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A supported composite nano-sensitive material for detecting isobutanol gas and its preparation method

A sensitive material, load-type technology, applied in the direction of chemical reaction of materials for analysis, chemiluminescence/bioluminescence, etc., can solve the problem of time-consuming and difficult to popularize, and achieve good practical application value, high sensitivity, selectivity and good stability

Active Publication Date: 2017-08-01
BEIJING UNION UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the literature, gas chromatography is mainly used to measure isobutanol in the air. This method requires large analytical instruments to complete the measurement, so it takes a long time and is not easy to popularize.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] (1) Add concentrated hydrochloric acid, PVP and acetylacetone to absolute ethanol and stir evenly. The concentrations of concentrated hydrochloric acid, PVP and acetylacetone are respectively 0.5mol / dm 3 、40g / dm 3 and 0.05mol / dm 3 ; Add tetrabutyl titanate under stirring, the concentration of tetrabutyl titanate is 0.1mol / dm 3 ; Then slowly drop into 0.1mol / dm 3 chloroauric acid absolute ethanol solution, according to the mol ratio of Au and Ti in the target product, the addition of chloroauric acid is controlled; Regulate the pH value to 1.5 with ammonia water, stir 2 hours at room temperature; After melting for 12 hours, drying under vacuum at 60°C for 10 hours, after grinding, the temperature was raised to 500°C at a rate of 5°C / min and calcined for 4 hours to obtain Au-TiO 2 Nano powder;

[0015] (2) Au-TiO 2 Powder added Zn(NO 3 ) 2 and Cd(NO 3 ) 2 In the mixed aqueous solution, the total concentration of the mixed aqueous solution is 0.15mol / dm 3 , Zn(NO...

Embodiment 2

[0020] (1) Add concentrated hydrochloric acid, PVP and acetylacetone to absolute ethanol and stir evenly. The concentrations of concentrated hydrochloric acid, PVP and acetylacetone are respectively 1mol / dm 3 , 80g / dm 3 and 0.15mol / dm 3 ; Add tetrabutyl titanate under stirring, the concentration of tetrabutyl titanate is 0.2mol / dm 3 ; Then slowly drop into 0.25mol / dm 3 chloroauric acid absolute ethanol solution, according to the mol ratio of Au and Ti in the target product, the addition of chloroauric acid is controlled; Adjust the pH value to 2.5 with ammonia, and stir at room temperature for 2 hours; After melting for 24 hours, drying at 60°C for 10 hours under vacuum, after grinding, the temperature was raised to 700°C at a rate of 10°C / min and calcined for 7 hours to obtain Au-TiO 2 Nano powder;

[0021] (2) Au-TiO 2 Powder added Zn(NO 3 ) 2 and Cd(NO 3 ) 2 In the mixed aqueous solution, the total concentration of the mixed aqueous solution is 0.25mol / dm 3 , Zn(N...

Embodiment 3

[0026] (1) Add concentrated hydrochloric acid, PVP and acetylacetone to absolute ethanol and stir evenly. The concentrations of concentrated hydrochloric acid, PVP and acetylacetone are respectively 0.75mol / dm 3 、60g / dm 3 and 0.1mol / dm 3 ; Add tetrabutyl titanate under stirring, the concentration of tetrabutyl titanate is 0.15mol / dm 3 ; Then slowly drop into 0.175mol / dm 3chloroauric acid dehydrated alcohol solution, according to the mol ratio of Au and Ti in the target product, the addition of chloroauric acid is controlled; Regulate pH value to 2 with ammoniacal liquor, stir 2 hours at room temperature; After melting for 18 hours, drying under vacuum at 60°C for 10 hours, after grinding, the temperature was raised to 600°C at a rate of 8°C / min and calcined for 5.5 hours to obtain Au-TiO 2 Nano powder;

[0027] (2) Au-TiO 2 Powder added Zn(NO 3 ) 2 and Cd(NO 3 ) 2 In the mixed aqueous solution, the total concentration of the mixed aqueous solution is 0.20mol / dm 3 , Z...

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Abstract

The invention relates to a CdS-ZnS / Au-TiO2 supported type composite nano sensitive material for detecting isobutanol gas, and belongs to the technical field of inorganic nano-materials and sensing. The supported type composite nano sensitive material is characterized in that the supported type composite nano sensitive material is prepared from a carrier Au atom doped TiO<2> and loads CdS and Zns, CdS accounts for five percent to 20 percent, ZnS accounts for five percent to 15 percent, Au accounts for two to five percent, TiO<2> accounts for 60 percent to 80 percent, and the particle size range is 30 nm to 55 nm. An isobutanol sensor manufactured through the supported type composite nano sensitive material has the advantages of being short in response time, high in sensitivity, good in selectivity and stability and the like, and good actual application value is achieved.

Description

technical field [0001] The invention relates to CdS-ZnS / Au-TiO for detecting isobutanol gas 2 The invention relates to a loaded composite nano sensitive material and a preparation method thereof, which belong to the field of inorganic nano material and sensing technology. Background technique [0002] Isobutanol is a colorless transparent liquid with a slight odor of amyl alcohol. Isobutanol is a basic organic chemical raw material, mainly used in the production of diisobutyl phthalate plasticizers, isobutyl acetate solvents, etc.; it can be used as a diluent for adhesives, ethyl cellulose, polyvinyl alcohol Solvents for butyral, rubber, natural resins and various oils; also used as solvents for paints, inks, etc., and as cleaning agents for varnishes. Isobutanol is flammable and irritating, and its high concentration vapor can irritate the eyes, skin, mucous membranes and upper respiratory tract. [0003] In the literature, gas chromatography is mainly used to measure is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/76
Inventor 于春洋杨宏伟
Owner BEIJING UNION UNIVERSITY