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

Title
One-step electrochemical synthesis of graphene oxide-TiO2 nanotubes for improved visible light activity
Author
김종오
Keywords
PHOTOCATALYTIC DEGRADATION; OPTICAL-PROPERTIES; METHYLENE-BLUE; TIO2; PERFORMANCE; NANOCOMPOSITE; COMPOSITE; PHOTOELECTRODE; NANOPARTICLES; SUBSTRATE
Issue Date
2017-05
Publisher
OPTICAL SOC AMER
Citation
OPTICAL MATERIALS EXPRESS, v. 7, no. 5, page. 1535-1546
Abstract
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
URI
https://www.osapublishing.org/ome/abstract.cfm?uri=ome-7-5-1535https://repository.hanyang.ac.kr/handle/20.500.11754/114060
ISSN
2159-3930
DOI
10.1364/OME.7.001535
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > CIVIL AND ENVIRONMENTAL ENGINEERING(건설환경공학과) > Articles
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