Photochemical Fabrication and Performance of Polyaniline Nanowire/SnO2 Composite Photocatalyst

doi:10.7503/cjcu20200573

Abstract

Abstract:

A study on SnO₂/polymer composite photocatalytic materials was carried out. The polyaniline（PANI） nanowires with determined morphology were employed as composite units to control the formation and recombination of SnO₂ by a room temperature photochemical method to achieve PANI enhanced photocatalytic activity. PANI nanowires were directly dispersed in a mixed solution of SnSO₄ and H₂SO₄ to obtain PANI nanowire/SnO₂ nanoparticle composites by UV irradiation. The morphology and composition of the composites were analyzed， and it was found that the two components were interwoven and some particles grew directly on the nanowires. The photocatalytic activity of the composite under low power UV lamp was studied with rhodamine B solution as the target degradation pollutant. The results showed that PANI nanowires could obviously enhance the photocatalytic activity of the SnO₂， and the enhancement effect changed regularly with the growth time of SnO₂. The photocatalytic activity of the composite obtained in the optimal recombination time was nearly 3 times that of the pure SnO₂. By measuring and analyzing on the energy level structure and the photocataly-tic reaction process， it is considered that the formation of z-scheme heterojunction promotes the separation of photogenerated electrons-holes， and then enhances the photocatalytic activity of the material. The subsequent photochemical recombination SnO₂ with polymer nanomaterials with regular morphology as components is a new recombination mode. It has the characteristics of green， easy to operate and cheap， easy to regulate SnO₂ photocatalytic activity， and can promote SnO₂ application in the field of photocatalysis.

Key words: Tin dioxide, Polyaniline, Composite, Photochemical preparation, Photocatalysis

CLC Number:

O644

TrendMD:

YANG Sixian, ZHONG Wenyu, LI Chaoxian, SU Qiuyao, XU Bingjia, HE Guping, SUN Fengqiang. Photochemical Fabrication and Performance of Polyaniline Nanowire/SnO₂ Composite Photocatalyst[J]. Chem. J. Chinese Universities, 2021, 42(6): 1942.

Figures/Tables 6

References 32

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Photochemical Fabrication and Performance of Polyaniline Nanowire/SnO₂ Composite Photocatalyst

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