LSPR (Localized Surface Plasmon Resonance) sensor membrane for measuring mercury ion and preparation method thereof
A technology for sensing membranes and mercury ions, applied in the direction of color/spectral characteristic measurement, etc., can solve the problems of long analysis period, complicated operation, and low sensitivity, and achieve the effect of being suitable for popularization and application, simple preparation method, and improved sensitivity
Active Publication Date: 2014-01-29
苏州三木知识产权服务有限公司
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Problems solved by technology
However, most of the above methods have problems such as complex pretreatment process, long analysis period, and expensive instruments, which are difficult to meet the requirements of on-site and rapid analysis.
Spectrophotometry (colorimetry) has been widely used as a method for rapid detection of Hg(II), but the traditional spectrophotometry is complicated to operate, requires the use of organic color reagents and solvents, and is easy to cause secondary pollution to the environment. Low, poor selectivity, etc. limit its practical application
Method used
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Embodiment 1
[0032] see Figure 1~6 Shown, a kind of preparation method for measuring the LSPR sensing film of mercury ion, comprises the steps:
[0033] (1) Divide the ITO conductive glass into a rectangle with a length of 4.0 cm and a width of 0.6 cm, followed by ultrasonic cleaning with ammonia water (water: concentrated ammonia water = 30:1), deionized water, absolute ethanol, and sub-boiling water for 10 min, and then 5.0 mL plating solution (plating solution composition: 0.3 mL 1 mM HAuCl 4 , 0.7 mL of 1 mM AgNO 3 , 1 mL 1:150 ammonia water, 3 mL pH=8.0 phosphate buffer solution) by cyclic voltammetry to electrodeposit gold-silver alloy nanoparticles, deposition conditions: temperature 30 ℃, nitrogen protection, sweep rate 0.05 V / s, The potential range is 0~-0.9 V, and the number of scanning cycles is 30; the metal nano-film is obtained;
[0034] (2) Soak the above metal nanomembrane in 1 g / 100 mL PVP solution at 30 °C for 0.5 hour, wash with water and dry it for later use.
[00...
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Abstract
The invention discloses an LSPR (Localized Surface Plasmon Resonance) sensor membrane for measuring mercury ion and a preparation method thereof, wherein the method comprises the following steps: (a) directly depositing the gold-silver alloy nano particle on the ITO conductive glass surface through electrochemical method to obtain the metal nano membrane, in which the mol ratio of the gold to the silver is 1:1-3; (b) immersing the metal nano membrane in the polyvinylpyrrolidone aqueous solution to form a polyvinylpyrrolidone protection membrane, cleaning and airing to obtain the LSPR sensor membrane. By combining the sensor unit and the reagent into a whole, the sensing without reagent is realized. The test block is simple to operate, convenient to use, high in sensitivity and good in selectivity; the Hg(II) can be measured through spectrophotometer in quantification and measured in a mode determination on the nature or semiquantitative through an ocular estimate.
Description
technical field [0001] The invention relates to an LSPR sensing film for measuring mercury ions and a preparation method thereof. Background technique [0002] Nowadays, metal pollution has become a global problem to be solved. At least 20 kinds of metals have been classified as toxic metals, half of which are heavy metals, such as lead, chromium, mercury, nickel, etc. The biological toxicity of these metals is very high, which will cause great harm to human health and the environment. Mercury is one of the most poisonous metals, a very small amount of mercury will damage the human brain, kidney, heart and stomach. Mercury mainly comes from mining, metallurgy, chlor-alkali industry, electrical industry and combustion of fossil fuels. After the inorganic mercury enters the atmospheric circulation system and water circulation, it is transformed into organic mercury (methylmercury, ethylmercury) in the living body, and the toxicity is greatly enhanced. Finally, it accumulate...
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Login to View More IPC IPC(8): G01N21/31G01N21/29
Inventor 狄俊伟陶红高妍
Owner 苏州三木知识产权服务有限公司