Three-dimensional self-attaching perovskite quantum dots/polymer platform for efficient solar-driven CO2 reduction. (March 2021)

• Record Type: Journal Article
• Authors: Cheng, R.; Chung, C.-C.; Wang, S.; Cao, B.; Zhang, M.; Chen, C.; Wang, Z.; Chen, M.; Shen, S.; Feng, S.-P.
• Is Part Of: Materials today physics. Volume 17(2021)
• Publication Date: 2021-03
• Subjects: CO2 photoreduction -- Perovskite photocatalyst -- Quantum dot -- Polymer scaffold -- Self-attaching; Materials science -- Periodicals; Physics -- Periodicals; Electronic journals; 530.41
• DOI: 10.1016/j.mtphys.2021.100358
• Languages: English
• ISSNs: 2542-5293

Abstract

Abstract: A 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 CsPbIx Br3-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. Graphical abstract: Image 1 Highlights: Absorption-free 3D PES as an ideal substrate for loading nano-photocatalysts. Electrostatic self-attaching sustains high surface/volume ratio of PQDs after loading. High mass loading per unit area with lowest agglomeration rate. Synergistic effect of absorption and trap control on photocatalytic performance. Universal approach for constructing 3D nanocatalyst/polymer platforms.