TY - JOUR
T1 - Highly thermal stable and highly crystalline anatase TiO
2
for photocatalysis
AU - Li, Wei
AU - Bai, Yang
AU - Liu, Chang
AU - Yang, Zhuhong
AU - Feng, Xin
AU - Lu, Xiaohua
AU - Van Der Laak, Nicole K.
AU - Chan, Kwong Yu
PY - 2009/7/15
Y1 - 2009/7/15
N2 -
In the absence of any doping and modification, the anatase-to-rutile phase transformation was inhibited at high temperatures giving rise to highly thermal stable and highly crystalline anatase TiO
2
fibers. The initial formation of the TiO
2
(B) phase is found tobekey in inhibiting this transformation.Theintermediate structure of the TiO
2
fiber comprises an inner anatase core with an outer TiO
2
(B) shell, which has a specific crystallographic orientation with respect to the anatase structure. During the calcination process from 300 to 800°C, both the TiO
2
(B) shell and the bulk anatase crystal structure was preserved. At temperatures of 800-900°C the TiO
2
(B)-to-anatase transformation was finished and a near-pure and thermally stable anatase fiber was obtained. This final product shows the same activity as a standard commercial photocatalyst Degussa P-25 when measured against unit mass, and 5 times the activity when measured with respect to the unit surface area. The anatase TiO
2
fibers presented here have considerable interest as practical photocatalysts for water purification, as they can be easily recycled without a decrease in their photocatalytic activity and can be prepared at large scale and at low cost.
AB -
In the absence of any doping and modification, the anatase-to-rutile phase transformation was inhibited at high temperatures giving rise to highly thermal stable and highly crystalline anatase TiO
2
fibers. The initial formation of the TiO
2
(B) phase is found tobekey in inhibiting this transformation.Theintermediate structure of the TiO
2
fiber comprises an inner anatase core with an outer TiO
2
(B) shell, which has a specific crystallographic orientation with respect to the anatase structure. During the calcination process from 300 to 800°C, both the TiO
2
(B) shell and the bulk anatase crystal structure was preserved. At temperatures of 800-900°C the TiO
2
(B)-to-anatase transformation was finished and a near-pure and thermally stable anatase fiber was obtained. This final product shows the same activity as a standard commercial photocatalyst Degussa P-25 when measured against unit mass, and 5 times the activity when measured with respect to the unit surface area. The anatase TiO
2
fibers presented here have considerable interest as practical photocatalysts for water purification, as they can be easily recycled without a decrease in their photocatalytic activity and can be prepared at large scale and at low cost.
UR - http://www.scopus.com/inward/record.url?scp=67650496171&partnerID=8YFLogxK
UR - https://pubs.acs.org/doi/10.1021/es8037005
U2 - 10.1021/es8037005
DO - 10.1021/es8037005
M3 - Article
C2 - 19708376
AN - SCOPUS:67650496171
SN - 0013-936X
VL - 43
SP - 5423
EP - 5428
JO - Environmental Science and Technology
JF - Environmental Science and Technology
IS - 14
ER -