Cheng RChung C.-CWang SCao BZhang MChen CWang ZChen MShen SFeng S.-P.CHUN-WEI CHEN2021-08-052021-08-05202125425293https://www.scopus.com/inward/record.uri?eid=2-s2.0-85100427715&doi=10.1016%2fj.mtphys.2021.100358&partnerID=40&md5=85afc6e11c1002ff306ae5d28af62520https://scholars.lib.ntu.edu.tw/handle/123456789/576905A well-designed scaffold that allows the full exposure of nanophotocatalyst to reactants is equally important with an efficient catalyst material in realizing a high-performance photocatalytic reaction. In this work, we develop a three-dimensional (3D) bandgap tunable perovskite quantum dots (PQDs)/polyethersulfone (PES) monolithic film to maximize the specific area and enhance light harvesting, thereby making full use of PQDs in solar-driven CO2 reduction. The PQDs are electrostatically self-attached to the 3D PES scaffold with minimal agglomeration and clustering so that can be fully exposed to gaseous reactant and sustaining its superior high surface/volume ratio. Through composition engineering, the small-bandgap I-rich CsPbIxBr3-x PQDs along with the 3D PES scaffold achieve a high electron consumption rate of 64.90 μmol g?1 h?1, exceeding all the reported PQD-based single photocatalysts in CO2 photoreduction. Our work provides a new platform to fully exploit the perovskite nanomaterials by constructing 3D nanocatalyst/polymer film for highly efficient photocatalytic reactions. ? 2021 Elsevier LtdBromine compounds; Carbon dioxide; Energy gap; Nanocatalysts; Nanocrystals; Perovskite; Potential energy surfaces; Scaffolds; Semiconductor quantum dots; Consumption rates; Efficient catalysts; Gaseous reactants; Light-harvesting; Monolithic films; Photo-reduction; Photocatalytic reactions; Threedimensional (3-d); Lead compoundsjournal article10.1016/j.mtphys.2021.1003582-s2.0-85100427715