One-step electrochemical synthesis of graphene oxide-TiO2 nanotubes for improved visible light activity

被引：11
作者：
Ali, Imran [1 ]
Kim, Seu-Run [1 ]
Park, Kyungmin [1 ]
Kim, Jong-Oh [1 ]
机构：
[1] Hanyang Univ, Dept Civil & Environm Engn, 222 Wangsimni Ro, Seoul 04763, South Korea
来源：
OPTICAL MATERIALS EXPRESS | 2017年 / 7卷 / 05期
基金：
新加坡国家研究基金会;
关键词：
PHOTOCATALYTIC DEGRADATION; OPTICAL-PROPERTIES; METHYLENE-BLUE; TIO2; PERFORMANCE; NANOCOMPOSITE; COMPOSITE; PHOTOELECTRODE; NANOPARTICLES; SUBSTRATE;
D O I：
10.1364/OME.7.001535
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Graphene oxide (GO)-TiO2 nanotubes (TNTs) were synthesized by one-step anodization. An as-prepared photocatalyst was characterized by FE-SEM, XRD, AES, PL, and UV-Vis DRS. To determine the effect of synthesis conditions on organics degradation, we prepared the catalyst with different GO concentrations, anodization voltages, and times. Optimum synthesis conditions were GO concentration 0.25 g L-1 and anodization at 48 V for 2 h. Compared with TNTs, GO-TNTs showed a 3.6-fold increase in photocatalytic efficiency under visible light. Recycling was performed to investigate the stability of a GO-TNT catalyst. GO-TNTs is favorable for the separation of charges (e(-)/h(+)), promotion of the formation of OH center dot, h(+), and superoxides, which degrade organics. (C) 2017 Optical Society of America
引用
收藏
页码：1535 / 1546
页数：12
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