Graphene Nanoplatelets: Electrochemical Properties and Applications for Oxidation of Endocrine‐Disrupting Chemicals

Abstract

In most graphene-based electrochemical applications, graphene nanoplatelets (GNPs) have been applied. Now, for the first time, electrochemical properties of GNPs, namely, its electrochemical activity, potential window, and double-layer capacitance, have been investigated. These properties are compared with those of carbon nanotubes (CNTs). GNP- and CNT-coated electrodes were then applied for electrochemical oxidation of endocrine-disrupting chemicals. The GNP-coated electrode was characterized by atomic force microscopy and electrochemical techniques. Compared with the CNT-coated electrode, higher peak current for the oxidation of 4-nonylphenol is achieved on the GNP-coated electrode, together with lower capacitive current. Electrochemical oxidation of 2,4-dichlorophenol, bisphenol A, and octylphenol in the absence or presence of 4-nonylphenol was studied on the GNP-coated electrode. The results suggest that GNPs have better electrochemical performance than CNTs and are thus more promising for electrochemical applications, for example, electrochemical detection and removal of endocrine-disrupting chemicals.

Single graphene nanoplatelets: capacitance, potential of zero charge and diffusion coefficient

“…It has been reported that GNPs are suitable for electrochemical detection and removal of endocrine-disrupting chemicals, 32 nanocomposite cancer sensors, 33 nanoparticle decorated cholesterol sensors, 34 and detectors of biomarkers to name a few. 35 It is therefore essential to understand the mass transport properties of graphene materials to assist their application in biotechnology and medicine.…”

Nanomaterials for analysis and monitoring of emerging chemical pollutants

“…Graphene can be directly used to modify the electrode. For example, Wan et al [83] investigated the electrochemical properties of graphene nanoplatelets on a GCE and used the GCE for detection of endocrine-disrupting chemicals (i.e., BPA, 2,4-dichlorophenol, and octylphenol).…”

Facile Assembly of Polyaniline/Graphene Oxide Composite Hydrogels as Adsorbent for Cr(VI) Removal

“…Another study showed that PANi coated magnetic nanocomposite was capable of removal of chromium, as well as reduction of hexavalent to trivalent state . Recently, graphene and graphene oxide (GO) have attracted tremendous interest due to their special 2D nanostructures and fascinating properties . The decoration or functionalization onto graphene nanosheets facilitate the decrease of the aggregation of graphene nanosheets and guarantee the large specific surface area.…”