高荧光量子产率掺氮碳量子点的制备及表征  

Preparation and characterization of highly photoluminescent quantum yield N-CQDs

作　　者：杨继亮[1] 蒋倩倩 岳贤田[1] Yang Jiliang;Jiang Qianqian;Yue Xiantian(Chaohu University,Hefei 238000;Anhui Normal University,Wuhu 241002)

机构地区：[1]巢湖学院,合肥238000 [2]安徽师范大学,芜湖241002

出　　处：《化工新型材料》2021年第12期133-136,共4页New Chemical Materials

基　　金：安徽省高校自然科学研究项目(KJ2019A0678);巢湖学院校极科学研究项目(XLZ-201805和XLZ-201806)。

摘　　要：以无水柠檬酸为碳源,以三羟甲基氨基甲烷(Tris)为氮源,采用一步水热法制备高荧光量子产率掺氮碳量子点(N-CQDs)。在单因素实验的基础上通过研究反应温度、反应时间和Tris质量及其交互作用对荧光量子产率(QY)的影响。利用透射电镜(HRTEM)、红外光谱(FT-IR)、紫外-可见光(UV-Vis)等分析手段对所制备的N-CQDs的形貌、表面官能团、荧光特征进行分析。结果表明:高荧光量子产率N-CQDs的最佳制备工艺条件为反应温度160℃,反应时间5h,Tris质量0.6g,获得的N-CQDs荧光量子产率达73.51%。N-CQDs直径分布约在5~25nm范围内,在365nm紫外光照射下发出蓝紫色荧光,表面含有大量含氮及含氧官能团(如—NH、C=O、C—O等)。The synthesis of highly photoluminescent quantum yield(QY)nitrogen doped carbon quantum dots(N-CQDs)by hydrothermal carbonization from Anhydrous citric acid as the carbon source and trishydroxymethyl aminomethane(Tris)as the nitrogen source was studied.Based on a single factor test,the effects of variables including reaction temperature,reaction time,Tris weight and the interactions of two factors on QY were investigated.The morphology,surface functional groups and fluorescence characteristics of the N-CQDs were explored by HRTEM,FT-IR,UV-Vis and other analytical methods.The results revealed that the obtained optimum synthesized conditions for the parameters i.e.reaction temperature,reaction time,and Tris weight were 160℃,5 h and 0.6 g respectively,with QY up to 73.51%.The diameter distribution of N-CQDs was around 5~25 nm,emitted blue-violet fluorescence under 365 nm UV light.The surface of N-CQDs contained a large number of nitrogen-containing and oxygen-containing functional groups(such as—NH,C=O,C-O,etc.).

关 键 词：掺氮碳量子点 高荧光量子产率 制备工艺 

分 类 号：TQ127.1[化学工程—无机化工]