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 bur-geoning 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 photo -catalytic 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 mu M h-1, which is 13.3-times than that of the pristine CTFs. Addi-tionally, 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.

Automated summary

This study presents a novel approach for photocatalytic hydrogen peroxide production using porous CsPbBr3 quantum dots-decorated CTFs nanocomposites. The nanocomposites exhibit significantly enhanced photocatalytic activity and achieve high solar-to-chemical conversion efficiency. This work opens up new avenues for utilizing halide perovskite quantum dots and CTFs in various photocatalytic reactions.