Article
Materials Science, Multidisciplinary
Keyue Wu, Li Zhou, Chuanlong Mao, YiJun Chu
Summary: ZnO structures were synthesized by a two-step procedure: hydrothermal method with methanol as solvent followed by annealing in air. The structure and morphology were characterized by XRD and SEM, while the chemical composition was determined by XPS. The optical properties were investigated using fluorescence spectroscopy. The results emphasize the significant influence of reaction time on the morphology, chemical composition, and optical properties of ZnO.
Article
Chemistry, Applied
Jie Jiang, Guohong Wang, Yanchi Shao, Juan Wang, Shuang Zhou, Yaorong Su
Summary: Constructing a step-scheme heterojunction is an efficient way to optimize the performance of a photocatalytic system, and in this study, a ZnO@ZnS step-scheme photocatalyst was successfully prepared with superior performance and efficient charge carrier separation.
CHINESE JOURNAL OF CATALYSIS
(2022)
Article
Chemistry, Physical
Lequn Li, Chujun Yao, Li Wu, Kai Jiang, Zhigao Hu, Ning Xu, Jian Sun, Jiada Wu
Summary: In this study, the enhancement of UV emission of ZnO was achieved by covering the ZnO nanorods with a ZnS coating. The results showed that the NBE emission of ZnO was significantly enhanced after the ZnS coating, both at room temperature and reduced temperatures.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Materials Science, Ceramics
Yu-Sheng Tsai, Jyun-Rong Chen, Chang-Hsueh Lee, Chih-Chen Kuo, Ya-Hsuan Lin, Chun-Chieh Wang, Yu-Cheng Chang, YewChung Sermon Wu, Hsiang Chen
Summary: In this study, different types of ZnO-based nanocomposites were fabricated and characterized. The etching of ZnO nanorods increased the surface area and defect concentration, while sulfurization of the ZnO/ZnS nanotubes reduced defects and improved surface roughness. The results indicate that ZnO and ZnO/ZnS nanotubes hold promise for sensing device applications.
CERAMICS INTERNATIONAL
(2022)
Article
Nanoscience & Nanotechnology
Yogesh Waghadkar, Manish Shinde, Nilakantha Tripathi, Bhalchandra Pujari, Madhushree Bute, Ashif Tamboli, Norihiro Suzuki, Hassan Fouad, Chiaki Terashima, Hyosung Choi, Sunit Rane, Ratna Chauhan, Suresh Gosavi, Akira Fujishima
Summary: ZnO spheres were synthesized by solid state oxidation of ZnS microspheres at different temperatures. The ZnO spheres synthesized at 600 degrees C exhibited better photovoltaic performance due to higher surface roughness, allowing for enhanced dye loading and charge collection.
Article
Materials Science, Multidisciplinary
Tao Liu, Hailian Li, Minghui Xu, Yicun Yao, Jinjun Gu, Sumei Wang, Yong Liu, Weijin Kong, Zhixian Wei, Tiejun Wang, Mei Qiao
Summary: Well and barrier waveguides were fabricated in ZnS single crystals via Ni and Cu ion implantation. Elastic collisions between implanted ions and target nuclei were simulated using SRIM software. Dark-mode spectrum and near-field intensity distributions were measured using prism and end-face coupling methods at 633 nm. Absorption spectra and magnetic properties under 3T magnetic field were also investigated.
Article
Chemistry, Physical
Chenlin Wang, MinJu Ying, Jie Lian, MingYang Wei, Qingfen Jiang, Zhen Xu, Yu Zhang, Yueming Wang
Summary: In this work, ion implantation of Mn and As ions into ZnO films significantly altered their optical properties, leading to changes in refractive index and extinction coefficient. The presence of Mn ions also introduced a halfmetallic property to the ZnO films, resulting in gentler variations in optical characteristics. These findings suggest new possibilities for the design and optimization of optoelectronic devices utilizing ZnO thin films with semi-metallic properties.
APPLIED SURFACE SCIENCE
(2022)
Article
Environmental Sciences
Vijayan Selvaraj, Heba H. Mahboub, Umadevi Ganapathi, Senthil Kumar Chandran, Wedad Al-Onazi, Amal Mohammed Al-Mohaimeed, Tse-Wei Chen, Caterina Faggio, Balaji Paulraj
Summary: Pure ZnS and Al-doped ZnS nanoparticles were synthesized using the sol-gel method. The nanoparticles showed spherical structures and agglomerated forms. The crystal and phase structures as well as the functional groups were analyzed. The energy gap was calculated, and it was found that Al doping improved the photocatalytic activity of ZnS.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Jing Cai, Peifeng Liu, Junyu Lei, Yongliang Zhang, Yu Xiang, Xizhang Wang, Qiang Wu, Zheng Hu
Summary: 1D wurtzite (w-)ZnS nanostructures with specific crystallographic orientations can be synthesized using a solution-processed strategy. These nanostructures exhibit unique morphologies and tunable band-edge emission.
Article
Chemistry, Inorganic & Nuclear
Po-Hsuan Hsiao, Ta-Cheng Wei, Chia-Yun Chen
Summary: The study achieved a dual enhancement in photodetection performance and environmental stability by applying Cu2+-doped ZnS as protective coatings on ZnO nanorods, demonstrating a significant improvement in detectivity under light illuminations. Additionally, the designed photodetector showed good environmental stability during long-term utilization.
INORGANIC CHEMISTRY FRONTIERS
(2021)
Article
Materials Science, Multidisciplinary
Niranjan N. Prabhu, B. Rajendra, S. Anandhan, Krishna Murthy, R. B. Jagadeesh Chandra, Gibin George, B. Sachin Kumar, B. Shivamurthy
Summary: Aging populations and the increase in chronic diseases worldwide require efficient healthcare tools for simple, rapid, and accurate diagnosis and monitoring human health. Gas sensors, specifically metal oxide and ceramic nanofibers, produced through electrospinning, are being explored for potential use in gas sensors for engineering and medical sectors. This research aims to evaluate the effects of various parameters on the physical properties of zinc oxide nanofibers produced through electrospinning, including concentrations of poly(vinyl alcohol) (PVA) and zinc acetate dihydrate (ZnAc2), feed rate, voltage, spinneret tip-to-collector distance (TCD), and pyrolysis temperature.
MATERIALS RESEARCH EXPRESS
(2023)
Article
Materials Science, Multidisciplinary
Divyarajsinh Zala, Davit Dhruv, Faizal Mirza, Neeta A. Bhammar, Hardik Gohil, Himanshu Dadhich, Alpa Zankat, K. N. Rathod, Sanjay Kansara, A. D. Joshi, P. S. Solanki, N. A. Shah
Summary: In this study, CdO-ZnO core-shell nanoparticles were successfully synthesized and characterized using various techniques including XRD, FESEM, HRTEM, UV-Visible spectroscopy, Raman spectroscopy, and impedance spectroscopy. The results showed that the synthesized nanoparticles had a uniform structure, stable morphology, and specific optical and electrical properties.
Article
Chemistry, Multidisciplinary
Fan Ru, Jing Xia, Xuanze Li, Yifan Wang, Ze Hua, Ruiwen Shao, Xuecong Wang, Chun-Sing Lee, Xiang-Min Meng
Summary: In this study, well-aligned single-crystalline ZnO/ZnS core/shell nanorod arrays were successfully obtained by introducing an Al2O3 buffer layer. A rational growth mechanism of the core/shell heterostructure was proposed based on detailed characterization, showing that Al2O3 can effectively improve the optical properties of the ZnO/ZnS heterostructure.
Review
Biochemistry & Molecular Biology
Kunfeng Chen, Yunzhong Zhu, Zhihua Liu, Dongfeng Xue
Summary: LiNbO3 crystals are important dielectric and ferroelectric materials with a wide range of applications. Their physical and chemical properties are influenced by various factors, leading to enhanced performances in different fields. Traditional and non-traditional applications of LiNbO3 crystals have shown significant progress and potential for novel applications.
Article
Materials Science, Ceramics
Yan Li, Lin-Xi Shan, Xiao-Xue Lian, Qing-Jun Zhou, Dong-Min An
Summary: The novel mesoporous ZnO@ZnS core-shell heterojunction sensor shows excellent NO2 detecting properties with a low detection threshold. The enhanced gas-sensing performance of the ZS sensor is achieved by the combination effect of the Schottky barrier and its mesoporous structure, promising significant practical application prospects in NO2 detection and monitoring.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Multidisciplinary
Xiaowei Wang, Yuchen Sun, Wei-Chao Zhang, Xiang Wu
Summary: Rational design of electrode materials with core-shell nanostructures is important for improving the electrochemical performance of supercapacitors. In this study, several CuCo2O4 @Ni-Co-S composite electrodes were prepared, which showed high electrochemical activity as a result of their three-dimensional structure. The heterostructured materials exhibited a specific capacitance of 1048 C/g at 1 A/g, and maintained 75.6% of their initial capacity after 2000 cycles at 10 A/g. With a power density of 2280 W/kg, the device achieved an energy density of 79.2 Wh/kg.
CHINESE CHEMICAL LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Ying Liu, Yi Liu, Xiang Wu
Summary: With the rapid development of sustainable energy sources, aqueous zinc-ion batteries (AZIBs) have emerged as a highly promising energy storage technology. The construction of suitable electrode materials is crucial for improving the overall performance of AZIBs. Recent research has focused on the modification of vanadium-based cathodes, exploring defect engineering strategies such as oxygen defects, cation vacancies, and heterogeneous doping. The effects of these defects on the electrochemical performance of electrode materials are discussed, along with future challenges and development directions for V-based cathode materials.
CHINESE CHEMICAL LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Yuchen Sun, Xiaowei Wang, Xiang Wu
Summary: In supercapacitors, the synthesis of MoO42--intercalated LDH heterostructures can enhance the specific capacitance and energy density, potentially enabling their application in future energy storage devices.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Electrochemistry
Mengdi Wang, Xingyu Liu, Xiang Wu
Summary: Layered double hydroxides (LDHs) have potential as electrode materials for supercapacitors due to their unique spatial structures. In this study, several NiCo-LDH materials are obtained through a simple selenization process, improving conductivity and reducing electrochemical impedance. The 0.4Se-NiCo-LDH materials exhibit a specific capacitance of 1396 F/g at 1 A/g and a capacity retention rate of 91.38% after 10,000 cycles. Furthermore, when used as a positive electrode, an asymmetric supercapacitor achieves an energy density of 60 Wh/kg at a power density of 2700 W/kg, showing promising applications for future flexible energy-storage systems.
Article
Electrochemistry
Jingxuan Liu, Xiang Wu
Summary: Two-dimensional transition metal sulfides (TMDs) with various morphology and microstructure are synthesized via a facile hydrothermal process. The electrochemical tests demonstrate that the MoS2/Ni3S2 composites deliver higher theoretical capacity and superior cycling stability compared to their single counterparts. The capacitance of the MoS2/Ni3S2 sample reaches 810 C/g at 1 A/g. The hybrid supercapacitor assembled using these composites exhibits an energy density of 33.75 Wh/kg at 2700 W/kg and retains 78.57% of the initial capacitance after 10,000 cycles, showcasing their great potential in future flexible micro/nano energy systems.
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Xinyu Huai, Jingxuan Liu, Xiang Wu
CHINESE JOURNAL OF STRUCTURAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Shilong Li, Ming Zhao, Dongdong Zhang, Xiang Wu
Summary: Layered delta-MnO2 materials are considered to be ideal cathode materials for zinc ion storage, but the structural collapse during long cycling affects device performance. Preintercalation of cations is an efficient strategy to modulate the electrode structure and improve performance. In this study, K+ ion was introduced into the delta-MnO2 interlayer using a solvothermal route. The prepared samples delivered a capacity of 389 mA h/g at 0.2 A/g and maintained a capacity retention of 95% after 1000 charge/discharge cycles, demonstrating their important application prospects in the field of portable electronics.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Chemistry, Physical
Mengdi Wang, Xingyu Liu, Xiang Wu
Summary: It is crucial to design catalysts with unique spatial structures and excellent electrochemical performance. Although non-noble metal catalysts are less active than Pt-based ones, their catalytic ability can be enhanced by the synergistic effect of different components. In this study, several dendritic-like CoP@NiCo-LDH hetero-catalysts were synthesized using a multi-step growth route. The CoP@NiCo LDH-100 samples exhibited superior performance in OER and HER compared to commercial IrO2 (OER) and Pt/C (HER) in alkaline electrolyte. Density functional theory (DFT) calculation showed that the composites had low adsorption energy and tunable charge redistribution at the interface. The enhanced conductivity of the catalyst was confirmed by an increased Fermi-level PDOS value. The upward shift of the D-band center facilitated the desorption of intermediates and accelerated the hydrolysis dissociation process, leading to improved HER activity and reduced overall electrolysis voltage.
Editorial Material
Chemistry, Multidisciplinary
Xiang Wu
Article
Chemistry, Physical
Xingjie Sun, Dongdong Zhang, Ahmad Umar, Xiang Wu
Summary: In this study, wire-like ZnCo2O4 nanomaterials were synthesized through a hydrothermal route and subsequent calcination process. The samples exhibited a large specific surface area, which increased the active sites and shortened the ion diffusion channels. The assembled supercapacitor showed an energy density of 64 Wh kg(-1) at 2880 W kg(-1), and the capacitance could be maintained at 85% after 10,000 cycles at a current density of 2 A g(-1). The device demonstrated excellent mechanical stability when bent at various angles, indicating its potential application in portable energy storage devices.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Ying Liu, Yi Liu, Xiang Wu
Summary: Vanadium-based compounds with bi-phase coexisting CaV2O6/NaV6O15 nanobelt structures show enhanced electrical conductivity, improved zinc ion diffusion, and stronger structural stability, making them promising cathode materials for aqueous zinc-based batteries. The electrode materials deliver a specific capacity of 312 mAh g(-1) at 5 A g(-1) after 2000 cycles, and still maintain a capacity of 231 mAh g(-1) at 10 A g(-1) with a cycle life of 6500 times.
Article
Chemistry, Multidisciplinary
Xinyu Huai, Jingxuan Liu, Xiang Wu
Summary: It is crucial to design electrode materials with excellent electrochemical performances to overcome the limitations of low energy densities and poor cycling stabilities in supercapacitors. In this study, a NiMo2S4 sphere-like structure with a large specific surface area is synthesized and used as positive electrode materials in hybrid devices. The devices exhibit a capacitance of 150 C g(-1) at 1 A g(-1) and maintain 82.9% of the initial capacitance after 10,000 cycles, indicating their potential applications in wearable energy storage devices.
Article
Chemistry, Physical
Shiqi Zhao, Jingxuan Liu, Xiang Wu
Summary: Aqueous zinc-ion batteries (AZIBs) are advantageous in terms of safety, environmental friendliness, and large theoretical capacity. In this study, the use of VS4 nanosheets as cathode electrodes achieved excellent discharge capacity and rate performance.
Article
Chemistry, Applied
Yi Liu, Xiang Wu
Summary: In this study, a vanadium-based electrode material with abundant phase boundaries and oxygen defects was designed to improve the reaction kinetics and structural stability of aqueous zinc ion batteries. The assembled batteries showed high specific capacity and retention rate, and exhibited excellent mechanical stability.
JOURNAL OF ENERGY CHEMISTRY
(2023)
Review
Electrochemistry
Yi Liu, Ying Liu, Xiang Wu
Summary: Aqueous zinc-ion batteries (AZIBs) are considered as potential alternatives to lithium-ion batteries (LIBs) due to their safety, convenience, and environmental friendliness. However, the use of vanadium-based compounds as cathodes for AZIBs often leads to dissolution and large volume changes. The pre-insertion strategy of guest ions or molecules provides an effective solution to this problem.
BATTERIES & SUPERCAPS
(2023)
