The effect of Ag nanoparticles modification on photocatalytic properties of La-doped ZnO nanorods

Abstract

Abstract: Ag nanoparticles decorated by La-doped ZnO nanorods were prepared in this study by hydrothermal method followed by a photo-deposition process. Effects of La-doping content and Ag modification on the photocatalytic performance of ZnO nanorods were investigated by photocatalytic degradation of methyl orange (MO) solution. The experiment results show that the photocatalytic performance of ZnO nanorods is much enhanced by La-doping and the decoration of Ag nanoparticles. La-doping changes the crystal quality, and the formed La—O bond makes the intrinsic absorption edge red-shift and increases the absorption intensity. Simultaneously, La-doping improves the electron concentration and impurity level of ZnO crystal. The decoration of Ag nanoparticles on the surface of La-doped ZnO nanorods inhibits the recombination of photo-generated electrons and holes, and the exciton life is thereby prolonged. Ag decorated La-doped ZnO nanorods show more effective photocatalytic performance than that of pure ZnO nanorods.

Key words: Hydrothermal method, La-doped ZnO nanorods, Ag nanoparticles decoration, photocatalysis

CLC Number:

TB34

YU Fu-cheng, NAN Dong-mei, WANG Bo-long, LI Yuan-meng, LIU Zheng-yan, HE Ling. The effect of Ag nanoparticles modification on photocatalytic properties of La-doped ZnO nanorods[J]. Journal of Lanzhou University of Technology, 2021, 47(1): 28-35.

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