| Abstract |
The application of covalent organic frameworks (COFs) for the photocatalytic reduction of CO2 is mostly limited by severe charge recombination and low sunlight utilization. Herein, a triazine-based COF with an electron-rich and large π-conjugated system (TCOF) was employed as a building block and integrated with CuInS2 (CIS) to construct a noble-metal-free and high-efficiency photocatalyst for CO2 reduction. The in situ growth of CIS nanosheets on TCOF creates a p-n heterojunction, named CIS@TCOF. Compared with TCOF, the CIS@TCOF heterostructure exhibits a dramatically boosted photocatalytic performance in the reduction of CO2. The produced HCOOH yield over 10 wt % CIS@TCOF can be up to 171.2 μmol g-1 h-1 under visible light irradiation with good reproducibility, which is about 3 times as high as that over TCOF. Further in-depth studies indicate that the introduction of CIS not only enhances the visible light utilization but also restrains the recombination of photogenerated electron-hole pairs efficiently and facilitates the photoinduced charge transfer via the p-n heterojunction system due to the unique structural and compositional features. This research shows the great potential of COFs as efficient photocatalytic carbon fixation materials and provides a versatile route to construct semiconductor-COF heterostructures for photocatalysis. |
| Authors |
Shuqing Chang , Feng Ye  , Yuehong Zhao , Yanghe Fu , Hekun Jia , Yijing Gao , Fumin Zhang , Rui Ma , Xinqing Lu , Maohong Fan  , Weidong Zhu
|
| Journal Info |
American Chemical Society | ACS Applied Materials & Interfaces , vol: 16
, iss: 11
, pages: 13839 - 13848
|
| Publication Date |
3/6/2024 |
| ISSN |
1944-8244 |
Type |
article |
| Open Access |
closed
|
| DOI |
https://doi.org/10.1021/acsami.3c19525 |
| Keywords |
CO2 Capture (Score: 0.561297) , CO2 Reduction (Score: 0.550658) , Metal-Organic Frameworks (Score: 0.550272) , Photocatalysts (Score: 0.550041) , Carbon Dioxide Capture (Score: 0.519296)
|
