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Sensitive material for rapidly detecting ethanol and acetone

A sensitive material, ethanol technology, applied in the field of sensing, can solve problems such as time-consuming, large errors, and complicated analysis steps

Inactive Publication Date: 2015-01-07
BEIJING UNION UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of this method is that the analysis steps are complex, time-consuming, and require expensive equipment
The current ethanol online sensors or analyzers, such as the alcohol concentration detectors used by the traffic control department, mostly use electrochemical and colorimetric methods, and the errors are relatively large, so they can only be used as a semi-quantitative analysis method.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Co-dissolve yttrium acetate tetrahydrate, titanium sulfate nonahydrate, zinc sulfate tetrahydrate and zinc chloride dihydrate in an aqueous nitric acid solution with a mass fraction of 15%, add appropriate amount of citric acid and isopropanol, and stir at a constant temperature at 50°C 1 hour, then add an appropriate amount of glucose and chloroplatinic acid, reflux at 102°C for 5 hours, add an appropriate amount of graphene and ethylene glycol after cooling, ultrasonically oscillate for 2 hours, and rotary evaporate at 80°C to obtain a black sticky substance. Place the viscous material in a drying oven and dry it at 110°C for 6 hours, then raise the temperature to 270°C at a rate of no more than 3°C per minute in a box-type resistance furnace, keep this temperature for 7 hours, and cool naturally to obtain graphene support of Y doped by Pt atoms 2 o 3 、TiO 2 Composite sensitive material composed of ZnO and ZnO.

[0012] Analysis: Composition analysis of the composi...

Embodiment 2

[0015] Co-dissolve yttrium oxalate nonahydrate, titanyl sulfate and zinc nitrate hexahydrate in an aqueous nitric acid solution with a mass fraction of 18%, add an appropriate amount of citric acid and isopropanol, stir at a constant temperature of 50°C for 2 hours, and then add an appropriate amount of glucose and chloroplatinic acid, reflux at 105°C for 3 hours, add appropriate amount of graphene and ethylene glycol after cooling, ultrasonically oscillate for 1 hour, and rotary evaporate at 85°C to obtain a black viscous substance, which is placed in a dry place Dry in the box at 115°C for 4 hours, heat up to 275°C at a rate of no more than 3°C per minute in a box-type resistance furnace, keep this temperature for 7 hours, and cool naturally to obtain graphene-supported Pt atom-doped Y 2 o 3 、TiO 2 Composite sensitive material composed of ZnO and ZnO.

[0016] Analysis: Composition analysis of the composite powder material, the measured mass percentages are 3.7% Pt, 8.5% ...

Embodiment 3

[0019] Co-dissolve yttrium nitrate hexahydrate, titanyl sulfate and zinc perchlorate hexahydrate in an aqueous nitric acid solution with a mass fraction of 20%, add an appropriate amount of citric acid and isopropanol, stir at a constant temperature of 50°C for 1 hour, and then add Appropriate amount of glucose and chloroplatinic acid, reflux at 108°C for 3.5 hours, add appropriate amount of graphene and ethylene glycol after cooling, ultrasonically oscillate for 2 hours, and rotary evaporate at 90°C to obtain a black viscous substance, which is placed in a Dry in a drying oven at 118°C for 5 hours, heat up to 280°C at a rate of no more than 3°C per minute in a box-type resistance furnace, keep this temperature for 6 hours, and cool naturally to obtain graphene-supported Pt atom-doped Miscellaneous Y 2 o 3 、TiO 2 Composite sensitive material composed of ZnO and ZnO.

[0020] Analysis: Composition analysis of the composite powder material, the measured mass percentages are 4...

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Abstract

The invention relates to a sensitive material for rapidly detecting ethanol and acetone. The sensitive material is a graphene-loaded composite sensitive material composed of platinum-atom-doped Y2O3, TiO2 and ZnO. A preparation method comprises the following steps: commonly dissolving an yttrium salt, a titanium salt and a zinc salt which are soluble in an acid water solution into nitric acid water solution; adding citric acid and isopropanol; after reacting, adding glucose and chloroplatinic acid; reflowing and cooling; then adding graphene and ethylene glycol; carrying out ultrasonic oscillation and rotary evaporation; drying, roasting and cooling black sticky materials to obtain the graphene-loaded composite sensitive material composed of the Pt-atom-doped Y2O3, the TiO2 and the ZnO. A gas sensor for monitoring ethanol and acetone, which is made of the sensitive material provided by the invention, can be used for rapidly and accurately determining the trace ethanol and acetone in the air on the scene and is not interfered by other coexisted substances.

Description

technical field [0001] The invention relates to a sensitive material for fast detection of ethanol and acetone, especially graphene-supported Y doped by platinum atoms 2 o 3 、TiO 2 The composite sensitive material composed of ZnO and ZnO belongs to the field of sensor technology. Background technique [0002] Ethanol is a colorless, transparent, volatile liquid with a special fragrance. Its density is lower than water. It can be mixed with water, acetic acid, acetone, benzene, carbon tetrachloride, chloroform, ether, ethylene glycol, glycerin, nitromethane, pyridine Miscible with solvents such as toluene, it is an important organic solvent and is widely used in many fields such as chemical industry, pharmaceuticals and printing; ethanol has a good killing effect on bacterial propagules, fungi and viruses, so it is also The most common, common and familiar disinfectant. However, ethanol vapor is easy to diffuse and can form an explosive mixture with air, which will ignite...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/76G01N31/10
Inventor 周考文李姗杨鹏越
Owner BEIJING UNION UNIVERSITY
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