陈皮提取物绿色合成纳米银无标记比色法检测汞离子  

Label-Free Colorimetric Detection of Mercury Ion by Green Synthesized Ag NPs Using Pericarpium Citri Reticulatae Extract

作　　者：杨博玥 张卫[2,3] 孙奕 董晨[4] 符伟杰 诸杰 YANG Boyue;ZHANG Wei;SUN Yi;DONG Chen;FU Weijie;ZHU Jie(Nanjing Hydraulic Research Institute,National Energy Administration,Ministry of Water Resources,Ministry of Transport,Nanjing 210029,China;Nanjing Automation Institute of Water Conservancy and Hydrology,Ministry of Water Resources,Nanjing 210012,China;Hydrology and Water Resources Monitoring Engineering Technology Research Center,Ministry of Water Resources,Nanjing 210012,China;School of Materials Science and Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210003,China)

机构地区：[1]水利部交通运输部国家能源局南京水利科学研究院,江苏南京210029 [2]水利部南京水利水文自动化研究所,江苏南京210012 [3]水利部水文水资源监控工程技术研究中心,江苏南京210012 [4]南京邮电大学材料科学与工程学院,江苏南京210003

出　　处：《化学与生物工程》2020年第8期51-56,共6页Chemistry & Bioengineering

基　　金：国家重点研发计划项目(2019YFB2102000,2017YFC0405700);中央级公益性科研院所基本科研业务费专项资金项目(Y518011,Y518012,Y919009)。

摘　　要：以陈皮提取物为还原剂和表面保护剂,一步法合成纳米银(Ag NPs)@陈皮,采用紫外可见吸收光谱、透射电镜及X-射线衍射等对其进行表征,并将Ag NPs@陈皮作为汞离子(Hg^2+)传感探针,采用比色法检测水体中Hg^2+。结果表明,Ag NPs@陈皮具有面心立方结构,呈分散分布,形状近似球形,粒径为(39.35±0.83)nm。Ag NPs@陈皮可特异性识别Hg^2+,Hg^2+浓度在0.010~20μmol·L^-1范围内,Ag NPs@陈皮在408 nm处的吸光度下降百分比(Ic)与(lgcHg^2+)5/2呈良好的线性关系,检出限为8.93 nmol·L^-1(S/N=3)。河水水样Hg^2+加标回收率在101.8%~105.9%之间(n=3),RSD小于7%。该方法是一种快速、便捷、灵敏的Hg^2+比色检测方法,具有实际应用潜力。Using Pericarpium Citri Reticulatae(PCR)extract as a reducing agent and surface protection agent,we synthesized Ag NPs@PCR by a one-step method,and characterized the Ag NPs@PCR by UV-Vis absorption spectrum,transmission electron microscopy,and X-ray diffraction.Moreover,we used the Ag NPs@PCR as mercury ion(Hg^2+)sensing probes to detect Hg^2+in water by a colorimetric method.The results show that the Ag NPs@PCR has a face-centered cubic structure and is dispersively distributed,which has a nearly spherical shape with the particle size of(39.35±0.83)nm.Ag NPs@PCR can specifically identify Hg^2+,and the percentage decrease of the absorbance(Ic)of Ag NPs@PCR at 408 nm shows a good linear relationship with(lgcHg^2+)5/2 in the range of 0.010-20μmol·L^-1,and the detection limit is 8.93 nmol·L^-1(S/N=3).The adding standard recovery of Hg^2+in water sample is 101.8%-105.9%(n=3),and the RSD is less than 7%.This method is a fast,convenient,and sensitive colorimetric method for the detection of Hg^2+concentration,which has practical application potential.

关 键 词：绿色合成 纳米银 陈皮提取物 汞离子检测 比色法 

分 类 号：O657.3[理学—分析化学] O614.122[理学—化学]