Method for detecting mercury ions based on triangular silver nanosheets

Abstract

The invention relates to a method for detecting mercury ions based on triangular silver nanosheets, and the inventor designs and synthesizes a triangular silver nanosheet solution which is used as a mercury ion photo-thermal sensor for detecting the concentration of the mercury ions. The detection method comprises the steps of preparing a triangular silver nanosheet solution, drawing a standard curve, detecting a to-be-detected solution and the like. The preparation method and control conditions of the triangular silver nanosheet are relatively simple, and the grown triangular silver nanosheet can be obtained only by controlling the adding amount of the growth solution. The detection method disclosed by the invention is simple to operate, and compared with the existing detection method, the method disclosed by the invention can realize on-site, rapid and accurate detection of mercury ions, is low in cost and convenient to carry, and is not interfered by other ions and colored substances.

Description

technical field [0001] The invention relates to a method for detecting mercury ions based on triangular silver nanosheets, and belongs to the technical field of mercury ion quantitative detection. Background technique [0002] Since the 21st century, a variety of electronic products have been pouring into our lives. The biggest feature of these electronic products is their amazing replacement speed, while their rapid development has also left a lot of electronic waste , more and more heavy metal ions are discharged into the environment, the most terrible of which is "mercury". "Mercury" is the only metal that exists in liquid form at room temperature and is also the protagonist of the mercury cycle. my country's drinking water standard strictly stipulates that the mercury content is less than 1μg / L. When drinking water contains more than 1 μg of mercury per liter, it will cause a strong poisoning reaction. If you drink drinking water containing a very small amount of mercu...

AI Technical Summary

Problems solved by technology

Atomic absorption spectrometry uses the radiation characteristic spectrum of hollow cathode lamps to quantitatively analyze the concentration of mercury ions through absorbance. The detection principle is simple, and there is no other ion interference in the detection process, but the detection process consumes a lot of energy and the equipment is relatively large; fluorescence analysis method The mercury ion optical sensing membrane is irradiated with light of a specific wavelength, and the fluorescence intensity at the maximum emission wavelength is proportional to the concentration of mercury ions. This method has the characteristics of high selectivity, no interference, fast response, and high sensitivity. The stability and life are relatively fragile in complex wastewater environments, and because of its cumbersome manufacturing process and harsh conditions, it is difficult to popularize; the electrochemical method is based on the Nernst equation combined with mercury ion selective electrodes, as long as the metal poison mercury is chemically treated After configuration into electrolyte electrolysis, the electromotive force is proportional to the logarithm of the ion concentration. The principle of this method is simple to measure mercury ions. However, due to the presence of many interfering ions in the solution such as Fe 3+ 、Ag + 、Al 3+ etc. In the actual detection process, it is necessary to carry out cumbersome masking treatment on the waste liquid

Because the above methods rely on sophisticated testing instruments and professional operating procedures, it is extremely time-consuming and energy-intensive to measure mercury ions, and they are not time-sensitive.

Images