Simultaneous Determination of Nitrophenol Isomers Based on β‐Cyclodextrin Functionalized Reduced Graphene Oxide |
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| Authors: | Zhaona Liu Xuemei Ma Huacheng Zhang Weijie Lu Houyi Ma Shifeng Hou |
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| Institution: | 1. Key Laboratory for Colloid and Interface Chemistry of State Education Ministry, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, P.R. China;2. Department of Chemistry and Biochemistry, Montclair State University, Montclair, NJ 07043, USA |
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| Abstract: | β‐CD modified reduced graphene oxide (RGO) sheets have been prepared and characterized by TEM, AFM, IR, EIS and CVs. In comparison with bare glass carbon electrode (GCE) and RGO modified GCE, CD‐RGO/GCE showed much higher peak currents to the reduction of nitrophenol isomers (NPs), attributed to the larger specific surface area of RGO and high quantities of host–guest recognition sites. Three pairs of redox peaks are observed on the CVs of CD‐RGO for p‐NP (0.3 V), o‐NP (?0.2 V) and m‐NP (0.05 V), separating well with each other. Under the optimized condition, the anodic peak currents were linear over ranges around 1–10 mg dm?3 for p‐NP, 1–9 mg dm?3 for o‐NP and 1–6 mg dm?3 for m‐NP, with the detection limits of 0.05 mg dm?3, 0.02 mg dm?3 and 0.1 mg dm?3, respectively. Thus, the CD‐RGO is expected to be a promising sensor material for detecting trace NPs in waste water. |
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| Keywords: | Reduced graphene oxide (RGO) Nitrophenol isomers (NPs) Cyclic voltammograms (CVs) Cyclodextrin (CD) Selective detection |
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