Cu-ZnO/g-C3N4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

材料导报

2022, Vol. 36

Issue (20): 22030040-7 https://doi.org/10.11896/cldb.22030040

新型环境功能材料

Cu-ZnO/g-C₃N₄复合材料可见光催化降解环丙沙星效率及机理研究

蒋柱武^*, 史安童, 沈俊宏^*

福建工程学院生态环境与城市建设学院,福州 350118

Study on Efficiency and Mechanism of Visible-light Photocatalytic Degradation of Ciprofloxacin by Using Cu-ZnO/g-C₃N₄ Composite

JIANG Zhuwu^*, SHI Antong, SHEN Junhong^*

College of Ecological Environment and Urban Construction, Fujian University of Technology, Fuzhou 350118, China

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摘要针对抗生素类新型污染物在水环境中的污染现状及治理问题,本研究制备了Cu掺杂ZnO耦合g-C₃N₄的复合材料(Cu-ZnO/g-C₃N₄),并考察其在可见光下催化降解抗生素环丙沙星(CIP)的反应效率。通过X射线衍射(XRD)、红外光谱(FTIR)、扫描电镜(SEM)、透射电镜(TEM)、紫外-可见漫反射光谱(UV-Vis DRS)、荧光光谱(PL)和电子自旋顺磁共振(ESR)等分析手段对合成材料进行了表征,借助羟基自由基(·OH)测量技术量化了不同材料反应体系中·OH生成浓度的变化,进一步探究可能的光催化反应机理。结果表明,Cu-ZnO/g-C₃N₄复合材料在其异质结效应下具有极佳的可见光响应和增强的电荷转移性能,反应6 h后对CIP的去除效率高达97%,反应速率常数分别是ZnO、Cu-ZnO、g-C₃N₄的6.19倍、2.41倍和2.06倍,Cu-ZnO/g-C₃N₄复合材料是一种可用于去除水中微量污染物的高效可见光催化材料。

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关键词: 复合材料可见光催化降解环丙沙星羟基自由基异质结效应

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

发布日期: 2022-10-26

ZTFLH:

O649

基金资助: 国家自然科学基金(51878171)

通讯作者: ^*jiangzhuwu@126.com; cgh1210@gmail.com

作者简介: 蒋柱武,福建工程学院教授、硕士研究生导师。1997年7月、2001年3月和2006年6月分别于重庆大学、同济大学获得工学学士、硕士及博士学位。主要从事水污染控制与水质安全方面的研究。主持国家自然科学基金面上项目2项,获国家发明专利6项,发表论文40余篇。
沈俊宏,福建工程学院讲师。2008年6月、2010年6月、2018年6月分别于中国台湾云林科技大学获工学学士、硕士、博士学位。主要从事高级氧化技术及其应用于水体污染生态修复方面的研究,发表学术论文50余篇,其中SCI论文10余篇。

引用本文:

蒋柱武, 史安童, 沈俊宏. Cu-ZnO/g-C₃N₄复合材料可见光催化降解环丙沙星效率及机理研究[J]. 材料导报, 2022, 36(20): 22030040-7.
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. Materials Reports, 2022, 36(20): 22030040-7.

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http://www.mater-rep.com/CN/10.11896/cldb.22030040 或 http://www.mater-rep.com/CN/Y2022/V36/I20/22030040

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