Separable and recyclable meso-carbon@TiO2/carbon fiber composites for visible-light photocatalysis and photoelectrocatalysis

Chen, Hua-Jun and Yang, Yan-Ling and Hong, Min ORCID: https://orcid.org/0000-0002-6469-9194 and Chen, Jin-Geng and Suo, Guo-Quan and Hou, Xiao-Jiang and Feng, Lei and Chen, Zhi-Gang ORCID: https://orcid.org/0000-0002-9309-7993 (2019) Separable and recyclable meso-carbon@TiO2/carbon fiber composites for visible-light photocatalysis and photoelectrocatalysis. Sustainable Materials and Technologies, 21:e00105. pp. 1-11. ISSN 2214-9929


Abstract

Recycle and reuse of the nanosized photocatalysts is a common challenge in the catalyst field. To address this issue, we rationally load meso‑carbon@TiO 2 core-shell microspheres on carbon fiber felt to synthesize macro-sized meso‑carbon@TiO 2 /carbon fiber composites by an in-situ adsorption method. From the detailed microstructural and spectroscopic characterization, it has been found that the absorption edge of meso‑carbon@TiO 2 core-shell microspheres is extended to the visible light region, and the recombination of photon-excited electrons and holes can be significantly suppressed when compared with P25 TiO 2 powder. The experiment results of meso‑carbon@TiO 2 /carbon fiber composites indicates that the photocatalytic degradation rate under UV–vis light is much higher than that under visible light irradiation due to the higher charge carrier separation efficiency and the higher electron consumption of the direct Z-scheme. Moreover, the photocurrent density and the separation of photon-excited electrons from holes can be effectively promoted in the photoelectrocatalysis of meso‑carbon@TiO 2 /carbon fiber composites under visible light. The synergistic effect between electrocatalytic and photocatalytic oxidation under visible light results in almost complete degradation of Rhodamine B. Our study provides an avenue to recycle and reuse nanosized photocatalysts and open a possibility for practical industrial application of photocatalysis and photoelectrocatalysis using separable and recyclable meso‑carbon@TiO 2 /carbon fiber composites.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Date Deposited: 13 Jun 2022 23:28
Last Modified: 02 Aug 2022 23:45
Uncontrolled Keywords: Carbon fiber; Meso‑carbon; Photocatalysis and photoelectrocatalysis; TiO 2
Fields of Research (2020): 40 ENGINEERING > 4016 Materials engineering > 401605 Functional materials
40 ENGINEERING > 4004 Chemical engineering > 400404 Electrochemical energy storage and conversion
Identification Number or DOI: https://doi.org/10.1016/j.susmat.2019.e00105
URI: http://eprints.usq.edu.au/id/eprint/49049

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