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Mercaptotriazole@gold-silver bimetallic nanocluster for mercury ion detection and preparation method and application thereof

A technology of mercaptotriazole and bimetallic nanometers, applied in the field of nanomaterials, can solve the problems of few gold nanoclusters and no application of Hg2+ detection, and achieve the effects of enhanced fluorescence intensity, good recovery rate and precision

Active Publication Date: 2020-11-20
CHINA WEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] To sum up, there are few applications of gold nanoclusters with TRO as a ligand in fluorescence, and there is no research on Hg nanoclusters. 2+ detection application

Method used

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  • Mercaptotriazole@gold-silver bimetallic nanocluster for mercury ion detection and preparation method and application thereof
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  • Mercaptotriazole@gold-silver bimetallic nanocluster for mercury ion detection and preparation method and application thereof

Examples

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Embodiment 1

[0041] A preferred embodiment of the present invention provides a preparation method of mercaptotriazole@gold-silver bimetallic nanoclusters for mercury ion detection, the specific steps are as follows:

[0042] After heating 3-mercapto-1,2,4-triazole to 70 °C, add AgNO 3 with HAuCl 4 .3H 2 O, react for 12 hours; centrifuge, collect the white precipitate, add water and ultrasonically disperse, and centrifuge again, this operation is about 4-5 times, freeze-dry the precipitate, and store it in the refrigerator at 4°C; among them, 3-mercapto-1,2,4- The molar ratio of triazole, Ag and Au was 4:0.2:1 and the concentration of 3-mercapto-1,2,4-triazole was 2.86 mM.

Embodiment 2

[0044] Only the molar ratio of 3-mercapto-1,2,4-triazole, Ag and Au is 2:0.05:1, and the others are the same as in Example 1.

Embodiment 3

[0046] Only the molar ratio of 3-mercapto-1,2,4-triazole, Ag and Au is 2:0.1:1, and the others are the same as in Example 1.

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Abstract

The invention discloses a mercaptotriazole@gold-silver double-metal nanocluster for mercury ion detection and a preparation method and application thereof and belongs to the technical field of nano materials. The preparation method aims to synthesize the Ag-doped fluorescent bimetallic nanocluster TRO@Au / Ag NCs by taking 3-mercapto-1, 2, 4-triazole as a ligand and chloroauric acid and silver nitrate as bimetallic sources and utilizing a simple one-step method. Compared with a single-metal cluster, the fluorescence intensity of the double-metal cluster is remarkably enhanced. After Ag doping, the electron structure of the cluster is strongly interfered. The fluorescence of the cluster can be quenched by Hg <2+>. Further research finds that the concentration of Hg <2+> is 0.5-80 [mu]M, the linearity is good, and the recovery rate and the precision are good when Hg <2+> is applied to detection of a water sample.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, and in particular relates to a mercaptotriazole@gold-silver bimetallic nanocluster for mercury ion detection and its preparation method and application. Background technique [0002] Mercury is a highly toxic and widely distributed heavy metal pollutant. Mercury ion (Hg 2+ ) is the most stable form of inorganic mercury, it is not only distributed in polluted air, water and soil, but also can be enriched in plants, aquatic animals and other organisms. Microbial biomethylation can directly absorb Hg from water or soil, study finds 2+ , and Hg 2+ It is converted into methylmercury, and then accumulates in the human body through drinking water and the food chain. If it accumulates to a certain extent, it may cause brain damage, kidney failure, DNA damage, and immune system homeostasis damage to the human body. Even at low concentrations, Hg 2+ It also poses a serious threat to human health...

Claims

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Application Information

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IPC IPC(8): C07D249/12C09K11/06G01N21/64
CPCC07D249/12C09K11/06G01N21/643C09K2211/188G01N2021/6432
Inventor 杨秀培杨正丽问少华张茂雪唐凤琳
Owner CHINA WEST NORMAL UNIVERSITY
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