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MWCNT-based material as a gas sensor for H 2 and characterisation
(Inorganic Chemistry Communications, 2023) Yasser Naji Ahmed; Mohammed faiad naief; Samar Naser Mohammed; Ahmed Mishaal Mohammed
In this study, waste oil was used to produce multi-walled carbon nanotubes (MWCNTs). TEM, FE-SEM and AFM techniques were used to characterise MWCNTs. In addition, the sizes of the synthesised MWCNTs ranged from 28.3 to 49.51 nm. The FTIR technique was used to prove the production of MWCNTCOO. The produced MWCNTCOO were evaluated as gas sensors for H 2 The higher H 2 S and NO 2 ◦ S sensitivity response was recorded at 70 gases at various temperatures and time intervals. C, with a response of 10.6, meanwhile, the greater NO sensitivity response was observed at 190 ◦ C, with a response of 29.9. At 25 ◦ 2 C, the response and recovery times for 100 ppm H 2 ◦ S gas were 18.9 and 96.3 s, respectively, whereas, at 100 C, they were 28.8 and 85.5 s, respectively, thereby demonstrating that the sensor has unique response recovery features