Wu Zhenyu, Li Xinke, Zhao Yu, Li Yi, Wei Kaiqiang, Shi Hong, Zhang Tianyang, Huang Hui, Liu Yang, Kang Zhenhui
Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 199 Ren'ai Road, Suzhou 215123, China.
Macao Institute of Materials Science and Engineering, Macau University of Science and Technology, Taipa, Macau SAR 999078, China.
ACS Appl Mater Interfaces. 2021 Dec 22;13(50):60561-60570. doi: 10.1021/acsami.1c14735. Epub 2021 Dec 8.
Coproduction of hydrogen (H) and hydrogen peroxide (HO) from water splitting is one of the most promising ways to alleviate the energy crisis and environmental pollution. Here, we first show the synthesis and photocatalytic property of an organic semiconductor (DAnTMS compound) from 9,10-dibromoanthracene and trimethylsilylacetylene. Then, a metal-free photocatalyst of a DAnTMS/carbon dot (DAnTMS/CD) composite was designed and fabricated, which achieved the efficient photocatalytic production of H and HO without usage of any organic solvents and sacrificial agents. Under visible light, the DAnTMS/CD composite could produce HO with a maximum rate of 396.7 μmol g h and H with a maximum rate of 265.0 μmol g h in pure water. Transient photovoltage tests showed that CDs changed the interfacial electron transfer kinetics and served as the active site for highly efficient H evolution. This work provided a deep insight into the function of CDs in regulating the catalytic property of organic photocatalysts.
通过水分解联产氢气（H）和过氧化氢（HO）是缓解能源危机和环境污染最具前景的方法之一。在此，我们首次展示了由9,10-二溴蒽和三甲基硅乙炔合成的有机半导体（DAnTMS化合物）及其光催化性能。然后，设计并制备了一种无金属的DAnTMS/碳点（DAnTMS/CD）复合材料光催化剂，该催化剂在不使用任何有机溶剂和牺牲剂的情况下实现了高效光催化产H和HO。在可见光下，DAnTMS/CD复合材料在纯水中产HO的最大速率为396.7 μmol g h，产H的最大速率为265.0 μmol g h。瞬态光电压测试表明，碳点改变了界面电子转移动力学，并作为高效析氢的活性位点。这项工作深入了解了碳点在调节有机光催化剂催化性能方面的作用。
