Copper oxide nanofibres for detection of hydrogen peroxide vapour at high concentrations

Abstract

We present a sensor concept based on copper(II)oxide (CuO) nanofibres for the detection of hydrogen peroxide (H 2 O 2 ) vapour in the percent per volume (% v/v) range. The fibres were produced by using the electrospinning technique. To avoid water condensation in the pores, the fibres were initially modified by an exposure to H 2 S to get an enclosed surface. By a thermal treatment at 350 8C the fibres were oxidised back to CuO. Thereby, the visible pores disappear which was verified by SEM analysis. The fibres show a decrease of resistance with increasing H 2 O 2 concentration which is due to the fact that hydrogen peroxide is an oxidising gas and CuO a p-type semiconductor. The sensor shows a change of resistance within the minute range to the exposure until the maximum concentration of 6.9% v/v H 2 O 2 . At operating temperatures below 450 8C the corresponding sensor response to a concentration of 4.1% v/v increases. The sensor shows a good reproducibility of the signal at different measurements. CuO seems to be a suitable candidate for the detection of H 2 O 2 vapour at high concentrations.Resistance behaviour of the sensor under exposure to H 2 O 2 vapours between 2.3 and 6.9% v/v at an operating temperature of 450 8C.

Copper oxide based H2S dosimeters – Modeling of percolation and diffusion processes

“…In recent years also pure CuO structures are used as transducer for the detection of carbon monoxide, nitrogen dioxide, hydrogen or hydrogen peroxide [8][9][10][11]. Especially for H 2 S sensing copper oxide layers are of broad interest due to their high selectivity [12,13].…”

Metal Oxide Nanosensors Using Polymeric Membranes, Enzymes and Antibody Receptors as Ion and Molecular Recognition Elements

“…Different types of analyte-receptor bindings, including affinity-based binding, hydrophobic interactions, hydrogen bonding, and polar interactions, can be employed in the same manner. Especially for pure affinity interactions with the outer surface of the artificial receptor, the nanostructure-based recognition layer would strongly improve the sensor response because of the high surface-to-volume ratio of nanostructures [ 1 – 4 ].…”

Improvements in photostability and sensing properties of EuVO4 nanoparticles by microwave-assisted sol–gel route for detection of H2O2 vapors

“…Many workers in the past have reported detection of H 2 O 2 vapors by employing mainly electrochemical methods using modified working electrodes [8][9][10] or amperometric detection [11]. Smart fluorescence quenching sensing methods have also been reported and are promising for rapid and sensitive detection of explosives [12].…”