Room-Temperature Phosphorescence Detection of Silver Ions Based on Glutathione Capped Mn-Doped ZnS Quantum Dots

被引：5

作者：

Lu, Li-Qiang ^{[1
]}

Deng, Pan ^{[1
]}

Ma, Yan-Hong ^{[1
]}

Wang, Lian-Lian ^{[1
]}

Peng, Fan ^{[1
]}

Tian, Xi-Ke ^{[1
]}

机构：

[1] China Univ Geosci, Fac Mat Sci & Chem, Wuhan 430074, Hubei, Peoples R China

来源：

JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY | 2017年 / 17卷 / 09期

基金：

中国国家自然科学基金;

关键词：

Phosphorescence; Mn-Doped ZnS QDs; Silver Ions; BIOLOGICAL-FLUIDS; FLUORESCENCE SENSOR; L-CYSTEINE; QDS; PRECONCENTRATION; DISCRIMINATION; NANOPARTICLES; SPECTROMETRY; TOXICITY; MERCURY;

D O I：

10.1166/jnn.2017.14457

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A sensitive and selective room-temperature phosphorescence (RTP) assay of silver ions (Ag+) based on glutathione modified manganese-doped zinc sulfide quantum dots (GSH-MnZnS QDs) was developed. By using safe and low-cost materials, GSH-MnZnS QDs were easily synthesized in aqueous media, which emitted intense RTP even though the solution was not deoxygenated. However, the RTP of GSH-MnZnS QDs was strongly quenched by Ag+ due to the formation of Ag-GSH complex and the electron transfer from excited GSH-MnZnS QDs to Ag+. The observed results show that GSH-MnZnS QDs offer high sensitivity with a detection limit down to 36 nM and high selectivity over other metal ions in the presence of specific masking agents for Ag+ determination. The developed method was finally applied to the detection of Ag+ in water samples, and the spike-recoveries fell in the range of 95-106%.

引用

页码：6759 / 6764

页数：6

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