A general approach to porous crystalline TiO2, SrTiO3, and BaTiO3 spheres.
Monodispersed porous crystalline TiO(2), SrTiO(3), and BaTiO(3) spheres were produced through a one-step hydrothermal process from amorphous TiO(2) spheres. The resulting samples were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and nitrogen sorption measurements. On the basis of the characterization results, we proposed a formation process of these porous spheres according to a mechanism analogous to the Kirkendall effect. This study provides a general way to synthesize porous titania-based spheres.
Wang
Yawen
Y
Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan, 430079, People's Republic of China.
Xu
Hua
H
Wang
Xiaobing
X
Zhang
Xi
X
Jia
Huimin
H
Zhang
Lizhi
L
Qiu
Jianrong
J
D000327:Adsorption; D017609:Barium Compounds / Q000737:chemistry*; D003460:Crystallization; D008855:Microscopy, Electron, Scanning / Q000379:methods; D046529:Microscopy, Electron, Transmission / Q000379:methods; D009584:Nitrogen / Q000737:chemistry; D010087:Oxides / Q000737:chemistry*; D010316:Particle Size; D016062:Porosity; D012680:Sensitivity and Specificity; D013324:Strontium / Q000737:chemistry*; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*; D014961:X-Ray Diffraction
D017609:Barium Compounds; D010087:Oxides; C024547:barium titanate(IV); C009495:titanium dioxide; D014025:Titanium; D009584:Nitrogen; C119252:strontium titanium oxide; D013324:Strontium