Ethanol sensor based on ZnO nanostructures prepared via microwave oven

Noor J. Ridha, Mohammad Hafizuddin Jumali, Ali Umar Akrajas, Firas K. Mohamad

Research output: Chapter in Book/Report/Conference proceedingConference contribution

11 Citations (Scopus)

Abstract

The main demanding aim for many researchers is to reduce the operating temperatures as well enhance the sensing performance of metal oxide based alcohol gas sensor. Increasing the surface to volume ratio by controlling the morphology is one of the possible methods to reduce operating temperatures of sensing nanomaterials. A microwave-assisted method has been used for effecting the formation of porous nanostructure of metal oxide materials, such as CoO and SnO2, in powder form. Here, by adopting the unique performance of a microwave-assisted-method, we realized the formation of highly porous ZnO nanostructures directly on the substrate surface, instead of in solution. The formation of ZnO nanoporous was confirmed by XRD, FE-SEM and XPS characterizations and subsequently tested for alcohol sensing performance. In addition, XRD revealed that ZnO nanoporous exhibited strong tendency to grow along (100) while generally retained the wurtzite framework. Ethanol sensing test was carried out at temperatures ranging from 25°C to 310 °C. This paper reports the gas sensing performance of ZnO synthesized as a porous nanostructure prepared by microwave method. In order to study the effect of the synthesis method and the morphology, ZnO nanorod was synthesized using a conventional hydrothermal method with comparable height with ZnO nanoporous (approximately 380-400 nm). The effects of these two different morphologies on alcohol sensing performance were investigated and discussed. The concentrations of alcohol can be detected at lower operating temperature using ZnO nanoporous sensor comparing to ZnO nanorod. The advantage of these experimental results is that the structure has significant effect on operating temperature as well as the performance of gas sensor.

Original languageEnglish
Title of host publicationProceedings of the International Conference on Sensing Technology, ICST
Pages121-126
Number of pages6
DOIs
Publication statusPublished - 2013
Event2013 7th International Conference on Sensing Technology, ICST 2013 - Wellington
Duration: 3 Dec 20135 Dec 2013

Other

Other2013 7th International Conference on Sensing Technology, ICST 2013
CityWellington
Period3/12/135/12/13

Fingerprint

Microwave ovens
Nanostructures
Ethanol
Alcohols
Sensors
Microwaves
Chemical sensors
Nanorods
Temperature
Oxides
Metals
Nanostructured materials
X ray photoelectron spectroscopy
Powders
Scanning electron microscopy
Substrates
Gases

Keywords

  • ethanol sensor
  • microwave
  • ZnO nanoporous

ASJC Scopus subject areas

  • Artificial Intelligence
  • Computer Science Applications
  • Signal Processing
  • Electrical and Electronic Engineering

Cite this

Ridha, N. J., Jumali, M. H., Akrajas, A. U., & Mohamad, F. K. (2013). Ethanol sensor based on ZnO nanostructures prepared via microwave oven. In Proceedings of the International Conference on Sensing Technology, ICST (pp. 121-126). [6727627] https://doi.org/10.1109/ICSensT.2013.6727627

Ethanol sensor based on ZnO nanostructures prepared via microwave oven. / Ridha, Noor J.; Jumali, Mohammad Hafizuddin; Akrajas, Ali Umar; Mohamad, Firas K.

Proceedings of the International Conference on Sensing Technology, ICST. 2013. p. 121-126 6727627.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Ridha, NJ, Jumali, MH, Akrajas, AU & Mohamad, FK 2013, Ethanol sensor based on ZnO nanostructures prepared via microwave oven. in Proceedings of the International Conference on Sensing Technology, ICST., 6727627, pp. 121-126, 2013 7th International Conference on Sensing Technology, ICST 2013, Wellington, 3/12/13. https://doi.org/10.1109/ICSensT.2013.6727627
Ridha NJ, Jumali MH, Akrajas AU, Mohamad FK. Ethanol sensor based on ZnO nanostructures prepared via microwave oven. In Proceedings of the International Conference on Sensing Technology, ICST. 2013. p. 121-126. 6727627 https://doi.org/10.1109/ICSensT.2013.6727627
Ridha, Noor J. ; Jumali, Mohammad Hafizuddin ; Akrajas, Ali Umar ; Mohamad, Firas K. / Ethanol sensor based on ZnO nanostructures prepared via microwave oven. Proceedings of the International Conference on Sensing Technology, ICST. 2013. pp. 121-126
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