Journal
CHEMICAL ENGINEERING JOURNAL
Volume 446, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2022.137028
Keywords
g-C3N4; Ti(3)C(2)Tx; Copper; Photocatalytic; CO2 reduction
Categories
Funding
- Guangxi Natural Science Foundation [2019GXNSFAA245006, 2022GXNSFBA035483, 2020GXNSFDA2 97007]
- National Natural Science Foundation of China [22078074]
- Opening Project of Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology [2021K009]
- Special funding for Guangxi Bagui Scholars, Scientific Research Foundation for High-level Personnel from Guangxi University
- high-performance computing platform of Guangxi University
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This study utilizes Cu-Ti3C2Tx as cocatalysts to enhance the photocatalytic performance of g-C3N4. The optimized Cu-Ti3C2Tx/g-C3N4 catalyst exhibits high CO2 reduction performance and stability.
Graphitic carbon nitride (g-C3N4) is regarded as a promising photocatalyst for photocatalytic CO2 reduction into valuable solar fuels. In this work, Cu-Ti3C2Tx was used as efficient cocatalysts to enhance the photocatalytic performance of g-C3N4. The tight interface between Cu-Ti3C2Tx and g-C(3)N(4 )significantly promote the separation of photogenerated electrons and holes. In addition, the Cu and the Ti3C2Tx can act as the fast transport channels for the photogenerated electrons, and the interface between the Cu and Ti3C2Tx can act as the active sites for the adsorption and activation of CO2 . The optimized Cu-Ti3C2Tx /g-C3N4 exhibited the highest photocatalytic CO2 reduction performance with the yield of CO2 and CH4 reached 49.02 and 3.6 mu mol.g(-1), respectively, which was 9.0 and 9.2 times than that of pristine g-C3N4. Moreover, the optimized Cu-Ti3C2Tx /g-C(3)N(4 )photocatalyst maintained satisfactory stability. This work will offer new insight into modulating g-C(3)N(4)with an MXene-metal-based cocatalyst for photocatalytic CO2 reduction.
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