| Label-free colorimetric sensing of cobalt(II) based on inducing aggregation of thiosulfate stabilized gold nanoparticles in the presence of ethylenediamine | |
Zhang, Zhiyang1,3 ; Zhang, Jun2; Lou, Tingting1,3; Pan, Dawei1; Chen, Lingxin1; Qu, Chengli1; Chen, Zhaopeng1
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| 发表期刊 | ANALYST
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| ISSN | 0003-2654 |
| 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 |
| 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 |
| 作者部门 | 环境化学实验室 |
| 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. |
| 文章类型 | Article |
| 收录类别 | SCI |
| 语种 | 英语 |
| 关键词[WOS] | ADSORPTIVE STRIPPING VOLTAMMETRY ; BISMUTH FILM ELECTRODE ; INJECTION FLAME AAS ; ICP-MS ; SPECTROPHOTOMETRY ; NICKEL ; PRECONCENTRATION ; COPPER ; TRACE ; IONS |
| 研究领域[WOS] | Chemistry |
| WOS记录号 | WOS:000297998000017 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.yic.ac.cn/handle/133337/5511 |
| 专题 | 中国科学院海岸带环境过程与生态修复重点实验室_海岸带环境工程技术研究与发展中心 |
| 通讯作者 | Chen, Zhaopeng |
| 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. |
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