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Label-free colorimetric sensing of cobalt(II) based on inducing aggregation of thiosulfate stabilized gold nanoparticles in the presence of ethylenediamine

文献类型：期刊论文

作者Zhang, Zhiyang1,3; Zhang, Jun2; Lou, Tingting1,3; Pan, Dawei1; Chen, Lingxin1; Qu, Chengli1; Chen, Zhaopeng1
刊名ANALYST
出版日期2012
卷号137期号:2页码:400-405
关键词Adsorptive Stripping Voltammetry Bismuth Film Electrode Injection Flame Aas Icp-ms Spectrophotometry Nickel Preconcentration Copper Trace Ions
ISSN号0003-2654
产权排序[Zhang, Zhiyang; Lou, Tingting; Pan, Dawei; Chen, Lingxin; Qu, Chengli; Chen, Zhaopeng] Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc, Yantai 264003, Peoples R China; [Zhang, Jun] Hainan Med Univ, Sch Trop & Lab Med, Haikou 571101, Peoples R China; [Zhang, Zhiyang; Lou, Tingting] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
通讯作者Chen, ZP (reprint author), Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc, Yantai 264003, Peoples R China. zhpchen@yic.ac.cn
文献子类Article
英文摘要As a sensitive and selective analytical technique, gold nanoparticles-based colorimetric sensing was characterized by its simplicity and cost-effectiveness. Specific methods have been extensively developed for different targets in diverse samples. In this study, a label-free method for sensing Co(2+) in aqueous solutions was described. The target was achieved by the induced aggregation of thiosulfate (S(2)O(3)(2-)) stabilized gold nanoparticles (AuNPs) in the presence of ethylenediamine (en). Co(2+) first reacted with en and formed complexes of Co(en)(3)(2+) in aqueous solutions, which was followed by the oxidation of Co(en)(3)(2+) to Co(en)(3)(3+) by dissolved oxygen. Co(en)(3)(3+) then attacked S(2)O(3)(2-) ligands adsorbed on the AuNPs' surfaces, forming positively charged (en)(2)CoS(2)O(3)(+) on the AuNPs' surfaces, which reduced the surface charges of AuNPs and induced the aggregation of AuNPs. The process was accompanied by a red-shift in the adsorption spectrum and a visible colour change from wine red to blue. Potential effects of relevant experimental conditions, including pH, concentrations of S(2)O(3)(2-) and en, and incubation time were evaluated for optimization of the method. The proposed method is sensitive (LOD = 0.0 4 mu M or 2.36 ppb) and selective (by at least 100-fold over other metal ions except for Cu(2+)) toward Co(2+) with a linear range from 0.1 to 0.7 mu M. The cost-effective method allows rapid and simple determination of the concentrations of Co(2+) ions in drinking water.; As a sensitive and selective analytical technique, gold nanoparticles-based colorimetric sensing was characterized by its simplicity and cost-effectiveness. Specific methods have been extensively developed for different targets in diverse samples. In this study, a label-free method for sensing Co(2+) in aqueous solutions was described. The target was achieved by the induced aggregation of thiosulfate (S(2)O(3)(2-)) stabilized gold nanoparticles (AuNPs) in the presence of ethylenediamine (en). Co(2+) first reacted with en and formed complexes of Co(en)(3)(2+) in aqueous solutions, which was followed by the oxidation of Co(en)(3)(2+) to Co(en)(3)(3+) by dissolved oxygen. Co(en)(3)(3+) then attacked S(2)O(3)(2-) ligands adsorbed on the AuNPs' surfaces, forming positively charged (en)(2)CoS(2)O(3)(+) on the AuNPs' surfaces, which reduced the surface charges of AuNPs and induced the aggregation of AuNPs. The process was accompanied by a red-shift in the adsorption spectrum and a visible colour change from wine red to blue. Potential effects of relevant experimental conditions, including pH, concentrations of S(2)O(3)(2-) and en, and incubation time were evaluated for optimization of the method. The proposed method is sensitive (LOD = 0.0 4 mu M or 2.36 ppb) and selective (by at least 100-fold over other metal ions except for Cu(2+)) toward Co(2+) with a linear range from 0.1 to 0.7 mu M. The cost-effective method allows rapid and simple determination of the concentrations of Co(2+) ions in drinking water.
学科主题Chemistry
URL标识查看原文
WOS关键词ADSORPTIVE STRIPPING VOLTAMMETRY ; BISMUTH FILM ELECTRODE ; INJECTION FLAME AAS ; ICP-MS ; SPECTROPHOTOMETRY ; NICKEL ; PRECONCENTRATION ; COPPER ; TRACE ; IONS
WOS研究方向Chemistry
语种英语
WOS记录号WOS:000297998000017
资助机构NSFC[20975089, 21007087]; Department of Science and Technology of Shandong Province[BS2009DX006, 2008GG20005005]; Department of Science and Technology of Yantai City[2007156]; CAS[KZCX2-YW-JS208]
公开日期2012-06-13
源URL[http://ir.yic.ac.cn/handle/133337/5512]  
专题烟台海岸带研究所_山东省海岸带环境工程技术研究中心
作者单位1.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc, Yantai 264003, Peoples R China
2.Hainan Med Univ, Sch Trop & Lab Med, Haikou 571101, Peoples R China
3.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Zhiyang,Zhang, Jun,Lou, Tingting,et al. Label-free colorimetric sensing of cobalt(II) based on inducing aggregation of thiosulfate stabilized gold nanoparticles in the presence of ethylenediamine[J]. ANALYST,2012,137(2):400-405.
APA Zhang, Zhiyang.,Zhang, Jun.,Lou, Tingting.,Pan, Dawei.,Chen, Lingxin.,...&Chen, Zhaopeng.(2012).Label-free colorimetric sensing of cobalt(II) based on inducing aggregation of thiosulfate stabilized gold nanoparticles in the presence of ethylenediamine.ANALYST,137(2),400-405.
MLA Zhang, Zhiyang,et al."Label-free colorimetric sensing of cobalt(II) based on inducing aggregation of thiosulfate stabilized gold nanoparticles in the presence of ethylenediamine".ANALYST 137.2(2012):400-405.

入库方式： OAI收割

来源：烟台海岸带研究所

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