ACTIVITATEA ANTIMICROBIANA A NANOMATERIALELOR PE BAZA DE TiO2

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ACTIVITATEA ANTIMICROBIANA A NANOMATERIALELOR PE BAZA DE TiO2 Photocatalytic killing of a bacterium

Experimental setup for photocatalytic disinfection experiment

Inactivation of Bacillus cereus endospores; MWNT- multi-wall-nanotubes of carbon

Photocatalytic inactivation of E Photocatalytic inactivation of E. coli in aqueous solution under different conditions. The error bars represent standard deviation of triplicate tests.

FESEM images of E. coli before (a) and after photocatalytic reaction with TiO2–Ag2.0% under UVA irradiation for 30 min (b), 60 min (c), and 120 min (d), respectively. The scale bar is 500 nm.

TEM images of E. coli before (a) and after photocatalytic reaction with TiO2–Ag2.0% under UVA irradiation for 30 min (b), 60 min (c), and 120 min (d), respectively.

Viability of HeLa cells incubated in MEMmedia containing 1, 3, 5, 7 and 9mM TiO2 nanoparticles. The 100% correspond to the control dish

Microscopic images of HeLa cells. With neither Ag@TiO2 nanoclusters composites nor light, after 10-min light irradiation without the nanocomposites, after 5-min light irradiation with the nanocomposite dead cells stained with trypan blue.

Cell viability under 5-min UV, visible, and UV–visible light irradiation.

Survival ratio of E-Coli cultured in the presence of TiO2 nanoparticles with various silver contents under different UV illumination time.

The optical image of E. coli cultured in the presence of Ag/TiO2 nanoparticles under UV (aef) and visible (gel) light illumination with various silver contents (a, g) bare TiO2, (b, h) 0.01, (c, i) 0.03, (d, j) 0.05, (e, k) 0.1, (f, l) 0.15 gr Ag/TiO2 nanoparticles.

Growth of P. expansum on potato dextrose agar (PDA) plates: (a) Absence of TiO2 and UVA, (b) TiO2 alone (1 mg TiO2/ml), (c) TiO2 alone (10 mg TiO2/ml), (d) UVA alone, (e) presence of TiO2 and UVA (1 mg TiO2/ml), and (f) presence of TiO2 and UVA (10 mg TiO2/ml).

Viability of HeLa cells incubated in MEM media containing Ag@TiO2 core–shell nanoclusters with different Ag:TiO2 ratios; (1mM) 1:1, (3mM) 1:3, (5mM) 1:5, (7mM) 1:7 and (9mM) 1:9 with 5min irradiation by Xe lamp.