Flexible Carbon-Fiber/Semimetal Bi Nanosheet Arrays as Separable and Recyclable Plasmonic Photocatalysts and Photoelectrocatalysts

Yang, Yanling and Chen, Huajun and Zou, Xinxin and Shi, Xiao-Lei ORCID: https://orcid.org/0000-0003-0905-2547 and Liu, Wei-Di and Feng, Lei and Suo, Guoquan and Hou, Xiaojiang and Ye, Xiaohui and Zhang, Li and Sun, Chenghua and Li, Haisheng and Wang, Changqing and Chen, Zhi-Gang ORCID: https://orcid.org/0000-0002-9309-7993 (2020) Flexible Carbon-Fiber/Semimetal Bi Nanosheet Arrays as Separable and Recyclable Plasmonic Photocatalysts and Photoelectrocatalysts. ACS Applied Materials and Interfaces, 12 (22). pp. 24845-24854. ISSN 1944-8244


Abstract

In this work, we prepared flexible carbon-fiber/semimetal Bi nanosheet arrays from solvothermal-synthesized carbon-fiber/Bi2O2CO3 nanosheet arrays via a reductive calcination process. The flexible carbon-fiber/semimetal Bi nanosheet arrays can function as photocatalysts and photoelectrocatalysts for 2,4-dinitorphenol oxidation. Compared with carbon-fiber/Bi2O2CO3 nanosheet arrays, the newly designed flexible carbon-fiber/semimetal Bi nanosheet arrays show enhanced ultraviolet–visible (UV–vis) light absorption efficiency and photocurrent, photocatalytic, and photoelectrocatalytic activities. Photocatalytic analyses indicate that the surface plasmon resonance (SPR) of semimetal Bi occurs under solar-simulated light irradiation during the photocatalytic process. The carbon-fiber traps the hot electrons exerted from the SPR of semimetal Bi and creates holes in the semimetal Bi nanosheets, which boosts the photocatalytic activity of the carbon fiber through plasmonic sensitization. Both photocatalytic experiments and density functional theory (DFT) calculations indicate that the electrons transferred to the carbon fiber and the holes created in semimetal Bi contribute to the formation of •O2– and •OH, respectively. The synergistic effect between electrocatalysis and photocatalysis under the solar-simulated light results in almost complete degradation of 2,4-dinitorphenol during the photoelectrocatalytic process. This work realizes a non-noble-metal plasmonic catalyst and provides a new avenue for the commercialization of photocatalysis and photoelectrocatalysis using the separable and recyclable carbon-fiber/semimetal Bi nanosheet arrays in the environment-related field.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
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: 23 Jul 2020 05:23
Last Modified: 27 Jul 2020 01:58
Uncontrolled Keywords: semimetal Bi; nanosheet; surface plasmon resonance; carbon fiber; photoelectrocatalysis
Fields of Research (2008): 09 Engineering > 0912 Materials Engineering > 091205 Functional Materials
Identification Number or DOI: https://doi.org/10.1021/acsami.0c05695
URI: http://eprints.usq.edu.au/id/eprint/38889

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