Reversible redox behavior of Fe2O3/TiO2 composites in the gaseous photodegradation process

doi:10.1016/j.ceramint.2019.03.255

SIC OpenIR

	Reversible redox behavior of Fe2O3/TiO2 composites in the gaseous photodegradation process
	Dai, Xueping; Lu, Guanhong; Hu, Yidan; Xie, Xiaofeng; Wang, Xiao; Sun, Jing
	2019-07-01
Source Publication	CERAMICS INTERNATIONAL
ISSN	0272-8842
Volume	45 Issue:10 Pages:13187
Subtype	Article
Abstract	The use of photocatalytic technology in VOCs pollutants removal has caused great attention. Fe2O3 possesses some unique advantages among diverse visible-light driven photocatalysts due to its narrow bandgap, abundant reserves and favorable biosafety. In this work, Fe2O3/TiO2 composites was fabricated by a facile impregnation method and their photocatalytic performance towards acetaldehyde and o-xylene was detected. TEM, EDS, photoluminescence spectra and UV-Vis were used to characterize the morphology and properties of the Fe2O3/TiO2 composites. It was proved that the photocatalytic ability of TiO2 was greatly improved by coupling with Fe2O3. Interestingly, the Fe2O3/TiO2 composites showed deactivation in the degradation of acetaldehyde while no such phenomenon in the o-xylene case. The reason could be that Fe3+ accepted the photo-induced electrons of TiO2 and was reduced to Fe2+, which can easily combine with the intermediate product of acetaldehyde and generated Fe(CH3COO)(2). Moreover, the deactivated photocatalyst can be regenerated by heat treatment, since Fe(CH3COO)(2) can be decomposed into Fe2O3 in air. ESR was further used to demonstrate this mechanism. This work reveals the coupled redox reactions in the photocatalytic process, which is benefit for the design of new photocatalysts.
Keyword	Photocatalysis Redox behavior Fe2O3/TiO2 VOCs removal Regeneration
DOI	10.1016/j.ceramint.2019.03.255
Language	英语
WOS Research Area	Materials Science
Publisher	ELSEVIER SCI LTD
Citation statistics
Document Type	期刊论文
Identifier	http://ir.sic.ac.cn/handle/331005/27020
Collection	中国科学院上海硅酸盐研究所
Recommended Citation GB/T 7714	Dai, Xueping,Lu, Guanhong,Hu, Yidan,et al. Reversible redox behavior of Fe2O3/TiO2 composites in the gaseous photodegradation process[J]. CERAMICS INTERNATIONAL,2019,45(10):13187.
APA	Dai, Xueping,Lu, Guanhong,Hu, Yidan,Xie, Xiaofeng,Wang, Xiao,&Sun, Jing.(2019).Reversible redox behavior of Fe2O3/TiO2 composites in the gaseous photodegradation process.CERAMICS INTERNATIONAL,45(10),13187.
MLA	Dai, Xueping,et al."Reversible redox behavior of Fe2O3/TiO2 composites in the gaseous photodegradation process".CERAMICS INTERNATIONAL 45.10(2019):13187.

Files in This Item:
There are no files associated with this item.

If you have any objections to this item, please fill out the form below and the administrator will contact you as soon as possible.
Content:
Email：	*
Institution:
Verification Code:	Refresh

Any comments and suggestions are welcomed.
Title:	*
Content:
Email：	*
Verification Code:	Refresh

中国科学院上海硅酸盐研究所机构知识库