Abstract
Stainless steel wire meshes have been functionalised with multiple titanium dioxide (TiO2) coatings deposited by the sol-gel 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 TiO2 nanopowders in the colloidal deposition solution enhanced the photocatalytic performance of the deposited TiO2 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. Complete regeneration of the catalyst could be achieved by rinsing it with warm deionised water and was observed in the case of experiments for NOx abatement.
| Original language | English |
|---|---|
| Pages (from-to) | 1225-1231 |
| Number of pages | 7 |
| Journal | Materials Chemistry and Physics |
| Volume | 124 |
| Issue number | 2-3 |
| DOIs | |
| Publication status | Published - 1 Dec 2010 |
| Externally published | Yes |
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Keywords
- Environment
- Photocatalysis
- Sol-gel deposition
- Titanium dioxide
- Wire meshes
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
Cite this
Photocatalytic degradation activity of titanium dioxide sol-gel coatings on stainless steel wire meshes. / Bestetti, M.; Sacco, D.; Brunella, M. F.; Franz, S.; Amadelli, R.; Samiolo, L.
In: Materials Chemistry and Physics, Vol. 124, No. 2-3, 01.12.2010, p. 1225-1231.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Photocatalytic degradation activity of titanium dioxide sol-gel coatings on stainless steel wire meshes
AU - Bestetti, M.
AU - Sacco, D.
AU - Brunella, M. F.
AU - Franz, S.
AU - Amadelli, R.
AU - Samiolo, L.
PY - 2010/12/1
Y1 - 2010/12/1
N2 - Stainless steel wire meshes have been functionalised with multiple titanium dioxide (TiO2) coatings deposited by the sol-gel 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 TiO2 nanopowders in the colloidal deposition solution enhanced the photocatalytic performance of the deposited TiO2 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. Complete regeneration of the catalyst could be achieved by rinsing it with warm deionised water and was observed in the case of experiments for NOx abatement.
AB - Stainless steel wire meshes have been functionalised with multiple titanium dioxide (TiO2) coatings deposited by the sol-gel 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 TiO2 nanopowders in the colloidal deposition solution enhanced the photocatalytic performance of the deposited TiO2 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. Complete regeneration of the catalyst could be achieved by rinsing it with warm deionised water and was observed in the case of experiments for NOx abatement.
KW - Environment
KW - Photocatalysis
KW - Sol-gel deposition
KW - Titanium dioxide
KW - Wire meshes
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UR - http://www.scopus.com/inward/citedby.url?scp=77957833975&partnerID=8YFLogxK
U2 - 10.1016/j.matchemphys.2010.08.062
DO - 10.1016/j.matchemphys.2010.08.062
M3 - Article
VL - 124
SP - 1225
EP - 1231
JO - Materials Chemistry and Physics
JF - Materials Chemistry and Physics
SN - 0254-0584
IS - 2-3
ER -