DOI: 10.1016/j.scib.2019.10.020
论文题名: Polyaniline-TiO2 composite photocatalysts for light-driven hexavalent chromium ions reduction
作者: Deng X. ; Chen Y. ; Wen J. ; Xu Y. ; Zhu J. ; Bian Z.
刊名: Science Bulletin
ISSN: 20959273
出版年: 2020
卷: 65, 期: 2 起始页码: 105
结束页码: 112
语种: 英语
中文关键词: 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
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 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/169876
Appears in Collections: 气候变化与战略
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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
Recommended Citation:
Deng X.,Chen Y.,Wen J.,et al. Polyaniline-TiO2 composite photocatalysts for light-driven hexavalent chromium ions reduction[J]. Science Bulletin,2020-01-01,65(2)