【作者】 党永强； 张亚婷； 蔡江涛； 刘国阳； 邱介山；

【Author】 Yong-Qiang Dang;Y.Zhang;J.-T.Cai;G.Liu;J.Qiu;College of Chemistry & Chemical Engineering,Xi’an University of Science and Technology;Faculty of Chemical,Environmental & Biological Science and Technology,Dalian University of Technology;

【机构】 西安科技大学化学与化工学院； 大连理工大学化工与环境生命学部；

【摘要】 碳量子点具有原料来源广泛、生物相容性良好、低毒以及荧光的激发依赖性等特点,近年来在生物标记与成像、离子荧光探针和光催化等领域表现出了独特的应用潜力与价值,因此受到了广泛关注[1,2]。碳量子点的制备方法可分为"自上而下"法和"自下而上"法[3]。其中,"自上而下"方法需要以碳结构规整的石墨作原料,制备过程较为复杂,成本较高,不利于大规模合成。而"自下而上"的方法如强酸氧化、高温热解等更容易实现,碳源的选择也较为自由,更有利于实现大规模制备。本文以聚乙二醇为原料,通过热解法一步制备了碳量子点,方法简单,原料易得。通过原子力显微镜、紫外可见吸收光谱、荧光光谱等对制得的碳量子点进行了表征与检测,结果表明:所制备的碳量子点直径约3 nm,并且通过调节实验参数可以在一定程度内调控碳量子点的大小及其荧光波长。更多还原

【Abstract】 Carbon quantum dots(CQDs) have excited great interest among researchers due to the size and wavelength depending luminescence emission, low toxicity, good biocompatibility and wide raw material sources. And recently CQDs have shown great promise in a variety of applications recently, like bio-labeling, imaging, detection, catalysis, and so on. The developed methods can be classified into two types, i.e. ‘‘top-down’’ methods and ‘‘bottom-up’’ approaches. However, the "top-down" methods are usually complex, time-consuming, expensive and/or inconvenient to perform. The "bottom-up" methods have wide raw material sources, and more convenient synthesized route, which make it more favorable for the large-scale preparation. Herein, we synthesize hydrophilic CQDs by using low temperature pyrolysis synthesis method, and characterize the CQDs through AFM, UV-vis spectrum and Fluorescence spectrum. The results show that the diameter of the CQDs is about 3 nm, and could be tuned slightly by controlling the synthesized parameters.更多还原