Anchoring 0D CeO2 Nanoparticles on 2D LaTiO2N Nanosheets for Efficient Visible‐Light‐Driven Photocatalytic CO2 Reduction

Abstract The efficiency of photocatalytic reduction of CO 2 with water to hydrocarbons is largely limited by high recombination rate of photogenerated electrons and holes in the photocatalysts. Herein, 0D/2D CeO 2 /LaTiO 2 N S‐scheme heterojunction photocatalyst prepared by simple in‐situ hydrothermal approach realizes the overall conversion of gaseous CO 2 and H 2 O without any sacrificial reagent and cocatalyst. The yields of CH 4 and CO over CeO 2 /LaTiO 2 N sample under visible light for 3 h are 1.5 and 7.2 μmol g −1 , and the corresponding utilized photoelectron number (UPN) is 26.4 μmol g −1 , about 7.3 and 7.8 times that of individual LaTiO 2 N and CeO 2 , respectively. The enhanced photocatalytic activity of 0D/2D CeO 2 /LaTiO 2 N is attributed to the constitution of the S‐scheme heterojunction, which effectively inhibits the recombination of photogenerated carriers. This study is expected to provide a new insight into the construction of efficient 0D/2D photocatalysts for visible‐light‐driven photocatalytic CO 2 reduction.