Visible Light Photocatalyst Anatase Phased TiO 2 Nanoparticles for Enhanced Antibacterial Performance
- PDF / 1,956,366 Bytes
- 9 Pages / 595.276 x 790.866 pts Page_size
- 20 Downloads / 235 Views
(0123456789().,-volV)(0123456789(). ,- volV)
ORIGINAL PAPER
Visible Light Photocatalyst Anatase Phased TiO2 Nanoparticles for Enhanced Antibacterial Performance G. Nagaraj1
•
S. Tamilarasu2
Received: 28 June 2020 / Accepted: 3 November 2020 Ó Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract This study reports the development of anatase TiO2 synthesized by facile photon-induced method (PIM) at various reaction times of 6 days, 8 days, 10-day samples. The 10 days TiO2 sample shows stable anatase phase, whereas 100% rutile phase at the same temperature was observed for standard TiO2. Mainly, the PIM was used to tuning the properties of visible light absorbance TiO2 photocatalyst used for improving antibacterial performance. The antibacterial activity of TiO2 against Staphylococcus aureus and Escherichia coli was determined by the agar disc diffusion method. Anatase TiO2 nanoparticles demonstrated excellent antibacterial activity against extracellular S. aureus with 80% and E. coli with 82% killing efficacy at concentrations as low as 100 lg/mL, which is 100% faster than the standard and other pure TiO2 reported earlier. The obtained undoped anatase Titania with enhanced chemical reactivity has great potential for antibacterial properties. Moreover, the smaller crystallite size (25 nm) and narrowing bandgap (2.96 eV) TiO2 nanoparticles were more effective in killing bacteria compared with standard TiO2. Therefore, this work indicated that anatase phased TiO2 under visible light absorbance has good potential with excellent clinical applications. Keywords Pure titania PIM Antibacterial Oxygen-rich High phase stability
Introduction The semiconductor-based photocatalysis has received great attention in recent times. The reason is that it is inexpensive, has good photostability and is environmental friendly for the elimination of organic contaminants in the waste-water by using renewable solar energy [1–4]. Moreover, photocatalysis is also known as green technology as it eliminates organic contaminants into nontoxic molecules of CO2, H2O and mineral acids without producing any secondary pollution [5–7]. The titanium-di-oxide (TiO2) has great potential in many research fields such as solar cells, batteries, selfcleaning, antibacterial, and cancer therapy so far [8–13]. The TiO2 is used as a promising photocatalyst material to deal with energy and environmental application owing to its & G. Nagaraj [email protected] 1
Department of Physics, Periyar University P.G Extension Center, Dharmapuri, Tamil Nadu, India
2
Department of Physics, Jayam Arts and Science College, Periyar University, Salem, Tamil Nadu, India
better behavior of non-toxicity, high chemical inertness, and good photo-stability [14, 15]. The influence of structure and surface properties of TiO2, such as phase type [16], particle size [17], surface area [18], crystallinity [19] and oxygen vacancy concentration [20] on its photocatalytic activities have been extensively investigated so far. The large application of
Data Loading...
