Article
Electrochemistry
Du Huang, Zhenya Lu, Qian Xu, Xingyue Liu, Wenbin Yi, Junning Gao, Zhiwu Chen, Xin Wang, Xiaoyi Fu
Summary: In this study, a flexible supercapacitor electrode with a core-shell structure is prepared, leading to improved specific capacitance and cycling stability. The electrode consists of 3D TiO2 nanoflowers, Au thin film, and MnO2 nanowires, with a porous Ti conductive substrate. The combination of these materials opens up possibilities for developing flexible asymmetric supercapacitors.
ELECTROCHIMICA ACTA
(2022)
Article
Engineering, Environmental
Yang Song, Minjing Shang, Junguo Li, Yuanhai Su
Summary: A slug-based microreactor system was utilized to integrate the redox reaction between KMnO4 and MnSO4 with the chemical oxidative polymerization of pyrrole, resulting in the preparation of MnO2/PPy composite with a typical core-shell structure. The morphology of the composite material was significantly influenced by the molar ratio and residence time, showing a competition between pyrrole polymerization and MnO2 crystallization. The electrochemical performance of the core-shell composite material was enhanced, demonstrating the synergistic effect between MnO2 and PPy.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Jinhe Wei, Fei Hu, Xiong Shen, Bingkun Chen, Lin Chen, Zhongming Wang, Chenglong Lv, Qiuyun Ouyang
Summary: The vertically oriented NiCo2S4/MnO2 core-shell nanocomposites, activated by oxygen vacancy engineering, show enhanced electrochemical performance. The hierarchical core-shell nanostructures increase conductivity and provide redox chemical reactions. The NiCo2S4/MnO2-60 electrode delivers appreciable areal capacity and rate capability, and can be used in solid-state hybrid supercapacitors with high energy density and cyclic stability.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Analytical
Lin Tong, Chunxia Wu, Junxian Hou, Xiaoliang Zhang, Jiayuan Yan, Zehu Wang, Yanming Wang, Jingbo Mu, Zhixiao Zhang, Hongwei Che
Summary: This study successfully synthesized Fe3O4@PPy@MnO2 nanocomposites with porous core and double-shell layers, and utilized them as supercapacitor electrode materials. The prepared composite electrode material showed high specific capacitance and excellent cycling stability, demonstrating great potential for high-performance supercapacitors.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Bathula Babu, Sunil Babu Eadi, Jihyung Yoo, Hi-Deok Lee, Kisoo Yoo
Summary: A novel composite supercapacitor electrode material, ZnWO4 nanorods decorated with colloidal SnO2 quantum dots, was synthesized via a facile sonochemical method. The successful construction of core@shell nanorods was confirmed through systematic characterization. SnO2 surface encapsulation on ZnWO4 nanorods improves electrochemical performance by enhancing conductivity and adding storage sites. The synthesized material displayed a specific capacitance of 162 F/g and 98% capacity retention after 5000 cycles.
Article
Nanoscience & Nanotechnology
Zhao Zhuang, Wenjiao Wang, Yudi Wei, Tingxi Li, Mingliang Ma, Yong Ma
Summary: A hierarchical PANI/MnO2 core/shell nanostructure was successfully constructed through in situ polymerization, effectively increasing active surface areas and decreasing ion transmission distance. The nanostructure exhibited better electrochemical activity and higher capacitance performance compared to pure PANI nanorods and pure MnO2.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2021)
Article
Chemistry, Analytical
Congmei Yue, Boyang Hu, Wenjing Huang, Aifeng Liu, Zengcai Guo, Jingbo Mu, Xiaoliang Zhang, Xiaoyan Liu, Hongwei Che
Summary: In this work, PPy@CoP core-shell heterogeneous nanostructures are grown directly on Ni foam using a two-step electrochemical synthesis method, showing superior electrochemical and cycling performance for high-performance supercapacitor applications. The rational design of heterostructures based on PPy and metal phosphides offers new insights for the development of high-performance SCs.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Materials Science, Multidisciplinary
Fei Hu, Ting Li, Tianbiao Sun, Yidan Liu, Dongqi Yu, Rongrong Jia, Liyi Shi, Lei Huang
Summary: This work presents a controllable, green, and facile strategy for preparing Au NRs@MnO2 core/shell nanosheets using the LSPR effect of gold nanorods. MnO2 is obtained through the reduction of KMnO4 with photoelectrons induced by the LSPR effect. Methanol is found to be significant in maintaining the shape of Au nanorods by acting as a hole scavenger, and the OER performance of the resulting Au NRs@MnO2 is notably enhanced under proper irradiation and stable after 1000 cycles.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Jeannie Z. Y. Tan, Stelios Gavrielides, M. Mercedes Maroto-Valer
Summary: Propylene carbonates are important solvents and feedstocks, and their sustainable production using CO2 and solar energy is crucial. Developing microstructured photocatalysts with desired properties plays a key role in efficient propylene carbonate production.
Article
Chemistry, Physical
Pranjala Tiwari, Dawid Janas, Ramesh Chandra
Summary: The hydrophilicity of electrodes and minimal resistive losses are crucial for designing an efficient asymmetric supercapacitor for aqueous systems. MnO2 and MoS2 thin film based heterostructures fabricated onto carbon nanotube sheets meet these conditions and offer high performance. The scalable manufacturing technique involving a unique combination of chemical and physical deposition techniques gives hierarchical core-shell heterostructure with high coulombic efficiency.
Article
Chemistry, Physical
Wonbin Seo, Dongwoo Kim, Shihyeong Kim, Habeom Lee
Summary: This study proposed a method to improve the electrochemical stability of Ag NW network electrodes and successfully demonstrated the direct electroplating of MnO2 on AACS NW network electrodes. A high-performance flexible solid-state supercapacitor was fabricated using the suggested core-shell NW network electrodes.
Article
Energy & Fuels
Shubhangi B. Bandgar, Madagonda M. Vadiyar, Chitra L. Jambhale, Zhibin Ye, Jin-Hyeok Kim, Sanjay S. Kolekar
Summary: This study reports the synthesis and fabrication of economically cheaper and binder-free hierarchical core-shell nanostructures of copper ferrite nanorods and nickel ferrite nanosheets, which exhibit superior electrochemical behavior and excellent cyclic life. By assembling electrode materials with this structure, next generation energy storage devices can be manufactured.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Chemistry, Physical
Luchi Wang, Xiaoman Wang, Jie Ouyang, Yuhang Guo, Wanning Xiong, Linlin Zhao, Mengyao Li, Ziheng Hua, Zejun Li, Kun Du, Cui Zhou, Yongfeng Luo
Summary: Polyaniline (PANI) nanomaterials or carbon nanotubes (CNTs) are synthesized on activated wood carbon (AWC) to obtain PANI@AWC and CNT@AWC. MnO2 nanosheets are then electrodeposited on PANI nanomaterials to form a core-shell structure. The introduction of PANI improves loading of MnO2, electrical conductivity, structural stability, and synergistic energy storage. Using the MnO2/ PANI@AWC composite electrode as an anode and CNT@AWC as a cathode, a high-performance all-solid-state supercapacitor is constructed with wide working voltage and high energy density.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Analytical
Narasimharao Kitchamsetti, Manopriya Samtham, Diwakar Singh, Ekta Choudhary, Sachin R. Rondiya, Yuan -Ron Ma, Russell W. Cross, Nelson Y. Dzade, Rupesh S. Devan
Summary: Novel hybrid core-shell electrodes consisting of 2D and 1D nanomaterials are developed to address the relatively lower specific energy of supercapacitors. These electrodes, composed of hierarchical 2D MnO2 nanoflakes and 1D NTO mesoporous rods, provide a large surface area and enhanced OH- ions diffusion. The hybrid porous core-shell hetero-architecture of MnO2@NTO delivers high specific capacitance, specific power, and specific energy, with good retention in capacitance after cycling.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Engineering, Multidisciplinary
Aitang Zhang, Ning Mao, Yuxue Zhong, Wen Zheng, Liang Cui, Colin Barrow, Joselito Razal, Wenrong Yang, Jingquan Liu
Summary: Freestanding electrodes made from hierarchical core-shell micro/nanostructured materials synthesized from redox-type metal oxides demonstrate great potential for portable electronic devices. The electrodes, based on petaloid and origami-lantern shaped nanosheets and 3D core-shell porous hierarchical structures, exhibit superior capability and energy density, showing promise for commercial applications in electrochemical energy storage.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Chemistry, Physical
X. Shi, S. Ahmad, K. Perez-Salcedo, B. Escobar, H. Zheng, A. M. Kannan
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2019)
Article
Chemistry, Inorganic & Nuclear
X. Shi, H. Zheng, A. M. Kannan, K. Perez-Salcedo, B. Escobar
INORGANIC CHEMISTRY
(2019)
Article
Chemistry, Physical
Suzanne Smith, Phophi Madzivhandila, Letta Ntuli, Petrone Bezuidenhout, Haitao Zheng, Kevin Land
Article
Acoustics
Haitao Zheng, Mphoma S. Matseke, Tshimangadzo S. Munonde
ULTRASONICS SONOCHEMISTRY
(2019)
Article
Acoustics
Tshimangadzo S. Munonde, Haitao Zheng, Philiswa N. Nomngongo
ULTRASONICS SONOCHEMISTRY
(2019)
Article
Materials Science, Multidisciplinary
Ntombizodwa M. Ncube, Haitao Zheng
MATERIALS RESEARCH EXPRESS
(2020)
Article
Green & Sustainable Science & Technology
Tshimangadzo S. Munonde, Haitao Zheng, Mphoma S. Matseke, Philiswa N. Nomngongo, Yi Wang, Panagiotis Tsiakaras
Article
Acoustics
Tshimangadzo S. Munonde, Haitao Zheng
Summary: Ultrasonication has significant effects on the physical properties and oxygen evolution reaction (OER) of NiFe LDH materials, with optimum OER activity achieved under conditions of 60% amplitude, 10 mg mL-1 concentration, and 15 minutes of sonication.
ULTRASONICS SONOCHEMISTRY
(2021)
Article
Chemistry, Physical
Mphoma S. Matseke, Haitao Zheng, Mkhulu K. Mathe, Emanuela Carleschi, Bryan Doyle
Summary: In this study, Co-doped MnFe2O4 electrocatalysts were found to have improved oxygen reduction reaction (ORR) performance, with MnFe1.5Co0.5O4/C electrocatalyst showing the best results. The Co doping resulted in smaller and more uniform particle sizes, more oxygen vacancies, enriched surface Mn3+ ions, and improved conductivity, all contributing to enhanced ORR activity compared to pristine MnFe2O4/C.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Mphoma S. Matseke, Hongze Luo, Lei Wen, Haitao Zheng
Summary: This study investigated the use of Co-substituted Fe in NiFe2O4 electrocatalysts to improve their activity towards the oxygen reduction reaction (ORR). The results showed that Co substitutions significantly increased the intrinsic activity of the NiFe2O4 electrocatalyst for ORR, as well as improved stability.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2022)
Article
Chemistry, Physical
Yuhang Ye, Han Chen, Yuchuan Ye, Huiqiu Zhang, Jing Xu, Luhui Wang, Liuye Mo
Summary: Highly dispersed CuO/SiO2 catalysts were successfully synthesized by a green process of ball milling. The copper phyllosilicate layer plays an important role in the stabilization of CuO during thermal pretreatment.
Article
Biochemistry & Molecular Biology
Xiaorong Cai, Yaning Wang, Shuting Tang, Liuye Mo, Zhe Leng, Yixian Zang, Fei Jing, Shaohong Zang
Summary: In recent studies, phase junctions constructed as photocatalysts have shown promising prospects for organic degradation with visible light. This study presents the design of an elaborate rhombohedral corundum/cubic In2O3 phase junction combined with polymeric carbon nitride (PCN) via an in situ calcination method. The performance of the MIO/PCN composites was evaluated through photodegradation experiments of Rhodamine B under LED light irradiation, showing excellent performance attributed to the intimate interface contact between MIO and PCN, which enhances charge separation efficiency.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Chemistry, Physical
Yue Jiang, Qing Wang, Jing Xu, Shaohong Zang, Liqiao Chen, Luhui Wang, Liuye Mo
Summary: A series of Ce1-XSnXO2 catalysts were synthesized and characterized for their physical and chemical structures. The Ce1-XSnXO2 catalysts exhibited high catalytic activity, with Ce-0.Sn-8(0).O-2(2) catalyst showing the best performance and stability.
Article
Energy & Fuels
Liuye Mo, Haitao Zheng
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)