Efficient photodegradation of dye pollutants using a novel plasmonic AgCl microrods array and photo--optimized surface-enhanced Raman scattering

被引：33

作者：

Cheng, Yi-Feng ^{[1
]}

Cao, Qi ^{[2
]}

Zhang, Jie ^{[1
]}

Wu, Tong ^{[3
]}

Che, Renchao ^{[1
]}

机构：

[1] Fudan Univ, Lab Adv Mat, Dept Mat Sci, Collaborat Innovat Ctr Chem Energy Mat, 2205 Songhu Rd, Shanghai 200438, Peoples R China

[2] Univ Tokyo, Sch Engn, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1138656, Japan

[3] Dow Chem China Investment Co Ltd, 936 Zhangheng Rd,Zhangjiang Hitech Pk, Shanghai 201303, Peoples R China

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2017年 / 217卷

基金：

美国国家科学基金会;

关键词：

AgCl crystal; Ag particles; Semiconductor; Photocatalysis; SERS; ENERGY-CONVERSION; PHOTOCATALYTIC ACTIVITY; FACILE FABRICATION; CHARGE SEPARATION; AZO DYES; SEMICONDUCTOR; NANOPARTICLES; PERFORMANCE; DEGRADATION; NANOMATERIALS;

D O I：

10.1016/j.apcatb.2017.05.021

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A novel arrayed AgCl micro-rods have in situ grown on an Ag foil successfully for the first time. The preparation process is consisted of two facile steps: (1) immersed oxidation and (2) directional ions exchange. The structure of the as-synthesized arrayed substrate has been characterized comprehensively, and the relevant growth mechanism is proposed. This highly aligned AgCl arrays show a remarkable visible-light-driven photocatalytic activity towards degrading 10(-5) mol/L rhodamine 6G (R6G) aqueous solution. The ultra-stable catalytic performance of the plasmonic arrays was revealed by the recycled tests in the neutral and acidic conditions. Moreover, a facile SERS substrate based on the AgCl arrays was obtained with the optimal enhancement factor (EF) of similar to 3.25 x 10(7), by directly putting the substrate under a Xe lamp in 7.5 min. Amazingly, the photo-optimized surface-enhanced Raman scattering (SERS) substrate still shows a stable activity for photodegrading R6G. The photocatalytic and SERS mechanism are proposed in this study. (C) 2017 Published by Elsevier B.V.

引用

页码：37 / 47

页数：11

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