基于Ti_(3)C_(2)量子点@罗丹明B荧光探针对Cr(Ⅵ)的传感检测研究  

An novel fluorescent probe for detection of Cr(Ⅵ)based on Ti_(3)C_(2) quantum dots@Rhodamine B

作　　者：杨新杰 尹学虎 张慧莲 李尹飞 庞鹏飞[1] 王红斌[1] 杨文荣[2] 张艳丽[1] YANG Xin-jie;YIN Xue-hu;ZHANG Hui-lian;LI Yin-fei;PANG Peng-fei;WANG Hong-bin;YANG Wen-rong;ZHANG Yan-li(National and Local Joint Engineering Research Center for Green Preparation Technology of Biobased Materials,Yunnan Minzu University,Kunming 650500,Yunnan,China;School of Life and Environmental Sciences,Deakin University,Geelong 3217,Australia)

机构地区：[1]云南民族大学生物基材料绿色制备技术国家地方联合工程研究中心,云南昆明650500 [2]迪肯大学生命与环境科学学院,澳大利亚吉朗3217

出　　处：《云南大学学报（自然科学版）》2023年第5期1105-1112,共8页Journal of Yunnan University(Natural Sciences Edition)

基　　金：国家自然科学基金(21565031;21665027);云南省科技厅应用基础研究项目(202001AT070012);云南民族大学大学生创新创业训练计划.

摘　　要：采用刻蚀和水热法合成了碳化钛量子点(Ti_(3)C_(2) QDs),该量子点与罗丹明B(RhB)之间由于静电作用产生荧光共振能量转移(FRET)形成荧光探针,Cr(Ⅵ)的内滤效应(IFE)导致探针荧光猝灭,构建了一种“开-关”型荧光探针用于Cr(Ⅵ)的传感检测.在优化实验条件下,该荧光探针对Cr(Ⅵ)的线性响应范围为0.05-500μmol/L,检出限为0.014μmol/L (S/N=3).构建的荧光探针具有制备简单、稳定性和选择性好,对Cr(Ⅵ)的检测灵敏度高等特点,对环境水样中Cr(Ⅵ)测定的回收率为94.3%-104.0%.研究为水体中重金属离子Cr(Ⅵ)的快速和准确测定提供了一种新方法.Titanium carbide quantum dots(Ti_(3)C_(2) QDs)were synthesized by etching and hydrothermal method.The fluorescent probe was formed by fluorescence resonance energy transfer(FRET)from Ti_(3)C_(2) quantum dots to rhodamine B(RhB)due to electrostatic interaction.The fluorescence intensity of the proposed probe was quenched caused by the internal filtering effect(IFE)of hexavalent chromium ion Cr(Ⅵ).An"on-off"fluorescent probe was constructed for the sensing detection of Cr(Ⅵ).Under the optimized experimental conditions,fluorescent intensity of the probe was proportional to the concentration of Cr(Ⅵ)in the range of 0.05-500μmol/L with a detection limit of 0.014μmol/L(S/N=3).The constructed fluorescent probe has the characteristics of simple preparation,good stability and selectivity,and high sensitivity for Cr(Ⅵ)detection.The recovery rate for the determination of Cr(Ⅵ)in environmental water samples is 94.3%-104.0%.Therefore,it provides a new method for the rapid and accurate determination of heavy metal ions Cr(Ⅵ)in water.

关 键 词：六价铬离子 Ti_(3)C_(2)量子点 罗丹明B 内滤效应 荧光探针 

分 类 号：O657.3[理学—分析化学]