Abstract
In this communication, we report carbon nano-onions (CNOs) derived from natural oil as metal-free sensors for efficient nitrite determination. The pristine CNOs showed remarkable nitrite oxidation capability with a linear detection range of 1 μM–90 μM (R2 = 0.998), the sensitivity of 214.29 μA mM−1 cm−2 and detection limit as low as 0.75 μM. The performance of this material exceed many well studied materials used as active materials for nitrite sensor.
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