The A-site and B-site regulation of LaCoO3 nanofiber based on electrospinning for boosting photocatalytic CO2 conversion

Photocatalytic CO 2 reduction with perovskite can effectively address both energy and environmental issues. Nevertheless, it remains challenging to prepare photocatalysts with suitable hollow tubular structures in rational. Herein, the La 1-x Sr x Co 1-δ Fe δ O 3 nanofiber with a hollow tubular structure was fabricated through an electrospinning method. The hollow nanofiber structure was constructed by doping Sr atoms in the A-site and Fe atoms in the B-site of LaCoO 3 perovskite. The characterization of TEM proved that the hollow tubular structural La 1-x Sr x Co 1-δ Fe δ O 3 nanofiber exhibited an external diameter of about 95 nm and an internal diameter of about 50 nm. The hollow tubular structural La 1-x Sr x Co 1-δ Fe δ O 3 nanofiber showed superior carrier separation ability which could exhibit significant advantages for photocatalytic CO 2 reduction. The CH 3 OH generation rate over the optimized La 0.8 Sr 0.2 Co 0.7 Fe 0.3 O 3 nanofiber could reach 5.25 µmol⋅g −1 ⋅h −1 . This work highlighted an electrospinning strategy to build a hollow tubular structural La 1-x Sr x Co 1-δ Fe δ O 3 nanofiber for enhancing photoreduction CO 2 .