Method for preparing zinc-doped iron trioxide composite structure gas-sensitive element

A technology of ferric oxide and gas sensor, which is applied in the direction of measuring devices, instruments, and material analysis through electromagnetic means, which can solve the problems of low sensitivity, long response recovery time, poor selectivity, etc., and achieve good thermal stability, Improved sensitivity and response recovery time, easy to prepare effects

Inactive Publication Date: 2017-05-31
FUZHOU UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

However, the conventional single α-Fe 2 o 3 Semiconductor sensitive materials have disadvantages such as low sensitivity, poor selectivity, and long response recovery time.

Method used

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  • Method for preparing zinc-doped iron trioxide composite structure gas-sensitive element
  • Method for preparing zinc-doped iron trioxide composite structure gas-sensitive element
  • Method for preparing zinc-doped iron trioxide composite structure gas-sensitive element

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0029] (1) Weigh 0.4973g (1.84mmol) ferric chloride hexahydrate, 0.2510g (1.84mmol) anhydrous zinc chloride and 0.3057g (1.84mmol) terephthalic acid into a beaker;

[0030] (2) Measure 80 mL of N,N-dimethylformamide into a beaker, and stir evenly at room temperature for 10 minutes;

[0031] (3) After the reactants are completely dissolved, put the obtained clear solution into the lining of a 100mL autoclave, and place it in an oven at 150°C for 2 hours;

[0032] (4) After the reaction, the precipitate was centrifuged, washed and dried to obtain Zn-doped MIL-88B nano-spindle powder. Finally, the product was placed in a muffle furnace and calcined in an air atmosphere at 500 °C for 2 h, and finally Zn-doped α-Fe was obtained. 2 o 3 Nanocomposite powder;

[0033] (5) Weigh 5-10 mg of the nanocomposite powder obtained in step (4), add 1 drop of terpineol and grind it evenly, then spread it evenly on the ceramic tube, dry it naturally and place it in a muffle furnace, at 300 si...

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Abstract

The invention discloses a method for preparing a zinc-doped iron trioxide composite structure gas-sensitive element and application thereof and belongs to the field of preparation of nanometer functional materials. The gas-sensitive element is a nanocomposite material synthesized by taking MOFs as a template. The preparation method specifically comprises the following steps: preparing a Zn-doped MIL-88B nano spindle by adopting a one-step solvothermal method; performing centrifugal drying on the obtained product, calcining in an air atmosphere, and finally obtaining Zn-doped alpha-Fe2O3 nanocomposite material powder; further adding terpilenol into the obtained nano powder, uniformly grinding, smearing on a ceramic tube, sintering in a muffle furnace, thereby obtaining the gas-sensitive element. The gas-sensitive element has the gas-sensitive characteristics of low concentration detection, fast response, high stability and high selectivity and can be used for preparing semiconductor gas-sensitive sensors.

Description

technical field [0001] The invention belongs to the field of preparation of nano functional materials, and in particular relates to a preparation method of a zinc-doped ferric oxide composite structure gas sensor. Background technique [0002] With the development of human society and science and technology, people are gradually facing a problem of environmental pollution while enjoying the good life brought by science and technology. At present, the discharge of a large amount of industrial waste gas has led to the emergence of large-scale smog in the north, making the air quality worse. become a social issue. Therefore, the detection of some flammable or hazardous gases has great practical significance. [0003] Gas sensor, as a device for detecting gas, has received more and more attention. Generally speaking, gas sensors are based on the interaction between gas molecules and semiconductor nanomaterials, such as adsorption and desorption of oxygen molecules, and redox r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/12B82Y40/00
CPCB82Y40/00G01N27/127
Inventor 贾潇高平义刘荣王治伟潘海波
Owner FUZHOU UNIV
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