Synergistic Adsorption Photocatalytic Degradation Effect and Norfloxacin Mechanism of ZnO/ZnS@BC Under UV-light Irradiation
Files
Academic Unit
College of Arts and Sciences
Publication Date
2020
Document Type
Article
Abstract
Norfloxacin (NOF) is an environmentally harmful and ubiquitous aquatic pollutant with extensive production and application. In this study, a novel composition named carbon-based composite photocatalytic material of zinc oxide and zinc sulphide (ZnO/ZnS@BC) was successfully obtained by the impregnation-roasting method to remove NOF under UV-light. Scanning electron microscopy, X-ray photoelectron spectroscopy, transmission electron microscopy and energy dispersive spectrometer characterised the composition. ZnO/ZnS was successfully decorated on the surface of biochar (BC). The pH, the ZnSO4/PS ratio, and ions and quenchers, were investigated. High removal efficiency was obtained with a pH of 7 and a ZnSO4/PS ratio of 1:1, and the removal ratio of NOF reached 95% within three hours; the adsorption and degradation ratios reached 46% and 49%, respectively. Fe2+ promoted the degradation of NOF, whereas other ions inhibited it, with NO3− showing the strongest inhibitory effect. Three reactive species (tert-butanol, quinone, and ammonium oxala) were identified in the catalytic system. The decreasing order of the contribution of each reactive species was: O2− > ·OH− > h+. Additionally, a recycling experiment demonstrated the stability of the catalyst; the catalytic degradation ratio of NOF reached 78% after five successive runs. Therefore, ZnO/ZnS@BC possessed strong adsorption capacity and high ultraviolet photocatalysis ability.
Journal Title
Scientic Reports: natureresearch
Volume
10
Issue
1
DOI
https://doi.org/10.1038/s41598-020-68517-x
Recommended Citation
Liu, Wen; He, Tianpei; Wang, Yonghong; Ning, Ge; Xu, Zhenggang; Chen, Xiaoyong; Hu, Xinjiang; Wu, Yaohui; and Zhao, Yunlin, "Synergistic Adsorption Photocatalytic Degradation Effect and Norfloxacin Mechanism of ZnO/ZnS@BC Under UV-light Irradiation" (2020). Faculty Authors and Creators Reception. 232.
https://opus.govst.edu/fac/232