Production and detection method of plated bismuth gold micro-array electrode for detecting heavy metals

A technology of microarray electrode and manufacturing method, which is applied to the technology for producing decorative surface effects, metal material coating technology, microstructure technology, etc., can solve problems such as volatility and human body hazards, and facilitate miniaturization , The processing technology is mature, and the effect of improving the detection safety

Active Publication Date: 2012-01-18
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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Problems solved by technology

[0002] Stripping voltammetry in the electrochemical method can be used to detect heavy metals. In the initial stage when this method was developed, mercury was often used as a medium for enriching heavy metals, but it is well known that mercury itself is a heavy metal that is harmful to the human body, and It is volatile, so this brings great limitations to the application of stripping voltammetry to detect heavy metals

Method used

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  • Production and detection method of plated bismuth gold micro-array electrode for detecting heavy metals
  • Production and detection method of plated bismuth gold micro-array electrode for detecting heavy metals
  • Production and detection method of plated bismuth gold micro-array electrode for detecting heavy metals

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Embodiment Construction

[0026] 1. Fabrication of gold microarray electrodes

[0027] 1) Silicon oxidation

[0028] a. Clean silicon wafer

[0029] First place the wafer in 30% H 2 o 2 and H 2 SO 4 Prepare the cleaning solution in a ratio of 1:5, heat it in an electric furnace for 20 minutes, then clean it with deionized water after cooling, then blow dry it with nitrogen, and finally bake it in an oven at 120°C for 30 minutes to remove the water. steam.

[0030] b. Oxidation to produce silica

[0031] Growth of SiO on silicon surface 2 The methods generally include chemical vapor deposition and thermal oxidation. The equipment for chemical vapor deposition of oxides is relatively expensive, and the production cost of producing oxide layers is relatively high, and it is usually used when low temperatures are required. The manufacturing cost of thermal oxidation is relatively low, but the structure must be able to withstand high temperature treatment, silicon thermal oxidation has two kinds of...

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Abstract

The invention relates to a production and detection method of a plated bismuth gold micro-array electrode for detecting heavy metals, which is characterized in that: in a bismuth plating process of a production machine of a gold micro-array electrode, when 0.015mol / L Bi (NO3) 3 . 5H2O, 1 mol / L KNO3 and 1% HNO3 are used to plate heavy metals, magnetic stirring is added to improve the plating efficiency. The micro-array electrode is used as a wok electrode of stripping voltammetry to form a sensor for detecting the heavy metals, liquid is prepared, and parameter values of the voltammetry are set to complete the detection of the heavy metals lead, cadmium or nickel, and the sensitivity is up to the national drinking water standards.

Description

technical field [0001] The invention relates to a simple and low-cost manufacturing method and detection method of a bismuth-coated microarray electrode for heavy metal detection, belonging to the field of microprocessing. Background technique [0002] Stripping voltammetry in the electrochemical method can be used to detect heavy metals. In the initial stage when this method was developed, mercury was often used as a medium for enriching heavy metals, but it is well known that mercury itself is a heavy metal that is harmful to the human body, and It is volatile, so this brings great limitations to the application of stripping voltammetry to detect heavy metals. [0003] In 2001, Jung-Yuen Choi et al. made a heavy metal detection sensor containing HgO modified working electrode, Ag / AgCl reference electrode and carbon counter electrode by screen printing process [Choi, J., Seo, K. , Cho, S., Oh, J., Kahng, S., and Park, J., Analytica Chimica Acta, Screen-printed anodic strip...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30B81C1/00
Inventor 金庆辉刘德盟金妍赵建龙
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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