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Date of Publication:2022-10-09

Journal:功能材料

Affiliation of Author(s):化工学院

Issue:9

Page Number:1573-1576

ISSN No.:1001-9731

Abstract:Different morphologies of uniform silver nanoparticles have been synthesized in large quantities by reducing silver nitrate (AgNO3) with ethanol and/or water in the presence of poly(vinylpyrrolidone) (PVP). The effects of the proportion of ethanol to water, the concentration of AgNO3and the reaction time on the shapes and sizes of silver nanoparticles have been studied. The obtained quasi-nanospheres, nanocubes and nanowires silver particles were characterized by XRD, SEM, TEM and UV-vis adsorption spectroscopy. In addition, the photocatalytic performance of the Ag/mesoporous titania was investigated by UV-light induced photocatalytic degradation of methyl orange. The results showed that both nanospherical (with the diameter distribution about 30-70 nm) and nanocubic (the diameter about 80-140 nm) Ag nanoparticles were found to significantly enhance the photocatalytic activity of mesoporous TiO2, and the smaller Ag particles exhibited the higher improved photocatalytic activity than the big ones.

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