Emanation thermal analysis study of N-doped titania photoactive powders

作者：Balek V^*; Subrt J; Bountseva I M; Irie H; Hashimoto K

来源：Journal of Thermal Analysis and Calorimetry, 2008, 92(1): 161-167.

DOI：10.1007/s10973-007-8755-7

• anatase
• N-doped titania
• DTA
• ETA
• porosity
• surface area

Thermal behaviour of N-doped titania powders prepared by heat treatment of anatase in gaseous ammonia at 550 and 575 degrees 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 degrees 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 degrees C. The results of surface area and porosity measurements, DTA results as well XRD patterns supported the ETA results.

• 出版日期2008-4