Graphene-Based Photocatalysts for CO2 Reduction

The photocatalytic reduction of CO2 stands as a pivotal reaction in the quest for high-value compound synthesis, encompassing CO, CH4, CH3OH, HCOOH, C2H5OH, and more. Extensively explored over the past decade, this process has seen the utilization of a diverse range of simple and complex semiconductor materials. Notably, graphene-based materials have emerged as critical components, serving as cocatalysts, supports, or photosensitizers in tandem with other semiconductors, thereby creating a synergistic effect that augments photocatalytic activity, fine-tunes selectivity and enhances overall stability. This chapter delves into essential facets of CO2 photocatalytic reduction, including comprehensive coverage of publication statistics, the intricacies of involved reactions, various reactor types, and the pivotal role of graphene-based materials in this context. Moreover, we present recent breakthroughs related to the application of pristine graphene, graphene oxide, reduced graphene oxide, graphene quantum dots, N-doped graphene, and their combinations with other semiconductors for CO2 reduction, offering valuable insights into the evolving landscape of this critical field.