A novel electrochemical sensor based on CuO/H-C3N4/rGO nanocomposite for efficient electrochemical sensing nitrite
Journal of Alloys and Compounds(2019)
Abstract
Highly sensitive detection of nitrite has drawn considerable concern owing to their destructive effect on both human health and the environment. A simple but sensitive electrocatalytic method for nitrite determination is significantly important in its real operation. Herein, a novel electrochemical nitrite sensor is synthetized by combining CuO with H-C3N4 and reduced graphene oxide (rGO). The N-doped carbon layer derived from H-C3N4 acting as “bridge” distributes evenly on the surface of rGO substrate and tunes the growth of CuO. The H-C3N4 acting as nucleation site could combine the catalytic center (CuO) and the substrate rGO to improve the electro-catalytic properties. The CuO/H-C3N4/rGO hybrid modified glassy carbon electrode exhibits remarkable sensing ability toward nitrite with a low detection limit of 0.025 μM (S/N = 3), wide linear response ranging from 0.2 μM–110 μM and a high sensitivity of 0.093 μAμM−1.
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Key words
Nitrite determination,Electrochemical sensor,CuO/H-C3N4/rGO electrode
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