光催化
光电流
三元运算
材料科学
热液循环
复合数
吸收边
化学工程
吸收(声学)
催化作用
金属有机骨架
化学
光电子学
复合材料
吸附
带隙
物理化学
有机化学
工程类
程序设计语言
计算机科学
作者
Li Wang,Zhiting Zhang,Qi Han,Ying Liu,Junbo Zhong,Jiufu Chen,Jingwei Huang,Houde She,Qizhao Wang
标识
DOI:10.1016/j.apsusc.2022.152645
摘要
Commercial TiO2 (P25) is a potentially promising catalyst for photocatalytic CO2 reduction. Nonetheless, the inefficient light capture ability and egregious charge recombination restrict its further utilization. In this work, CdS and P25 are incorporated to form the composite CdS-P25, which is further immobilized on the surface of a copper-based organic metal framework (MOF), ZIF-67, so as to establish a ternary hybrid CdS-P25/ZIF-67 via a facile hydrothermal method. On the basis of the enhancement in light absorption resulted from the formation of CdS-P25, the incorporation of ZIF-67 further prolongs the light absorption edge of CdS-P25/ZIF-67, up to 552 nm. In addition, the introduction of ZIF-67 with the dual Z-Scheme system constructed could significantly suppress the charge recombination, as revealed by the transient photocurrent value of CdS-P25/ZIF-67, which is 3.47 μA cm−2, about 20.4 times than that of CdS-P25. Accordingly, the photocatalytic assessment of CdS-P25/ZIF-67 also presents a significantly amelioration in CO2 reduction reaction (CO2RR) in comparison with either CdS-P25 or ZIF-67, giving 1.58 μmol h−1 CH4 and 1.49 μmol h−1 CO production. Our work sheds light on the investigation of efficacious construction of P25 based hybrids for light-driven photocatalysis.
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