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Title:
SELF-HEATING GAS SENSOR, GAS-SENSITIVE MATERIAL, PREPARATION METHOD FOR SAME, AND APPLICATIONS THEREOF
Document Type and Number:
WIPO Patent Application WO/2021/203804
Kind Code:
A1
Abstract:
A gas-sensitive material, a preparation method for same, applications thereof, and a gas sensor using the gas-sensitive material. The gas-sensitive material is a carbon material-metal oxide composite nanomaterial formed by compounding a carbon material and metal oxides, the content of the carbon material in the carbon material-metal oxide composite nanomaterial is 0.5-20 weight%, the content of the metal oxides is 80-99.5 weight%, the metal oxides contain tungsten oxide and one or more selected from tin oxide, iron oxide, titanium oxide, copper oxide, molybdenum oxidy, and zinc oxide, the metal oxides are formed on the carbon material in the form of nanowires, and the nanowires are tungsten oxide-doped nanowires. The gas-sensitive material has reduced resistance, is capable of responding to various gases at a reduced working temperature, also obviates the need for external heating, implements self-heating simply by joule heating of a measuring circuit, and has reduced power consumption and increased sensitivity.

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Inventors:
AN FEI (CN)
SUN BING (CN)
LI NA (CN)
WANG LIN (CN)
SHI NING (CN)
XU WEI (CN)
ZHANG SHUCAI (CN)
WANG HAOZHI (CN)
WANG SHIQIANG (CN)
FENG JUNJIE (CN)
ZHAO CHENYANG (CN)
Application Number:
PCT/CN2021/073734
Publication Date:
October 14, 2021
Filing Date:
January 26, 2021
Export Citation:
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Assignee:
CHINA PETROLEUM & CHEM CORP (CN)
CHINA PETROLEUM & CHEMICAL CORPORATION QINGDAO RES INSTITUTE OF SAFETY ENGINEERING (CN)
International Classes:
C01B32/184; G01N27/12
Foreign References:
CN106596652A2017-04-26
CN1141433A1997-01-29
CN108398408A2018-08-14
CN107298464A2017-10-27
CN102502842A2012-06-20
CN106770476A2017-05-31
CN102531063A2012-07-04
CN101913597A2010-12-15
CN105606659A2016-05-25
GB2464516A2010-04-21
US20120161796A12012-06-28
Other References:
See also references of EP 4112547A4
Attorney, Agent or Firm:
RUNPING & PARTNERS (CN)
Download PDF:
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