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Two-dimensional spherical cavity electrode, preparation method and application thereof in trace lead ion detection

An electrode and spherical cavity technology, which is applied in the field of materials and their detection and analysis, can solve the problems that the sample pretreatment process is not suitable for high-throughput, real-time on-site screening technology, high analysis costs, and high instrument requirements, and achieves kinetics. The effect of wide response range, good selectivity and high detection sensitivity

Active Publication Date: 2015-11-11
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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Problems solved by technology

These methods have high requirements on instruments, high analysis cost, and the complex sample pretreatment process is not suitable for high-throughput, real-time on-site screening technology

Method used

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  • Two-dimensional spherical cavity electrode, preparation method and application thereof in trace lead ion detection
  • Two-dimensional spherical cavity electrode, preparation method and application thereof in trace lead ion detection
  • Two-dimensional spherical cavity electrode, preparation method and application thereof in trace lead ion detection

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Embodiment Construction

[0050] The present invention is described further below by embodiment.

[0051] 1. Experimental part

[0052] 1.1 Instruments and reagents

[0053] Reagents such as acetone, absolute ethanol, isopropanol, and sodium hydroxide are analytically pure, polystyrene microspheres, ludox-HS (40wt% silicon dioxide), and the average particle size is 10nm. All the solutions used in the experiment were deionized water three times, and the resistivity was greater than 18.4MΩcm. The area of ​​the indium tin oxide (ITO) conductive glass electrode is about 0.8cm×2cm.

[0054] 1.2 Construction of the first type of two-dimensional spherical cavity electrode

[0055] 1.2.1 Pretreatment of ordinary glass

[0056] Cut ordinary glass into 0.8cm×2cm, ultrasonically wash several times with acetone, ethanol, and deionized water three times in sequence, and sputter a layer of uniform gold film on the surface of ordinary glass by magnetron sputtering, and the sputtering time is 20min , to obtain a co...

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Abstract

The invention relates to a two-dimensional spherical cavity electrode, a preparation method and application thereof in trace lead ion detection. According to the invention, an electrochemical deposition method is employed for electro-deposition of nanogold between polystyrene arrays, then a polystyrene template is removed, finally silicon dioxide is electrodeposited on gold surface to prepare an ordered microelectrode array, and the microelectrode array is utilized to detect trace lead in water respectively. The result shows that the silicon dioxide modified two-dimensional gold spherical cavity electrode has very good detection limit and anti-interference ability to trace lead in water, and is expected to be used for real-time on-site detection of trace lead in the environment.

Description

technical field [0001] The invention relates to the field of materials and their detection and analysis, in particular to a two-dimensional spherical cavity electrode, a preparation method and its application in the detection of trace lead ions. Background technique [0002] With the development of the industrial age, environmental pollution is becoming more and more serious, and heavy metal ion pollution is one of the important aspects, which has caused a great threat to the human living environment. [0003] Lead, as a kind of off-white, soft heavy metal, is one of the "five poisonous elements" in environmental monitoring, which is a serious hazard to human health and the environment. Lead is inhaled into the human body in the form of inorganic matter or dust, or invades the human body through water and food through the digestive tract, and damages the digestive, nervous and hematopoietic systems of the human body. The rapid development has accelerated people's mining and...

Claims

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Application Information

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IPC IPC(8): G01N27/30
Inventor 钟国彬苏伟任建新刘燕郑军伟
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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