Microwave-assisted construction of Bi2MoO6/g-C3N4 heterostructure for boosting photocatalytic CO2 conversion

Photocatalytic CO 2 reduction can simultaneously alleviate the energy crisis and solve environmental issues. Nevertheless, it is still challenging for designing photocatalysts with efficient carrier mobility in rational. Herein, the Bi 2 MoO 6 /g-C 3 N 4 (BMO/CN) heterostructure was constructed through a microwave-assisted which could enhance the construction of two-dimensional and two-dimensional (2D/2D) structures. The 2D/2D BMO/CN heterojunction possessed excellent charge separation efficiency which exhibited superior performance on photocatalytic CO 2 reduction. It was shown by the characterization that the (131) surface of Bi 2 MoO 6 was constructed with the (100) surface of g-C 3 N 4 . The work functions of Bi 2 MoO 6 and g-C 3 N 4 were determined to be 4.57 and 4.22 eV, respectively, which suggested the type-II heterojunction was formed. The formation of CO and CH 3 OH over the optimized BMO/CN-30% catalyst reached 2.44 and 3.61 µmol⋅g −1 ⋅h −1 , respectively. The immediate products of HCO 3 - were observed within in-situ FT-IR to further certify the evolution of CH 3 OH. This work highlighted a microwave-assisted strategy to build a heterojunction structure for enhancing photoreduction CO 2 .