76 / 2019-10-28 20:55:05

ENHANCED PERFORMANCE OF VISIBLE-LIGHT-DRIVEN PHOTOCATALYTIC REMOVAL OF NO BY COMPOSITE GRAPHENE OXIDE WITH CSPBBR3 PEROVSKITE QUANTUM DOT

CsPbBr3 perovskite quantum dot, photocatalyst, visible-light, NO removal

Halide perovskites quantum dots (QDs) due to their broad and tunable absorption cross section, superior charge carrier transport properties and carrier lifetime regarded as the most promising photovoltaic materials for solar cells and light emitting diodes (LEDs), moreover, it also has attracted extensive attention in the field of photocatalysis in recent years especially CsPbBr3 QDs. Herein, CsPbBr3 QDs were prepared by a conventional hot-injection method, then use it as a novel photocatalyst to degrade NO. The photocatalytic NO removal ratio of CsPbBr3 QDs under visible light illumination is 58.8%. Additionally, a series of CsPbBr3 QDs/GO nanocomposites were successfully synthesized, it was found that graphene oxide (GO) could significantly improve the performance of photocatalytic NO purification, and a high removal ratio of 99.0% is achieved by the compound CsPbBr3 QDs/GO-40 mg (the weight ratio is 100:40) photocatalyst. The possible NO photocatalysis mechanism over CsPbBr3 QDs/GO composites was then proposed in the work.