Quantitative Comparison of the Photocatalytic Efficiency of TiO2 Nanotube Film and TiO2 Powder
- Title
- Quantitative Comparison of the Photocatalytic Efficiency of TiO2 Nanotube Film and TiO2 Powder
- Other Titles
- 지하수토양환경, Journal of soil and groundwater environment, v.21, no.2, page.8-14
- Author
- 박재우
- Keywords
- TiO2 nanotubes; Electrostatic anodization; Humic acid; Adsorption effect; Terephthalic acid
- Issue Date
- 2016-05
- Publisher
- 한국지하수토양환경학회
- Citation
- 지하수토양환경, v. 21, NO 2, Page. 8-14
- Abstract
- We compared the plausible reaction mechanism and quantitative efficiency of highly self-organized TiO2 nanotube (ntTiO2) film with TiO2 powder. Film was fabricated by electrochemical potentiostatic anodization of titanium thin film in an ethylene-glycol electrolyte solution containing 0.3 wt% NH4F and 2 vol% deionized water. Nanotubes with a pore size of 80-100 nm were formed by anodization at 60 V for 3 h. Humic acid (HA) was degraded through photocatalytic degradation using the ntTiO2 film. Pseudo first-order rate constants for 0.3 g of ntTiO2, 0.3 g TiO2 powder, and 1 g TiO2 powder were 0.081 min−1, 0.003 min−1, and 0.044 min−1, respectively. HA adsorption on the ntTiO2 film was minimal while adsorption on the TiO2 powder was about 20% based on thermogravimetric analysis. Approximately five-fold more normalized OH radicals were generated by the ntTiO2 film than the TiO2 powder. These quantitative findings explain why ntTiO2 film showed superior photocatalytic performance to TiO2 powder.
- URI
- http://koreascience.or.kr/article/ArticleFullRecord.jsp?cn=JGSTB5_2016_v21n2_8https://repository.hanyang.ac.kr/handle/20.500.11754/71532
- ISSN
- 1598-6438; 2287-8831
- DOI
- 10.7857/JSGE.2016.21.2.008
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > CIVIL AND ENVIRONMENTAL ENGINEERING(건설환경공학과) > Articles
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