논문 해외 국제전문학술지(SCI급) Photocatalytic degradation of trichloroethylene in aqueous phase using nano-ZNO/Laponite composites
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2013-12
- 저자명 Jin Chul Joo, Chang Hyuk Ahn, Dae Gyu Jang, Young Han Yoon, Jong Kyu Kim, Luiza Campos, Hosang Ahn
- 학술지명 Journal of hazardous materials
- 발행처명 Elsevier
- 발행국가 해외
- 논문언어 외국어
- 연구분야 공학 > 환경공학
- 원문 링크 https://doi.org/10.1016/j.jhazmat.2013.10.017
홈페이지논문 초록 (Abstract)
The feasibility of nano-ZnO/Laponite composites (NZLc) as a valid alternative to TiO2 to mineralize trichloroethylene (TCE) without difficulties for recovery of photocatalysts was evaluated. Based on the experimental observations, the removal of TCE using NZLc under UV irradiation was multiple reaction processes (i.e., sorption, photolysis, and photocatalysis). Sorption of TCE was thermodynamically favorable due to the hydrophobic partitioning into crosslinked poly vinyl alcohol, and the adsorption onto high-surface-area mineral surfaces of both ZnO and Laponite. The degradation efficiency of TCE can be significantly improved using NZLc under UV irradiation, indicating that ZnO-mediated heterogeneous photocatalytic degradation occurred. However, the degradation efficiency was found to vary with experimental conditions (e.g., initial concentration of TCE, loading amount of NZLc, the intensity of light and initial solution pH). Although the removal of TCE by NZLc was found to be a complex function of sorption, photolysis, and photocatalysis, the photocatalytic degradation of TCE on the surface of ZnO was critical. Consequently, developed NZLc can be applied as a valid alternative to suspended TiO2 powder, and overcome drawbacks (e.g., filtration and recovery of photocatalysts) in degradation of TCE for various water resources.