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Enhanced Visible-Light-Driven Photocatalytic Activity of ZnAl Layered Double Hydroxide by Incorporation of Co2+

School of Chemical Engineering, Shenyang University of Chemical Technology, China

Received: 3 Feb 2018; Revised: 8 Jul 2018; Accepted: 13 Jul 2018; Published: 4 Dec 2018; Available online: 14 Nov 2018.
Open Access Copyright (c) 2018 by Authors, Published by BCREC Group under http://creativecommons.org/licenses/by-sa/4.0.

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Abstract

Co-doped ZnAl layered double hydroxides (LDH) were papered by coprecipitation. The prepared samples were characterized by multiple techniques including X-ray Diffraction (XRD), Brunauer−Emmett−Teller (BET) surface area, Scanning Electronic Microscopy (SEM), Transmission Electron Microscopy (TEM), X-ray Photoelectron Spectroscopy (XPS) and UV−Vis Diffuse-Reflectance Spectroscopy (UV−Vis DRS). The incorporation of Co2+ into the ZnAl LDH sheets as CrO6 octahedron forms a new  energy level which contributes for the excitation of electrons under visible light. The doped Co2+ at a reasonable content also serves as photo-generated charges separator and improves the visible light photocatalytic activity of ZnAl LDH. A degradation mechanism based on the hydroxyl radical as the active species was proposed. 

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Keywords: Layered Double Hydroxides; Cobalt-doping; RhB Degradation; Visible Light
Funding: Research Fund for the Scientific Project of Liaoning Science and Technology Department (No. 201602589)

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Language : EN
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Last update: 2021-10-15 11:35:58

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Last update: 2021-10-15 11:35:58

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