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Journal of Materials Science
Erschienen in: Journal of Materials Science 15/2018

03.05.2018 | Electronic materials

Controlled fabrication of TiO2/C3N4 core–shell nanowire arrays: a visible-light-responsive and environmental-friendly electrode for photoelectrocatalytic degradation of bisphenol A

verfasst von: Yajun Wang, Qiaohuan Wu, Yan Li, Liming Liu, Zhouliang Geng, Yuming Li, Juan Chen, Weikun Bai, Guiyuan Jiang, Zhen Zhao

Erschienen in: Journal of Materials Science | Ausgabe 15/2018

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Abstract

Photoelectrocatalytic (PEC) oxidation is a promising method in water treatment due to the synergistic effect of photocatalytic (PC) oxidation and electro-oxidation. Up to now, developing visible-light-responsive, efficient and environmental-friendly electrode for PEC degradation application is still a challenge. In this work, novel and environmental-friendly TiO2/C3N4 core–shell nanowire arrays as an electrode were investigated for PEC degradation of bisphenol A (BPA). TiO2 nanowire arrays provide a direct electron pathway, g-C3N4 serves as a stable and environmental-friendly visible light sensitizer, and effective charge spatial separation can be achieved across the well-matched core–shell interface. Compared with TiO2 nanowire arrays, TiO2/C3N4 core–shell nanowire arrays exhibit higher PC and PEC performance. The photocurrent response of the TiO2 nanowire arrays is enhanced about two times after C3N4 shell deposition. And the PEC performance of TiO2/C3N4 core–shell nanowire arrays is significantly enhanced, which is one time higher than that of TiO2 (under 1.0 V external potential). The enhancement of PEC performance of TiO2 nanowire arrays after C3N4 modification can be attributed to the synergistic photoelectric effect, well-matched interface and efficient charge separation induced by the type-II TiO2/C3N4 band alignment. Moreover, the intermediate products of BPA degradation by PEC oxidation were analyzed by gas chromatography–mass spectrometry and five specific products were identified, and then two possible pathways for BPA degradation by PEC process were proposed.
Vorheriger Artikel Three-dimensional phase field simulation of intragranular void formation and thermal conductivity in irradiated α-Fe
Nächster Artikel Enhancements in mechanical and electrical properties of carbon nanotube films by SiC and C matrix bridging

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Metadaten
Titel
Controlled fabrication of TiO2/C3N4 core–shell nanowire arrays: a visible-light-responsive and environmental-friendly electrode for photoelectrocatalytic degradation of bisphenol A
verfasst von
Yajun Wang
Qiaohuan Wu
Yan Li
Liming Liu
Zhouliang Geng
Yuming Li
Juan Chen
Weikun Bai
Guiyuan Jiang
Zhen Zhao
Publikationsdatum
03.05.2018
Verlag
Springer US
Erschienen in
Journal of Materials Science / Ausgabe 15/2018
Print ISSN: 0022-2461
Elektronische ISSN: 1573-4803
DOI
https://doi.org/10.1007/s10853-018-2368-3

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