Xu Jiaxin, Zheng Yongjie, Tian Jingzhi, Zhao Yunpeng, Zheng Heshan
Qiqihar University Qiqihar 161006 P. R. China
RSC Adv. 2024 Nov 18;14(49):36733-36744. doi: 10.1039/d4ra06833e. eCollection 2024 Nov 11.
A facile hydrothermal approach was employed to synthesize a novel Cu-ZnO/TiO Z-heterojunction with a high density of defects, which was then utilized for the oxidative desulfurization process, demonstrating excellent photodegradation performance. The results showed that by adjusting components such as Cu, ZnO, and TiO, the removal efficiency of DBT reached 88.12% within a duration of 240 min. In the 5 repeated experiments, 7.5%Cu-ZnO/TiO still exhibited high stability and could be reused. The improved photocatalytic performance of the 7.5%Cu-ZnO/TiO composite can be attributed to its high light absorption capability and well-matched energy levels, which are due to the abundant presence of imperfections. The adoption of a Z-heterojunction has enabled efficient separation and transfer of photo-generated electrons and holes (e/h), thereby reducing the probability of charge carrier recombination.
采用一种简便的水热法合成了一种具有高密度缺陷的新型Cu-ZnO/TiO Z型异质结，然后将其用于氧化脱硫过程，表现出优异的光降解性能。结果表明，通过调整Cu、ZnO和TiO等组分，在240分钟内DBT的去除效率达到88.12%。在5次重复实验中，7.5%Cu-ZnO/TiO仍表现出高稳定性且可重复使用。7.5%Cu-ZnO/TiO复合材料光催化性能的提高可归因于其高吸光能力和匹配良好的能级，这是由于存在大量缺陷所致。采用Z型异质结能够实现光生电子和空穴（e/h）的有效分离和转移，从而降低了电荷载流子复合的概率。
