Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance work on Wednesday 27th March 2019 from 11:00 AM to 1:00 PM (GMT).

During this time our website performance may be temporarily affected. We apologise for any inconvenience this might cause and thank you for your patience.


Issue 7, 2019
Previous Article Next Article

Detection of ppb-level NO2 gas using a portable gas-sensing system with a Fe2O3/MWCNTs/WO3 sensor using a pulsed-UV-LED

Author affiliations

Abstract

A portable gas-sensing system which is periodically irradiated with light from a pulsed ultraviolet light emitting diode (UV-LED) was fabricated for sensing ppb-level NO2 gas. The portable NO2 gas-sensing system includes a device manager coupled to a pulsed-UV-LED sensing module, a liquid-crystal display module and a data capture module. The sensor made of a composite iron oxide/multi-walled carbon nanotubes/tungsten oxide (Fe2O3/MWCNTs/WO3) material was produced by a one-pot polyol method followed by metal organic decomposition (MOD). Scanning electron microscopy (SEM), energy dispersive spectrometry (EDS) and X-ray diffraction (XRD) were used to analyze the structure and morphology of the fabricated films. The effects of the wavelength and duration of the irradiation on the response of the portable gas-sensing system for sensing NO2 gas were studied. This portable gas-sensing system in periodically pulsed-UV-LED operation mode exhibited high sensitivity, good linearity, good stability, high reproducibility, a low detection limit and high selectivity in the sensing of NO2 gas.

Graphical abstract: Detection of ppb-level NO2 gas using a portable gas-sensing system with a Fe2O3/MWCNTs/WO3 sensor using a pulsed-UV-LED

Back to tab navigation

Publication details

The article was received on 16 Nov 2018, accepted on 08 Jan 2019 and first published on 09 Jan 2019


Article type: Paper
DOI: 10.1039/C8AY02500B
Citation: Anal. Methods, 2019,11, 973-979

  •   Request permissions

    Detection of ppb-level NO2 gas using a portable gas-sensing system with a Fe2O3/MWCNTs/WO3 sensor using a pulsed-UV-LED

    P. Su, J. Yu, I. Chen, H. Syu, S. Chiu and T. Chou, Anal. Methods, 2019, 11, 973
    DOI: 10.1039/C8AY02500B

Search articles by author

Spotlight

Advertisements