Article
Chemistry, Physical
Chuansheng Chen, Yi Huang, Qun Fang, Guoping Qian
Summary: Sn-doping ZnMn2O4 porous microspheres with shell structure can enhance electrochemical performance by increasing crystal plane spacing. A Sn doping content of 0.5% leads to the highest specific capacitance and improved cycle stability in the chargedischarge process.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Wanjun Jiang, Shiyu Wu, Guorong Fan, Zongde Wang, Shangxing Chen, Yangping Wen, Peng Wang
Summary: Nitrogen, phosphorus co-doped hollow porous carbon microspheres (PRM-HPAs) were successfully developed as an oxidase-like electrocatalytic sensor for baicalin. The PRM-HPA showed excellent electrocatalytic ability and high sensitivity for the detection of baicalin.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Priyanka Mukherjee, Rupali Ipsita Mohanty, E. Bhavya, Sushree Pattnaik, Balamati Choudhury, Mamata Mohapatra
Summary: The authors successfully synthesized ZnMn2O4 microspheres and G@ZnMn2O4 using a facile hydrothermal process and subsequent calcination. These materials have been utilized for cost-effective electrochemical detection of As(III). Characterization techniques such as X-ray diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS) were employed to analyze the structural and morphological properties of the composites. Both ZnMn2O4 microspheres and G@ZnMn2O4 exhibited excellent electrocatalytic activity towards the reduction of As(III). The G@ZnMn2O4 modified electrode achieved a sensitivity of 12.528 mu Appb-1cm-2 with a lower detection limit (LOD) of 0.87 ppb within the range of 0.33 ppb-5.61 ppb.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Inorganic & Nuclear
Zhan Gao, Guo-ge Lu, Liu-cheng Cao, Zong-xiu Zhu, Ying-xin Li, Fu-xiang Wei, Zhe Ji, Yan-wei Sui, Ji-qiu Qi, Qing-kun Meng, Yao-jian Ren
Summary: Core-shell structured Mn2O3@ZnMn2O4/C hollow microspheres are reported as an ideal cathode material for AZIBs, addressing the problems of capacity decline and low-rate performance. Its application in AZIBs demonstrates satisfactory rate performance, high cycle stability, and excellent reversibility. With a high reversible capacity reaching 289.9 mA h g(-1) and maintaining 203.5 mA h g(-1) after cycling 700 times at 1000 mA g(-1), this material shows great potential for AZIBs.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Multidisciplinary
Gi Dae Park, Yun Chan Kang, Jung Sang Cho
Summary: Phase-pure ZnMn2O4 nanopowders and their aggregated microsphere powders were successfully obtained by a simple spray drying process followed by post-annealing. The optimized post-annealing temperature of 800 degrees C resulted in ZnMn2O4 nanopowders with high capacity and good cycle performance. The aggregated ZnMn2O4 microsphere exhibited improved cycle stability, with a capacity retention of 84% after the second cycle.
Article
Chemistry, Physical
R. Gherbi, M. Benamira, Y. Bessekhouad
Summary: Mg-doped spinel ZnMn2O4 was synthesized using a sol-gel method, and its textural, electrochemical, and photocatalytic properties were investigated. The results showed that with increasing Mg content, the specific surface area and porosity of the material increased, leading to improved photocatalytic performance and higher efficiency in degrading Methylene Blue.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Partha Bairi, Kausik Sardar, Madhupriya Samanta, Kausik Chanda, Kalyan Kumar Chattopadhyay
Summary: Integrating a high atomic percentage of nitrogen atoms into a graphitic carbon framework improves the performance of nanocarbon materials in oxygen reduction reaction activity and specific capacitance. The nitrogen-doped carbon prepared through high-temperature pyrolysis exhibits excellent properties including high specific surface area and cycling stability, making it promising for various applications.
MATERIALS CHEMISTRY FRONTIERS
(2021)
Article
Chemistry, Physical
Pu Zhou, Linping Zhong, Zhiyao Liu, Mengjiao Liu, Ting Zhou, Yan Zhao, Xin Lai, Jian Bi, Daojiang Gao
Summary: Porous ZnMn2O4 hollow microrods were prepared through a facile co-precipitation method followed by an annealing process. The optimal calcination temperature of 700 degrees C led to the best microstructure for high electrochemical performance as an anode material in lithium ion batteries. The unique architecture of ZnMn2O4 microrods played a crucial role in enhancing the reversible capacity and rate capability.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Ceramics
Cuixia Cheng, Fang Chen, Yinfang Cheng, Guosong Lai
Summary: In this study, hierarchical hollow microspheres of Bi2MoO6 were prepared and applied as an anode for lithium-ion batteries for the first time, showing superior electrochemical performance.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Lichun Xue, Yueqing Li, Wentao Lin, Feiming Chen, Guichan Chen, Dengjie Chen
Summary: Hollow porous V2O5 microspheres were obtained by a facile solvothermal method and exhibited good capacity, rate capability, and stability in lithium-ion batteries. The study also described the variation of charge-transfer and bulk resistances in different charge/discharge states and suggested the broad application of the prepared microspheres and electrode kinetics in developing efficient electrodes for LIBs.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Engineering, Environmental
Zhihui Lu, Zhongliang Hu, Li Xiao, Yujia Xie, Na Li, Liujiang Xi, Wenhao Chen, Jin Xiao, Yirong Zhu
Summary: This study proposes a novel N-doped carbon quantum dots (N-CQDs)/Ni-Co-Se hollow microspheres composite for hybrid supercapacitors (HSCs), which shows excellent rate performance and enables high energy density and power density in HSCs.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Electrochemistry
Jian Chen, Hansong Zuo, Chang-Qing Wang, Yuan-Chun Zhang, Wei-Wei Gao, Na Zhao, Yue Huang, Shuang Xiao
Summary: In this study, ZnMn2O4 anode material with excellent lithium storage performance was prepared using the carbon gel-combustion method and the hard template strategy. The ZnMn2O4 sample obtained has a hollow panpipe-like structure with rich pore characteristics. The material exhibits higher reversible capacity, excellent cycle stability, and rate capability, which can be attributed to its porous structure, small particle size, high specific surface area, high crystallinity, and special micro-nano structure.
ELECTROCHIMICA ACTA
(2022)
Article
Chemistry, Physical
Chunyi Peng, Rongchen Wang, Chao Yao, Junfeng Qiu, Xin Liu, Qiang Wang, Wei Wang
Summary: By high-temperature calcination treatment, spherical hollow Cu-doped Co/CoO/C microspheres were synthesized, with carbon nanotubes grown on the microsphere surface to form conductive networks. Controlling the calcination temperature allows for effective graphitization control and diverse electromagnetic performance.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Analytical
Yuzhi Ma, Jieru Guo, Yiting Chen, Yinhui Yi, Gangbing Zhu
Summary: The study successfully prepared copper/cobalt/nitrogen co-doped three-dimensional hollow nanocarbon spheres and demonstrated excellent sensing capabilities for phenolics with a wide linear range. The proposed methodologies are simple, low cost, environmentally friendly, and have important potential applications.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Physical
Feiran Chen, Qinru Wang, Xiaofeng Yang, Chao Wang, Hu Zang, Yingwen Tang, Tao Li, Baoyou Geng
Summary: Rechargeable zinc-ion batteries have gained attention as a future direction for large-scale energy storage due to their low cost, safety, environmental friendliness, and excellent electrochemical performance. In this study, hollow mesoporous ZnMn2O4/C microsphere cathode material with carbon nanotubes embedded in the shell was prepared for the first time using spray pyrolysis. The material showed high capacity retention and cycle stability, attributed to its hollow structure, excellent porosity, cationic defects, and the high electrical conductivity and strong adsorption of carbon nanotubes.
