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Preparation method of formaldehyde gas sensitive materials based on tin mud modification in tin plating process and application

A technology of formaldehyde gas and tin sludge, which is applied in the direction of material analysis, material resistance, and material analysis through electromagnetic means, can solve problems such as environmental pollution, high economic cost, waste of tin resources, etc., to solve difficult to handle, reduce production and Emission treatment cost and the effect of mitigating the loss of tin resources

Active Publication Date: 2018-08-21
NORTHEASTERN UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method and application for preparing formaldehyde gas-sensitive materials based on the modification of tin sludge in the tin plating process. The waste tin sludge produced in the production process of tin plating is acidified and activated, washed and filtered, dehydrated and dried. agent; precious metal doping; after sintering treatment; then mixed with a certain amount of solvent to form a uniform slurry coated on Al 2 o 3 The surface of the ceramic tube is heat-treated and aged to make a formaldehyde gas sensor, which not only solves the problems of serious waste of tin resources, high economic costs for enterprises, and serious environmental pollution, but also comprehensively utilizes in the field of formaldehyde gas-sensing materials

Method used

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  • Preparation method of formaldehyde gas sensitive materials based on tin mud modification in tin plating process and application
  • Preparation method of formaldehyde gas sensitive materials based on tin mud modification in tin plating process and application

Examples

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Effect test

Embodiment 1

[0029] Take 2g of the tin sludge in the electroplating bath filtrated in large-scale industrial production and dissolve it in 30ml of 40% nitric acid, stir it magnetically for 30min at a water bath temperature of 40°C for activation treatment, then suction filter the liquid, and filter the residue Continue to dissolve in 30ml deionized water, wash under magnetic stirring, and repeat suction filtration and washing three times. Then, the filter residue washed for the third time was dissolved in 30 ml of absolute ethanol and washed three times under magnetic stirring, and the product after suction filtration was dried in an oven at 60° C. for 12 hours. Grind the dried sample into a uniform powder in an agate mortar, and dissolve it in 40mlV under vigorous stirring. 水 :V 无水乙醇 = In the 1:1 mixed solution, add 0.5g PVP as a protective agent to the above solution at a water bath temperature of 60°C, and then add AgNO at a doping mass ratio of 1%. 3 solution and 0.1g ascorbic acid i...

Embodiment 2

[0035]Take 2g of the tin sludge in the electroplating bath filtered out in large-scale industrial production and dissolve it in 30ml of 40% nitric acid, stir it magnetically for 30min at a water bath temperature of 40°C for activation treatment, then suction filter the liquid, and filter the residue Continue to dissolve in 30ml deionized water, wash under magnetic stirring, and repeat suction filtration and washing three times. Then, the filter residue washed for the third time was dissolved in 30 ml of absolute ethanol and washed three times under magnetic stirring, and the product after suction filtration was dried in an oven at 60° C. for 12 hours. Grind the dried sample into a uniform powder in an agate mortar, and dissolve it in 40mlV under vigorous stirring. 水 :V 无水乙醇 = In the 1:1 mixed solution, add 0.5g PVP as a protective agent to the above solution at a water bath temperature of 50°C, and then add AgNO according to the doping mass ratio of 2%. 3 solution and 0.1g a...

Embodiment 3

[0039] Take 2g of the tin sludge in the electroplating bath filtered out in large-scale industrial production and dissolve it in 30ml of 40% nitric acid, stir it magnetically for 30min at a water bath temperature of 40°C for activation treatment, then suction filter the liquid, and filter the residue Continue to dissolve in 30ml deionized water, wash under magnetic stirring, and repeat suction filtration and washing three times. Then, the filter residue washed for the third time was dissolved in 30 ml of absolute ethanol and washed three times under magnetic stirring, and the product after suction filtration was dried in an oven at 60° C. for 12 hours. Grind the dried sample into a uniform powder in an agate mortar, and dissolve it in 40mlV under vigorous stirring. 水 :V 无水乙醇 = In the 1:1 mixed solution, add 0.5g PVP as a protective agent to the above solution at a water bath temperature of 60°C, and then add HPtCl according to the doping mass ratio of 1%. 6 solution and 0.1g...

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Abstract

The invention belongs to the field of comprehensive recycling of industrial waste tin, environmental protection and semiconductor oxide formaldehyde gas sensors, and relates to a preparation method offormaldehyde gas sensitive materials based on tin mud modification in a tin plating process and an application. The formaldehyde gas-sensitive materials are prepared from waste tin mud existing at the bottom of a plating bath on a tin plating production line by acidification activation, washing, drying, noble metal doping and subsequent heat treatment. The prepared gas sensor has excellent gas-sensitive performance such as high sensitivity, fast response, high recovery speed and the like for formaldehyde. Effective and reasonable utilization of tin resources is realized, the economic cost isreduced, environmental pollution caused by waste is reduced, and the preparation method is environmentally friendly.

Description

technical field [0001] The invention belongs to the field of comprehensive recovery and utilization of industrial waste tin, environmental protection and semiconductor oxide formaldehyde gas sensor, in particular to the modification treatment of tin sludge in the tin plating process and the preparation of the gas sensor for detecting formaldehyde. Background technique [0002] In the electroplating solution of tin plating on the tinning production line of Baosteel Cold Rolling Sheet Factory, Sn is added to the plating solution through a special tin melting system. 2+ , in conventional continuous industrial production, Sn 2+ Oxidized to Sn 4+ , Sn 4+ with SnO 2 The form exists in the bottom of the plating tank to form a large amount of tin sludge. It is a by-product of industrial waste, and the annual discharge of enterprises is about tens of tons. However, tin is a scarce resource, and the discharge of tin sludge means a large loss of tin resources and high economic pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/12
CPCG01N27/125
Inventor 于慧敏李建中尹远洪付玉
Owner NORTHEASTERN UNIV
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