Dai Weili, Xiong Wuwan, Yu Junjie, Zhang Shuqu, Li Bing, Yang Lixia, Wang Tengyao, Luo Xubiao, Zou Jianping, Luo Shenglian
Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang, Jiangxi 330063, China.
National-Local Joint Engineering Research Center of Heavy Metals Polluants Control and Resource Utilization, Nanchang Hangkong University, Nanchang, Jiangxi 330063, China.
ACS Appl Mater Interfaces. 2020 Jun 10;12(23):25861-25874. doi: 10.1021/acsami.0c04730. Epub 2020 May 26.
BiMoO 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 CO 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 BiMoO QDs to graphene scaffolds, and abundant electrons accommodated by the rGO layers offer an electron-rich interface for CO reduction. With the benefit of the improved electron extraction and transport over the BM QDs/rGO interface, 84.8 μmol g of methanol and 57.5 μmol g of ethanol are achieved on BM QDs/rGO in 4 h with optimal composition. The total output of alcohols over BM/rGO (142.3 μmol g) is 2.2 and 4.4 times that achieved on unmodified BiMoO QDs (64.0 μmol g) and flower-like BiMoO (32.2 μmol g), respectively.
铋钼氧量子点（BM量子点，直径5纳米）均匀地原位生长在还原氧化石墨烯（rGO）层上，使石墨烯具有高可见光响应和活性，以实现高效太阳光驱动的CO还原。在光照下，小尺寸的BM量子点产生活性电子并将其转移到rGO层。由于BM量子点的形成和GO的还原是同时进行的，BM量子点与rGO之间的紧密连接使得电子能够从激发态的BiMoO量子点注入到石墨烯支架中，并且rGO层容纳的大量电子为CO还原提供了富电子界面。得益于BM量子点/rGO界面上改善的电子提取和传输，在最佳组成的BM量子点/rGO上，4小时内可实现84.8 μmol g的甲醇和57.5 μmol g的乙醇产量。BM/rGO上醇类的总产率（142.3 μmol g）分别是未修饰的BiMoO量子点（64.0 μmol g）和花状BiMoO（32.2 μmol g）的2.2倍和4.4倍。
