▎ 摘　　要

The photoreduction of carbon dioxide (CO2) by a highly efficient Graphene@PVDF(polyvinylidene fluoride)@TiO2(titania) electrospinning film photocatalysis system was explored, achieving an innovative combination of electrospinning and hydrothermal treatment using nanoscale pristine graphene sheets. TiO2 was embedded in PVDF nanowire due to the inducement of element F, while the TiO2 nanoparticles on PVDF facilitated transporting the photo-generated electron-hole pairs to the Ti-F groups, which performed as electron-trapping sites due to the strong electronegativity of fluorine. The possible mechanism of CO2 reduction is depicted involving two distinct functional regions - the production regions (TiO2) and the consumption regions (graphene sheets) of the photo-generated electrons. In this photocatalysis system, the photo-generated electrons are quickly captured and transferred in a timely manner, efficiently suppressing the recombination of photo-generated carriers. The electron reservoirs in the graphene sheets can then accelerate the photoreduction reaction and promote the conversion of CO2 to CH4 (methane), leading to a highly efficient photoreduction of CO2 under visible light illumination, which is a promising material in new energy development, mitigating climate change.