ICENS, Sarajevo, Bosna-Hersek, 25 - 27 Mayıs 2016, ss.462
Zinc Oxide (ZnO) is the one of the most promising material for filtering applications due to its high total surface area. It is also a well-known fact that ZnO is a polar crystal with hexagonal phase, and the high anisotropy of ZnO leads to the oriented growth along the c axis. This high anisotropy helps high nanotube formation during recrystallization.
In this study, single crystal ZnO nanorods are successfully synthesized using Zn(O2CCH3)2(H2O)2,
NaOH and distilled water as precursors at ambient pressure and room temperature. Firstly, Zinc
Acetate is added to distilled water and stirred magnetically (Solution A). Then NaOH is added to
distilled water and stirred magnetically as well (Solution B). Afterwards, Solution B added to Solution A,
dropwisely and stirred for 2 hours. Finally obtained nano structures are calcined at 300 ˚C for 3 hours.
Synthesized ZnO nanorods are used to produce multi walled ZnO nanotubes using simple
hydrothermal treatment without use of any catalysts, plates or substrates. ZnO nanotube structures
are synthesized at low temperatures by employing ZnO nanorods and H2O2 as starting materials.
ZnO nanorods are added to H2O2 and stirred for 1 hour. The solution is put on a stainless steel
autoclave and is treated hydrothermally at 180 ℃ for 24 hours. After drying process, the final product is
calcined at 500 ˚C for 5 hours. Characterization result indicate that both tubular and rod structures are
successfully synthesized. Synthesized nanotubes are suspended in acetone and alcohol for obtaining a
stable solution and this solution is used for coating carbon and stainless steel based porous filter by
using electrophoretic deposition.
Finally, filtering capability of coated filters is simulated. For modelling and simulation of air flow of
manufactured filters Solidworks and Ansys programmes are employed. Tubular and rod like
nanostructures demonstrated effective catalytic and air filtration properties at room temperature.