Efficient photocatalytic disinfection of Escherichia coli by N-doped TiO2 coated on coal fly ash cenospheres
文献类型：期刊论文
| 作者 | Liu, Wenxiu; Yan, Yichang; Lan, Juanru; Zhou, Xiaoqin; Li, Zifu; Zheng, Tianlong; Cao, Wenbin; Zhu, Nan |
| 刊名 | JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
 |
| 出版日期 | 2018-12-01 |
| 卷号 | 367页码:355-364 |
| 关键词 | Coal fly ash cenospheres N-doped TiO2 Photocatalytic disinfection Mechanism |
| ISSN号 | 1010-6030 |
| 文献子类 | Article |
| 英文摘要 | In this study, N-doped TiO2 (TiON) coated coal fly ash cenospheres (CFACs) was synthesized for photocatalytic disinfection against Escherichia coli (E. coli). Based on the physi-chemical evaluation of the TiON coated CFACs (TiON-CFACs), the disinfection efficiencies of E. coli under three different light sources, namely, ultraviolet A (UVA), visible light (VL), and the light emitting diodes with a wavelength of 420 nm (LED-420), were investigated. Then, a three-factor, four-level orthogonal experiment was designed to evaluate the influences of dosage, pH, and light intensity on its disinfection efficiency. The TiON-CFACs were effective under UVA, LED-420, and VL irradiation, with disinfection efficiencies of 5.78 log (45 min UVA), 5.84 log (180 min LED-420) and 5.97 log (300 min VL), respectively. The optimal disinfection efficiency was achieved at an initial pH of 6 under LED-420 irradiation at 40 mW/cm(2) with a dosage of 4 g/L TiON-CFACs. The mechanism of disinfection was further investigated using a range of free radical scavengers. Findings indicated that H2O2 appeared to play an indispensable role in E. coli disinfection. Moreover, the TiON-CFACs showed a stable disinfection efficiency of 5 log, even when the substance was recycled for four times, indicating the reliability and stability of the material. The results showed that the TiON-CFACs are promising in water treatment for photocatalytic disinfection of E. coli. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/41135]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Liu, Wenxiu,Yan, Yichang,Lan, Juanru,et al. Efficient photocatalytic disinfection of Escherichia coli by N-doped TiO2 coated on coal fly ash cenospheres[J]. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY,2018,367:355-364. |
| APA | Liu, Wenxiu.,Yan, Yichang.,Lan, Juanru.,Zhou, Xiaoqin.,Li, Zifu.,...&Zhu, Nan.(2018).Efficient photocatalytic disinfection of Escherichia coli by N-doped TiO2 coated on coal fly ash cenospheres.JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY,367,355-364. |
| MLA | Liu, Wenxiu,et al."Efficient photocatalytic disinfection of Escherichia coli by N-doped TiO2 coated on coal fly ash cenospheres".JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY 367(2018):355-364. |
入库方式： OAI收割
来源：生态环境研究中心
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