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Gas-sensitive nano material based on carbon particle modified mesoporous iron oxide nanorod structure as well as preparation process and application of gas-sensitive nano material

A technology of nano-iron oxide and preparation process, which is applied in the direction of nanotechnology, iron oxide, iron oxide/iron hydroxide, etc. for materials and surface science, which can solve problems such as human health damage, and achieve long-term stability and service life Improvement, chemical stability and thermal stability, high production efficiency

Active Publication Date: 2020-11-03
FUDAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, excessive inhalation of acetone gas will inhibit the central nervous system of the human body and cause damage to human health. Therefore, the realization of micro-sensing of acetone is of great significance in the field of environmental monitoring.

Method used

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  • Gas-sensitive nano material based on carbon particle modified mesoporous iron oxide nanorod structure as well as preparation process and application of gas-sensitive nano material
  • Gas-sensitive nano material based on carbon particle modified mesoporous iron oxide nanorod structure as well as preparation process and application of gas-sensitive nano material
  • Gas-sensitive nano material based on carbon particle modified mesoporous iron oxide nanorod structure as well as preparation process and application of gas-sensitive nano material

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Experimental program
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Embodiment 1

[0037] (1) Add 0.32 g of F127 and 0.358 g of ferric chloride hexahydrate into 30 mL of deionized water and mix well to obtain mixed solution A;

[0038] (2) After stirring the mixed solution A prepared in step (1) for 1 hour, inject 1.2mL of anhydrous acetic acid to obtain the mixed solution B;

[0039] (3) After stirring the mixed solution B prepared in step (2) for 1 hour, add 0.12 g of 2-aminoterephthalic acid solid to obtain mixed solution C;

[0040] (4) After stirring the mixed solution C prepared in step (3) for 2 hours, pour it into a hydrothermal kettle as a precursor solution, and conduct a solvothermal reaction at 110°C for 24 hours. After completion, wash it with ethanol several times and dry it. , to obtain the self-sacrificing template material Fe-MOF nanorods, and its SEM characterization is as follows figure 2 As shown, it can be seen that the average diameter of Fe-MOF nanorods is about 86nm, and the average length is about 540nm;

[0041] (5) After the self-...

Embodiment 2

[0046] Similar to Example 1, the difference is that the calcination temperature in one-step calcination is 350°C. The SEM characterization of the obtained carbon particle-modified mesoporous iron oxide nanorods is shown in Figure 7 As shown, the average diameter of mesoporous iron oxide nanorods is about 52 nm, the average length is about 436 nm, the average diameter of mesoporous particles is about 5 nm, and the average diameter of carbon particles is about 5 nm. , the average diameter and average length of the carbon particle-modified mesoporous iron oxide nanorods obtained by calcination are correspondingly shortened, the mesopore size is increased, while the average size of carbon particles is reduced and the surface distribution concentration is reduced. . The carbon particle-modified mesoporous iron oxide nanorods calcined at 350 °C were also tested for acetone gas sensing performance, and the results are as follows: Figure 8 As shown, although its response is slight...

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Abstract

The invention discloses a gas-sensitive nano material based on a carbon particle modified mesoporous iron oxide nanorod structure as well as a preparation process and application of the gas-sensitivenano material. A template material FeMOF nanorod prepared by a solvothermal method is subjected to a one-step calcining process by adopting a self-sacrificing template method, so that the carbon particle modified mesoporous iron oxide nanorod heterostructure is obtained. The preparation method of the material has the advantages of being low in cost, simple in synthesis process, high in preparationefficiency, capable of achieving large-scale production and the like. The prepared heterogeneous gas-sensitive nano material can realize ultra-sensitive and high-selectivity detection of ppb-grade trace acetone gas, can be widely applied to monitoring of gas leakage and emission in chemical industry, laboratories and the like, can realize screening of type I diabetes mellitus when being applied to detection of exhaled breath of human bodies, and is applied to the fields of environmental detection and medical treatment and health.

Description

technical field [0001] The invention relates to the technical field of semiconductor nanomaterial preparation and gas sensing application, and specifically refers to a gas-sensing nanomaterial based on a mesoporous iron oxide nanorod structure modified by carbon particles, a preparation process and its application. Background technique [0002] In recent years, gas sensing technology has played an important role in various fields such as toxic gas detection, environmental monitoring, smoke alarm, automobile exhaust emission control, and smart home. With the rapid development of nanoscience and nanotechnology, designing porous heterogeneous metal oxide nanomaterials with high specific surface area and high porosity as gas sensing materials has become a research hotspot in the field of gas sensing. At the same time, chemical resistive gas sensors based on semiconductor metal oxide nanomaterials have the advantages of low cost, good stability, simple manufacturing process, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/06C01B32/15G01N27/12B82Y30/00B82Y40/00
CPCC01G49/06C01B32/15G01N27/127B82Y30/00B82Y40/00C01P2004/16C01P2004/03C01P2004/04
Inventor 卢红亮朱立远袁凯平
Owner FUDAN UNIV
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