文献类型：期刊文献

英文题名：Composites of Graphene Quantum Dots and Reduced Graphene Oxide as Catalysts for Nitroarene Reduction

作者：Zhang, Jiali[1];Zhang, Fangwei[1];Yang, Yaoyao[1];Guo, Shouwu[1];Zhang, Jingyan[2]

机构：[1]Shanghai Jiao Tong Univ, Sch Elect Informat & Elect Engn, Dept Elect Engn, Shanghai 200240, Peoples R China;[2]East China Univ Sci & Technol, Sch Pharm, Shanghai Key Lab New Drug Design, State Key Lab Bioreactor Engn, Shanghai 200237, Peoples R China

年份：2017

卷号：2

期号：10

起止页码：7293

外文期刊名：ACS OMEGA

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000418744000104)】；

基金：The work was financially supported by the National "973 Program" of China (No. 2015CB931801), the National Natural Science foundation of China (Nos. 11374205 and 21376148).

语种：英文

摘要：Composites of graphene quantum dots (GQDs) and reduced graphene oxide (rGO) with unique three-dimensional (3D) structure are prepared and their catalytic activities for reduction of nitroarenes are explored. We demonstrate that the 3D GQDs/rGO composites are more active in nitroarene reduction than GQDs and rGO. Some of them are even more active than the Ag-embedded calcium alginate (Ag/CA) or Au-embedded calcium alginate (Au/CA) catalysts. Interestingly, their catalytic property is closely related to the ratio of GQDs to rGO in the 3D GQDs/ rGO composites and GQDs-to-rGO mass ratio of 1/4 exhibits the highest catalytic activity. Raman spectra of the composites show that GQDs-to-rGO ratio is related to the number of the surface/edge defects, indicating that the sites of defect and edges are active sites. In addition, the catalytic performance of the 3D GQDs/rGO composites is also contributed by their unique 3D network structures that are beneficial for the reactant adsorption and product diffusion. Given also the long cycling duration and the easy recovery from the reaction system, 3D GQDs/rGO composites are potential applicable metal-free catalytic system for nitorarene reduction.