石油化工高等学校学报 ›› 2024, Vol. 37 ›› Issue (5): 56-64.DOI: 10.12422/j.issn.1006-396X.2024.05.007

• 催化剂及催化材料 • 上一篇    下一篇

g⁃C3N4/Co3O4的制备及其光催化降解四环素研究

马馨月(), 陈雷, 王芳芳, 陈常东()   

  1. 辽宁石油化工大学 石油化工学院,辽宁 抚顺 113001
  • 收稿日期:2024-01-23 修回日期:2024-03-20 出版日期:2024-10-25 发布日期:2024-11-01
  • 通讯作者: 陈常东
  • 作者简介:马馨月(1999⁃),女,硕士研究生,从事光(电)催化材料方面的研究;E⁃mail:1727267148@qq.com
  • 基金资助:
    国家留学基金委公派访学学者面上项目(CSC202008210025);教育部“春晖计划”合作科研项目(2020703?8);辽宁省教育厅项目(LJKMZ20220736)

Preparation of g⁃C3N4/Co3O4 and Its Photocatalytic Degradation of Tetracycline

Xinyue MA(), Lei CHEN, Fangfang WANG, Changdong CHEN()   

  1. School of Petrochemical Engineering,Liaoning Petrochemical University,Fushun Liaoning 113001,China
  • Received:2024-01-23 Revised:2024-03-20 Published:2024-10-25 Online:2024-11-01
  • Contact: Changdong CHEN

摘要:

利用太阳能光催化降解污染物,是解决水污染问题并实现太阳能转化最有前途的技术之一。应用煅烧法,以六水合硝酸钴(Co(NO32·6H2O)、尿素(NH4CNO)为原料,通过改变g-C3N4的加入量,制备了g-C3N4质量分数不同的g-C3N4/Co3O4催化剂;利用X射线衍射(XRD)、X射线光电子能谱(XPS)、紫外-可见吸收光谱(UV-vis DRS)测试,对催化剂进行了分析和表征;为推测催化剂的活性物种,对其进行了捕获剂实验。结果表明,g-C3N4与Co3O4的协同作用可提高两相界面间载流子的转移和分离效率;在可见光下,g-C3N4质量分数为10%的g-C3N4/Co3O4对四环素的降解效果最佳,降解率为66.50%,高于纯Co3O4对四环素的降解率(35.90%);催化剂的活性物种主要为超氧自由基(·O2-)和空穴(h+);Co3O4与g-C3N4的复合,改善了Co3O4电子-空穴对复合过快、带隙小和光吸收能力弱等不足,为今后有机污染物的降解提供了思路。

关键词: 光催化, 四氧化三钴, 四环素, 异质结, 石墨氮化碳

Abstract:

The use of solar photocatalytic degradation of pollutants is one of the most promising technologies to solve water pollution problems and achieve solar energy conversion. By changing the amount of g-C3N4 added, g-C3N4/Co3O4 catalysts with different g-C3N4 mass fractions are prepared based on the calcination method with cobalt nitrate hexahydrate (Co(NO3)2-6H2O) and urea (NH4CNO) as raw materials. The samples are analyzed and characterized using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and ultraviolet visible absorption spectroscopy (UV-vis DRS). To speculate on the active species of the catalyst, capture agent experiments are conducted on it. The results indicate that the synergistic effect between g-C3N4 and Co3O4 can improve the transfer and separation efficiency of charge carriers at the interface between the two phases. Under visible light, the degradation effect of 10% g-C3N4/Co3O4 is the best, with a degradation rate of 66.50%, which is higher than the degradation effect of single Co3O4 (degradation rate of 35.90%). The active species of the catalyst are mainly superoxide radicals(·O2-) and holes(h+). After compounding with g-C3N4, the drawbacks of Co3O4 electron hole pair, such as too fast recombination and a deficient energy level structure, are improved, providing ideas for the degradation of organic pollutants in the future.

Key words: Photocatalysis, Cobalt tetroxide, Tetracycline, Heterojunction, Graphite nitride carbon

中图分类号: 

引用本文

马馨月, 陈雷, 王芳芳, 陈常东. g⁃C3N4/Co3O4的制备及其光催化降解四环素研究[J]. 石油化工高等学校学报, 2024, 37(5): 56-64.

Xinyue MA, Lei CHEN, Fangfang WANG, Changdong CHEN. Preparation of g⁃C3N4/Co3O4 and Its Photocatalytic Degradation of Tetracycline[J]. Journal of Petrochemical Universities, 2024, 37(5): 56-64.

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