AgIO3-modified AgI/TiO2 composites for photocatalytic degradation of p-chlorophenol under visible light irradiation

Journal of Colloid and Interface Science
Shuang SongJianmeng Chen

Abstract

Semiconducting silver iodate (AgIO(3)) was used to modify the visible light response of an AgI/TiO(2) (AIT) catalyst by a facile method. The uncalcined AIT (AITun) and AIT calcined at 200°C (AIT200) consisted of AgIO(3), AgI, and TiO(2) semiconductors, while that calcined at 450 °C (AIT450) was composed of AgI and TiO(2). The activity in p-chlorophenol (PCP) degradation under visible light irradiation using either AITun or AIT200 was much higher than that with AIT450, which was mainly attributed to the fact that the presence of AgIO(3) provided a new matching band potential. AIT200 exhibited better photocatalytic properties than AITun due to its higher crystallinity after calcination. Moreover, the high catalytic activity of AIT200 was maintained after five successive cyclic experiments under visible irradiation. Considering the effect of radical scavengers and N(2) purging on the photocatalysis process, we deduced that the probable pathway of PCP degradation was mainly a surface charge process, caused by valence band holes.

References

May 19, 2006·Journal of Colloid and Interface Science·Anil Kumar, Nupur Mathur
Mar 22, 2007·Langmuir : the ACS Journal of Surfaces and Colloids·Chun HuXuexiang Hu
Aug 10, 2010·Journal of Colloid and Interface Science·Zhenyi ZhangYichun Liu
Jan 29, 2011·Journal of Colloid and Interface Science·Shiyue QinWei Ma

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Citations

Sep 18, 2018·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·L A Betancourt-BuitragoF Machuca-Martínez
May 31, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Jianling HuFengping Wang
Jun 4, 2018·Environmental Science and Pollution Research International·John Steven Devia-OrjuelaFiderman Machuca-Martinez

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