Electrochromic titania nanotube arrays for the enhanced photocatalytic degradation of phenol and pharmaceutical compounds
SCIE
SCOPUS
- Title
- Electrochromic titania nanotube arrays for the enhanced photocatalytic degradation of phenol and pharmaceutical compounds
- Authors
- Qing Zheng; Hye-Jin Lee; Jaesang Lee; Choi, W; Noh-Back Park; Changha Lee
- Date Issued
- 2014-08-01
- Publisher
- ELSEVIER SCIENCE BV
- Abstract
- Vertically aligned, electrochromic-coloured, amorphous titania nanotube arrays (TNAs) were fabricated using a facile room-temperature, solution-based electrochemical cathodisation method. Rapid cathodisation within 30s converted pristine TNAs into their dark analogues. Compared to their untreated counterparts, the cathodised dark TNAs exhibited significantly enhanced optical absorbance, covering the full spectrum of visible light. Further annealing of the electrochromic coloured amorphous TNAs in a N-2 atmosphere induced their transformation into dark crystalline TNAs, which directly harnessed simulated sunlight for the photocatalytic degradation of organic contaminants, including phenol, ibuprofen, carbamazepine and caffeine. Compared to the pristine crystalline TNAs (annealed in air), the dark crystalline TNAs showed higher optical absorbance, larger charge carrier density, lower electron transport resistance, and an enhancement of 107-131% in degradation kinetics for the target organic contaminants. (C) 2014 Elsevier B.V. All rights reserved.
- Keywords
- Cathodisation; Titania nanotube arrays; Electrochromism; Photocatalysis; Phenol; Pharmaceutical compounds; TIO2 THIN-FILMS; SENSITIZED SOLAR-CELLS; ION BATTERIES; WATER; ANODIZATION; ELECTROLYTES; EFFICIENCIES; PERFORMANCE; FABRICATION; ELECTRODES
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/14482
- DOI
- 10.1016/J.CEJ.2014.03.111
- ISSN
- 1385-8947
- Article Type
- Article
- Citation
- CHEMICAL ENGINEERING JOURNAL, vol. 249, page. 285 - 292, 2014-08-01
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