Effects of aging on nanocrystalline anatase-to-rutile phase transformation kinetics
Source abstract
Abstract
The effects of aging on the kinetics for nanocrystalline anatase-to-rutile phase transformation were investigated. The agglomeration and crystallite sizes for TiO2 gels decreased with increasing aging treatment. For unaged samples, the agglomeration number was high, so that there are a larger number of anatase crystallites and crystallite–crystallite anatase contacts in each cluster. This promotes interfacial nucleation. Therefore, the activation energy of nucleation calculated for unaged samples was smaller than that for those found for the aged ones. # 2007 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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Research context
OpenAlex topics: TiO2 Photocatalysis and Solar Cells · Catalytic Processes in Materials Science · Advanced Photocatalysis Techniques
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References (20)
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1. Photocatalytic degradation of gaseous sulfur compounds by silver-deposited titanium dioxide10.1016/j.apcatb.2004.10.015 ↗
2. Rayne · 1961 · vol. II
3. Effect of sinter temperature on the electrical properties of TiO2-based capacitor–varistors10.1016/S0167-577X(02)00996-5 ↗
4. Preparation and characterization of colloidal solution derived crystallized titania powder10.1016/S0955-2219(98)00143-5 ↗
5. Hydrothermal synthesis of nanosized titania powders: influence of tetraalkyl ammonium hydroxides on particle characteristics10.1111/j.1151-2916.2001.tb00901.x ↗
6. Influence of solution concentration on the hydrothermal preparation of titania crystallites10.1039/b105907f ↗
7. Formation of monodisperse spherical TiO2 powders by thermal hydrolysis of Ti(SO4)210.1111/j.1151-2916.1996.tb09038.x ↗
8. The calcination of titania. IV. The effect of additives on the anatase–rutile transformation
9. Particle size effects on transformation kinetics and phase stability in nanocrystalline TiO210.2138/am-1997-7-809 ↗
10. Kinetics of the anatase–rutile transformation10.1111/j.1151-2916.1965.tb14774.x ↗
11. Textural evolution and phase transformation in titania membranes10.1039/JM9930301151 ↗
12. The calcination of titania. V. Kinetics and mechanism of the anatase–rutile transformation in the presence of additives
13. New kinetic model for the nanocrystalline anatase-to-rutile10.2138/am-1999-0406 ↗
14. Phase transformation of nanocrystalline anatase to rutile via combined interface and surface nucleation10.1557/JMR.2000.0067 ↗
15. On the time exponent in isothermal grain growth10.1007/BF03038435 ↗
16. Brinker · 1990
17. Effects of aging on the phase transformation and sintering properties of TiO2 gels10.1016/j.msea.2004.03.045 ↗
18. Quantitative analysis of anatase–rutile mixtures with an X-ray diffractometer10.1021/ac60125a006 ↗
19. Initial sintering of submicrometer titania anatase powder10.1111/j.1151-2916.1990.tb05094.x ↗
20. Kingery · 1991