氮磷共掺杂碳量子点高灵敏响应2,4-二硝基酚的研究  

Sensitive response of nitrogen and phosphorus co-doped carbon quantum dots to 2,4-dinitrophenol

作　　者：李影影 时惠敏 冯素玲[1] LI Ying-ying;SHI Hui-min;FENG Su-ling(School of Chemistry and Chemical Engineering,Henan Normal University,Xinxiang 453007,China;Department of Basic Medicine,Zhengzhou Shuqing Medical College,Zhengzhou 450064,China)

机构地区：[1]河南师范大学化学化工学院,河南新乡453007 [2]郑州澍青医学高等专科学校基础医学部,河南郑州450064

出　　处：《化学研究与应用》2021年第12期2399-2404,共6页Chemical Research and Application

基　　金：河南省高等学校青年骨干教师培养计划项目(2017GGJS301)资助;国家自然科学基金项目(21976052)资助。

摘　　要：运用六偏磷酸钠为钝化剂、胰酪蛋白胨为碳源,通过水热法合成了一种氮磷共掺杂碳量子点。该碳量子点的量子产率为25.4%,在高离子强度和紫外光环境中有良好的稳定性,并且碳量子点的发光强度与pH(2~12)具有线性相关性。合成的碳量子点能够作为荧光探针高灵敏响应2,4-二硝基酚(2,4-DNP)。发光强度与2,4-DNP的浓度(0.01~2.5μg·mL^(-1))呈现线性相关,检出限低至3.6μg·L^(-1)。作为荧光探针应用于河水、湖水和自来水中2,4-DNP的测定,回收率为93.8%~103%,相对标准偏差RSD<0.7%。Nitrogen and phosphorus co-doped carbon quantum dots(N,P-CQDs)were synthesized by hydrothermal method using tryptone and sodium polyphosphate.The as-prepared CQDs have a high quantum yield of 25.4%,and good stability in high ionic strength and ultraviolet light environment.The luminescence intensity of the carbon quantum dots shows a linear correlation with pH(2~12).In addition, the synthesized carbon quantum dots can be used as fluorescent probes for detecting 2,4-dinitrophenol.The fluorescence intensity of the probes showed a linear response to 2,4-DNP in the concentration range of 0.01~2.5 μg·mL^(-1)with a low detection limit of 3.6 μg·L^(-1).The probes were used to determine 2,4-dinitrophenol in river water, lake water and tap water.The recoveries were from 93.8%to 103%with RSD<0.7%.

关 键 词：氮磷共掺杂碳量子点 2 4-二硝基酚 荧光探针 

分 类 号：O657.3[理学—分析化学]