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Platinum-loaded Zinc Tungstate Nanomaterials and Its Application in the Field of Gas Sensing

A nano-material, zinc tungstate technology, applied in the field of gas sensors, can solve the problem of low hydrogen sensitivity, achieve uniform dispersion, small size, and avoid baseline displacement

Inactive Publication Date: 2019-03-08
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, pure zinc tungstate nanomaterials are less sensitive to hydrogen

Method used

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  • Platinum-loaded Zinc Tungstate Nanomaterials and Its Application in the Field of Gas Sensing
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  • Platinum-loaded Zinc Tungstate Nanomaterials and Its Application in the Field of Gas Sensing

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Experimental program
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Effect test

Embodiment 1

[0047] A method for preparing a platinum-loaded zinc tungstate nanomaterial, which is prepared according to the following steps:

[0048] Step 1, 1mmol Na 2 WO 4 2H 2 O, 5.44 mmol CH 3 COONa·3H 2 O and 0.46g PVP were added to 15ml of the solution, stirred until evenly dispersed (forming a uniform and transparent solution), wherein the solution was deionized aqueous solution of ethylene glycol, and the volume ratio of ethylene glycol and deionized water was 14:1.

[0049] Step 2, in the solution that step 1 obtains, it is the Zn(CH 3 COO) 2 The aqueous solution was stirred and dispersed evenly, and the dropwise addition was completed within 35 minutes.

[0050] Step 3, transfer the solution obtained in step 2 to a 60mL polytetrafluoroethylene autoclave, start from room temperature (20-25°C) at a rate of 8°C / min to 180°C, and react at 180°C for 12 hours , after the completion of the reaction, cool naturally to room temperature, centrifuge the mixture after the completion ...

Embodiment 2

[0053] A method for preparing a platinum-loaded zinc tungstate nanomaterial, which is prepared according to the following steps:

[0054] Step 1, 1mmol Na 2 WO 4 2H 2 O, 5.44 mmol CH 3 COONa·3H 2 O and 0.46g of PVP were added to 15ml of the solution, stirred until evenly dispersed (forming a uniform and transparent solution), wherein the solution was deionized water.

[0055] Step 2, in the solution that step 1 obtains, it is the Zn(CH 3 COO) 2 The aqueous solution was stirred and dispersed evenly, and the dropwise addition was completed within 35 minutes.

[0056] Step 3, transfer the solution obtained in step 2 to a 60mL polytetrafluoroethylene autoclave, start from room temperature (20-25°C) at a rate of 8°C / min to 180°C, and react at 180°C for 12 hours , after the completion of the reaction, cool naturally to room temperature, centrifuge the mixture after the completion of the reaction to obtain a white precipitate, wash with deionized water and absolute ethanol 8 t...

Embodiment 3

[0059] A method for preparing a platinum-loaded zinc tungstate nanomaterial, which is prepared according to the following steps:

[0060] Step 1, 1mmol Na 2 WO 4 2H 2 O, 5.44 mmol CH 3 COONa·3H 2 O and 0.46g PVP were added to 15ml of the solution, stirred until evenly dispersed (forming a uniform and transparent solution), wherein the solution was deionized aqueous solution of ethylene glycol, and the volume ratio of ethylene glycol and deionized water was 14:1.

[0061] Step 2, in the solution that step 1 obtains, it is the Zn(CH 3 COO) 2 The aqueous solution was stirred and dispersed evenly, and the dropwise addition was completed within 35 minutes.

[0062] Step 3, transfer the solution obtained in step 2 to a 60mL polytetrafluoroethylene autoclave, start from room temperature (20-25°C) at a rate of 8°C / min to 180°C, and react at 180°C for 12 hours , after the completion of the reaction, cool naturally to room temperature, centrifuge the mixture after the completion ...

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Abstract

The invention discloses a platinized zinc tungstate nano material and application thereof in the gas-sensing field. The platinized zinc tungstate nano material comprises a zinc tungstate nano material and a platinum layer loaded on a partial surface of the zinc tungstate nano material, wherein the zinc tungstate nano material is a zinc tungstate nano rod or a zinc tungstate nano particle, and the mole ratio of metal platinum and zinc tungstate is (15-20):1. At room temperature, when hydrogen concentration is 1-4%, the sensitivity range of the platinized zinc tungstate nano rod is 9.3-13, and when the hydrogen concentration is 2-4%, the sensitivity range of the platinized zinc tungstate nano particle is 3-5.8. The prepared platinized zinc tungstate nano material is uniform in dispersion and small in size, sensitivity of the zinc tungstate nano material in hydrogen can be improved after the zinc tungstate nano material is platinized, and the ambient humidity influence is eliminated to prevent baseline shift.

Description

technical field [0001] The invention belongs to the field of gas-sensing sensors, and in particular relates to a platinum-loaded zinc tungstate nanomaterial and its application in the field of gas-sensing. Background technique [0002] Metal tungstate is an important class of inorganic materials. It has good application prospects in optical fibers, scintillation materials, photoluminescent substances, humidity sensors, magnetic devices, microwave applications, catalysts and corrosion inhibitors, and has become a focus in recent years. One of the inorganic materials studied. Among them, zinc tungstate nanomaterials are good photoluminescence, photocatalysis and gas-sensitive materials. However, pure zinc tungstate nanomaterials are less sensitive to hydrogen. Contents of the invention [0003] Aiming at the deficiencies of the prior art, the object of the present invention is to provide a platinum-loaded zinc tungstate nanomaterial and its application in the field of gas ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B82B1/00B82B3/00B82Y30/00G01N27/12
CPCB82B1/008B82B3/0033B82Y30/00G01N27/127
Inventor 张克云梁砚琴杨贤金崔振铎朱胜利李朝阳
Owner TIANJIN UNIV
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