Abstract
• Carbonized Mn-doped ZIF67 electrocatalytically detects two groups on o-nitrophenol. • Broad linear range of 0.5–100 μM and LOD of 0.16 μM for o-nitrophenol measurement. • Recovery from real water samples w/ added o-nitrophenol exceeded that of UV method. The zeolitic imidazolate framework ZIF-67 can be used as a favorable catalyst carrier owing to its unique structure. Although the catalytic activity of ZIF-67 can be considerably improved by doping with transition metals such as manganese, manganese-doped ZIF-67 has rarely been applied in electrocatalysis. In this study, manganese-doped ZIF-67 was carbonized to form CoC@Mn and to prepare an electrochemical sensor for detecting o -nitrophenol ( o- NP). The results showed that CoC@Mn exhibits a good electrocatalytic performance. The constructed sensor possessed a linear range of 0.5–100 μM for the detection of o- NP, with a detection limit of 0.16 μM. In addition, it was found to accurately detect o- NP in real lake and tap water samples. CoC@Mn is therefore expected to be an efficient electrocatalyst for detecting o- NP as an industrial pollutant.
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