Photocatalytic degradation activity of titanium dioxide sol-gel coatings on stainless steel wire meshes

作者：Bestetti M^*; Sacco D; Brunella M F; Franz S; Amadelli R; Samiolo L

来源：Materials Chemistry and Physics, 2010, 124(2-3): 1225-1231.

DOI：10.1016/j.matchemphys.2010.08.062

• Titanium dioxide
• Sol-gel deposition
• Wire meshes
• Photocatalysis
• Environment

Stainless steel wire meshes have been functionalised with multiple titanium dioxide (TiO(2)) coatings deposited by the sol-get technique using titanium isopropoxide as precursor and titanium dioxide nanopowders dispersed in the colloidal solution After the thermal conversion of the amorphous fraction of the coating Into anatase the functionalised stainless steel wire meshes were tested for the UV photodegradation of aqueous solutions of methylene blue solid stearic acid and nitrogen oxides in air The addition of TiO(2) nanopowders in the colloidal deposition solution enhanced the photocatalytic performance of the deposited TiO(2) layers in all the tested conditions Moreover increasing the number of coatings (from 1 to 4) improves the photocatalytic efficiency
The catalyst did not show reduced photoreactivity after four repeated cycles in water decontamination from methylene blue and after up to 10 repeated cycles in nitrogen oxides photodegradation C

• 出版日期2010-12-1