 mg h(-1) cm(-2) at 100 mA cm(-2). The interconnected network of graphene nanosheets and gas-liquid-solid three-phase interfaces contribute to the high activity and selectivity of the VG array electrode.
Article
Chemistry, Physical
Yunjian Liu, Tianyi Zeng, Guotai Li, Tao Wan, Mengyao Li, Xiaoyun Zhang, Meiqing Li, Mingru Su, Aichun Dou, Wensai Zeng, Yu Zhou, Ruiqiang Guo, Dewei Chu
Summary: A double coupling of surface coating and doping is used to improve the cycling performance and capacity retention of the single-crystal LiNi0.8Co0.1Mn0.1O2 cathode material. This study demonstrates the critical pathway for the further development of single-crystal ternary cathode materials.
ENERGY STORAGE MATERIALS
(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
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, Multidisciplinary
Tianyue Liang, Haowei Jia, Yingze Zhou, Jiajun Fan, Yeqing Xu, Yifan Hu, Lu Zhou, Caiyun Wang, Fandi Chen, Peiyuan Guan, Mengyao Li, Tao Wan, Michael Ferry, Dewei Chu
Summary: This study presents a facile electrodeposition method to fabricate binder-free Ni modified-MoS2 with superior hydrogen evolution reaction (HER) catalytic performance. The obtained material exhibits excellent HER performance attributed to the synergistic effect of the formed Ni-Mo-S composition, abundant active sites, and increased electrical conductivity.
NEW JOURNAL OF CHEMISTRY
(2022)
