Tailoring perovskite quantum dots heterojunction nanocomposite toward photocatalytic reduction of CO2

Abstract

The application of photocatalytic reduction technology has a great potential to address the greenhouse impact caused by the excessive burning of fossil fuels. Perovskite quantum dots (PQDs) are excellent candidates for photocatalytic applications due to their tunable bandgap, long charge diffusion length, high- surface volume ratio, and wide visible light absorption spectrum. However, due to severe charge recombination, poor stability, and inefficient charge extraction, catalytic performance in photocatalytic CO2 reduction of pristine PQDs is limited. In this review, a brief description of CO2 photocatalysis by PQDs is given first. The varieties of perovskite-based photocatalyst heterojunctions and a few examples are listed. The most recent research on PQD composites with different dimensional materials and their synthesis techniques are presented. The catalytic characteristics of the reduction products of PQDs composites are discussed later. This review sums up the remaining deficiencies and prospects of PQDs heterojunction nanocomposite for photocatalytic CO2 reduction.