阴极辉光放电电解制备纳米ZnO

doi:10.11896/cldb.22060298

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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.

Key words： cathode glow discharge electrolysis (CGDE) plasma ZnO nanoparticles

Published: 10 July 2024 Online: 2024-08-01

CLC number:

TQ132.41

Fund:National Natural Science Foundation of China (21961032) and the Natural Science Foundation of Gansu Province (21JR7RA130, 21JR7RA126).

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	Articles by authors
	LU Quanfang
	HAO Xiaoxia
	FENG Yan
	MA Xiaojuan
	WANG Bo
	YU Jie

Cite this article:

LU Quanfang,HAO Xiaoxia,FENG Yan, et al. Synthesis of ZnO Nanoparticles by Cathode Glow Discharge Electrolysis[J]. Materials Reports, 2024, 38(13): 22060298-7.

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http://www.mater-rep.com/EN/10.11896/cldb.22060298 OR http://www.mater-rep.com/EN/Y2024/V38/I13/22060298

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