Influence of PANI additions on methanol sensing properties of ZnO thin films

Mohammad Hafizuddin Jumali, Norhashimah Ramli, Izura Izzuddin, Muhamad Mat Salleh, Muhammad Yahaya

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The influence of PANI additions on methanol sensing properties of ZnO thin films at room temperature had been investigated. Commercial polyaniline powder (PANI) was mixed into 3 mL ZnO solution in five different weight percentages namely 1.25, 2.50, 3.75, 5.00 and 6.25% to obtain ZnO/PANI composite solutions. These solutions were spin coated onto glass substrate to form thin films. Microstructural studies by FESEM indicated that ZnO/PANI films showed porous structures with nanosize grains. The thickness of the film increased from 55 to 256 nm, proportionate to increment of PANI. The presence of 2 adsorption peaks at -310 nm and -610 nm in UV- Vis spectrum proved that addition of PANI has modified the adsorption peak of ZnO film. Methanol vapour detection showed that addition of PANI into ZnO dramatically improved the sensing properties of the sensor. The sensors also exhibited good repeatability and reversibility. Sensor with the amount of PANI of 3.75 wt% exhibited the highest sensitivity with response and recovery time was about 10 and 80 s, respectively. The possible sensing mechanism of the sensor was also discussed in this article.

Original languageEnglish
Pages (from-to)203-208
Number of pages6
JournalSains Malaysiana
Volume40
Issue number3
Publication statusPublished - Mar 2011

Fingerprint

Powders
Methanol
Thin films
Sensors
Adsorption
polyaniline
Vapors
Recovery
Glass
Composite materials
Substrates

Keywords

  • Gas sensor
  • Methanol vapour
  • Microstructure
  • UV- Vis analysis
  • ZnO/PANI thin film

ASJC Scopus subject areas

  • General

Cite this

Jumali, M. H., Ramli, N., Izzuddin, I., Mat Salleh, M., & Yahaya, M. (2011). Influence of PANI additions on methanol sensing properties of ZnO thin films. Sains Malaysiana, 40(3), 203-208.

Influence of PANI additions on methanol sensing properties of ZnO thin films. / Jumali, Mohammad Hafizuddin; Ramli, Norhashimah; Izzuddin, Izura; Mat Salleh, Muhamad; Yahaya, Muhammad.

In: Sains Malaysiana, Vol. 40, No. 3, 03.2011, p. 203-208.

Research output: Contribution to journalArticle

Jumali, MH, Ramli, N, Izzuddin, I, Mat Salleh, M & Yahaya, M 2011, 'Influence of PANI additions on methanol sensing properties of ZnO thin films', Sains Malaysiana, vol. 40, no. 3, pp. 203-208.
Jumali MH, Ramli N, Izzuddin I, Mat Salleh M, Yahaya M. Influence of PANI additions on methanol sensing properties of ZnO thin films. Sains Malaysiana. 2011 Mar;40(3):203-208.
Jumali, Mohammad Hafizuddin ; Ramli, Norhashimah ; Izzuddin, Izura ; Mat Salleh, Muhamad ; Yahaya, Muhammad. / Influence of PANI additions on methanol sensing properties of ZnO thin films. In: Sains Malaysiana. 2011 ; Vol. 40, No. 3. pp. 203-208.
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