Ma Youliang, Zhang Jing, Wang Yun, Chen Qiong, Feng Zhongmin, Sun Ting
College of Sciences, Northeastern University, Shenyang 110004, China.
School of Humanities and Sciences, Ningxia Institute of Science and Technology, Shizuishan 753000, China.
J Adv Res. 2018 Oct 31;16:135-143. doi: 10.1016/j.jare.2018.10.003. eCollection 2019 Mar.
Organic pollutants in industrial and agricultural sewage are a serious threat to the environment and human health. Achieving continuous photocatalytic degradation of organic pollutants under light and dark conditions would have exciting implications for practical sewage treatment. In this paper, CuS/g-CN composite catalysts with CuS nanoparticles anchored on g-CN sheets were successfully fabricated a simple solvothermal reaction. The morphology, structure, optical absorption characteristics, electron-hole recombination rate, and degradation performance of the as-prepared CuS/g-CN catalysts were investigated in detail. The results confirmed that the as-fabricated CuS/g-CN catalysts exhibited high Fenton-like catalytic degradation efficiencies in the dark, and rapid concerted Fenton-like catalytic, direct HO photocatalytic and CuS/g-CN photocatalytic degradation activities under visible light. Thus, the as-fabricated CuS/g-CN catalysts can degrade organic pollutants continuously during both day and night. These degradation properties, along with the simple catalyst fabrication process, will facilitate the practical application of this system in the continuous removal of organic pollutants.
工农业污水中的有机污染物对环境和人类健康构成严重威胁。实现有机污染物在光照和黑暗条件下的持续光催化降解对实际污水处理具有重要意义。本文通过简单的溶剂热反应成功制备了CuS纳米颗粒锚定在g-CN片上的CuS/g-CN复合催化剂。详细研究了所制备的CuS/g-CN催化剂的形貌、结构、光吸收特性、电子-空穴复合率和降解性能。结果表明，所制备的CuS/g-CN催化剂在黑暗中表现出高类芬顿催化降解效率，在可见光下表现出快速协同的类芬顿催化、直接的HO光催化和CuS/g-CN光催化降解活性。因此，所制备的CuS/g-CN催化剂可以在白天和黑夜持续降解有机污染物。这些降解性能以及简单的催化剂制备过程将促进该系统在连续去除有机污染物方面的实际应用。
