Journal
CHINESE CHEMICAL LETTERS
Volume 31, Issue 10, Pages 2661-2667Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.cclet.2020.03.068
Keywords
Photoelectrocatalytic system; r-TNAs photoanode; AC/PTFE cathode; Carbamazepine degradation pathway
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Funding
- National Natural Science Foundation of China [51508254, 51978319]
- Fundamental Research Funds for the Central Universities [lzujbky-2017-it98]
- National College Student Innovation and Entrepreneurship Training Program of Lanzhou University
- Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lake, Chinese Academy of Sciences
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This study aimed to construct a photoelectrocatalytic (PEC) reaction system based on the self-made reduced TiO2 NTAs (r-TNAs) photoanode and activated carbon/Polytetrafluoroethylene (AC/PTFE) cathode. It would be observed clearly that the degradation rate constant of carbamazepine (CBZ) over r-TNAs(photoanode)-AC/PTFE(cathode) PEC system (0.04961 min(-1)) was even higher than that of r-TNAs(photoanode)-Pt-(cathode) PEC system (0.04602 min(-1)) with the assistance of visible light irradiation and +0.4 V external potential. Besides, in order to obtain optimized conditions, the influence of key parameters such as pH value, electric current density and electrolyte concentration were studied. Most importantly, photoelectrochemical (PECH) properties, reactive oxide species contribution, (OH)-O-center dot formation rate and CBZ degradation pathway were determined. The results illustrated that the excellent PEC degradation performance depended on the excellent photocatalytic property of r-TNAs photoanode and electron transfer property of photoelectrodes in r-TNAs(photoanode)-AC/PTFE(cathode) PEC system. Therefore, the study demonstrated that the r-TNAs(photoanode)-AC/PTFE(cathode) PEC system could be expected to replace metal-catalyzed cathodes depending on its excellent PEC performance activity and low cost as well as the reaction system possessed objective and practical application prospect. (C) 2020 Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. Published by Elsevier B.V. All rights reserved.
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