Light-Facilitated Structure Reconstruction On Self-Optimized Photocatalyst Tio2@Biocl For Selectively Efficient Conversion Of Co2 To Ch4

Developing well-designed photocatalysts with optimal activity and selectivity is a promising strategy for converting CO2 to renewable fuels. Herein, a self-optimized photocatalyst TiO2@BiOCl is prepared by facile growth of ultrathin BiOCl lamina on the defective surface of TiO2 nanotube. Facilitated from light irradiation, Hincorporated oxygen vacancies form on defective TiO2 nanotube matrix to extend light adsorption range, meanwhile Bi-0 atom is reduced from BiOCl lamina to restructure atomic heterojunction BiOCl-Bi-0-TiO2. Bi-0 atom pours photo-generated electrons directly to Ti3+ in H-incorporated oxygen vacancy, gathering electrons efficiently to accelerate the photocatalytic efficiency. Bi-Ti dual metal sites and H-incorporated oxygen vacancies optimize CO2 reduction path to achieve high CH4 selectivity. Finally, the magnificent surface-reconstruction on TiO2@BiOCl chalks up highest CH4 productivity rate of 168.5 mu mol and optimal CH4 selectivity of 99.4 % during CO2 photoreduction. Thus, the pioneering construction of efficient photocatalyst with self-optimized strategy paves a new way to fabricate efficient photocatalyst.