Anodization of bismuth doped TiO2 nanotubes composite for photocatalytic degradation of phenol in visible light
- Title
- Anodization of bismuth doped TiO2 nanotubes composite for photocatalytic degradation of phenol in visible light
- Author
- 김종오
- Keywords
- Anodization; Bismuth doping; TiO2 nanotubes; Organic pollutant; Phenol; Photocatalytic degradation
- Issue Date
- 2017-03
- Publisher
- ELSEVIER SCIENCE BV
- Citation
- CATALYSIS TODAY, v. 282, pt. 1, page. 31-37
- Abstract
- Bismuth doped TiO2 photocatalyst was synthesized in a one-step electrochemical anodization method. Bismuth nitrate Bi(NO3)(3) was used as a bismuth source. The obtained samples were characterized by FE-SEM, XRD, EDX and XPS. The optimum synthesis conditions for bismuth doping were 1.0 M bismuth nitrate in an ethylene glycol electrolyte with anodization at 40 V for 2 h. Compared with undoped TiO2 nanotubes, bismuth doped TiO2 photocatalyst showed a higher photocatalytic activity by a factor of 4.0 for phenol degradation under visible light irradiation. The optimum phenol degradation using a photo-electrocatalytic method was observed at a 0.5 V external bias, and this degradation rate was 5.2 times faster than that observed for undoped TiO2 nanotubes. The doped bismuth TiO2 nanotubes are favorable for the separation of photo-induced electrons and holes, reducing the recombination of charges, and promoting the formation of hydroxyl radicals and superoxides that degrade phenol. (C) 2016 Elsevier B.V. All rights reserved.
- URI
- https://www.sciencedirect.com/science/article/pii/S0920586116301985?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/113285
- ISSN
- 0920-5861; 1873-4308
- DOI
- 10.1016/j.cattod.2016.03.029
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > CIVIL AND ENVIRONMENTAL ENGINEERING(건설환경공학과) > Articles
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