Reusability and photocatalytic activity of bismuth-TiO2 nanocomposites for industrial wastewater treatment
- Title
- Reusability and photocatalytic activity of bismuth-TiO2 nanocomposites for industrial wastewater treatment
- Author
- 김종오
- Keywords
- Two- and one-step methods; Bi-TiO2 composite; Recycling; Visible-light; Pollutant degradation
- Issue Date
- 2019-03
- Publisher
- ACADEMIC PRESS INC ELSEVIER SCIENCE
- Citation
- ENVIRONMENTAL RESEARCH, v. 170, Page. 222-229
- Abstract
- In this study, bismuth-TiO2 nanotube (Bi-TNT) composites were used for the treatment of industrial wastewater. Bi-TNT were synthesized using two- and one-step anodization methods. The obtained composites were analyzed using X-ray diffraction, field emission scanning electron microscopy, UV-visible diffuse reflectance spectroscopy, Energy dispersive X-ray spectroscopy and X-ray photoelectron spectroscopy. For the two-step Bi-TNT composites, we investigated the effect of different Bi deposition times, Bi concentrations, and Bi deposition voltages on photodegradation efficiency. For the one-step Bi-TNT composites, we investigated the effect of different anodization voltages, anodization times, and Bi concentrations. Initially, the optimal synthesis conditions for two- and one-step Bi-TNT catalysts were identified and then these optimized conditions were used for industrial wastewater treatment that was collected from Banwol Sihwa Industrial Complex Republic of Korea. The Bi-TNT two- and one-step composites showed 2.0 and 2.5 times higher photocatalytic activity, respectively, for industrial wastewater treatment than that of TNT in visible-light. Recycling of Bi-TNT composites showed that the one-step composite method was more efficient and stable than the two-step method because Bi coupling and nanotube formation simultaneously occurred.
- URI
- https://www.sciencedirect.com/science/article/pii/S0013935118306674?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/110439
- ISSN
- 0013-9351; 1096-0953
- DOI
- 10.1016/j.envres.2018.12.038
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > CIVIL AND ENVIRONMENTAL ENGINEERING(건설환경공학과) > Articles
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