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Encapsulating Perovskite Quantum Dots in Iron‐Based Metal–Organic Frameworks (MOFs) for Efficient Photocatalytic CO 2 Reduction
Author(s) -
Wu LiYuan,
Mu YanFei,
Guo XiaoXuan,
Zhang Wen,
Zhang ZhiMing,
Zhang Min,
Lu TongBu
Publication year - 2019
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201904537
Subject(s) - perovskite (structure) , photocatalysis , quantum yield , catalysis , metal organic framework , quantum dot , artificial photosynthesis , halide , chemical engineering , materials science , electron transfer , porphyrin , metal , chemistry , nanotechnology , photochemistry , inorganic chemistry , organic chemistry , adsorption , quantum mechanics , engineering , fluorescence , physics
Improving the stability of lead halide perovskite quantum dots (QDs) in a system containing water is the key for their practical application in artificial photosynthesis. Herein, we encapsulate low‐cost CH 3 NH 3 PbI 3 (MAPbI 3 ) perovskite QDs in the pores of earth‐abundant Fe‐porphyrin based metal organic framework (MOF) PCN‐221(Fe x ) by a sequential deposition route, to construct a series of composite photocatalysts of MAPbI 3 @PCN‐221(Fe x ) ( x =0–1). Protected by the MOF the composite photocatalysts exhibit much improved stability in reaction systems containing water. The close contact of QDs to the Fe catalytic site in the MOF, allows the photogenerated electrons in the QDs to transfer rapidly the Fe catalytic sites to enhance the photocatalytic activity for CO 2 reduction. Using water as an electron source, MAPbI 3 @PCN‐221(Fe 0.2 ) exhibits a record‐high total yield of 1559 μmol g −1 for photocatalytic CO 2 reduction to CO (34 %) and CH 4 (66 %), 38 times higher than that of PCN‐221(Fe 0.2 ) in the absence of perovskite QDs.