Issue 59, 2015
From the journal:

RSC Advances

Fabrication and characterization of high efficiency and stable Ag3PO4/TiO2 nanowire array heterostructure photoelectrodes for the degradation of methyl orange under visible light irradiation

Bei Jin,ac   Xiaosong Zhou,*a   Jin Luo,a   Xuyao Xu,a   Lin Ma,a   Dongyan Huang,a   Zilun Shaoa  and  Zhihui Luo*b  

* Corresponding authors

a School of Chemistry and Chemical Engineering, Institute of Physical Chemistry, Development Center for New Materials Engineering & Technology in Universities of Guangdong, Lingnan Normal University, Zhanjiang 524048, China
E-mail: zxs801213@163.com
Fax: +86-759-3183205
Tel: +86-759-3183205

b Guangxi Key Laboratory of Agricultural Products Processing (Cultivation Base), Guangxi Colleges and Universities Key Laboratory for Efficient Use of Agricultural Resources in the Southeast of Guangxi, College of Chemistry and Material, Yulin Normal University, Yulin, Guangxi 537000, China
E-mail: Lzhui_1980@163.com

c Engineering Research Center of Starch and Vegetable Protein Processing, Ministry of Education, South China University of Technology, Guangzhou 510640, China

Abstract

Ag3PO4/TiO2 nanowire array (ATNWs) heterostructure photoelectrodes were prepared by a sequential chemical bath deposition. The structure and optical properties of the ATNWs were characterized by scanning electron microscopy, high-resolution transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, UV-Vis diffuse reflectance spectroscopy, photoluminescence spectroscopy and electrochemical techniques. The photocatalytic activity of the ATNWs was evaluated by photocatalytic degradation of methyl orange (MO) under visible light irradiation (λ > 400 nm). The results showed that Ag3PO4 nanoparticles were successfully formed on the surface of the TiO2 nanowires (NWs) causing no damage to the ordered structure of the nanowires. The p-type Ag3PO4 nanoparticles deposited on the n-type TiO2 NWs could promote the transfer of photo-generated holes, which inhibited the recombination of electrons and holes effectively, leading to a significant increase in the lifetime of the charge carriers. Moreover, the ATNWs show much higher photocatalytic activity and stability than that of the pure TiO2 NWs for the photocatalytic degradation of MO. The enhanced photocatalytic activity could be attributed to the visible-light photocatalytic activity of Ag3PO4 and the heterostructure between Ag3PO4 and TiO2.

Graphical abstract: Fabrication and characterization of high efficiency and stable Ag3PO4/TiO2 nanowire array heterostructure photoelectrodes for the degradation of methyl orange under visible light irradiation

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Article information

DOI
https://doi.org/10.1039/C5RA06477E
Article type
Paper
Submitted
11 Apr 2015
Accepted
22 May 2015
First published
02 Jun 2015

RSC Adv., 2015,5, 48118-48123

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Fabrication and characterization of high efficiency and stable Ag3PO4/TiO2 nanowire array heterostructure photoelectrodes for the degradation of methyl orange under visible light irradiation

B. Jin, X. Zhou, J. Luo, X. Xu, L. Ma, D. Huang, Z. Shao and Z. Luo, RSC Adv., 2015, 5, 48118 DOI: 10.1039/C5RA06477E

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