α-fe 2 o 3 Fabrication of nano-microsphere hydrogen sulfide sensitive materials and components

A technology of nano-microspheres and hydrogen sulfide, which is applied in the fields of analysis of materials, material resistance, nanotechnology, etc., can solve the problems of large amount of ionic liquid and high preparation cost, and achieve uniform morphology, good dispersibility, synthesis and post-processing methods. simple effect

Active Publication Date: 2021-02-02
QIQIHAR UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As far as ionic liquids are concerned, the amount of ionic liquids used in the preparation of nanomaterials is large, and the high cost of preparation is another problem that needs to be improved urgently.

Method used

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  • α-fe <sub>2</sub> o <sub>3</sub> Fabrication of nano-microsphere hydrogen sulfide sensitive materials and components
  • α-fe <sub>2</sub> o <sub>3</sub> Fabrication of nano-microsphere hydrogen sulfide sensitive materials and components
  • α-fe <sub>2</sub> o <sub>3</sub> Fabrication of nano-microsphere hydrogen sulfide sensitive materials and components

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Embodiment Construction

[0022] First add 2.0 mmol FeCl 3 ·6H 2 O and 0.05-0.1 mmol [C 12 mim][PF 6 ] mixed and dissolved in 35 mL of water, and magnetically stirred for 60 min; the resulting mixture was transferred to a 30-50 mL stainless steel self-pressurized reactor with a polytetrafluoroethylene liner, sealed, and kept at 150-210 °C React for 8-12 hours. Naturally cooled to room temperature and centrifuged to obtain a red iron oxide precursor.

[0023] The precursor was washed several times with ultrapure water and ethanol, and then dried in vacuum at 80 °C for 12 hours. The scanning electron microscope image of the powder is as follows: Figure 1-2 shown. It can be seen from the figure that the precursor is a monodisperse nanosphere with a diameter of about 2 μm, and a rough spherical structure formed by self-assembly and accumulation of nanoparticles with a particle size of 20-100nm.

[0024] The XRD patterns obtained after the precursors were heat-treated at 250, 400 and 600 °C for 2 hou...

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Abstract

The invention discloses a α-Fe 2 o 3 Nano microsphere hydrogen sulfide gas sensitive material and the preparation method of gas sensitive element, with FeCl 3 ·6H 2 O is the raw material, [C 12 -2-C 12 im]Br 2 As an auxiliary reagent, it was reacted in a stainless steel self-pressurized reactor at 150-210°C for 8-12 h by hydrothermal method, cooled naturally to room temperature and then centrifuged. The product was washed several times with ethanol and ultrapure water, and vacuum-dried to obtain α ‑Fe 2 o 3 nanospheres. α‑Fe 2 o 3 The precursor was calcined at 250 °C for 2 h to obtain α‑Fe with a porous structure 2 o 3 Nano microsphere hydrogen sulfide gas sensitive material. The beneficial effect of the present invention is to adopt ionic liquid type Gemini imidazole surfactant ([C] for the first time 12 -2-C 12 im]Br 2 ) assisted in the synthesis of α-Fe with self-assembled porous structure 2 o 3 The nano-microsphere hydrogen sulfide gas-sensing material has opened up a new way for the development and real-time detection of harmful gas gas-sensing new materials.

Description

technical field [0001] The present invention relates to a kind of α-Fe 2 o 3 The nano microsphere hydrogen sulfide gas sensitive material, and the invention also relates to a method for making a gas sensitive element by using the gas sensitive material. Background technique [0002] Hydrogen sulfide (H 2 S) is a flammable, soluble and highly toxic gas. After inhalation, it can pass through the cell membrane and combine with iron in mitochondrial cytochrome enzymes to form a complex, which will block the respiration of cells and cause acute poisoning and chronic damage. Low concentrations of hydrogen sulfide in industrial production not only endanger the lives of workers but also cause explosions. Therefore, realizing the early identification and real-time detection of hydrogen sulfide gas is an important means to ensure personal safety and prevent industrial accidents. [0003] At present, the common detection methods of hydrogen sulfide gas include chromatography, spect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/12C01G49/06B82Y40/00
CPCB82Y40/00C01G49/06C01P2002/72C01P2004/03C01P2004/32C01P2004/45C01P2004/61C01P2004/64G01N27/127
Inventor 王平于海霞徐蕾隋丽丽郭祥峰贾丽华
Owner QIQIHAR UNIVERSITY
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