Silver-doped CdS quantum dots incorporated into chitosan-coated cellulose as a colorimetric paper test stripe for mercury

被引：23

作者：

Butwong, Nutthaya ^{[1
]}

Kunthadong, Pimpanitpa ^{[1
]}

Soisungnoen, Phimpha ^{[1
]}

Chotichayapong, Chatrachatchaya ^{[1
]}

Srijaranai, Supalax ^{[2
,3
]}

Luong, John H. T. ^{[4
,5
]}

机构：

[1] Rajamangala Univ Technol Isan, Fac Sci & Liberal Arts, Appl Chem Dept, 744 Suranarai Rd, Nakhon Ratchasima 30000, Thailand

[2] Khon Kaen Univ, Fac Sci, Dept Chem, Mat Chem Res Unit, Khon Kaen 40002, Thailand

[3] Khon Kaen Univ, Fac Sci, Ctr Excellence Innovat Chem, Khon Kaen 40002, Thailand

[4] Univ Coll Cork, Sch Chem, ISSC, Innovat Chromatog Grp, Cork, Ireland

[5] Univ Coll Cork, ABCRF, Cork, Ireland

来源：

MICROCHIMICA ACTA | 2018年 / 185卷 / 02期

关键词：

Ag-doped CdS quantumdots; Mercaptoacetic acid; Visual detection; ENHANCED PHOTOCATALYTIC ACTIVITY; GOLD NANOPARTICLES; IONS; SULFIDE; METAL; ASSAY; SEMICONDUCTOR; AGGREGATION; STABILITY; LAYER;

D O I：

10.1007/s00604-018-2671-3

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Silver-doped CdS quantum dots capped with mercaptoacetic acid were incorporated into a chitosan-coated filter paper to fabricate a colorimetric test stripe for mercury. Chitosan assisted in the stabilization of CdSAg QDs on cellulose and enhanced the analyte diffusion in the test stripe. Hg(II) ions were captured by mercaptoacetic acid on CdSAg, resulting in a visualized color change from yellow to deep brown. For enhanced sensitivity and quantitation with good reproducibility, the color intensity was recorded, transmitted to a smartphone camera and computed by the ImageJ software to provide a digital readout. The assay was rapid, simple, and selective for mercury as several potential interfering species provoked no signal response. The applicability of the sensing approach was demonstrated for the analysis of spiked Hg(II) ions in cosmetic cream with a detection limit of 124 mu M.

引用

页数：9

共 46 条

[1] Simple and rapid colorimetric detection of Hg(II) by a paper-based device using silver nanoplates [J].