期刊
ACS APPLIED MATERIALS & INTERFACES
卷 12, 期 23, 页码 25861-25874出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c04730
关键词
Bi2MoO6 quantum dots; in situ growth; reduced graphene oxide; CO2 reduction; electron-rich interface
资金
- National Natural Science Foundation of China [51662031, 51572119, 51720105001, 51868051]
Bi2MoO6 quantum dots (BM QDs, 5 nm in diameter) are evenly in situ grown on reduced graphene oxide (rGO) layers, sensitizing the graphene with high visible light response and activity for efficient solar light-driven CO2 reduction. Under irradiation, small-sized BM QDs generate active electrons and donate them to the rGO layers. Since the formation of BM QDs and the reduction of GO are undergone simultaneously, a close connection between BM QDs and rGO enables the electron injection from excited Bi2MoO6 QDs to graphene scaffolds, and abundant electrons accommodated by the rGO layers offer an electron-rich interface for CO2 reduction. With the benefit of the improved electron extraction and transport over the BM QDs/rGO interface, 84.8 mu mol g(-1) of methanol and 57.5 mu mol g(-1) of ethanol are achieved on BM QDs/rGO in 4 h with optimal composition. The total output of alcohols over BM/rGO (142.3 mu mol g(-1)) is 2.2 and 4.4 times that achieved on unmodified Bi2MoO6 QDs (64.0 mu mol g(-1)) and flower-like Bi2MoO6 (32.2 mu mol g(-1)), respectively.
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