期刊
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
卷 634, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.colsurfa.2021.128023
关键词
Fluorescent sensor; Si; CDs; Hg2+; The test paper
资金
- National Natural Science Foundation of China [21665024]
- Northwest Normal University Young Teachers Research Capacity Promotion Plan [NWNU-LKQN-18-23]
- Key Lab of Polymer Materials of Gansu Province
A blue fluorescent Si/CDs material was synthesized successfully as a sensitive fluorescent sensor for detecting Hg2+ ions in water, showing excellent optical properties and stability. The material can emit bright blue fluorescence under UV light, with a linear decrease in emission intensity correlating with increasing Hg2+ concentration, and a detection limit of 26.7 nM.
A blue fluorescent Si/CDs is successfully synthesized via a conventional solvothermal method, which can serve as a sensitive fluorescent sensor to detect Hg2+ ions in water. The synthesized Si/CDs material exhibits excellent optical properties, high chemical and structural stability in an aqueous solution. Under natural light, the mixture is a colorless suspension while under ultraviolet light, it can emit bright blue fluorescence and the maximum excitation and emission wavelengths are 377 and 464 nm, respectively. Particularly, Hg2+ can lead to nearly complete fluorescence quenching of the material suspension and the emission intensity of the constructed fluorescent sensing system linearly decreases with increasing Hg2+ concentration in the range of 0-200 mu M with a detection limit of 26.7 nM (S/N = 3). The proposed method has been successfully applied in detection of Hg2+ content in environmental and drinking water samples. In addition, the test paper strips based on fluorescent Si/ CDs are also prepared by an immersion method for rapid and quantitative detection of Hg2+ in water environment through a visual mode.
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。
推荐
暂无数据