A facile one-step synthesis of Fe2O3/nitrogen-doped reduced graphene oxide nanocomposite for enhanced electrochemical determination of dopamine

Abstract

Fe 2 O 3 /nitrogen-doped reduced graphene oxide (Fe 2 O 3 /N-rGO) was synthesized for enhanced electrochemical determination of dopamine (DA). The nanocomposite was synthesized through a facile one-step hydrothermal method, where ethylenediamine served as reducing agent, nitrogen source and coordinating agent, therefore making the reduction and nitrogen doping of GO and the formation of Fe 2 O 3 occur simultaneously. Scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction spectroscopy (XRD), fourier transform infrared spectroscopy (FTIR), Raman spectroscopy and electrochemical techniques were employed to characterize Fe 2 O 3 /N-rGO. The results showed that large numbers of Fe 2 O 3 with spindle morphology were distributed on the surface of N-rGO and the synergetic effect between Fe 2 O 3 and N-rGO made the sensor based on Fe 2 O 3 /N-rGO exhibit an excellent performance toward DA detection with a wide linear range of 0.5 μM to 0.34 mM, a high sensitivity of 418.6 μA mM-1 cm-2 and a low detection limit of 0.49 μM (S/N = 3). Moreover, the sensor also exhibited good selectivity, reproducibility and stability. Therefore, Fe 2 O 3 /N-rGO can be applied as a promising type of sensing material for electrochemical detection of DA.

Facile preparation of a cellulose microfibers–exfoliated graphite composite: a robust sensor for determining dopamine in biological samples

“…To explain the advantages and novelty of the sensor, the analytical parameters of the sensor was compared with existing DA sensors and comparative results are shown in Table 1. As can be seen that the fabricated DA sensor exhibited a lower LOD, higher sensitivity, and a wider linear range in the detection of DA than previously reported DA sensors using different composite modified electrodes (Palanisamy et al 2013;Palanisamy et al 2016a;Palanisamy et al 2016b;Shanbhag et al 2017;Xu et al 2017;Caetano et al 2017;Rahman et al 2017;Haldorai et al 2017;Yang et al 2017;Fang et al 2017;Daemia et al 2017;Wang et al 2017;Zhang et al 2017;Vellaichamy et al 2017b). Accordingly, graphite-CMF composite modified SPCE represent an alternative sensitive catalyst for low-level detection of DA.…”

Magnetic mesoporous carbon material based electrochemical sensor for rapid detection of penicillin sodium in milk

“…It could be seen from the comparison between Figure 1E and 1F that Fe 3 O 4 was transformed from a solid spherical structure to a hollow structure after a high temperature treatment. The mesoporous and hollow structure of MHM might be attributed to the pyrolysis of PDA during preparation and the phase transformation of Fe 3 O 4 during the heat treatment (Yang, Zheng, & Zheng, 2017).…”

Iron-Based Nanomaterials/Graphene Composites for Advanced Electrochemical Sensors

“…Hematite as the oldest known member of iron oxides family is an n-type semiconductor with a band gap of 2.3 eV under ambient conditions which is widespread in rocks and soils and it has shown promising capability in the fields of gas sensors [ 5 , 6 ], pigments [ 7 , 8 ], energy storages [ 9 , 10 , 11 , 12 ] and biochemical detections [ 13 , 14 , 15 ]. This form of iron oxide is highly stable and it is usually the final product of transformation of other iron oxides.…”

“…Fe 2 O 3 -nitrogen-doped reduced graphene oxide, Fe 2 O 3 /N-rGO, was synthesized for enhanced electrochemical determination of dopamine (DA) by Yang et al [ 13 ]. A simple one-step hydrothermal method was used for preparation of nanocomposite in which ethylenediamine served simultaneously as nitrogen source, reducing agent and coordinating agent.…”

“… Cyclic voltammograms obtained at GCE, GO/GCE, Fe 2 O 3 /GCE and Fe 2 O 3 /NrGO/GCE in pH 7.5 PBS in the presence of 0.05 mM DA at a scan rate of 100 mV·s −1 . Reproduced with permission from [ 13 ]. Elsevier, 2017.…”