A method for preparing a salt-assisted refined tin dioxide-ferroferric oxide composite material, a product thereof and applications thereof

By employing a salt-assisted refinement method for preparing SnO2-Fe2O3 gas sensing materials, the problems of particle agglomeration and low charge separation efficiency were solved, resulting in sensor performance with high specific surface area and fast response, suitable for environmental monitoring and industrial safety.

CN122355334APending Publication Date: 2026-07-10XINXIANG MEDICAL UNIV
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XINXIANG MEDICAL UNIV
Filing Date
2026-04-13
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

Existing SnO2-Fe2O3 gas sensing materials suffer from problems such as particle agglomeration, limited specific surface area, low charge separation efficiency, and slow response speed, which affect the sensitivity and selectivity of the sensor.

Method used

A salt-assisted refining preparation method was adopted to prepare Fe-MOF precursors through solvothermal reaction, and SnO2 was in-situ embedded to form heterojunctions. Water-soluble salts such as NaCl were used as isolation templates during calcination to inhibit particle agglomeration, thus forming SnO2-Fe2O3 composite materials with high dispersion and high specific surface area.

Benefits of technology

It significantly improves the charge separation efficiency and gas contact area of ​​the material, enhances the sensor's response sensitivity, selectivity, and response/recovery speed, and reduces the operating temperature, making it suitable for environmental monitoring and industrial safety.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN122355334A_ABST
    Figure CN122355334A_ABST
Patent Text Reader

Abstract

The application discloses a preparation method of a salt-assisted refined tin dioxide-iron trioxide (SnO2-Fe2O3) composite material and a product and application thereof, and belongs to the technical field of SnO2-Fe2O3 gas sensors. The preparation method comprises the following steps: taking soluble ferric salt and terephthalic acid as raw materials, and preparing a Fe-MOF precursor through a solvothermal reaction; in-situ embedding SnO2 to form a heterojunction by taking the Fe-MOF precursor as a template; and then realizing the refinement and dispersion of material particles through salt-assisted calcination, so as to finally obtain the SnO2-Fe2O3 composite material. The material inherits the high specific surface area and porous structure of the MOF-derived material, SnO2 and Fe2O3 form a stable n-n heterojunction, and the salt-assisted technology effectively inhibits particle agglomeration. The material exhibits excellent sensing performance of high sensitivity, fast response / recovery speed, low working temperature, good selectivity and strong cycle stability to a target gas (isobutyl alcohol).
Need to check novelty before this filing date? Find Prior Art