Understanding the Selective Detection of Fe3+ Based on Graphene Quantum Dots as Fluorescent Probes: The K-sp of a Metal Hydroxide-Assisted Mechanism
文献类型：期刊论文
| 作者 | Zhu, Xiaowen1; Zhang, Zhen2,3; Xue, Zhenjie2,3; Huang, Chuanhui2,3; Shan, Ye2,3; Liu, Cong2,3; Qin, Xiaoyun2,3; Yang, Wensheng1; Chen, Xu1; Wang, Tie2,3 |
| 刊名 | ANALYTICAL CHEMISTRY
 |
| 出版日期 | 2017-11-21 |
| 卷号 | 89期号:22页码:12054-12058 |
| 英文摘要 | Graphene quantum dots (GQDs) have been widely used as fluorescence probes to detect metal ions with satisfactory selectivity. However, the diverse chemical structures of GQDs lead to selectivity for multiple metal ions, and this can lead to trouble in the interpretation of selectivity due to the lack of an in depth and systematic analysis. Herein, bare GQDs were synthesized by oxidizing carbon black with nitric acid and used as fluorescent probes to detect metal ions. We found that the specific ability of GQDs to recognize ferric ions relates to the acidity of the medium. Specifically, we demonstrated that the coordination between GQDs and Fe2+ is regulated by the pH of the aqueous GQDs solution. Dissociative Fe3+ can coordinate with the hydroxyl groups on the surface of the GQDs to form aggregates (such as iron hydroxide), which induces fluorescence quenching. A satisfactory selectivity for Fe ions was under relatively acidic conditions; this is because of the extremely small K-sp, of ferric hydroxide compared to those of other common metal hydroxides. To directly survey the key parameter for Fe3+ ion was achieved specificity, we performed the detection experiment in an environment free of interference from the buffer solution, noninherent groups, and other complex factors. This study will help researchers understand the selectivity mechanisms of GQDs as fluorescence probes for metal ions, which could guide the design of other GQD-based sensor platforms. |
| 语种 | 英语 |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/38328]  |
| 专题 | 化学研究所_活体分析化学实验室 |
| 作者单位 | 1.Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Beijing Natl Lab Mol Sci, Inst Chem, Key Lab Analyt Chem Living Biosyst, Beijing 100190, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhu, Xiaowen,Zhang, Zhen,Xue, Zhenjie,et al. Understanding the Selective Detection of Fe3+ Based on Graphene Quantum Dots as Fluorescent Probes: The K-sp of a Metal Hydroxide-Assisted Mechanism[J]. ANALYTICAL CHEMISTRY,2017,89(22):12054-12058. |
| APA | Zhu, Xiaowen.,Zhang, Zhen.,Xue, Zhenjie.,Huang, Chuanhui.,Shan, Ye.,...&Wang, Tie.(2017).Understanding the Selective Detection of Fe3+ Based on Graphene Quantum Dots as Fluorescent Probes: The K-sp of a Metal Hydroxide-Assisted Mechanism.ANALYTICAL CHEMISTRY,89(22),12054-12058. |
| MLA | Zhu, Xiaowen,et al."Understanding the Selective Detection of Fe3+ Based on Graphene Quantum Dots as Fluorescent Probes: The K-sp of a Metal Hydroxide-Assisted Mechanism".ANALYTICAL CHEMISTRY 89.22(2017):12054-12058. |
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来源：化学研究所
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