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Luminescent sensitive material catalyzed by benzene and sulfur dioxide

A technology of sulfur dioxide and sensitive materials, which is applied in the direction of chemical analysis using catalysis, which can solve the problems of complex operation and inability to realize on-site

Inactive Publication Date: 2016-06-01
BEIJING UNION UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods have relatively high sensitivity, but the operation is complicated and must be completed in the laboratory, which cannot be realized on site.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] [1] Slowly add natural graphite to oleum at 40°C under continuous stirring, slowly add phosphoric acid equal to the weight of natural graphite after constant temperature stirring for 2 hours, continue constant temperature stirring for 3 hours, suction filter and wash the filtrate until Neutral; add the filter cake to the concentrated sulfuric acid solution of potassium permanganate with a mass fraction of 15%, raise the temperature to 50°C and continue to stir for 2 hours, slowly add a 25% aqueous hydrogen peroxide solution until there are no bubbles, continue Stir at constant temperature for 1 hour, filter with suction and wash the filtrate to neutrality to obtain graphene oxide;

[0013] [2] Dissolving bismuth oxalate heptahydrate in 15% hydrochloric acid aqueous solution to form solution A, dissolving lead acetate trihydrate in 25% citric acid aqueous solution to form solution B, dissolving indium nitrate trihydrate in mass fraction Solution C is formed in a 35% isob...

Embodiment 2

[0017] [1] Slowly add natural graphite to oleum at 40°C under continuous stirring, slowly add phosphoric acid equal to the weight of natural graphite after constant temperature stirring for 2 hours, continue constant temperature stirring for 3 hours, suction filter and wash the filtrate until Neutral; add the filter cake to the concentrated sulfuric acid solution of potassium permanganate with a mass fraction of 15%, raise the temperature to 46°C and continue to stir for 2 hours, slowly add a 25% aqueous hydrogen peroxide solution until there are no bubbles, continue Stir at constant temperature for 1 hour, filter with suction and wash the filtrate to neutrality to obtain graphene oxide;

[0018] [2] Dissolving bismuth acetate in 11% hydrochloric acid aqueous solution to form solution A, dissolving lead nitrate in 21% citric acid aqueous solution to form solution B, dissolving indium nitrate trihydrate in 39 % isobutanol aqueous solution to form solution C; under continuous st...

Embodiment 3

[0022] [1] Slowly add natural graphite to oleum at 40°C under continuous stirring, slowly add phosphoric acid equal to the weight of natural graphite after constant temperature stirring for 2 hours, continue constant temperature stirring for 3 hours, suction filter and wash the filtrate until Neutral; add the filter cake to the concentrated sulfuric acid solution of potassium permanganate with a mass fraction of 15%, raise the temperature to 54°C and continue to stir for 2 hours, slowly add a 25% aqueous hydrogen peroxide solution until there are no bubbles, continue Stir at constant temperature for 1 hour, filter with suction and wash the filtrate to neutrality to obtain graphene oxide;

[0023] [2] dissolving bismuth nitrate pentahydrate in 19% hydrochloric acid aqueous solution to form solution A, dissolving lead thiocyanate in 24% citric acid aqueous solution to form solution B, dissolving indium sulfate pentahydrate in Form solution C in the isobutanol aqueous solution th...

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PUM

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Abstract

The invention discloses a luminescent sensitive material catalyzed by benzene and sulfur dioxide, which is characterized in that the material is a graphene-loaded composite material prepared from Bi2O3, PbO and In2O3. The preparation method comprises the following steps of oxidizing natural graphite by utilization of fuming sulfuric acid, a potassium permanganate concentrated sulfuric acid solution and hydrogen peroxide respectively so as to prepare graphene oxide; preparing bismuth oxalate, lead acetate and indium nitrate into a solution, adding agar powder to form gel, and drying, sintering and cooling the gel so as to obtain a complex metal oxide composed of Bi2O3, PbO and In2O3; adding the complex metal oxide and the graphene oxide into a hydrazine hydrate solution, illuminating the solution by utilization of an xenon lamp, and filtering and drying to obtain the graphene-loaded composite material prepared from Bi2O3, PbO and In2O3. The sensitive material provided by the invention has the advantage that the operation of quickly and accurately measuring trace benzene and sulfur dioxide in the air on site can be performed without the interference of common coexistent substances by a gas sensor made of the sensitive material.

Description

technical field [0001] The present invention relates to a kind of catalytic luminescence sensitive material of benzene and sulfur dioxide, especially the Bi supported by graphene 2 o 3 , PbO and In 2 o 3 The composite material of the composition belongs to the technical field of catalytic new materials. Background technique [0002] Benzene is a chemical raw material with an aromatic smell. The benzene in the air mainly comes from architectural coatings, decorative paints, adhesive solutions and automobile exhaust. Chronic benzene poisoning is mainly irritating to the skin, eyes and upper respiratory tract; frequent exposure to benzene can cause skin dryness and desquamation due to degreasing, and some allergic eczema occurs; long-term inhalation of benzene can lead to aplastic anemia. Benzene has been identified as a carcinogen by the International Cancer Research Center (IARC) and is a major pollutant in indoor air. [0003] One of the main pollutants in the atmospher...

Claims

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Application Information

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IPC IPC(8): G01N31/10
CPCG01N31/10
Inventor 周考文范慧珍彭兆快
Owner BEIJING UNION UNIVERSITY
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