Rich oxygen vacancies mediated bismuth oxysulfide crystals towards photocatalytic CO2-to-CH4 conversion

Oxygen vacancy-rich bismuth oxysulfide (Bi2O2S) with layered structure was prepared for efficient photocatalytic CO2 reduction under visible light irradiation. The existence of rich oxygen vacancies in Bi2O2S, which was proven by sufficient characterization, can provide abundant active sites, improve CO2 adsorption and activation abilities and boost the separation efficiency of photogenerated carriers, as determined by theoretical and...