应用化学 ›› 2025, Vol. 42 ›› Issue (9): 1196-1208.DOI: 10.19894/j.issn.1000-0518.240289

• 研究论文 • 上一篇    下一篇

Zn掺杂CdS/g-C3N4复合材料的制备及其光催化性能

翟好英, 杨琴, 吴毅, 蒋洪洋, 周文俊()   

  1. 内江师范学院化学化工学院,沱江流域特色农业资源四川省科技资源共享服务平台,果类废弃物资源化四川省高等学校重点实验室,内江 641100
  • 收稿日期:2024-09-04 接受日期:2025-07-16 出版日期:2025-09-01 发布日期:2025-09-28
  • 通讯作者: 周文俊
  • 基金资助:
    国家自然科学基金(21801176);内江师范学院重点科研项目(2021ZD05)

Preparation and Photocatalytic Properties of Zn-CdS/g-C3N4 Composites

Hao-Ying ZHAI, Qin YANG, Yi WU, Hong-Yang JIANG, Wen-Jun ZHOU()   

  1. Key Laboratory of Fruit Waste Treatment and Resource Recycling of Sichuan Provincial College,Special Agricultural Resources in Tuojiang River Basin Sharing and Service Platform of Sichuan Province,College of Chemistry and Chemical Engineering,Neijiang Normal University,Neijiang 641100,China
  • Received:2024-09-04 Accepted:2025-07-16 Published:2025-09-01 Online:2025-09-28
  • Contact: Wen-Jun ZHOU
  • About author:zhwj84@126.com
  • Supported by:
    the National Natural Science Foundation of China(21801176);the Key Research Project of Neijiang Normal University(2021ZD05)

摘要:

在强光照射下,CdS量子点易发生光腐蚀现象,通过金属掺杂和复合的方式可以提高CdS的光催化性能和光稳定性。 采用水热法合成了Zn掺杂CdS/g-C3N4复合纳米材料(Zn-CdS/g-C3N4)。利用扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线衍射(XRD)、X射线光电子能谱(XPS)和傅里叶变换红外光谱(FT-IR)等手段对Zn-CdS/g-C3N4复合材料的形貌、结构和组成等进行了表征。 结果表明,Zn-CdS纳米颗粒附着在g-C3N4表面上,从而形成Zn-CdS/g-C3N4复合材料,且复合后材料带隙减小,光生电子-空穴复合率降低。 在500 W Xe灯照射下,研究了Zn-CdS/g-C3N4对罗丹明B(RhB)的光催化降解性能。 在最优条件下,光照40 min后,所制备的Zn-CdS/g-C3N4对RhB的光催化降解效率达99%。 此外,所合成的Zn-CdS/g-C3N4复合材料光稳定性较高、可再生性好。 这归因于Zn和Cd的协同作用以及与g-C3N4的复合,促进了光生载流子的分离和转移。

关键词: 硫化镉, 石墨相氮化碳(g-C3N4), 水热法, 罗丹明B, 光催化降解

Abstract:

Under strong light irradiation, CdS quantum dots are prone to photocorrosion. The photocatalytic performance and photostability of CdS can be improved by metal doping and recombination. In this paper, Zn-doped CdS/g-C3N4 composite nanomaterials (Zn-CdS/g-C3N4) were synthesized by a hydrothermal method. The morphology, structure and composition of Zn-CdS/g-C3N4 were characterized by scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray diffraction (XRD), X-ray photoelectron spectrometer (XPS) and Fourier transform infrared spectroscopy (FT-IR). The results show that Zn-CdS nanoparticles are attached on g-C3N4 to form Zn-CdS/g-C3N4 composite nanomaterials with the smaller band gap and lower recombination rate of electron-hole. The photocatalytic performance of Zn-CdS/g-C3N4 for rhodamine B (RhB) was studied. Under the optimum conditions, the photocatalytic degradation efficiency of as-prepared Zn-CdS/g-C3N4 is up to 99% after 40 min of light irradiation with 500 W Xe lamp. In addition, the synthesized Zn-CdS/g-C3N4 composites have high photostability and good reproducibility. This is attributed to the synergistic effect between Zn and Cd and the recombination with g-C3N4, which promotes the separation and transfer of photogenerated carriers.

Key words: CdS, g-C3N4, Hydrothermal method, Rhodamine B, Photocatalytic degradation

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