Enhancement Sensitivity and Selectivity of Ammonium Hydroxide Using Nitrogen-Doped Double-Walled Carbon Nanotubes
نویسندگان
چکیده
Nitrogen-doped double-walled carbon nanotubes (N-DWCNTs) were synthesized by floating catalytic chemical vapor deposition (FCCVD) at 1300 °C using ethanol and urea as nitrogen sources. For comparison, the undoped (DWCNTs) FCCVD source. Synthesized DWCNTs N-DWCNTs separately dispersed in dropped onto printed circuit board substrate. The fabricated sensors detected to ammonium hydroxide (NH4OH), acetone vapors part per million level. sensor response results show that are highly sensitive NH4OH. In case of volatile organic compounds detection, exhibit similar ethanol. from NH4OH was 4-fold higher than DWCNTs. sensing mechanism can be attributed charge transfer between molecule. Nitrogen site has a response, resulting an enhancement selectivity sensitivity total atomic percentage is approximately 0.90 at%. suggest heteroatom-doping promising approach for improving detection.
 HIGHLIGHTS
 
 method urea
 selective NH4OH
 enabled improved compared with DWCNTs
 GRAPHICAL ABSTRACT
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ژورنال
عنوان ژورنال: Trends in Sciences
سال: 2022
ISSN: ['2774-0226']
DOI: https://doi.org/10.48048/tis.2022.2891