Molecularly imprinted mesoporous silica incorporating C3N4 dots and CdTe quantum dots as ratiometric fluorescent probe for determination of Malachite Green

被引：24

作者：

Shi, Han ^{[1
]}

Zhang, Liang ^{[1
]}

Yu, Guoliang ^{[2
]}

Liu, Yuting ^{[1
]}

Chen, Ligang ^{[1
]}

机构：

[1] Northeast Forestry Univ, Coll Sci, Dept Chem, 26 Hexing Rd, Harbin 150040, Heilongjiang, Peoples R China

[2] Fiber Inspect Bur Heilongjiang Prov, 100 Zhujiang St, Harbin 150030, Heilongjiang, Peoples R China

来源：

MICROCHIMICA ACTA | 2019年 / 186卷 / 08期

基金：

黑龙江省自然科学基金;

关键词：

Dualemission; Mesoporous structure; Molecularly imprinted polymers; Nanoprobe; Fish farming water; Fluorometry; SOLID-PHASE EXTRACTION; ONE-POT SYNTHESIS; LEUCOMALACHITE GREEN; WATER SAMPLES; FISH WATER; NANOPARTICLES; SENSOR; RESIDUES; POLYMER;

D O I：

10.1007/s00604-019-3670-8

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A new dual-emission ratiometric fluorescent probe was synthesized and successfully used for the determination of Malachite Green (MG)in fish farming water. The ratiometric fluorescent probe was successfully composited by sol-gel method using C3N4 and CdTe quantum dots as fluorescent materials combined with mesoporous molecularly imprinted polymers. MG quenches the red fluorescence of the CdTe QDs (with excitation/emission wavelengths at 350/680nm) while the blue fluorescence of C3N4 (with excitation/emission wavelengths at 350/458nm) remains unchanged. The change of fluorescence color and fluorescence intensity ratio can be successfully used for quantification of malachite green. In addition, the mesoporous structure has a large surface and good adsorption capacity for malachite green. The normalized intensity of fluorescence increases linearly in the 50-1000ngmL(-1) MG concentration range, and the detection limit is 10ngmL(-1). The imprinting factor is 3.2. The nanoprobe was applied to the determination of MG in fish farming water samples. Recoveries and relative standard deviations were 92.5-97.8% and 2.5-6.2%, respectively.

引用

页数：10

共 32 条

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