Ordered mesoporous carbon provoked dimensionally varied molybdenum dichalcogenide: A striking sensing matrix for electrochemical detection of hydrazine

Abstract

Rational design and construction of two-dimensional transition metal dichalcogenides (TMDs) with minimal size are vital for improving the sensitivity and selectivity of the electrochemical sensors. Here we demonstrated a vast surface triggered size reduced MoS2 formation on ordered mesoporous carbon (OMC) support. The OMC support material was synthesized through hard templating approach using mesoporous silica SBA-15. Subsequently, the MoS2-OMC nanocomposite material was obtained through hydrothermal route. The structural properties of the prepared materials prove the existence of a well-defined mesoporous nature of carbon and flower-like MoS2 on the surface of OMC. The developed MoS2-OMC composite was deployed as a sensing matrix for the detection of hydrazine in neutral medium. The electrochemical results illustrated that the prepared composite materials exhibited excellent activity towards hydrazine detection with a wide linear detection range (1–9 µM) and very low detection limit of 0.4 µM with a sensitivity of 0.25 µA/µM respectively.