煅烧型锌铝水滑石光还原 Cr(Ⅵ)

doi:10.11896/j.issn.1005-023X.2018.14.004

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Abstract Mixed metal oxides ZnO/ZnAl₂O₄(ZnAl-MMO) with heterojunction structure were fabricated by thermal treatment of precursor of ZnAl-LDH at high temperature. All obtained samples were analysed by X ray diffraction (XRD), scanning elctron microscopy (SEM), transmission electron microscopy(TEM), specific surface specific aperture and UV-Vis diffuse reflectance. The function of pH solution, initial Cr(Ⅵ) concentration and the hole scavenger citric acid (CA) concentration on the photocatalytic performance were further discussed. An increase in the Cr (Ⅵ) photoreduced with decreasing pH values was noticed, suggesting that significance of pH values on phtoreduction. CA can adjust the pH of solution which improve the photocatalytic largely, furthermore, it can catch the holes effectively that leading to a better photocatalytic performance.

Key words： mixed metal oxide nanostructures chromium (Ⅵ) citric acid (CA) photoreduction

Published: 31 July 2018

CLC number:

TQ139.2

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	Articles by authors
	JING Qiuye
	PENG Dong
	YUAN Xiaoya

Cite this article:

JING Qiuye,PENG Dong,YUAN Xiaoya. Photocatalytic Reduction of Aqueous Cr(Ⅵ) by Calcined ZnAl-Layered Double Hydroxide[J]. Materials Reports, 2018, 32(14): 2345-2350.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2018.14.004 OR http://www.mater-rep.com/EN/Y2018/V32/I14/2345

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