title: Homogeneous synthesis of SiO2@TiO2 nanocomposites with controllable shell thickness and their enhanced photocatalytic activity.
abstract: Here we report the use of sulfuric acid as a catalyst for the facile and homogeneous synthesis of core-shell SiO(2)@TiO(2) nanocomposites using simple apparatus, under ambient pressure and temperature. The resultant SiO(2)@TiO(2) exhibits an ideal core-shell structure with uniform nanoscale TiO(2) coverage. The shell thickness of SiO(2)@TiO(2) can be conveniently tuned through adjustment of the esterification reaction parameters. Moreover, SiO(2)@TiO(2) shows improved catalytic activity in the photodegradation of methyl orange.
authors.affiliation: Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, Department of Biomedical Engineering, Huazhong University of Science and Technology, Wuhan, HuBei 430074, P.R. China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Yu
authors.forename: Ming-Zhen
authors.initials: MZ
authors.lastname: Zhang
authors.forename: Jun
authors.initials: J
authors.lastname: Chen
authors.forename: Yuan-Di
authors.initials: YD
authors.lastname: Zhao
mesh_terms: D001391:Azo Compounds / Q000737:chemistry; D002384:Catalysis; D006863:Hydrogen-Ion Concentration; D053768:Metal Nanoparticles / Q000737:chemistry*; D010782:Photolysis; D011312:Pressure; D012822:Silicon Dioxide / Q000737:chemistry*; D013696:Temperature; D014025:Titanium / Q000737:chemistry*; D014466:Ultraviolet Rays
chemical_list: D001391:Azo Compounds; C009495:titanium dioxide; C100258:methyl orange; D012822:Silicon Dioxide; D014025:Titanium