CsPbBr3 quantum dots-decorated porous covalent triazine frameworks nanocomposites for enhanced solar-driven H2O2 production

Hydrogen peroxide (H2O2) artificial photocatalysis technology promises a bright prospect in solving the burgeoning energy and environmental challenges. Covalent triazine frameworks (CTFs) is an exciting group of promising photocatalysts for H2O2 production. However, single CTF still suffers from unsatisfactory photocatalytic behavior primarily owing to the severe charge recombination and the lack of proficient dioxygen (O2) adsorption/activation catalytic sites. Herein, porous CsPbBr3 quantum dots (QDs)-decorated CTFs (CsPbBr3/CTFs) nanocomposites were prepared through an in-situ composite method for robust photocatalytic H2O2 evolution from O2 without using any sacrificial agents. The nanocomposites exhibit a significantly boosted performance toward photocatalytic H2O2 production compared with pristine CsPbBr3 and CTFs. The reaction activity can reach a highest value of 134.6 μM h−1, which is 13.3-times than that of the pristine CTFs. Additionally, the rationally designed porous CsPbBr3/CTFs nanocomposites achieved a solar-to-chemical conversion efficiency of 0.14%, beyond most photocatalysts previously reported. The unique composite effect is key to synergistically enhance charge separation and achieve efficient H2O2 production. This work is anticipated to offer alternative avenues to exploit halide perovskite QDs and CTFs in various photocatalytic reactions. CsPbBr3quantum dots-decorated porous covalent triazine frameworks are fabricated by an in-situ composite strategy. Due to its unique composite effect and efficient electron-hole charge separation, the as-developed CsPbBr3/CTF-2 can readily work as a photocatalyst for high performance H2O2 production. [Display omitted] •A porous CsPbBr3 quantum dots (QDs)-decorated CTF (CsPbBr3/CTF) composites are fabricated by a simple yet efficient in-situ composite method.•The CsPbBr3/CTF possesses unique hierarchical porous and hollow nanostructures with a large specific surface area.•The CsPbBr3/CTF can be used as photocatalyst in high-performance H2O2 production.