Synthetic method of acetone-oriented multilayer CsxWO3/Ti3C2Tx composite material

A composite material and synthesis method technology, applied in the field of nano-inorganic material preparation, can solve the problems of non-selectivity, low response value, unsatisfactory response value and detection limit, etc., and achieve high detection limit, high response, excellent acetone transmission The effect of sensibility

Inactive Publication Date: 2022-04-05
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When tungsten oxide material is used as a gas-sensing material, it has good gas selectivity to acetone gas and good acetone sensing performance, but its response value and detection limit are not ideal.
The MXenes material can detect various gases at room temperature, has no selectivity, and its response value is very low

Method used

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  • Synthetic method of acetone-oriented multilayer CsxWO3/Ti3C2Tx composite material
  • Synthetic method of acetone-oriented multilayer CsxWO3/Ti3C2Tx composite material
  • Synthetic method of acetone-oriented multilayer CsxWO3/Ti3C2Tx composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1) Weigh 1g of Ti 3 AlC 2 , measure 20ml HF solution, Ti 3 AlC 2 Slowly add the powder into the HF solution and mix in the Teflon beaker, during which a lot of heat is released;

[0028] 2) Electromagnetic stirring to form a suspension, and after centrifugation, wash with deionized water until the solution pH=6;

[0029] 3) Use vacuum drying to obtain black Ti 3 C 2 T x sample;

[0030] 4) Weigh 0.2g WCl 6 Dissolve in 50ml of absolute ethanol, stir vigorously until completely dissolved to obtain a light yellow solution, then add 0.1g of CsOH·H 2 O, after mixing, add a certain amount of step 3) Ti obtained 3 C 2 T x The sample and a certain amount of acetic acid form a precursor;

[0031] 5) Transfer the resulting precursor solution to a 100ml autoclave to obtain Cs x WO 3 / Ti 3 C 2 T x composite material.

[0032] Said step 2) electromagnetic stirring for 18 hours to form a suspension, and the rotational speed of the magnetic stirrer was set at 200 rpm. ...

Embodiment 2

[0037] 1) Weigh 2g of Ti 3 AlC 2 , measure 25ml HF solution, Ti 3 AlC 2 Slowly add the powder into the HF solution and mix in the Teflon beaker, during which a lot of heat is released;

[0038] 2) Electromagnetic stirring to form a suspension, and after centrifugation, wash with deionized water until the solution pH=6;

[0039] 3) Use vacuum drying to obtain black Ti 3 C 2 T x sample;

[0040] 4) Weigh 0.3g WCl 6 Dissolve in 50ml of absolute ethanol, stir vigorously until completely dissolved to obtain a light yellow solution, then add 0.3g of CsOH·H 2 O, after mixing, add a certain amount of step 3) Ti obtained 3 C 2 T x The sample and a certain amount of acetic acid form a precursor;

[0041] 5) Transfer the resulting precursor solution to a 100ml autoclave to obtain Cs x WO 3 / Ti 3 C 2 T x composite material.

[0042] Said step 2) electromagnetic stirring for 21 hours to form a suspension, and the rotational speed of the magnetic stirrer was set at 400 rpm...

Embodiment 3

[0047] 1) Weigh 3g of Ti 3 AlC 2 , measure 30ml HF solution, Ti 3 AlC 2 Slowly add the powder into the HF solution and mix in the Teflon beaker, during which a lot of heat is released;

[0048] 2) Electromagnetic stirring to form a suspension, and after centrifugation, wash with deionized water until the solution pH=6;

[0049] 3) Use vacuum drying to obtain black Ti 3 C 2 T x sample;

[0050] 4) Weigh 0.5g WCl 6 Dissolve in 50ml of absolute ethanol, stir vigorously until completely dissolved to obtain a light yellow solution, then add 0.4g of CsOH·H 2 O, after mixing, add a certain amount of step 3) Ti obtained 3 C 2 T x The sample and a certain amount of acetic acid form a precursor;

[0051] 5) Transfer the resulting precursor solution to a 100ml autoclave to obtain Cs x WO 3 / Ti 3 C 2 T x composite material.

[0052] The step 2) electromagnetically stir for 24 hours to form a suspension, and the rotational speed of the magnetic stirrer is set at 500 rpm. ...

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Abstract

The invention discloses a synthetic method of an acetone-oriented multi-layer CsxWO3/Ti3C2Tx composite material. The synthetic method comprises the following steps: preparing a precursor; the preparation method comprises the following steps: 1) weighing 1-3g of Ti3AlC2, weighing 20-30ml of HF solution, slowly adding Ti3AlC2 powder into the HF solution, mixing in a polytetrafluoroethylene beaker, and releasing a large amount of heat during mixing; 2) electromagnetically stirring to form a suspension, centrifuging, and washing with deionized water until the pH value of the solution is 6; (3) carrying out vacuum drying to obtain a black Ti < 3 > C < 2 > T < x > sample; 4) weighing 0.2-0.5 g of WCl6, dissolving the WCl6 in 50ml of absolute ethyl alcohol, violently stirring until the WCl6 is completely dissolved to obtain a faint yellow solution, adding 0.1-0.4 g of CsOH.H2O, uniformly mixing, and adding a certain amount of the Ti3C2Tx sample obtained in the step 3) and a certain amount of acetic acid to form a precursor solution; and (5) transferring the obtained precursor solution into a 100ml high-pressure reaction kettle, so as to obtain the CsxWO3/Ti3C2Tx composite material. The gas sensitive element prepared by the invention shows high response to acetone and relatively high detection limit.

Description

technical field [0001] The invention relates to the technical field of preparation of nano-inorganic materials, in particular to an acetone-oriented multilayer Cs x WO 3 / Ti 3 C 2 T x Methods of synthesis of composite materials. Background technique [0002] ZnO is the most commonly used acetone gas sensing material, it has good thermal stability, high conductivity mobility, and it can respond to volatile organic compounds. Li et al. (Li Si-Meng, Zhang Le-Xi, Zhu Meng-Ya, etal.Acetone sensing of ZnO nanosheets synthesized using room-temperatureprecip-itation[J].Sensors and Actuators,B:Chemical,2017,249:611- 623) Nano-ZnO was successfully prepared by the rapid precipitation method, so that the non-polar (100) crystal plane can be detected, and its high-energy crystal plane has more defects that are conducive to the adsorption of gas molecules and its surface energy is relatively increased. And because of the increase in the number of defects, the adsorption sites of gas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/56C04B35/626C01G41/00C01B32/921C01B32/90G01N27/12
Inventor 张彪刘泓宇周晓刘密施佩李学林朱建锋王芬
Owner SHAANXI UNIV OF SCI & TECH
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