Electrochemical synthesis of co-doped RGO-Bi-TiO2 nanotube composite: Enhanced activity under visible light
- Authors
- Kim, Seu-Run; Ali, Imran; Kim, Jong-Oh
- Issue Date
- Oct-2017
- Publisher
- Korean Society of Industrial Engineering Chemistr(ELSEVIER SCIENCE INC)
- Keywords
- Photocatalyst; RGO-Bi-TNTs; Anodization; Visible light; Organic degradation
- Citation
- JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY, v.54, pp.316 - 323
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
- Volume
- 54
- Start Page
- 316
- End Page
- 323
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/4045
- DOI
- 10.1016/j.jiec.2017.06.006
- ISSN
- 1226-086X
- 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.
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