High temperature diffraction study of in-situ crystallization of nanostructured TiO2 photocatalysts
MetadataShow full item record
The in-situ crystallization of anatase and rutile on chemically-treated Ti-foils in the temperature range 20-900ºC has been investigated using synchrotron radiation diffraction and x-ray diffraction. The processing methodology has a profound influence on the morphology, crystallite size and growth rate of nanostructured TiO2. The anatase formed was metastable and transformed to rutile at ~800ºC. Increasing the temperature from 400 to 900ºC caused the sharpening of anatase (101) peaks and resulted in a concomitant coarsening in crystallite size. The surface of annealed samples exhibited TiO2 nanorods, nanowires or nanotubes depending on the processing method. Ion-beam analysis has indicated the existence of composition gradation within the annealed TiO2 samples at the near-surface.
Showing items related by title, author, creator and subject.
Effect of pressure on TiO<inf>2</inf> crystallization kinetics using in-situ high-temperature synchrotron radiation diffractionAlbetran, H.; O'Connor, B.; Low, It Meng (2017)© 2017 The American Ceramic Society The phase transformation behavior of TiO 2 sol-gel synthesized nanopowder heated in a sealed quartz capillary from room temperature to 800°C was studied using in-situ synchrotron ...
Activation energies for phase transformations in electrospun titania nanofibers: comparing the influence of argon and air atmospheresAlbetran, H.; O Connor, B.; Low, It Meng (2016)This paper reports on titania absolute phase level (amorphous, anatase, and rutile forms) changes in electrospun amorphous titania nanofibers from 25 to 900 °C in air and argon atmospheres. A novel method was developed ...
Effect of vanadium ion implantation on the crystallization kinetics and phase transformation of electrospun TiO2 nanofibersAlbetran, H.; O Connor, B.; Prida, V.; Low, It Meng (2015)The influence of V ion implantation on the thermal response of electrospun amorphous TiO2 nanofibers was studied with reference to structural phase transformation behavior, using in situ synchrotron radiation diffraction ...