Method for preparing trimethylamine gas sensor from NiO-In2O3 material with flower-shaped structure

A gas sensor, nio-in2o3 technology, applied in chemical instruments and methods, material resistance, gallium/indium/thallium compounds, etc., can solve the problems of difficult large-scale application, expensive, complex equipment, etc., and achieve low cost and good penetration The effect of stability and stability of the synthetic system

Pending Publication Date: 2022-08-02
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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Problems solved by technology

At present, methods for detecting trimethylamine include spectrophotometry, gas chromatography-mass spectrometry, ion chromatography, etc., but the equipment required in these processes is complex and expensive, and it is difficult to be applied on a large scale in practice

Method used

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  • Method for preparing trimethylamine gas sensor from NiO-In2O3 material with flower-shaped structure
  • Method for preparing trimethylamine gas sensor from NiO-In2O3 material with flower-shaped structure
  • Method for preparing trimethylamine gas sensor from NiO-In2O3 material with flower-shaped structure

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preparation example Construction

[0043] Flower-like structure NiO-In 2 O 3 The composite material preparation method includes the following steps:

[0044] Step 1: Weigh a certain amount of indium chloride tetrahydrate InC l3 ⋅4H 2 O and Ni(NO) hexahydrate 3 ) 2 ⋅6H 2 O was dissolved in a mixed solution of 30 mL of distilled water and 10 mL of absolute ethanol. After stirring with a magnetic stirrer for 30 minutes at 40 °C, an appropriate amount of sodium lauryl sulfate and urea were added to the above solution, and stirring was continued for 30 minutes. Dissolve it completely to prepare a reaction solution of hydrothermal synthesis precursor;

[0045] Step 2: Pour the precursor reaction solution obtained in Step 1 into the polytetrachloroethylene lining of a 50 mL stainless steel reactor with a filling degree of 80%; keep it in a drying box at a temperature of 160 ° C for 5 hours, and then follow the furnace Cool to room temperature to obtain the reaction product;

[0046] Step 3: centrifuging the so...

Embodiment 1

[0055] (1) Preparation of flower-like structure In 2 O 3 Material

[0056] Step 1: Weigh 0.1466 g indium chloride tetrahydrate InCl 3 ⋅4H 2 O was dissolved in a mixed solution prepared by 30 mL of distilled water and 10 mL of absolute ethanol. After continuous stirring with a magnetic stirrer for 30 minutes at 40 °C, 0.2595 g of sodium dodecyl sulfate and 1.021 g of urea were added to the above solution, and continued. Stir for 30 minutes to make it completely dissolved, and prepare a reaction solution of hydrothermal synthesis precursor;

[0057] Step 2: Pour the precursor reaction solution obtained in Step 1 into the polytetrachloroethylene lining of a 50 mL stainless steel reactor, and the filling degree is 80% sealed;

[0058] Step 3: place the reaction kettle of Step 2 in a drying box and keep it at a temperature of 160°C for 5 hours, then cool down to room temperature with the furnace to obtain a reaction product;

[0059] Step 4: centrifuging the solution after the...

Embodiment 2

[0066] (1) Preparation of flower-like structure NiO-In 2 O 3 composite material

[0067] Step 1: Weigh 0.1466 g indium chloride tetrahydrate InCl 3 ⋅4H 2 O and 0.0044 g nickel nitrate hexahydrate (NO 3 ) 2 ⋅6H 2 O was dissolved in a mixed solution prepared by 30 mL of distilled water and 10 mL of absolute ethanol. After continuous stirring with a magnetic stirrer for 30 minutes at 40 °C, 0.2595 g of sodium dodecyl sulfate and 1.021 g of urea were added to the above solution, and continued. Stir for 30 minutes to make it completely dissolved, and prepare a reaction solution of hydrothermal synthesis precursor;

[0068] Steps two, three, four, five, and six are the same as in Example 1.

[0069] (2) Flower-like structure NiO-In 2 O 3 Structural Characterization of Composite Materials

[0070] The crystal structure of the product was characterized by XRD powder diffractometer (XRD, PANalytical X'Pert Pro). figure 1 X-ray diffraction (XRD) pattern of the sample. It can...

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Abstract

The invention discloses a method for preparing a trimethylamine gas sensor from a flower-shaped NiO-In2O3 material, and relates to a method for preparing a sensor from a composite material, and the gas sensor is composed of an alumina ceramic tube, a nickel-cadmium alloy heating wire, a platinum wire, a gold electrode and a NiO-In2O3 composite sensitive material. A simple one-step hydrothermal method is adopted, the optimal loading capacity and the optimal composite structure of the In2O3 surface are finally determined by adjusting the molar content of the nickel source in the composite material, and the method has the advantages of being simple in preparation process, low in cost, environmentally friendly and suitable for industrial production. The NiO-In2O3 composite material with the flower-like structure prepared by the invention shows good sensitive characteristic in trimethylamine gas detection, has the advantages of higher sensitivity, good reproducibility and stability, high selectivity, lower detection limit and the like, and is simple in synthesis method, low in cost, small in size, suitable for industrial mass production and wide in application prospect. Wide application prospects are shown in the field of high-performance gas sensors.

Description

technical field [0001] The invention relates to a method for preparing a sensor from a composite material, in particular to a flower-like structure NiO-In 2 O 3 Materials and methods for preparing trimethylamine gas sensor. Background technique [0002] Indium oxide (In 2 O 3 ) is a wide-bandgap semiconductor material that has been widely used in photocatalysis, solar cells, liquid crystal displays, and thin-film transistors due to its simple synthesis method, excellent electrical conductivity, and photoelectrochemical stability. In recent years, In 2 O 3 Due to its high catalytic activity and easy construction of microstructures, more and more attention has been paid to its application in the field of gas sensors. In order to meet the needs of gas detection, various morphologies of In 2 O 3 It has been used in gas sensor research such as nanowires, nanosheets, nanoflowers and hollow tube structures. In these structures, flower-like In 2 O 3 The microporous struct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/12C01G53/04C01G15/00B82Y40/00B82Y30/00B82Y15/00
CPCG01N27/127C01G53/04C01G15/00B82Y40/00B82Y30/00B82Y15/00C01P2004/45C01P2004/82C01P2002/72C01P2004/03
Inventor 孟丹寇博深耿新雨李秀秀尤昭玮许划耿
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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