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Preparation method of hydrogen sulfide gas sensor material with biomass-loaded inorganic particles as well as product and application thereof

An inorganic particle, gas sensing technology, applied in inorganic chemistry, chemical instruments and methods, nanotechnology for materials and surface science, etc., can solve the problems of reduced device life, high cost, and high operating temperature

Active Publication Date: 2018-04-06
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are many methods for testing hydrogen sulfide, which generally have high cost, and high working temperature will reduce the life of the device.

Method used

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  • Preparation method of hydrogen sulfide gas sensor material with biomass-loaded inorganic particles as well as product and application thereof
  • Preparation method of hydrogen sulfide gas sensor material with biomass-loaded inorganic particles as well as product and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh 0.05mol and 0.025mol of ferric chloride and cobalt chloride precursors and dissolve them in 100ml of deionized water and stir evenly at 300rpm to obtain solution A; continue to weigh 0.2mol of sodium hydroxide and dissolve in 100ml of deionized water and stir to dissolve Obtain solution B; add solution B dropwise to solution A with constant stirring and heat to 90 o C reacts for 30min to obtain CoFe 2 O 4 After centrifugation, washing and drying, the sediment is collected for 5 o C / min heating up to 500 o C, the nano-powder that naturally cools down after heat preservation for 2h, see figure 1 The nano CoFe prepared in Example 1 2 O 4 Scanning electron microscope photos.

[0023] Weigh 9g of modified starch granules and dissolve them in deionized water, add 0.5g of glycerin after complete dissolution, and continuously stir until clear, then add 0.5g of CoFe 2 O 4 In an organic solution, and then form a film on the spin coater, the excess water is 60 o C is evaporated i...

Embodiment 2

[0025] Weigh 0.05mol and 0.025mol of ferric chloride and cobalt chloride precursors and dissolve them in 100ml of deionized water and stir evenly at 300rpm to obtain solution A; continue to weigh 0.2mol of sodium hydroxide and dissolve in 100ml of deionized water and stir to dissolve Obtain solution B; add solution B dropwise to solution A with constant stirring and heat to 90 o C reacts for 30min to obtain CoFe 2 O 4 After centrifugation, washing and drying, the sediment is collected for 5 o C / min heating up to 500 o C, Nano powder that naturally cools down after 5 hours of heat preservation, see figure 1 .

[0026] Weigh 9g of modified starch granules and dissolve them in deionized water, add 0.5g of glycerin after complete dissolution, and continuously stir until clear, then add 0.5g of CoFe 2 O 4 In the organic solution, then the film is formed on the spin coater, the excess water is 80 o C is evaporated in vacuum to obtain a 200μm film. The obtained film was glued to the hexa...

Embodiment 3

[0028] Weigh 0.1 mol and 0.05 mol of the precursors of ferric chloride and cobalt chloride and dissolve them in 100 ml of deionized water and stir evenly at 300 rpm to obtain solution A; continue to weigh 0.45 mol of sodium hydroxide and dissolve in 100 ml of deionized water and stir to dissolve Obtain solution B; add solution B dropwise to solution A with constant stirring and heat to 90 o C reacts for 30min to obtain CoFe 2 O 4 After centrifugation, washing and drying, the sediment is collected for 5 o C / min heating up to 500 o C, the nanopowder that naturally cools down after holding for 3.5 hours, see figure 1 .

[0029] Weigh 8.5g of modified starch granules and dissolve them in deionized water, add 0.5g of glycerin after complete dissolution, and continue stirring until clear, and then add 1g of CoFe 2 O 4 In an organic solution, and then form a film on the spin coater, the excess water is at 70 o C evaporated in vacuum to obtain a 150μm film. The obtained film was glued to ...

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Abstract

The invention discloses a preparation method of a hydrogen sulfide gas sensor material with biomass-loaded inorganic particles as well as a product and application thereof. According to the preparation method, an iron salt and a cobalt salt which are water-soluble are used as precursors, and an OH-containing precipitation agent is added, and the solution is centrifuged and spinel structure CoFe2O4inorganic nanometer particles are collected; biodegradable starch is dissolved in water and mixed with the inorganic particles to form an organic film embedded with inorganic particles; and the organic material has a porous structure, and can realize capture of a large amount of hydrogen sulfide gas, and then the gas sensitive reaction of adsorption and desorption is performed on the CoFe2O4. According to the preparation method of the hydrogen sulfide gas sensor material with the biomass-loaded inorganic particles, a flexible gas-sensitive thin film can be prepared, the operation is simple, and the controllability is high; and the flexible gas-sensitive thin film is used for hydrogen sulfide gas detection.

Description

Technical field [0001] The invention relates to a hydrogen sulfide gas sensor, in particular to a method for preparing a hydrogen sulfide gas sensor material with inorganic particles loaded on biomass, and its products and applications, in particular to a flexible sensor material with inorganic nanoparticles embedded in an organic film . Background technique [0002] The development of modern industry has caused serious air pollution, which poses a great threat to human health and the ecological environment. Hydrogen sulfide gas is one of the pollutants, mainly from oil / gas drilling and refining, sewage treatment, papermaking and landfilling. Low-concentration hydrogen sulfide gas will endanger health, so the ppm level detection at the work site, especially in the refinery, is particularly important. [0003] At present, there are a variety of testing methods for hydrogen sulfide, which are generally costly. In addition, high operating temperature will reduce the life of the devi...

Claims

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Application Information

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IPC IPC(8): C08L3/02C08K3/22C08K5/053C08J5/18C01G51/00B82Y30/00B01D53/02G01N27/12
CPCB01D53/02B01D2257/304B82Y30/00C01G51/00C01P2004/03C08J5/18C08J2303/02G01N27/127
Inventor 何丹农张芳葛美英吴晓燕段磊章龙李敏金彩虹
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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