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论文类型：期刊论文

发表时间：2017-07-18

发表刊物：CHEMISTRY-A EUROPEAN JOURNAL

收录刊物：SCIE、EI、PubMed、Scopus

卷号：23

期号：40

页面范围：9481-9485

ISSN号：0947-6539

关键字：CO2 reduction; colloidal quantum dots; perovskite; photocatalysis; solar fuels

摘要：Inorganic perovskite quantum dots as optoelectronic materials have attracted enormous attention in light-harvesting and emitting devices. However, photocatalytic conversion based on inorganic perovskite halides has not been reported. Here, we have synthesized colloidal quantum dots (QDs, 3-12 nm) of cesium lead halide perovskites (CsPbBr3) as a new type of photocatalytic material. The band gap energies and photoluminescence (PL) spectra are tunable over the visible spectral region according to quantum size effects on an atomic scale. The increased carrier lifetime revealed by time-resolved PL spectra, indicates the efficient electron-hole separation and transfer. As expected, the CsPbBr3 QDs with high selectivity of greater than 99% achieve an efficient yield of 20.9 mmolg(-1) towards solar CO2 reduction. This work has opened a new avenue for inorganic colloidal perovskite materials as efficient photocatalysts to convert CO2 into valuable fuels.