Abstract
Monitoring and control of hazardous gases have been a top concern because they lead to serious public health issues, such cardiovascular diseases, respiratory illnesses, central nervous system abnormalities and other illnesses. These gases are also linked to global warming, which affects the surrounding environment. Therefore, harmful emissions should be limited and neutralised. Traditional gas sensors have slow speed, expensive operation, labour and capital intensive and invasive. Scholars need to develop an inexpensive, rapid, efficient, highly sensitive, portable sensors with a low power consumption and a high level of reliability. In this study, multi-walled carbon nanotubes (MWCNTs) were synthesised using plant byproducts. TEM, FE-SEM and AFM were employed to identify MWCNTs. Gas test showed that the sensor had high sensitivity levels of 5.6 and 8.8 and response times as low as 24.3 and 21.6 s for H2S and NO2, respectively.
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