Electrocatalytic oxidation behavior of guanosine at graphene, chitosan and Fe3O4 nanoparticles modified glassy carbon electrode and its determination

A Review: Nanomaterials Applied in Graphene-Based Electrochemical Biosensors

“…(144)(145)(146)(147)(148) NF, as another polymer solution for the preparation of graphene-based electrodes, has been extensively used to immobilize enzymes on the electrode surface owing to its good biocompatibility, unique ion-exchange ability, thermal stability, mechanical strength, excellent film-forming ability, and antifouling properties. (149,150) In particular, its strong antifouling properties would accelerate electron transfer between the recognition element and the electrode.…”

Voltammetric analysis with the use of a novel electro-polymerised graphene-nafion film modified glassy carbon electrode: Simultaneous analysis of noxious nitroaniline isomers

“…From the slopes of the above equations ˛n values were estimated to be 0.521, 0.550 and 0.534 for 2-NA, 3-NA and 4-NA, respectively. Generally, ˛ is assumed to be 0.5 for a totally irreversible electrode process [37] and consequently, the value for the number of electrons (n) transferred in the electrooxidation of each of 2-NA, 3-NA and 4-NA is close to 1. Therefore, the electrochemical oxidation mechanisms of these three analytes at the poly-DHCBAQS/graphene-nafion/GCE involved one-electron each (Scheme 2).…”

Electrochemical Determination of Nitrite and Iodate Based on Pt Nanoparticles Self-assembled on a Chitosan Modified Glassy Carbon Electrode

“…This porous structure can be useful to adsorb particles and analytes onto the electrode surface to fabricate all kinds of sensors. [24][25][26][27][28][29][30] The electrochemical properties of the modified electrodes were investigated by CV. As shown in Fig.…”

“…11,12 Many studies have reported on the ability of chitosan to bind with metal ions and the support metal nanoparticles, [13][14][15][16][17][18][19][20][21][22][23] and several electrochemical sensors have been developed based on the interaction between chitosan and analytes. [24][25][26][27][28][29][30] However, we have not found any papers concerning the detection of iodate using a chitosan-modified electrode. In the present work, we investigated the synthesis of Pt nanoparticles (nano-Pts) by a simple method, and then self-assembled on the chitosan modified glassy carbon electrode.…”