Study on the promotion of photothermal synergistic CO2 reduction by W18O49/Bi2MoO6 heterostructure construction

A W 18 O 49 /Bi 2 MoO 6 heterojunction photocatalyst with favorable photothermocatalytic activity was constructed in this study. Its physicochemical properties were characterized and analyzed, and its photothermocatalytic performance was evaluated through catalytic activity tests conducted under full solar spectrum conditions. The results show that W 18 O 49 /Bi 2 MoO 6 exhibits superior photothermal catalytic activity compared to single Bi 2 MoO 6 and W 18 O 49 . Among them, the W 18 O 49 /Bi 2 MoO 6 heterojunction with a mass ratio of 7 % has the highest CO yield, reaching 140.03 µmol/g, which is 7.5 times higher than that of pure W 18 O 49 . The interaction between W 18 O 49 and Bi 2 MoO 6 endows W 18 O 49 /Bi 2 MoO 6 with good photogenerated carrier separation and migration efficiency, as well as photothermal catalytic activity. This provides ideas for designing photocatalysts with efficient photothermal catalytic CO 2 reduction.