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Electrochemical synthesis of co-doped RGO-Bi-TiO2 nanotube composite: Enhanced activity under visible light

Title
Electrochemical synthesis of co-doped RGO-Bi-TiO2 nanotube composite: Enhanced activity under visible light
Author
김종오
Keywords
Photocatalyst; RGO-Bi-TNTs; Anodization; Visible light; Organic degradation
Issue Date
2017-06
Publisher
ELSEVIER SCIENCE INC
Citation
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY, v. 54, page. 316-323
Abstract
TiO2 nanotube (TNT) photocatalyst with enhanced visible-light activity was synthesized by co-doping with reduced graphene oxide (RGO) and bismuth (Bi). The RGO-Bi-TNTs composite was fabricated using three different approaches: one-step, two-step, and three-step electrochemical anodization. The synthesized catalyst was characterized by FE-SEM, XRD, AES, and PL. Co-doping optimum synthesis using three-step method accomplished 1.5 and 3.8-times higher photocatalytic activity than single-doping and undoped-TNTs, respectively under same conditions. RGO and Bi were favorable for separation of e(-) and h(+), which reduced recombination of charges. This result promoted the formation of OH radicals and increased photocatalytic efficiency of TNTs under visible light. (C) 2017 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
URI
https://www.sciencedirect.com/science/article/pii/S1226086X17302836?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/114424
ISSN
1226-086X; 1876-794X
DOI
10.1016/j.jiec.2017.06.006
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > CIVIL AND ENVIRONMENTAL ENGINEERING(건설환경공학과) > Articles
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