g-C3N4/TiO2复合材料光催化降解布洛芬的机制

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Abstract

In this experiment, titanium trichloride was chosen as the titanium source of TiO₂ and dicyandiamide was selected as the precursor of g-C₃N₄ to prepare the g-C₃N₄/TiO₂ composites. The morphology, elements, and catalytic properties characterization of g-C₃N₄/TiO₂ were characterized by transmission electron microscope (TEM), X-ray diffraction (XRD) and ultraviolet-visible absorption spectrum(UV-vis). The results showed that TiO₂ could be attached on the surface of g-C₃N₄ well. The doping ratio 1:9 of C₃N₄ and TiO₂ showed the highest photocatalytic activity on the degradation of IBU due to the red-shift of the catalyst. The photocatalytic degradation of IBU followed pseudo-first-order kinetics. Acidity increased the photocatalytic degradation of IBU. The quenching experiment demonstrated that the contribution rate of ·OH was 73.7%, indicating that ·OH played a major role in the photocatalytic degradation of IBU.

Key words： ibuprofen g-C₃N₄/TiO₂ photocatalytic degradation first-order kinetics reactive oxygen species

Received: 15 May 2016

PACS:

X703

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	Articles by authors
	SU Hai-ying
	WANG Ying-fei
	WANG Feng-liang
	SU Yue-han
	CAI Zong-wei
	LIU Guo-guang
	Lü Wen-ying
	YAO Kun
	LI Fu-hua
	CHEN Ping

Cite this article:

SU Hai-ying,WANG Ying-fei,WANG Feng-liang等. Preparation of g-C₃N₄/TiO₂ composites and the mechanism research of the photocatalysis degradation of ibuprofen[J]. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(1): 195-202.

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http://manu36.magtech.com.cn/Jweb_zghjkx/EN/ OR http://manu36.magtech.com.cn/Jweb_zghjkx/EN/Y2017/V37/I1/195

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