Double-Shelled TiO2Hollow Spheres Assembled with TiO2Nanosheets.
High-quality double-shelled TiO2hollow spheres (DHS-Ti) assembled with TiO2nanosheets have been synthesized for the first time through a simple hydrothermal treatment of sSiO2@TiO2(TiO2-coated solid SiO2spheres). The double-shelled structure shows a high BET surface area up to 417.6 m2g-1. Anatase DHS-Ti of high crystallinity can be obtained without structural collapse by calcination treatment. The effects of cetyl trimethylammonium bromide (CTAB) concentration, pH, and hydrothermal reaction temperature have also been investigated with a series of contrast experiments. A formation mechanism involving the in situ growth of amorphous TiO2nanosheets followed by the redeposition of dissolved silica species is proposed. Lastly, the DHS-Ti forming strategy can be extended as a general strategy to fabricate various morphological hollow nanostructures and double-shelled Pt nanocatalysts by rationally selecting functional sSiO2nanoparticles as core materials. This work could open up a new strategy for controllable synthesis of complex hollow structures and other functional materials.
School of Chemistry and Chemical Engineering, Southeast University, Jiangsu Optoelectronic Functional Materials and Engineering Laboratory, Nanjing, 211189, P. R. China.
Chao
C
Zhang
School of Chemistry and Chemical Engineering, Southeast University, Jiangsu Optoelectronic Functional Materials and Engineering Laboratory, Nanjing, 211189, P. R. China.
Yuming
Y
Zhou
School of Chemistry and Chemical Engineering, Southeast University, Jiangsu Optoelectronic Functional Materials and Engineering Laboratory, Nanjing, 211189, P. R. China.
Yiwei
Y
Zhang
School of Chemistry and Chemical Engineering, Southeast University, Jiangsu Optoelectronic Functional Materials and Engineering Laboratory, Nanjing, 211189, P. R. China.
Shuo
S
Zhao
School of Chemistry and Chemical Engineering, Southeast University, Jiangsu Optoelectronic Functional Materials and Engineering Laboratory, Nanjing, 211189, P. R. China.
Jiasheng
J
Fang
School of Chemistry and Chemical Engineering, Southeast University, Jiangsu Optoelectronic Functional Materials and Engineering Laboratory, Nanjing, 211189, P. R. China.
Xiaoli
X
Sheng
School of Chemistry and Chemical Engineering, Southeast University, Jiangsu Optoelectronic Functional Materials and Engineering Laboratory, Nanjing, 211189, P. R. China.
Tao
T
Zhang
School of Chemistry and Chemical Engineering, Southeast University, Jiangsu Optoelectronic Functional Materials and Engineering Laboratory, Nanjing, 211189, P. R. China.
Hongxing
H
Zhang
TiO2; double-shelled hollow spheres; hydrothermal treatment; mesoporous SiO2; nanosheets; nanostructures