• 专利标题:   Sensor useful in detecting nitrogen dioxide for hospitals, medical facilities, medicinal manufacturing, and chemical handling industries, comprises graphene sheet positioned on substrate, and tungsten oxide nanorods doped on graphene sheet.
  • 专利号:   KR2022155002-A, KR2545324-B1
  • 发明人:   LEE K B, NAM Y, LEE S Y, LEE Y, KIM J, OH I H
  • 专利权人:   KOREA INST SCI TECHNOLOGY
  • 国际专利分类:   C01B032/194, C01G041/02, C09D001/00, G01N027/12, G01N033/00
  • 专利详细信息:   KR2022155002-A 22 Nov 2022 G01N-027/12 202202 Pages: 20
  • 申请详细信息:   KR2022155002-A KR062684 14 May 2021
  • 优先权号:   KR062684

▎ 摘  要

NOVELTY - Sensor (10) comprises a substrate (11); a graphene sheet (12) positioned on the substrate; and tungsten oxide nanorods (13) doped on the graphene sheet. USE - The sensor is useful in detecting nitrogen dioxide (claimed) for hospitals, medical facilities, medicinal manufacturing and related industries, and chemical handling industries. ADVANTAGE - The sensor detects nitrogen dioxide gas within 150 seconds at 20-35?Oc; has very high sensitivity and selectivity to nitrogen dioxide gas; has detection limit of ≤ 0.5 ppm; has very short reaction time to nitrogen dioxide gas and excellent correlation coefficient and quantitative curve, so it is very suitable for real-time nitrogen dioxide gas detection and quantification is possible; can be produced in simple and efficient manner; and detects nitrogen dioxide gas in wide range of fast response speed and low concentration of 0-10 ppm and high concentration of 10-100 ppm. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: producing sensor for detecting nitrogen dioxide gas, comprising (a) preparing solution containing tungsten oxide nanorods, and (b) doping solution containing the tungsten oxide nanorods on top of the graphene sheet; and ystem for detecting nitrogen dioxide gas comprising sensor, a chamber, a control and recording devices, flow control device, and a gas supply. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the sensor for detecting nitrogen dioxide. 10Sensor 11Substrate 12Graphene sheet 13Tungsten oxide nanorods