Mesoporous g-C3N4 /MXene (Ti3C2Tx) heterojunction as a 2D electronic charge transfer for efficient photocatalytic CO2 reduction

Photocatalytic CO2 reduction reactions (CO(2)RRs) are of significant interest for its application prospects in energy field and CO2 removal in air. Herein we report mesoporous g-C3N4/Ti3C2Tx (MCT) as a highly active photo catalyst in CO2 reduction reactions. We have found that mesoporous structures are compatible with high speed electronic transmission systems and demonstrate that MCT enables the excellent separation of electrons and holes. Mesoporous g-C3N4/Ti3C2Tx (MCT) shows a production of CH4 (2.117 mu mol.g(-1).h(-1)), which is 2.4 times than that of mesoporous g-C3N4 (MC). Large contact area of the catalyst has numerous adsorption sites for CO2 as a result of the catalysts' mesoporous structures. The MCT catalyst also possess an efficient separation of the charge carriers due to the high speed electronic transmission system of MXene.

Automated summary

Mesoporous g-C3N4/Ti3C2Tx (MCT) exhibits high activity as a photo catalyst for CO2 reduction reactions, with efficient separation of charge carriers due to its compatibility with high speed electronic transmission systems. The production of CH4 with MCT catalyst is 2.4 times higher than that with mesoporous g-C3N4 (MC) due to the large contact area and numerous adsorption sites for CO2 provided by its mesoporous structures.