Eco-Toxicological and Kinetic Evaluation of TiO2 and ZnO Nanophotocatalysts in Degradation of Organic Dye
- Title
- Eco-Toxicological and Kinetic Evaluation of TiO2 and ZnO Nanophotocatalysts in Degradation of Organic Dye
- Author
- 김기현
- Keywords
- azo food dye; eco-toxicity; Langmuir-Hinshelwood kinetics; photocatalysis; photocorrosion; nanoparticles
- Issue Date
- 2019-10
- Publisher
- Multidisciplinary Digital Publishing Institute (MDPI)
- Citation
- Catalysts, v. 9, no. 10, article no. 871
- Abstract
- In this study, the photocatalytic degradation of azo dye "Food Black 1" (FB1) was investigated using TiO2 and ZnO nanoparticles under ultraviolet (UV) light. The performances of the two photocatalysts were evaluated in terms of key parameters (e.g., decolorization, dearomatization, mineralization, and detoxification of dye) in relation to variables including pre-adsorption period, pH, and temperature. Under acidic conditions (pH 5), the ZnO catalyst underwent photocorrosion to increase the concentration of zinc ions in the system, thereby increasing the toxic properties of the treated effluent. In contrast, TiO2 efficiently catalyzed the degradation of the dye at pH 5 following the Langmuir-Hinshelwood (L-H) kinetic model. The overall results of this study indicate that the decolorization rate of TiO2 on the target dye was far superior to ZnO (i.e., by 1.5 times) at optimum catalyst loading under UV light.
- URI
- https://www.mdpi.com/2073-4344/9/10/871https://repository.hanyang.ac.kr/handle/20.500.11754/154351
- ISSN
- 2073-4344
- DOI
- 10.3390/catal9100871
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > CIVIL AND ENVIRONMENTAL ENGINEERING(건설환경공학과) > Articles
- Files in This Item:
- Eco-Toxicological and Kinetic Evaluation of TiO2 and ZnO Nanophotocatalysts in Degradation of Organic Dye.pdfDownload
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