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Micro-nano porous bismuth electrode and preparation method thereof

An electrode, micro-nano technology, applied in the field of bismuth electrodes, can solve the problems that the preparation method needs to be improved and innovated, it is difficult to adapt to large-scale production, and there are many influencing factors, so as to achieve strong microstructure tunability, low market price, and simple process. Effect

Inactive Publication Date: 2012-10-03
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, judging from the current research situation, there are many shortcomings in the preparation of porous bismuth film electrodes by various "template methods", such as cumbersome operation, many influencing factors, poor reproducibility, and difficulty in adapting to large-scale production. improvement and innovation

Method used

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  • Micro-nano porous bismuth electrode and preparation method thereof
  • Micro-nano porous bismuth electrode and preparation method thereof
  • Micro-nano porous bismuth electrode and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] A micro-nanoporous bismuth electrode is prepared by the following steps:

[0053] (1) Preparation of tin-bismuth alloy electrodes: Weigh 2.657g of metal bismuth (purity: 99.5%) and 0.646g of tin (purity: 99.5%), put them into a quartz glass tube, move them to a resistance furnace and heat for 30 minutes. The internal temperature is 450°C. During the heating process, the quartz glass tube is constantly shaken to fully mix the metal bismuth and tin melts. Finally, the melts are cooled and solidified to form an alloy. Cut the alloy with a saw blade and use 4 in sequence # and 6 # Grinding with metallographic sandpaper to make it flake in shape, the specific size is 0.50cm×0.50cm×0.112mm. Put the alloy into acetone, absolute alcohol, and deionized water for 15 minutes for ultrasonic cleaning, and dry it with nitrogen to obtain a tin-bismuth alloy electrode.

[0054] (2) Tin dissolving treatment: AUTOLAB electrochemical workstation is used to carry out constant potential ...

Embodiment 2

[0057] A micro-nanoporous bismuth electrode is prepared by the following steps:

[0058] (1) Preparation of tin-bismuth alloy electrode: Weigh 1.380g of metal bismuth (purity 99.5%) and tin (purity 99.5%) 1.827g, put them into a quartz glass tube, move to a resistance furnace and heat for 30 minutes, the furnace The internal temperature is 450°C. During the heating process, the quartz glass tube is constantly shaken to fully mix the metal bismuth and tin melts. Finally, the melts are cooled and solidified to form an alloy. Cut the alloy with a saw blade and use 4 in sequence # and 6 # Grinding with metallographic sandpaper to make it flake in shape, the specific size is 0.50cm×0.50cm×0.112mm. Put the alloy into acetone, absolute alcohol, and deionized water for 15 minutes for ultrasonic cleaning, and dry it with nitrogen to obtain a tin-bismuth alloy electrode.

[0059] (2) Tin dissolving treatment: AUTOLAB electrochemical workstation is used to carry out constant potential...

Embodiment 3

[0062] A micro-nanoporous bismuth electrode is prepared by the following steps:

[0063] (1) Preparation of tin-bismuth alloy electrodes: Weigh 2.657g of metal bismuth (purity: 99.5%) and 0.646g of tin (purity: 99.5%), put them into a quartz glass tube, move them to a resistance furnace and heat for 30 minutes. The internal temperature is 450°C. During the heating process, the quartz glass tube is constantly shaken to fully mix the metal bismuth and tin melts. Finally, the melts are cooled and solidified to form an alloy. Cut the alloy with a saw blade and use 4 in sequence # and 6 # Grind with metallographic sandpaper to make it strip-shaped, with a specific size of 0.10cm×0.10cm×1.00cm. Put the alloy into acetone, absolute alcohol, and deionized water for 15 minutes for ultrasonic cleaning, and dry it with nitrogen to obtain a tin-bismuth alloy electrode.

[0064] (2) Tin dissolving treatment: AUTOLAB electrochemical workstation is used to carry out constant potential tin...

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Abstract

The invention discloses a micro-nano porous bismuth electrode and a preparation method thereof. The preparation method for the micro-nano porous bismuth electrode comprises the following steps: preparing a tin bismuth alloy, wherein a mass ratio of tin to bismuth in the tin bismuth alloy is 1:(0.5-6); processing appearance of the tin bismuth alloy, thereby obtaining a tin bismuth alloy electrode; performing alloy tin-melting treatment on the tin bismuth alloy electrode according to an electrochemical method, and arranging a tin-melting potential between corrosion potentials of metal tin and bismuth, thereby obtaining the micro-nano porous bismuth electrode; and if necessary, performing anodic oxidation treatment on the micro-nano porous bismuth electrode, thereby obtaining the micro-nano porous bismuth electrode with suitable pores and size. The preparation method provided by the invention has the advantages of simple technology, environmental protection and zero pollution; the production cost of the micro-nano porous bismuth electrode is low; and the obtained micro-nano porous bismuth electrode has the advantages of strong adjustability of microstructure, flexible and controllable macroscopic shape and size, big specific surface area, high detection sensitivity and application to the detection for trace heavy metal ions and trace organic matters in liquid.

Description

technical field [0001] The invention relates to a bismuth electrode, in particular to a micro-nano porous bismuth electrode and its application in the detection of trace heavy metals and trace organic matter. Background technique [0002] With the continuous progress of human society, various heavy metal elements are widely used in all aspects of people's daily production and life, so it is inevitable that due to man-made or natural factors, a large amount of heavy metals will be discharged into the soil and surface water, especially It is highly toxic lead, cadmium, chromium, arsenic, etc., which lead to the accumulation of excessive heavy metals in many organisms, which deteriorates the ecological environment and seriously threatens human health and life safety. [0003] In recent years, various heavy metal pollution incidents have occurred frequently, which has gradually attracted people's attention. Various methods for the detection of heavy metal ions have also been dev...

Claims

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Application Information

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IPC IPC(8): G01N27/30
Inventor 任山李康劲刘芳敏洪澜
Owner SUN YAT SEN UNIV
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