4.7 Article

Design and fabrication of dual functional sulfur nanodots with reducibility and fluorescence properties for sensitive and selective analysis of metal ions in environmental water samples

期刊

SENSORS AND ACTUATORS B-CHEMICAL
卷 374, 期 -, 页码 -

出版社

ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2022.132817

关键词

Reducibility; Fluorescence; Optical probes; Reduced -state sulfur nanodots; Metal ions

向作者/读者索取更多资源

In this study, reduced-state sulfur nanodots (r-SDs) with reducibility, satisfactory fluorescence properties, and high stability were synthesized for the sensitive and selective analysis of metal ions. The reduction property of SDs was discovered for the first time, and the detailed reduction mechanisms were investigated. The r-SDs showed in situ reduction of Au3+ to Au nanoparticles and also reduction of Fe3+ and Cu2+ to Fe2+ and Cu+, respectively. Hg2+ was selectively analyzed through dual-mode fluorescence and colorimetric probes, while Fe3+ and Cu2+ were quantitatively analyzed using specific recognition after reduction by r-SDs. The linear ranges and limits of detection for the different analytes were determined. Good recoveries were obtained for practical applications in environmental water samples.
Reduced-state sulfur nanodots (r-SDs) with reducibility, satisfactory fluorescence properties and high stability were synthesized for the sensitive and selective analysis of metal ions, including Hg2+, Fe3+ and Cu2+. The reduction property of SDs was discovered for the first time, and the detailed reduction mechanisms of r-SDs were investigated. The reducibility of r-SDs exhibits the in situ reduction of Au3+ to Au nanoparticles (AuNPs/r-SDs) and also the reduction of Fe3+ and Cu2+ to Fe2+ and Cu+, respectively. On the one hand, selective analysis of Hg2+ can be achieved through dual-mode fluorescence and colorimetric probes of thymine-modified AuNPs/r-SDs (T-AuNPs/r-SDs) on account of the special bonding of T-Hg2+-T, as verified by density functional theory simulations. Furthermore, the fluorescent probes r-SDs-1, 10-Phenanthroline (r-SDs-Phen) and r-SDs-neo-cuproine (r-SDs-Nc) were applied to the quantitative analysis of Fe3+ and Cu2+ by the specific recognition of Phen-Fe2+ and Nc-Cu+ after the reduction of Fe3+ and Cu2+ to Fe2+ and Cu+ by r-SDs. The linear ranges of T-AuNPs/r-SDs, r-SDs-Phen, and r-SDs-Nc for Hg2+, Fe3+, and Cu2+ were 5.0-70.0 nmol/L (fluorescence), 10.0-500.0 nmol/L (colorimetric), 1.0-100.0 mu mol/L, and 1.0-50.0 mu mol/L, with limits of detection of 0.82 nmol/L, 4.05 nmol/L, 0.36 mu mol/L, and 0.56 mu mol/L, respectively. In addition, good recoveries for practical applications in environmental water samples can be obtained to confirm the analysis accuracy. The successful results provided a new idea for the application of nanomaterials with reducibility and fluorescence properties in analytical chemistry.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据