One-step green synthesis of TiO2-Ag nanocomposites and their performance towards photocatalytic activities and antimicrobial properties.

Authors

  • Sunderishwary S. Muniandy
  • Shueai Tan
  • Noor Haida Mohd Kaus
  • S. Sasidharan
  • Hooi Ling Lee School of Chemical Sciences, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia http://orcid.org/0000-0002-9637-0617

DOI:

https://doi.org/10.11113/mjcat.v2n1.54

Keywords:

Titanium dioxide, silver, green synthesis, nanocomposites

Abstract

Heterogeneous nanocomposites consist of metal oxide and noble metals such as titanium dioxide (TiO2)-silver (Ag) are explored extensively using various methods. In the current work, TiO2-Ag nanocomposites (NCs) were prepared using a facile hydrothermal technique. The nanocomposites were synthesised at 160 °C for 24 hours with titanium(IV) isopropoxide (TTIP), silver nitrate (AgNO3) as precursors and polyvinylpyrrolidone (PVP) as a reducing agent. The sample with the best antibacterial and photocatalytic properties were further characterised by X-ray diffraction (XRD), nitrogen adsorption analysis (NAA) and field-emission scanning electron microscopy (FESEM). The as-synthesised TiO2-Ag nanocomposites with different TTIP loading were tested on methylene blue under sunlight as well as antibacterial activities against Gram-positive bacteria (Bacillus subtilis) and Gram-negative bacteria (Escherichia coli). TiO2-Ag nanocomposite showed two times broader zone of inhibition than AgNPs on both Bacillus subtilis and Escherichia coli. This smart material synthesised via green method has high potential in applications that combine both self-cleaning and antibacterial properties.

Author Biography

Hooi Ling Lee, School of Chemical Sciences, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia

A senior lecturer in the School of Chemical Sciences, Universiti Sains Malaysia since 2012.

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Published

2017-03-08

How to Cite

Muniandy, S. S., Tan, S., Mohd Kaus, N. H., Sasidharan, S., & Lee, H. L. (2017). One-step green synthesis of TiO2-Ag nanocomposites and their performance towards photocatalytic activities and antimicrobial properties. Malaysian Journal of Catalysis, 2(1). https://doi.org/10.11113/mjcat.v2n1.54

Issue

Vol. 2 No. 1 (2017)

Section

Research Article

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