Electrochemical Sensing of Hydrogen Peroxide Using Block Copolymer Templated Iron Oxide Nanopatterns

Abstract

A new enzyme-free sensor based on iron oxide (FeO) nanodots fabricated on an indium tin oxide (ITO) substrate via a block copolymer template was developed for highly sensitive and selective detection of hydrogen peroxide (HO). The self-assembly-based process described here for FeO formation is a simple, cost-effective, and reproducible process. The HO response of the fabricated electrodes was linear from 2.5 × 10 to 6.5 mM with a sensitivity of 191.6 μA mMcm and a detection limit of 1.1 × 10 mM. The electrocatalytic activity of FeO nanodots toward the electroreduction of HO was described by cyclic voltammetric and amperometric techniques. The sensor described here has a strong anti-interference ability to a variety of common biological and inorganic substances.

Synthesis of Zn3(VO4)2/BiVO4 heterojunction composite for the photocatalytic degradation of methylene blue organic dye and electrochemical detection of H2O2

“…In this scenario, electrochemical sensors with fast response, superior selectivity, high sensitivity, ease of operation and low cost are the optimal option for actualizing the accurate detection of hydrogen peroxide. [52][53][54] Cyclic voltammetry was employed for the measurement and detection of hydrogen peroxide analyte for Zn 3 (VO 4 ) 2 /BiVO 4 nanocomposite material. Cyclic voltammetry showed the response of bare electrode and glassy carbon modied electrode in both presence and absence of 0.5 mM hydrogen peroxide at a scan rate of À1 to 1 V s À1 , as shown in Fig.…”

Nanosensors based on polymer vesicles and planar membranes: a short review

“…They were shown efficient for ethanol and formaldehyde sensing. Bas et al [ 58 ] produced an electrochemical sensor of hydrogen peroxide using block copolymers templated iron oxide nanopatterns. A polystyrene-block-polyvinyl polymer was used because of its electron-donating character and was spin coated on a functionalized indium tin oxide surface.…”

Strategy for Enhancing Ultrahigh-Molecular-Weight Block Copolymer Chain Mobility to Access Large Period Sizes (>100 nm)

“…4,5,6,7,8,9,10,11,12,13,14 Whilst BCPs typically constitute organic based blocks, an individual block can be selectively modified to produce inorganic nanofeatures through vapor, vacuum or solution based deposition processes. 15 This facet of BCP materials has led to the generation of nanofeatures including Fe3O4 nanodots for hydrogen peroxide sensing, 16 Au/Pt structures as memory devices, 17 WO3 nanowires as active device channels, 18 and TiO2 layers for perovskite solar cells. 19 Recently, there has been a growing interest examining the use of ultra-high molecular weight (UHMW) BCPs to fabricate features and periods above 100 nm.…”