Degradation of ofloxacin by UVA-LED/TiO2 nanotube arrays photocatalytic fuel cells

被引：21
作者：
Xia, Bin [1 ]
Yao, Juan-juan [1 ]
Han, Chen-xi [1 ]
Zhang, Zhi [1 ]
Chen, Xiang-yu [1 ]
Fang, Yan-juan [1 ]
机构：
[1] Chongqing Univ, Key Lab Three Gorges Reservoir Reg Ecoenvironm, Minist Educ, Shabei St 83, Chongqing 400045, Peoples R China
来源：
CHEMICAL PAPERS | 2018年 / 72卷 / 02期
基金：
中国国家自然科学基金;
关键词：
TiO2 nanotube arrays; Photoanode; Photocatalysis; Ofloxacin; Reactive species; Degradation pathways; Recyclability; WASTE-WATER TREATMENT; TIO2; PHOTOCATALYSIS; PHARMACEUTICAL COMPOUNDS; OXIDE NANOPARTICLES; MECHANISMS; KINETICS; ANATASE; OXIDATION; ALCOHOLS; ENERGY;
D O I：
10.1007/s11696-017-0285-6
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The degradation of ofloxacin (OFX) at low concentration in aqueous solution by UVA-LED/TiO2 nanotube arrays photocatalytic fuel cells (UVA-LED/TiO2 NTs PFCs) was investigated. TiO2 nanotube arrays (TiO2 NTs) photoanode prepared by anodization-constituted anatase-rutile bicrystalline framework. The results indicated that the degradation efficiency of OFX by UVA-LED/TiO2 NTs PFC was significantly enhanced by 14.3% compared with UVA-LED/TiO2 NTs photocatalysis. The pH affected the degradation efficiency markedly; the highest degradation efficiency (95.0%) and the pseudo-first-order reaction rate constant k value (0.049 min(-1)) were achieved in neutral condition (pH 7.0). The degradation efficiency increased with the increasing concentration of dissolved oxygen (DO) in the UVA-LED/TiO2 NTs PFC. The main reactive species of OFX degradation are positive holes (h(+)) and superoxide ion radicals (O-2(center dot-)) in a DO sufficient condition. Furthermore, the possible pathways of OFX degradation were proposed.
引用
收藏
页码：359 / 368
页数：10
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