Abstract

Gas sensor based on nanostructured tin oxide (SnO2) and multi-walled carbon nanotube (MWCNT) composite material has successfully been synthesized. Reflux method was used to produce SnO2-MWCNT powder with various ratio 1:0, 4:1, 2:1, 1:1 and 0:1. The XRD result shows that the synthesized material comprises of the combination of carbon elements (MWCNT) and SnO2 of the crystalite cassiterite phase. BET analysis shows that MWCNT particles increase the specific surface area of SnO2 particles. SEM images show the morphology of the SnO2 nanoparticle composite attached to the MWCNT wall with a diameter of 40-60 nm and dispersed around it. Gas sensor testing was carried out at room temperature, 50, 100, 150, 200, 250, 300, and 350°C. All sensor samples were exposed to 30 ppm CO gas for 15 minutes. . It was found that sample with 1:0 ratio gives the best response with 98.91% at 350°C. CO gas tests have also been carried out at various concentration 10, 30, 50 and 70 ppm to 4:1 SnO2-MWCNT sample at 150°C. The higher the CO gas concentration, the greater the response. SnO2-MWCNT with 4:1 ratio at 50°C has the fastest response time of 10 s and the fastest recovery time of 3 s.

Full Text
Paper version not known

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.