Liu Quanrun, Zhang Jingjie, He He, Huang Guangxu, Xing Baolin, Jia Jianbo, Zhang Chuanxiang
College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454003, China.
Collaborative Innovation Center of Coal Work Safety of Henan Province, Jiaozuo 454003, China.
Nanomaterials (Basel). 2018 Oct 17;8(10):844. doi: 10.3390/nano8100844.
Coal tar pitch (CTP), a by-product of coking industry, has a unique molecule structure comprising an aromatic nucleus and several side chains bonding on this graphene-like nucleus, which is very similar to the structure of graphene quantum dots (GQDs). Based on this perception, we develop a facile approach to convert CTP to GQDs only by oxidation with hydrogen peroxide under mild conditions. One to three graphene layers, monodisperse GQDs with a narrow size distribution of 1.7 ± 0.4 nm, are obtained at high yield (more than 80 wt. %) from CTP. The as-produced GQDs are highly soluble and strongly fluorescent in aqueous solution. This simple strategy provides a feasible route towards the commercial synthesis of GQDs for its cheap material source, green reagent, mild condition, and high yield.
煤焦油沥青（CTP）是焦化工业的一种副产品，具有独特的分子结构，由一个芳香核和连接在这个类石墨烯核上的几个侧链组成，这与石墨烯量子点（GQDs）的结构非常相似。基于这一认识，我们开发了一种简便的方法，仅在温和条件下用过氧化氢氧化就能将CTP转化为GQDs。从CTP中以高产率（超过80 wt.%）获得了一到三层石墨烯、尺寸分布狭窄（1.7±0.4 nm）的单分散GQDs。所制备的GQDs在水溶液中具有高溶解性和强荧光性。这种简单的策略为GQDs的商业合成提供了一条可行的途径，因为其原料来源廉价、试剂绿色、条件温和且产率高。
