3D laminated graphitic carbon nitride decorating with 2D/2D Bi2WO6/rGO nanosheets for selective photoreduction of CO2 to CO

Summary A novel Bi2WO6/rGO/3D‐GCN composite with 2D/2D/3D heterojunction is synthesized by a simple microwave‐assisted method and used as a visible‐light‐responsive photocatalyst in the CO2 reduction. The chemical properties and morphology of prepared photocatalysts are identified by a variety of analytic tools and spectroscopies. As a result, the heterojuncted Bi2WO6/3D‐GCN exhibits superior CO2 reduction performance as compared to the pristine 3D‐GCN, which may be caused by the intimate contact between Bi2WO6 and 3D‐GCN. The harvest of visible‐light absorption, reduced charge transfer resistance and suppressed recombination of electron‐hole pairs are accountable for surpassing performance of Bi2WO6/3D‐GCN. Upon further incorporation of rGO into Bi2WO6/3D‐GCN heterojunction, the photocatalytic production of CO can be notably boosted by ca. 7.9‐fold higher than 3D‐GCN, suggesting the key contribution of rGO in facilitating the interfacial charge transfer kinetics and increasing CO2 uptake. This work exemplifies a time and energy‐saving method to prepare the unique 3D GCN with laminated hexagonal structure which can serve as a shuttle for Bi2WO6 heterojunction and rGO incorporation. This Bi2WO6/rGO/3D‐GCN photocatalyst could offer the potential applications in the natural solar conversions of CO2. A Bi2WO6/rGO/3D‐GCN with 2D/2D/3D heterojunction is prepared by using a microwave‐assisted route. High visible‐light absorption, interfacial charge transfer kinetics and suppressed recombination of e‐h pairs result in the surpassing CO2 photoreduction. The obtained results could offer the potential applications in the natural solar conversions of CO2.