摘要
三硝基苯酚(PA)是废水中酚类有机化合物的重要成分,鉴于其对人体及环境的危害,实现PA简便、准确的检测意义重大。本文以L-组氨酸为保护剂,抗坏血酸为还原剂,通过一步法在室温下合成了铜纳米团簇(Cu NCs)。透射电子显微镜(TEM)、X射线光电子能谱(XPS)、紫外可见光谱(UV-vis)和傅里叶红外(FT-IR)等手段被用于研究样品的结构与性质。结果显示,该铜纳米团簇的最大激发和发射波长分别为382和492 nm,所得样品分散性良好且尺寸均匀,具有较高的稳定性。水溶性的Cu NCs荧光探针对PA的检测具有高选择性,内滤效应(IFE)的存在导致了PA对荧光探针的有效淬灭。在0~80μM浓度范围内F 0/F与PA的浓度呈现出良好的线性关系,其最低检出限为0.25μM(S/N=3)。另外,Cu NCs被成功用于实际水样中PA的检测,说明此种荧光探针有很好的实用性。
Trinitrophenol(PA)is an important component of phenolic organic compounds in wastewater.In view of their damages to human and environment,it is significant to realize simple and accurate detection of PA.In this work,the copper nanoclusters(Cu NCs)were synthesized through one-pot method at room temperature by using L-Histidine as stabilizer and the ascorbic acid as reducing agent.The transmission electron microscopy(TEM),X-ray photoelectron spectroscopy(XPS),UV-visible absorption spectroscopy(UV-vis),Fourier transform infrared spectroscopy(FT-IR)and others techniques were adopted to investigate the structures and properties.The results show that Cu NCs have a strong symmetric emission at 492 nm with a maximum excitation at 382 nm,furthermore,the samples are well-dispersed spherical particles with uniform size and high stability.The soluble Cu NCs fluorescence probe showed high selectivity for detecting PA and the inner filter effect(IFE)resulted in the effective fluorescence quenching of Cu NCs.The F 0/F values displayed good linear relationship with concentrations of PA from 0 to 80μM and the detection limit was 0.25μM(S/N=3).Moreover,the probe was successfully applied to examine the PA in real water samples which stated the superior practicability of Cu NCs.
作者
张申
蔡志峰
郭玉玉
ZHANG Shen;CAI Zhi-feng;GUO Yu-yu(Department of Chemistry,Taiyuan Normal University,Jinzhong 030619,China;College of Arts,Taiyuan University of Technology,Jinzhong 030024,China)
出处
《化学研究与应用》
CAS
CSCD
北大核心
2021年第2期276-283,共8页
Chemical Research and Application
基金
山西省高等学校大学生创新创业训练计划项目(2020486)资助
山西省应用基础研究基金面上自然基金项目(201801D121257)资助。
关键词
L-组氨酸
抗坏血酸
铜纳米团簇
三硝基苯酚
荧光淬灭
L-Histidine
ascorbic acid
copper nanoclusters
trinitrophenol
fluorescence quenching
