High Photocatalytic Activity of Transparent Films Composed of ZnO Nanosheets

0423455 - ÚACH 2014 RIV US eng J - Článek v odborném periodiku
Hynek, Jan - Kalousek, Vít - Žouželka, Radek - Bezdička, Petr - Dzik, P. - Rathouský, Jiří - Demel, Jan - Lang, Kamil
High Photocatalytic Activity of Transparent Films Composed of ZnO Nanosheets.
Langmuir. Roč. 30, č. 1 (2014), s. 380-386. ISSN 0743-7463
Grant CEP: GA ČR GP13-09462P; GA ČR GAP207/10/1447
Institucionální podpora: RVO:61388980 ; RVO:61388955
Klíčová slova: Zinc oxide * photocatalysis * facet enhanced
Kód oboru RIV: CA - Anorganická chemie
Impakt faktor: 4.457, rok: 2014

Nanometric thin films were prepared by dip-coating and inkjet printing ZnO nanosheets on glass plates. The side-by-side alignment of the ZnO nanosheets on the substrate resulted in thin, transparent, oriented ZnO surfaces with the high-energy {001} facets exposed. The method of nanosheet deposition affected the film morphology; the dip-coated films were very smooth and nonporous, while the inkjet-printed films were rough and porous with the estimated void volume approximately 60-70% of the total film volume. The first-order rate constants for the photocatalytic degradation of 4-chlorophenol on the nanosheet-based films were approximately two times larger than those on nanocolumnar ZnO films or ZnO films prepared by the sol-gel technique. We attribute the high photocatalytic activity of the ZnO nanosheets to the fact that their {001} facets were predominantly exposed to the oxidized substrate. This surface arrangement and the simplicity of fabricating the ZnO nanosheet-based films make them promising for the construction of optical devices and dye-sensitized solar cells.
Trvalý link: http://hdl.handle.net/11104/0229600