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Preparation method for 3DOM WO3 material with adjustable pore size and application thereof

A 3DOMWO3, aperture technology, applied in material resistance, tungsten oxide/tungsten hydroxide, etc., to achieve high sensitivity, high selectivity, and efficient detection

Inactive Publication Date: 2017-05-31
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, pore size is an important parameter of macroporous materials, through the adjustment of pore size, performance can be optimized, but there are few related reports

Method used

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  • Preparation method for 3DOM WO3 material with adjustable pore size and application thereof
  • Preparation method for 3DOM WO3 material with adjustable pore size and application thereof
  • Preparation method for 3DOM WO3 material with adjustable pore size and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A 3DOM WO with adjustable aperture 3 The preparation method of material comprises the following steps:

[0034] S1. Preparation of polystyrene template:

[0035] S1.1. Add 200 mL of deionized water into the four-necked flask, then add 5 mL of styrene purified by vacuum distillation into the flask, and then heat it in an oil bath, while passing Nitrogen protection gas, remove the air in the four-necked flask, when the reaction temperature reaches 70 °C, add 0.15 g K 2 S 2 o 8 , reacted for 8 h, after the reaction, the polystyrene mother liquor with a particle size of 340 nm was obtained;

[0036] S1.2. Ultrasonicate the polystyrene mother liquor for 10 min to obtain a uniform emulsion, then centrifuge at 3000 rpm for 10 h, and then place it in a 60°C oven for 12 h to obtain a polystyrene template;

[0037] S2. Dissolve ammonium tungstate in 30 wt% hydrogen peroxide to obtain a precursor solution with a concentration of 2.4 mol / L in terms of tungsten. Immerse the pol...

Embodiment 2

[0040] The difference from Example 1 is that the concentration of the precursor solution in S2 is 4.8 mol / L.

Embodiment 3

[0042] The difference from Example 1 is that the concentration of the precursor solution in S2 is 9.6 mol / L.

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Abstract

The invention belongs to the technical field of functional material preparation and especially discloses a preparation method for a 3DOM WO3 material with an adjustable pore size and an application thereof. The preparation method comprises the following steps: S1) preparing a polystyrene template; S2) dissolving ammonium tungstate in hydrogen peroxide, thereby obtaining a 2.4-19.2mol / L precursor solution, and then soaking the polystyrene template obtained in the step S1) into the precursor solution, soaking for 6-8h and then drying, thereby obtaining a template-precursor mixture; S3) performing calcining treatment on the mixture obtained in the step S2) and removing the template, thereby obtaining the 3DOM WO3 material. The 3DOM WO3 material prepared according to the invention can be used for detecting acetone gas. Compared with a commodity, the prepared 3DOM WO3 material can realize efficient detection for the acetone gas. According to the invention, high sensitivity, high selectivity and excellent response recovery characteristic are organically combined and the preparation method for a tungsten oxide material with high sensitivity and selectivity to low-concentration acetone gas is provided.

Description

technical field [0001] The invention belongs to the technical field of preparation of functional materials, in particular to a 3DOM WO with adjustable aperture 3 Preparation methods of materials and their applications. Background technique [0002] Acetone is an important industrial organic solvent widely used in plastics, rubber, spray paint and other industries; at the same time, acetone can also be used as a raw material for the synthesis of enone, acetic anhydride, methyl methacrylate and other compounds. However, acetone is volatile, and inhalation of acetone can cause headaches, fatigue, and even coma, and seriously damage the human nervous system. Therefore, it is of great significance to monitor the acetone concentration in the workplace in real time. In addition, acetone is also considered as a biomarker of diabetes. By detecting the concentration of trace acetone in breath, it can provide a basis for the diagnosis and monitoring of diabetes. Therefore, it is nec...

Claims

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Application Information

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IPC IPC(8): C01G41/02G01N27/12
CPCC01G41/02C01P2002/72C01P2004/03C01P2004/04C01P2006/16G01N27/12
Inventor 要红昌刘志强申小清李中军
Owner ZHENGZHOU UNIV
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