A novel enzyme-free amperometric sensor for hydrogen peroxide based on Nafion/exfoliated graphene oxide–Co3O4 nanocomposite

Highly sensitive H2O2 sensor based on Co3O4 hollow sphere prepared via a template-free method

“…Therefore, a large number of efforts have been focused on the controlled synthesis of nanostructured Co 3 O 4 such as Co 3 O 4 nanorods, nanowires and nanotubes [34][35][36]. Ensafi et al [29] and Heli et al [30] both prepared Co 3 O 4 -carbon noncomposites to increase the electrical conductivity. Although they have increased electrocatalytic activity for H 2 O 2 , high cost of graphene and carbon nanotube limited their practicability in large-scale production.…”

Electrochemical nanosensors: advances and applications

“…122 This large market has resulted in the development of a large variety of electrochemical sensors to assess milk quality for possible contaminants, including melamine, 123,124 antibiotics, 59,125 bisphenol A (from packaging contamination), 126 DNA bases, 127 and hydrogen peroxide. 122,128,129 Hydrogen peroxide has been used as a means of artificially preserving milk 130 and due to the possibility of adverse health effects from over exposure, the US Food and Drug Administration has limited its acceptable concentration to 80 ppm. 131 Eggshell membranes (ESMs) have been used as a platform for supporting graphene oxide (GO) for hydrogen peroxide sensitive electrodes.…”

Novel Non Enzymatic TBHQ Modified Electrochemical Sensor for Hydrogen Peroxide Determination in Different Beverage Samples

“…3 This compound regards as an elemental key in many different applications such as clinical, chemical, biological, food production and also it is widely used in pulp and paper bleaching, sterilization and many other industries. 4 Especially in food industry, H 2 O 2 is used for sterilizing and cleaning equipments applied for mixing, transporting and packing. 3 The other aspect of H 2 O 2 importance is in diary industry.…”

“…12 Applying modified electrodes equipped with appropriate electrocatalyst such as hydroquinone derivative, is one way to deal with this problem and decrease the over-potential for H 2 O 2 reduction reaction. 4 In addition, various enzymes are widely used for H 2 O 2 determination because of its good sensitivity and selectivity. 13 But most of them are not environmentally stable and these are quite expensive.…”