Although the sheets embedded with TiO2
usually show less activity than the loose powder of the same catalyst
[26], it has one clear advantage over the loose powder that it
can be easily recovered after having been used and can be reused
many times. The recyclability of the TiO2 sheet should be attractive
to the water treatment industry as it helps keep the operation cost
low. The relatively low cost of the materials (photocatalyst powder
and rubber latex) is a one time investment and will last over a long
period of uses.