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Gas-sensing nanomaterials based on carbon particle-modified mesoporous iron oxide nanorod structure, preparation process and application

An iron oxide nanometer and nanomaterial technology, which is applied in the field of semiconductor nanomaterial preparation and gas sensing applications, can solve problems such as damage to human health, achieve long-term stability and improve service life, overcome the high complexity of the preparation process, and improve the response. /restore speed effect

Active Publication Date: 2022-07-22
FUDAN UNIV
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  • Summary
  • 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-sensing nanomaterials based on carbon particle-modified mesoporous iron oxide nanorod structure, preparation process and application
  • Gas-sensing nanomaterials based on carbon particle-modified mesoporous iron oxide nanorod structure, preparation process and application
  • Gas-sensing nanomaterials based on carbon particle-modified mesoporous iron oxide nanorod structure, preparation process and application

Examples

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Effect test

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 1.2 mL of anhydrous acetic acid to obtain a mixed solution B;

[0039] (3) After stirring the mixed solution B prepared in step (2) for 1 hour, 0.12 g of 2-aminoterephthalic acid solid was added to obtain a 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, conduct solvothermal reaction at 110 ° C for 24 hours, wash it with ethanol for several times and blow dry after completion. , the self-sacrificial template material Fe-MOF nanorods were obtained, and the SEM characterization images are as follows figure 2 It can be seen that the Fe-MOF nanorods have an average diameter of about 86 nm and an average length of about 540 nm;

[0041] (5) ...

Embodiment 2

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

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Abstract

The invention discloses a gas-sensing nanomaterial based on a carbon particle-modified mesoporous iron oxide nanorod structure, a preparation process and an application thereof. The present invention adopts a self-sacrificial template method to perform a one-step calcination process on the template material Fe-MOF nanorod prepared by a solvothermal method, and obtains a carbon particle-modified mesoporous iron oxide nanorod heterostructure. The material preparation method of the invention has the advantages of low cost, simple synthesis process, high preparation efficiency and large-scale production. The prepared heterogeneous gas-sensing nanomaterials can achieve ultra-sensitive and highly selective detection of ppb-level trace acetone gas, which can not only be widely used in the monitoring of gas leakage and emission in the chemical industry and laboratories, but also in the detection of human exhaled breath. Realize the screening of type I diabetes, and apply it to the fields of environmental testing and medical health.

Description

technical field [0001] The invention relates to the technical field of semiconductor nano-material preparation and gas sensing application, in particular to a gas-sensing nano-material based on a carbon particle-modified mesoporous iron oxide nanorod structure, a preparation process and an application thereof. 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, vehicle exhaust emission control and smart home. With the rapid development of nanoscience and nanotechnology, the design of 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, chemiresistive gas sensors based on semiconductor metal oxide nanomaterials have the advantages of low cost, good stability, simple manufacturing process, and large-sca...

Claims

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Application Information

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Patent Type & Authority Patents(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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