Photoactivity of Titanium Dioxide Foams

Comparative photoactivity and antibacterial properties of C60 fullerenes and titanium dioxide nanoparticles.

The production of reactive oxygen species (ROS) by aqueous suspensions of fullerenes and nano-TiO2 (Degussa P25) was measured both in ultrapure water and in minimal Davis (MD) microbial growth medium. Fullerol (hydroxylated C60) produced singlet oxygen (1O2) in ultrapure water and both 1O2 and superoxide (O2-*) in MD medium, but no hydroxyl radicals (OH*) were detected in either case. PVP/C60 (...

Graphite / Titanium Dioxide Composite

Nanosized titanium dioxide (TiO2) in its anatase form is the most frequently studied and as well as used photocatalyst. There are several syntheses procedures which enable to achieve photocatalytic TiO2. The solgel method utilizing titanium alkoxides is used most often. Alternative precursors such as titanium tetrachloride and titanyl sulphate are also frequently employed. Nowadays the environm...

Polypropylene/titanium Dioxide Nanocomposites

Titanium Dioxide in Sunscreen

Titanium dioxide has been used in various industrial and cosmetic applications due to its unique elemental properties. This substance has a refractive index higher than most other compounds (n = 2.6142, in comparison to water at 20°C n = 1.33). This allows titanium dioxide to have an iridescent and bright quality. It has been used in the cosmetics industry for “whitening” and “thickening” in mu...

Carcinogenicity Assessment of Titanium Dioxide

Introduction Titanium dioxide is a white mineral that is used to color paints, plastics, paper and other materials and is approved by the FDA as both a direct (with restricted uses) and indirect food additive. It is a non-genotoxic poorly soluble particulate. As such it has been found to not cause cancer by various routes in a number of animal models except for the rat. Titanium dioxide, as wit...