Immobilized photocatalyst on stainless steel woven meshes assuring efficient light distribution in a solar reactor
An immobilized TiO<sub>2</sub> photocatalyst with a high specific surface area was prepared on stainless steel woven meshes in order to be used packed in layers for water purification. Immobilization of such a complex shape needs a special coating technique. For this purpose, dip coating...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2014-06-01
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| Series: | Drinking Water Engineering and Science |
| Online Access: | http://www.drink-water-eng-sci.net/7/41/2014/dwes-7-41-2014.pdf |
| Summary: | An immobilized TiO<sub>2</sub> photocatalyst with a high specific surface area was
prepared on stainless steel woven meshes in order to be used packed in layers
for water purification. Immobilization of such a complex shape needs a
special coating technique. For this purpose, dip coating and electrophoretic
deposition (EPD) techniques were used. The EPD technique gave the TiO<sub>2</sub>
coating films a better homogeneity and adhesion, fewer cracks, and a higher
<sup>·</sup>OH formation than the dip coating technique. The woven mesh
structure packed in layers guaranteed an efficient light-penetration in water
treatment reactor. A simple equation model was used to describe the
distribution of light through the mesh layers in the presence of absorbing
medium (e.g., colored water with humic acids). Maximum three or four coated
meshes were enough to harvest the solar UV light from 300 nm to 400 nm with
a high penetration efficiency. The separation distance between the mesh
layers played an important role in the efficiency of solar light penetration
through the coated mesh layers, especially in case of colored water
contaminated with high concentrations of humic acid. |
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| ISSN: | 1996-9457 1996-9465 |