Porous hypercrosslinked polymer-TiO<sub>2</sub>-graphene composite photocatalysts for visible-light-driven CO<sub>2</sub> conversion.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 30737395.
- Also identified by DOI 10.1038/s41467-019-08651-x and PMC identifier 6368626.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
Significant efforts have been devoted to develop efficient visible-light-driven photocatalysts for the conversion of CO<sub>2</sub> to chemical fuels. The photocatalytic efficiency for this transformation largely depends on CO<sub>2</sub> adsorption and diffusion. However, the CO<sub>2</sub> adsorption on the surface of photocatalysts is generally low due to their low specific surface area and the lack of matched pores. Here we report a well-defined porous hypercrosslinked polymer-TiO<sub>2</sub>-graphene composite structure with relatively high surface area i.e., 988 m<sup>2</sup> g<sup>-1</sup> and CO<sub>2</sub> uptake capacity i.e., 12.87 wt%. This composite shows high photocatalytic performance especially for CH<sub>4</sub> production, i.e., 27.62 μmol g<sup>-1</sup> h<sup>-1</sup>, under mild reaction conditions without the use of sacrificial reagents or precious metal co-catalysts. The enhanced CO<sub>2</sub> reactivity can be ascribed to their improved CO<sub>2</sub> adsorption and diffusion, visible-light absorption, and photo-generated charge separation efficiency. This strategy provides new insights into the combination of microporous organic polymers with photocatalysts for solar-to-fuel conversion.