Synthesis of ZnO Nanoparticles by Cathode Glow Discharge Electrolysis
LU Quanfang1,2,*, HAO Xiaoxia1, FENG Yan1, MA Xiaojuan1, WANG Bo1, YU Jie1
1 College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China 2 Editorial Department of the University Journal, Northwest Normal University, Lanzhou 730070, China
Abstract: In this work, ZnO nanoparticles (ZnO NPs) were prepared by one-step method using cathode glow discharge electrolysis (CGDE) in 2.0 g/L Na2SO4 solution at 530—650 V discharge voltage, in which Zn foil and Pt needle point were served as anode and cathode, respectively. The structure, component and morphology of ZnO NPs were characterized by XRD, SEM, FTIR and XPS. The band gap energy of ZnO NPs was calculated based on UV-Vis DRS. The photocatalytic property of ZnO NPs for the degradation of MB was investigated by using UV-Vis. A possible preparation mechanism of ZnO NPs under CGDE was also proposed. The results showed that the ZnO NPs prepared at 580 V have a certain agglomeration, and adding PVP can reduce the agglomeration. The morphology of ZnO NPs is changed with the concentration of PVP and the applied voltage. At 530 V applied voltage and adding 0.003 1% PVP, spindle ZnO NPs with particle sizes of about 200 nm and band gap of 3.22 eV are successfully prepared by CGDE. Meanwhile, the particle size distribution widens with the increase of voltage. After 30 min UV irradiation, the degradation rate of ZnO with PVP increases from 78.5% to 87.3%, indicating that the photocatalytic property of ZnO NPs with PVP is markedly superior to that of ZnO NPs without adding PVP. The synthesis mechanism of ZnO NPs by CGDE is as follows: the anode Zn foil is oxidized to produce Zn2+, and then migrate to the cathode glow discharge region. After that, [Zn(OH)4]2- is generated by the reaction with the OH-produced in the plasma region and Zn2+. Finally, [Zn(OH)4]2- is transferred from the plasmas-liquid interface into the solution to form ZnO NPs.
通讯作者: *陆泉芳,西北师范大学学报编辑部编审,西北师范大学化学化工学院硕士研究生导师。2000年6月、2003年6月、2012年6月分别于西北师范大学化学化工学院获得学士、硕士和博士学位,主要从事低温等离子体化学、原子发射光谱分析、新能源材料化学、水处理技术等方面的研究工作。发表论文50余篇,其中包括Chemical Engineering Journal、Electrochimica Acta、Journal of Alloys and Compounds、Plasma Processes Polymer、Spectrochimica Acta Part B、Microchemical Journal、《化工学报》等。luqf@nwnu.edu.cn
引用本文:
陆泉芳, 郝小霞, 冯妍, 马晓娟, 王波, 俞洁. 阴极辉光放电电解制备纳米ZnO[J]. 材料导报, 2024, 38(13): 22060298-7.
LU Quanfang, HAO Xiaoxia, FENG Yan, MA Xiaojuan, WANG Bo, YU Jie. Synthesis of ZnO Nanoparticles by Cathode Glow Discharge Electrolysis. Materials Reports, 2024, 38(13): 22060298-7.
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2024, Vol. 38 
