Photocatalytic Degradation of Tetracycline Hydrochloride by g-C3N4 Modified Bi2O3

doi:10.11901/1005.3093.2022.479

Chinese Journal of Materials Research

2023, Vol. 37

Issue (8): 633-640 DOI: 10.11901/1005.3093.2022.479

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Photocatalytic Degradation of Tetracycline Hydrochloride by g-C₃N₄ Modified Bi₂O₃

REN Fuyan¹^,³, OUYANG Erming²(

)

^1.School of Engineering and Construction, Nanchang University, Nanchang 330031, China
^2.School of Resources and Environment, Nanchang University, Nanchang 330031, China
^3.School of Accounting, Xinjiang University of Science and Technology, Kuerle 830091, China

Cite this article:

REN Fuyan, OUYANG Erming. Photocatalytic Degradation of Tetracycline Hydrochloride by g-C₃N₄ Modified Bi₂O₃. Chinese Journal of Materials Research, 2023, 37(8): 633-640.

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Abstract

Composite catalysts of Bi₂O₃/g-C₃N₄ were successfully prepared by means of liquid-phase precipitation and thermal polymerization methods. The microscopic morphology, crystal structure and photocatalytic properties of the composite catalysts were characterized by SEM, XRD, XPS, FT-IR and UV-Vis diffuse reflection etc. The results show that the prepared Bi₂O₃/g-C₃N₄ composite photocatalyst has good morphology and uniformity of grains. The Bi₂O₃/g-C₃N₄ composite catalyst showed good photocatalytic performance. Among all the prepared composite catalysts, the composite catalyst Bi₂O₃/g-C₃N₄-30% had the best photocatalytic performance. The removal rate of tetracycline hydrochloride (TCH) by Bi₂O₃/g-C₃N₄-30% composite catalyst was 70%, which was 1.66 times that of pure Bi₂O₃ and 1.44 times that of pure g-C₃N₄. In addition, the photocatalytic degradation of tetracycline hydrochloride was verified by capture experiments. The main active species of (TCH) is superoxide radical (·O₂^-).

Key words: inorganic non-metallic materials photocatalysis antibiotics degradation Bi₂O₃ semiconductor materials

Received: 06 September 2022

ZTFLH:

X703.1

Corresponding Authors: OUYANG Erming, Tel: 15170217718, E-mail: youmer@ncu.edu.cn

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https://www.cjmr.org/EN/10.11901/1005.3093.2022.479 OR https://www.cjmr.org/EN/Y2023/V37/I8/633

Fig.1 Schematic diagram of preparation of Bi₂O₃/g-C₃N₄ composites

Fig.2 SEM patterns of g-C₃N₄(a), Bi₂O₃ (b) and Bi₂O₃/g-C₃N₄ materials (d), TEM patterns of Bi₂O₃/g-C₃N₄ materials (c) and EDS patterns of Bi₂O₃/g-C₃N₄ material (e)

Fig.3 XRD patterns of g-C₃N₄, Bi₂O₃ and Bi₂O₃/g-C₃N₄ materials

Fig.4 FT-IR images of g-C₃N₄, Bi₂O₃ and Bi₂O₃/g-C₃N₄ materials

Fig.5 XPS image of Bi₂O₃/g-C₃N₄ composite catalyst

Fig.6 UV-Vis diffuse reflectance spectra (a) and (Ahv)^1/2 versus photon energy (hv) for g-C₃N₄, Bi₂O₃ and Bi₂O₃/g-C₃N₄ materials (b)

Fig.7 Degradation efficiency of TCH by different catalysts (a) and its first-order kinetic fitting diagram during the reaction process (b)

Fig.8 Cyclability of Bi₂O₃/g-C₃N₄ composites for degradation of TCH

Fig.9 Removal rate of tetracycline hydrochloride (a) and its corresponding removal rate histogram (b) under different trapping agent conditions

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