Inactivation of Escherichia coli under fluorescent lamp using TiO 2 nanoparticles synthesized via sol gel method

Sapizah Rahim, Shahidan Radiman, Ainon Hamzah

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Titanium dioxide nanoparticles were synthesized by using sol gel method and their physico-chemical properties were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and UV-Vis spectrophotometer. The photocatalytic property of TiO 2 nanoparticles was investigated by inactivation of Escherichia coli under irradiation of fluorescent lamp. The results showed that the size of TiO 2 was in the range of 3 to 7 nm with high crystallinity of anatase phase. The sharp peaks in FTIR spectrum determined the purity of TiO 2 nanoparticles and absorbance peak of UV-Vis spectrum showed the energy band gap of 3.2 eV. Optimum inactivation of E. coli was obtained at 1.0 g/L TiO 2 nanoparticles, with 80% of E. coli population was inactivated. The light scattering effect and insufficient concentration are the factors that cause the less effective inactivation reaction for 2.5 g/L and 0.1 g/L TiO 2 concentration.

Original languageEnglish
Pages (from-to)219-224
Number of pages6
JournalSains Malaysiana
Volume41
Issue number2
Publication statusPublished - Feb 2012

Fingerprint

Fluorescent lamps
Escherichia coli
Sol-gel process
Nanoparticles
Ultraviolet spectrophotometers
Light scattering
Band structure
Chemical properties
Energy gap
Irradiation
Transmission electron microscopy
X ray diffraction
titanium dioxide

Keywords

  • E. coli
  • Photocatalyst
  • Sol gel
  • TiO nanoparticles

ASJC Scopus subject areas

  • General

Cite this

Inactivation of Escherichia coli under fluorescent lamp using TiO 2 nanoparticles synthesized via sol gel method. / Rahim, Sapizah; Radiman, Shahidan; Hamzah, Ainon.

In: Sains Malaysiana, Vol. 41, No. 2, 02.2012, p. 219-224.

Research output: Contribution to journalArticle

Rahim, Sapizah ; Radiman, Shahidan ; Hamzah, Ainon. / Inactivation of Escherichia coli under fluorescent lamp using TiO 2 nanoparticles synthesized via sol gel method. In: Sains Malaysiana. 2012 ; Vol. 41, No. 2. pp. 219-224.
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