Journal
JOURNAL OF SUPERCRITICAL FLUIDS
Volume 58, Issue 1, Pages 136-141Publisher
ELSEVIER
DOI: 10.1016/j.supflu.2011.04.007
Keywords
TiO2 nanocrystal; HRTEM; Nano-twin; Photo-catalytic activity
Categories
Funding
- Grants-in-Aid for Scientific Research [20226015] Funding Source: KAKEN
Ask authors/readers for more resources
Nano-TiO2 crystals showing visible light driven photocatalytic activity were synthesized by hydrothermal reaction in an ethanol-water mixture. The experiments were conducted to optimise the synthesis conditions for nano titania, in the range of temperature from 200 to 400 degrees C. X-ray diffraction depicted that the products obtained were anatase at 250 degrees C and above. For the products obtained at 250 degrees C, detailed analysis was conducted since it depicted high crystallinity with smallest particle sizes. Shape of the crystal was rounded rectangular with the size of 4 +/- 1 nm to 7 +/- 1 nm. The high-resolution transmission electron microscopy (HRTEM) revealed the existence of novel nano-twin structure in anatase grains and surface defects around the nanocrystals. Photocatalytic property was investigated for these undoped titania samples under UV and visible light. The nano twin structure, surface defects, and nano-meter size of the synthesized titania are believed to play a crucial role for the high catalytic activity. (C) 2011 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available