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Sensor for mercury ion detection and preparation method and application thereof

A sensor and mercury ion technology, applied in the direction of color/spectral characteristic measurement, etc., can solve the problems of mercury ion concentration detection or expensive raw materials, easy to be interfered by other metal particles, easy to be interfered by external conditions, etc., to achieve excellent sensitivity, anti-corrosion The effect of strong interference ability and high sensitivity

Active Publication Date: 2015-12-23
ANHUI NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] With regard to the above-mentioned prior art, the object of the present invention is to overcome the detection of mercury ion concentration in the prior art or the problems of expensive raw materials, or being easily disturbed by external conditions, or easily disturbed by other metal particles, and the detection takes a long time, etc., thereby Provided is a sensor for mercury ion detection with excellent sensitivity, strong anti-interference ability and good stability, its preparation method and application

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  • Sensor for mercury ion detection and preparation method and application thereof
  • Sensor for mercury ion detection and preparation method and application thereof
  • Sensor for mercury ion detection and preparation method and application thereof

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preparation example Construction

[0034] The present invention also provides a method for preparing the sensor described above, wherein the preparation method includes:

[0035] 1) mixing surfactant, water, selenium dioxide and ascorbic acid to prepare selenium nanoparticles;

[0036] 2) Adding soluble copper salt and ascorbic acid to the selenium nanoparticles prepared in step 1) to prepare a sensor for mercury ion detection.

[0037] Wherein, the reaction mechanism diagram of above-mentioned reaction process is as follows figure 1 shown.

[0038] Of course, the surfactant here can be the type of surfactant routinely used in the art to modify the nanoparticles, for example, in a preferred embodiment of the present invention, in order to improve the anti-interference and stability of the sensor , the surfactant can be further selected as one or more of polyallylamine hydrochloride, mercaptoethylamine and 3-aminopropyltriethoxysilane.

[0039] The consumption of each raw material in step 1) can not be furthe...

Embodiment 1

[0058] At 30°C, take 0.024g of polyallylamine hydrochloride, add 6.62g of water, then add a mixed solution of 0.002g of selenium dioxide and 0.021g of ascorbic acid, stir vigorously, and heat for 10min to obtain selenium nanoparticles ; Add a mixed solution of 0.01g copper sulfate and 0.028g ascorbic acid to the selenium nanoparticles prepared above, stir vigorously, and heat in a water bath for 3h to prepare the sensor A1 for mercury ion detection. The sensor A1 prepared above was tested by a scanning electron microscope, and the results obtained were as follows: figure 2 Shown; Detected by the ultraviolet-visible-near-infrared spectrophotometer, the obtained results are as follows image 3 Shown; Detect by X-ray diffractometer, the result obtained is as follows Figure 4 shown. pass figure 2 , image 3 and Figure 4 It can be seen that the prepared sensor A1, that is, copper selenide nanoparticles, has an average particle size of about 80nm, and the maximum absorption...

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Abstract

The invention discloses a sensor for mercury ion detection and a preparation method and application thereof. The sensor is Cu2-xSe nanoparticles with the surfaces modified by a surface active agent, wherein x is larger than or equal to 0 and is smaller than 2. The surface active agent, water, selenium dioxide and ascorbic acid are mixed to obtain selenium nanoparticles, and soluble copper salt and ascorbic acid are added into the obtained selenium nanoparticles to obtain the sensor; then, the sensor is added into a mercury ion standard solution, a curvilinear equation between the concentration and the absorbancy is built by detecting the absorbancy of the mercury ion standard solution when the maximum absorption wavelength lambda is equal to 920 nm, and the concentration of mercury ions in a mercury solution to be measured is obtained by measuring the absorbancy of the mercury solution to be measured. Accordingly, operation is convenient, and the sensitivity is high. The sensor is high in antijamming capability in the actual use, and therefore the effects of excellent sensitivity, high antijamming capability and good stability are achieved.

Description

technical field [0001] The invention relates to inorganic nanometer materials, in particular to a sensor for mercury ion detection and its preparation method and application. Background technique [0002] Mercury ions play an essential role in biological research and disease control, especially the concentration of mercury ions plays a very important role in the study of biological diseases and early detection. Many methods for detecting the concentration of mercury ions have been reported, and most of these detection methods use noble metals, such as gold nanoparticles, silver nanoparticles and some quantum dots to detect the concentration of mercury ions, but in the actual application process , the reactants are often expensive, for example, the reactant chloroauric acid used in the synthesis of gold nanoparticles is expensive, and quantum dots are often susceptible to interference from external conditions due to their unstable fluorescence intensity in the actual applicat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/33
Inventor 夏云生张慧鹿淋淋顾文亮赵燕陈露宫素芹
Owner ANHUI NORMAL UNIV