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Author: search.filters.author.Yasser Naji AhmedSubject: search.filters.subject.Fullerene Liquid asphalt H2S and NO2 gas sensor

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    Novel preparation method of fullerene and its ability to detect H2S and NO2 gases
    (Results in Chemistry, 2023) Mohammed Faiad Naief; Samar Naser Mohammed; Yasser Naji Ahmed; Ahmed Mishaal Mohammed; Sura Naser Mohammed
    In this study, a new system for fullerene preparation was designed based on the incomplete combustion of liquid asphalt. Transmission electron microscopy, field emission scanning electron microscopy and energy-dispersive X- ray (EDX) techniques were used to characterise fullerene. The sizes of the synthesised fullerene ranged from 48.20 nm to 73 nm. The EDX technique was used to determine the amounts of elements in a component, thereby revealing the formation of fullerene. The produced fullerene was evaluated as a gas sensor for H2S and NO2 gases at various temperatures and time intervals. The sensitivity of the gas sensor decreased with the increased operating temperature reaching 150 ◦C. Then, the sensitivity increased as the temperature increased. The maximum gas sensitivities for NO2 and H2S were 72.86% at 25 ◦C and 75.89% at 200 ◦C, respectively.