Cu-ZnO/g-C<sub>3</sub>N<sub>4</sub>复合材料可见光催化降解环丙沙星效率及机理研究

doi:10.11896/cldb.22030040

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Abstract With the aim of solving the pollution and remediation issues of antibiotic pollutants in aquatic environment, a novel Cu-ZnO/g-C₃N₄ composite photocatalyst was synthesized in this work, with Cu-doped ZnO coupled with g-C₃N₄. The degradation efficiency of ciprofloxacin (CIP) in the photocatalytic process of Cu-ZnO/g-C₃N₄ under visible-light irradiation was investigated. Through various means such as X-ray diffraction analysis (XRD), Fourier-transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), transmission electron microscopy (TEM), ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis DRS), photoluminescence (PL) and electron spin resonance spectroscopy (ESR), the material properties of synthesized photocatalysts were characterized. By using the measurement technology of hydroxyl radicals (·OH), the formed concentration of ·OH during photocatalytic process was quantified to further explore possible reaction mechanism. The results demonstrate that Cu-ZnO/g-C₃N₄ possesses excellent visible-light responsivity and enhanced charge transfer ability due to a heterojunction effect, thereby CIP degradation rapidly reaching to 97% after 6 h. The reaction rate constant of Cu-ZnO/g-C₃N₄ is 6.19 times, 2.41 times and 2.06 times larger than that of ZnO, Cu-ZnO and g-C₃N₄, respectively. Thus, the synthesized Cu-ZnO/g-C₃N₄ can serve as an efficient visible-light active photocatalyst for micropollutant removal in water.

Key words： composite material visible-light photocatalytic degradation ciprofloxacin hydroxyl radicals heterojunction effect

Published: Online: 2022-10-26

CLC number:

O649

Fund:National Natural Science Foundation of China (51878171).

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	JIANG Zhuwu
	SHI Antong
	SHEN Junhong

Cite this article:

JIANG Zhuwu,SHI Antong,SHEN Junhong. Study on Efficiency and Mechanism of Visible-light Photocatalytic Degradation of Ciprofloxacin by Using Cu-ZnO/g-C₃N₄ Composite[J]. Materials Reports, 2022, 36(20): 22030040-7.

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http://www.mater-rep.com/EN/10.11896/cldb.22030040 OR http://www.mater-rep.com/EN/Y2022/V36/I20/22030040

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