气候变化领域集成服务门户(CCPortal): Polyaniline-TiO2 composite photocatalysts for light-driven hexavalent chromium ions reduction

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DOI	10.1016/j.scib.2019.10.020
	Polyaniline-TiO2 composite photocatalysts for light-driven hexavalent chromium ions reduction
	Deng X.; Chen Y.; Wen J.; Xu Y.; Zhu J.; Bian Z.
发表日期	2020
ISSN	20959273
起始页码	105
结束页码	112
卷号	65 期号:2
英文摘要	In order to develop efficient photocatalysts, great efforts have been made to reduce hexavalent chromium to trivalent chromium. The photocatalytic efficiency of this reduction depends largely on the adsorption and diffusion of hexavalent chromium ions on the surface of the photocatalyst. In this paper, polyaniline-TiO2 composite can effectively improve the photocatalytic reduction performance and stability of hexavalent chromium ion. The effect of polyaniline (PANI) thickness on Cr(VI) activity and stability of photocatalytic reduction was studied by adjusting the content of PANI on Mesoporous TiO2 (MT) surface. Under the irradiation conditions, the reaction results showed that the reduction rate was 100%, and the maximum reaction rate reached 0.62 min−1 when the PANI modification was 3.0%. Moreover, the results showed that the reduction performance remained 100% after ten cycles. The main reason is that the PANI modified on the surface of TiO2 is rich in positively charged amino group, which can efficiently adsorb the reactant Cr(VI), and make the product Cr(III) leave the reaction interface quickly, thus ensuring the performance of photocatalyst. © 2019 Science China Press
关键词	Hexavalent chromium Photo-reduction Polyaniline Titanium dioxide Trivalent chromium
英文关键词	Metal ions; Photocatalytic activity; Polyaniline; Titanium dioxide; Composite photocatalysts; Hexavalent chromium; Hexavalent chromium ions; Irradiation conditions; Photo reduction; Photocatalytic efficiency; Photocatalytic reduction; Trivalent chromium; Chromium compounds
语种	英语
来源期刊	Science Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207020
作者单位	The Education Ministry Key Laboratory of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials, Shanghai Normal University, Shanghai, 200234, China
推荐引用方式 GB/T 7714	Deng X.,Chen Y.,Wen J.,et al. Polyaniline-TiO2 composite photocatalysts for light-driven hexavalent chromium ions reduction[J],2020,65(2).
APA	Deng X.,Chen Y.,Wen J.,Xu Y.,Zhu J.,&Bian Z..(2020).Polyaniline-TiO2 composite photocatalysts for light-driven hexavalent chromium ions reduction.Science Bulletin,65(2).
MLA	Deng X.,et al."Polyaniline-TiO2 composite photocatalysts for light-driven hexavalent chromium ions reduction".Science Bulletin 65.2(2020).