Abstract
A novel Bi12SiO20/BiOBr composite film was successfully fabricated from Bi plate via in-situ electrochemical-ion-exchange with Bi plate as anode and Ti sheet as cathode. Bi12SiO20/BiOBr film exhibits superior photocatalytic CO2 reduction activity and stability under Xe-lamp irradiation, 1.5 times higher than BiOBr film after three recycles. A plausible formation mechanism of Bi12SiO20/BiOBr film is proposed and investigated. Our findings should provide preponderant insights and ideas into faultlessly designing in-situ immobilization technology of photocatalyst for application in CO2 reduction to solar fuels.
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