Emanation thermal analysis study of N-doped titania photoactive powders

Autor:	Kazuhito Hashimoto, J. Ŝubrt, Vladimír Balek, Hiroshi Irie, I. M. Bountseva
Rok vydání:	2008
Předmět:	Anatase Chemical engineering Scanning electron microscope Chemistry Differential thermal analysis X-ray crystallography Mineralogy Physical and Theoretical Chemistry Atmospheric temperature range Condensed Matter Physics Microstructure Thermal analysis Porosity
Zdroj:	Journal of Thermal Analysis and Calorimetry. 92:161-167
ISSN:	1572-8943 1388-6150
DOI:	10.1007/s10973-007-8755-7
Popis:	Thermal behaviour of N-doped titania powders prepared by heat treatment of anatase in gaseous ammonia at 550 and 575°C, respectively, was characterized by emanation thermal analysis (ETA). The ETA results were used to assess transport properties of the samples subsurface using the mobility data of radon atoms previously incorporated into the samples to the depth of 60 nm. It was demonstrated that the radon permeability of anatase in the temperature range 50–500°C was enhanced for the N-doped titania as compared to the non-doped titania powder. Microstructure changes accompanying the anatase-rutile transition were pointed out from the decrease of the radon release rate in the temperature range 850–1000°C. The results of surface area and porosity measurements, DTA results as well XRD patterns supported the ETA results.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::02b49bf758813c28bb66edc5aaed6e4a https://doi.org/10.1007/s10973-007-8755-7 Zobrazit plný text záznamu Plný text ve formátu PDF