Title :
Nanostructured Fe doped ZnO: TiO2 for gas sensors applications
Author :
Somacescu, Simona ; Dinescu, Adrian ; Osiceanu, P.
Author_Institution :
Nat. Inst. for R&D in Microtechnologies, Bucharest, Romania
Abstract :
Nanostructured Fe doped ZnO: TiO2 with crystalline framework and porous structure were successfully synthesized by hydrothermal route, using ionic and non-ionic surfactants as templates. The structure morphology, surface chemistry and sensing properties were investigated. The results highlighted that ZnO: TiO2 materials show a wurtzite type structure with TiO2 anatase phase in higher proportion, while a minor phase TiO2 rutile was observed for the materials containing Fe. Surface chemistry revealed the elements quantitatively detected on the surface and their chemical environment. Nanostructured Fe doped ZnO: TiO2 materials were sensitive to toxic gases as CO and NO2 at 300 oC and to a small gas concentration in the range of ~3ppm.
Keywords :
II-VI semiconductors; gas sensors; iron; nanofabrication; nanostructured materials; porous semiconductors; surface chemistry; titanium compounds; wide band gap semiconductors; zinc compounds; CO; NO2; ZnO:TiO2,Fe; anatase phase; crystalline structure; gas sensors; hydrothermal method; morphology; nanostructured sample; nonionic surfactants; porous structure; rutile phase; sensing properties; surface chemistry; temperature 300 degC; Chemistry; Gases; Iron; Morphology; Surface morphology; Zinc oxide; Fe doped ZnO: TiO2; gas sensor; nanostructures; surfactants;
Conference_Titel :
Semiconductor Conference (CAS), 2012 International
Conference_Location :
Sinaia
Print_ISBN :
978-1-4673-0737-6
DOI :
10.1109/SMICND.2012.6400768
