Abstract
In this experiment, photocatalysic material ,which is magnetic, photoluminesce and has superior light absorbing mesoporous, was synthesized by sol-gel method with tetrabutyl titanate, zinc acetate, stannic chloride , antimonic chloride and ferric nitrate as precursors, and tri-blocked copolymer F 127 as the template.Based on the experiment results, when the annealing temperature is at 550°C, the annealing time is 120min , the doping amount of Zn is 4.0at%. These produced samples were shown to have superior luminescence and UV-vis light absorbance. When the weight of template was set to 1.5g, the obtained photocatalysic materials, indicated that their porous mainly distributed within 1.2nm to 4.7nm and their specific surface areas were larger than 110m 2 /g, and had excellent absorption properties.
Highlights
Micro-nanometer sized TiO2 hollow structures nanomaterials have attracted a great deal of attention because of their high photo-catalytic activity, chemical stability, low cost, nontoxicity, low density, high surface area, superior surface permeability and large light-harvesting efficiencies[1–6]
TiO2 follows a relatively high electron–hole recombination rate, which is detrimental to its photo-activity. Different approaches such as transition metal doping, inorganic dye-sensitizing, valuable metal deposition and coupling titania with other semiconductors have been devoted to enhancing the photo-catalytic activity of TiO2 in which the response of the semiconductor was extended toward the visible region[19–21]
When the doping amount of Zn was less than 4%, the main diffraction peaks distributed at 2ș = 25.68°ˈ38.17°ˈ48.32°ˈ 55.37°ˈ63.05°, the corresponding crystal surfaces of anatase crystal structure were 101, 004, 200, 211 and 204 respectively
Summary
Micro-nanometer sized TiO2 hollow structures nanomaterials have attracted a great deal of attention because of their high photo-catalytic activity, chemical stability, low cost, nontoxicity, low density, high surface area, superior surface permeability and large light-harvesting efficiencies[1–6]. These materials can be widely applied in photoelectric devices, catalysis, drug delivery, chromatography separation and chemical reactors[7–12]. Template-assisted synthetic method has been proved to be the most-applied and most-effective route to fabricate inorganic hollow structures. The influence of amount of template on the distribution of porous and absorption capacity has been discussed in this paper
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