Highly sensitive and selective hydrogen peroxide biosensor based on hemoglobin immobilized at multiwalled carbon nanotubes–zinc oxide composite electrode

Electrocatalytic Behavior of Hemoglobin Oxidation of Hydrazine Based on ZnO Nano-rods with Carbon Nanofiber Modified Electrode

“…It indicated that a direct electron transfer between Hb and the electrode occurred. However, unlike those CVs of Hb modified electrode reported previously, 29 at first, the two potentials of redox reaction were positive. The formal potential (E 0 ), calculated from the average of oxidation and reduction peak potentials, was -0.285 V and the peak potential separation (nΔEp) was approximately 100 mV, which was much larger than the theoretical value of reversible redox reaction, 59/n mV.…”

“…A normal and convenient approach reported is UV-Vis, namely that the shape and position of Soret absorption band of heme iron provides the valuable information of the denaturation of heme protein. 28,29 Therefore, UV-Vis was firstly employed for the detection of Hb/ZnO/CNF. The spectra including those of ZnO/CNF and Hb are shown in Fig.…”

Hydrogen peroxide biosensor utilizing a hybrid nano-interface of iron oxide nanoparticles and carbon nanotubes to assess the quality of milk

“…5). This low applied potential is highly beneficial for the detection of the hydrogen peroxide as it efficiently overcomes the limitations namely matrix effect caused by the common interference species and the oxygen reduction current [47].…”

Synthesis, characterization and electrochemical-sensor applications of zinc oxide/graphene oxide nanocomposite

“…Thus, the integration (or hybridization) of ZnO with other carbon-based materials has been reported [12,13]. Due to its interesting mechanical and electrochemical properties, and the ease of its mass production in addition to the abundance of several function groups on its surface [12,14], graphene oxide (GO) has attracted our attention to build up sensitive and reliable electrochemical sensors and biosensors.…”