Gel-Network Controlled Synthesis of ZnO Nanoparticles and Their Photocatalytic Activities

doi:10.7517/j.issn.1674-0475.2009.03.207

Abstract

Abstract: ZnO nanoparticles have been prepared by means of a novel gel-network controlled synthesis method using gelatin as a template at lower temperature condition.The products were characterized by using TG-DTA,XRD,TEM,BET,UV-Vis and HPLC techniques.The products appeared to be regularly spherical or elliptical and their sizes range from 20 to 40 nm.The average particle size increased with increasing calcining temperature,and decreased with increasing gelatin concentration.Furthermore,photodegradation of Rhodamine B in aqueous solution was also investigated by using the ZnO nanopowders as the photocatalyst.It was found that the product(13% gelatin concentration) calcinated at 350 ℃ for 2 h nearly induced 99.9% degradation of Rhodamine B in 1 h.

Key words: ZnO nanoparticles, gel-network controlled synthesis, photocatalytic activity, Rhodamine B

CLC Number:

O614

WANG Ying-ling, XIE You-hai, LIU Guo-guang, ZHOU Jian-guo, ZHOU Qing-xiang. Gel-Network Controlled Synthesis of ZnO Nanoparticles and Their Photocatalytic Activities[J]. Imaging Science and Photochemistry, 2009, 27(3): 207-214.

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