N/CoTiO3@g-C3N4 composite material with alcohol-sensitive and aldehyde-sensitive dual functions as well as preparation method and application of N/CoTiO3@g-C3N4 composite material

An alcohol-sensitive aldehyde-sensitive composite material technology is applied in the field of N/CoTiO3@g-C3N4 composite material and its preparation, which can solve the problems of narrow operating temperature range, alcohol sensitivity, and long response recovery time.

Pending Publication Date: 2021-08-10
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] CoO 3 It belongs to P-type semiconductor oxide, has good chemical stability and low cost, and is widely used in the detection of ethanol gas; however, it is only sensitive to ethanol, has a narrow working temperature range, and has a long response recovery time, which has become a major problem in its practical application. resistance

Method used

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  • N/CoTiO3@g-C3N4 composite material with alcohol-sensitive and aldehyde-sensitive dual functions as well as preparation method and application of N/CoTiO3@g-C3N4 composite material
  • N/CoTiO3@g-C3N4 composite material with alcohol-sensitive and aldehyde-sensitive dual functions as well as preparation method and application of N/CoTiO3@g-C3N4 composite material
  • N/CoTiO3@g-C3N4 composite material with alcohol-sensitive and aldehyde-sensitive dual functions as well as preparation method and application of N/CoTiO3@g-C3N4 composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A kind of N / CoTiO with dual functions of alcohol-sensing and aldehyde-sensing 3 @g-C 3 N 4 A method for preparing a composite material, comprising the steps of:

[0040] Step 1) Fully dissolve analytically pure cobalt nitrate hexahydrate in ultrapure water, so that the concentration of cobalt ions in the solution reaches 0.1mol L -1 , using analytically pure hydrochloric acid to adjust the pH value of the solution to 2.0, and magnetic stirring at room temperature to obtain a purple-red transparent solution;

[0041] Step 2) Analytical pure isobutyl titanate is dissolved in absolute ethanol, so that the concentration of titanium ions in the solution reaches 0.1mol L -1 , stirred thoroughly to obtain a transparent solution. Then add the transparent solution dropwise into the above-mentioned purple-red transparent solution, control the reaction temperature at 25°C, the final volume ratio of the two solutions is 1:1, and stir magnetically for 12 hours to obtain a jelly-...

Embodiment 2

[0045] A kind of N / CoTiO with dual functions of alcohol-sensing and aldehyde-sensing 3 @g-C 3 N 4 A method for preparing a composite material, comprising the steps of:

[0046] Step 1) Fully dissolve analytically pure cobalt nitrate hexahydrate in ultrapure water, so that the cobalt ion concentration in the solution reaches 0.2mol L -1 , using analytically pure hydrochloric acid to adjust the pH value of the solution to 3.0, and magnetic stirring at room temperature to obtain a purple-red transparent solution;

[0047] Step 2) Analytical pure tetraisopropyl titanate is dissolved in absolute ethanol, so that the concentration of titanium ions in the solution reaches 0.2mol L -1 , stirred thoroughly to obtain a transparent solution. Then add the transparent solution dropwise into the above-mentioned purple-red transparent solution, control the reaction temperature to 40°C, and the final volume ratio of the two solutions to 1:2, and magnetically stir for 18 hours to obtain a ...

Embodiment 3

[0051] A kind of N / CoTiO with dual functions of alcohol-sensing and aldehyde-sensing 3 @g-C 3 N 4 A method for preparing a composite material, comprising the steps of:

[0052] Step 1) Fully dissolve analytically pure cobalt chloride in ultrapure water, so that the concentration of cobalt ions in the solution reaches 0.3mol L -1 , using analytically pure hydrochloric acid to adjust the pH value of the solution to 4.0, and magnetic stirring at room temperature to obtain a purple-red transparent solution;

[0053] Step 2) Analytical pure isobutyl titanate is dissolved in absolute ethanol so that the concentration of titanium ions in the solution reaches 0.3mol L -1 , stirred thoroughly to obtain a transparent solution. Then add the transparent solution dropwise into the above-mentioned purple-red transparent solution, control the reaction temperature at 55°C, the final volume ratio of the two solutions is 1:3, and stir magnetically for 24 hours to obtain a jelly-like gel;

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Abstract

The invention discloses an N / CoTiO3@g-C3N4 composite material with alcohol-sensitive and aldehyde-sensitive dual functions as well as a preparation method and application thereof, and belongs to the technical field of virus detection.The N / CoTiO3@g-C3N4 composite material is characterized in that tetraisopropyl titanate is hydrolyzed and cobalt nitrate is condensed to form a network macromolecular intermediate product, melamine and macromolecules are mixed, NH3 is decomposed from the melamine in a high-temperature environment, the N / CoTiO3@g-C3N4 is prepared from melamine and a macromolecular compound through a solid-phase reaction, the N / CoTiO3@g-C3N4 is prepared in one step by adopting a new synthesis process and a sol-gel in-situ synthesis technology, and the N / CoTiO3@g-C3N4 is obtained through the steps of doping, compounding, crystallization and the like through one-step synthesis, so that the N / CoTiO3@g-C3N4 has the characteristics of simple preparation method, controllable composition, high production efficiency, excellent sensitive selectivity and the like. The method can realize accurate detection of ethanol and acrolein, and can be widely applied to expiration detection of viral pneumonia patients in clinical medicine.

Description

technical field [0001] The invention belongs to the technical field of virus detection, and relates to a N / CoTiO with dual functions of alcohol-sensitivity and aldehyde-sensitivity 3 @g-C 3 N 4 Composite materials and their preparation methods and applications. Background technique [0002] The breath detection technology based on the gas sensitive response of semiconductor materials has been applied in the field of medical diagnosis in recent years, for example: using C 3 N 4 / SnO 2 The composite material detects the acetone content in the exhaled breath, which can determine whether the person being tested has diabetes; using α-Fe 2 o 3 / g -C 3 N 4 Composite, or g-C 3 N 4 / MnO 2 Composite material detects H in exhaled breath 2 The S content can determine whether the subject is suffering from bad breath. Most of the current sensitive materials respond to a single atmosphere, which has limitations in practical applications, especially in the field of medical dete...

Claims

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Application Information

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IPC IPC(8): G01N33/00C01G51/00C01B21/082
CPCG01N33/0047C01G51/00C01B21/0605C01P2002/72C01P2004/03
Inventor 卢靖张颖徐灿王亚军付子晋
Owner SHAANXI UNIV OF SCI & TECH
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