| Tin dioxide (SnO2), a larruping n-type semiconductor with a wide band gap, which has been widely used in gas sensors, solar cells, catalysis and luminescence. This work is unfolded at the nanoporous of tin dioxides, how to get the different diameter porous nanostructure and the novel physical and optical properties of the porous samples are analysed in this paper. The main results as follow:1. The polystyrene(PS) beads solution have prepared through a simple method water-bath With styrene, pure water as raw materials and use the potassium persulfate (KPS) as initiator. The diameter of the PS beads at200,250,300, and400nm are finally prepared by controlling the concentration of the reactant, and at the last, we get the ordered PS masterplate on the glass by the Vertical deposition method.2. The sol-gel resolution is prepared by commingling tin(IV) chloride tetrahydrate (SnCl4-4H2O) and anhydrous ethanol in a waterbath installation and keeping at80℃for10hours, then take that at a room tempreture for24hours as staleness. Finally, the simples are synthesized through a stem of annealing at500℃for several hours. Before annealed, the templates are dropped the sol-gel solution first. there is a novel photoluminescence (PL) peak (except the peak centered at～600nm) that seldom seen in the bulk SnO2materials centered at～430nm have been revelationed as the PL spectroscopy showing, it is bilieved that the defects of the as-synthesized particular porous nanostrctures is being responsibility for that.3. the ordered porous SnO2nanostructures showed a excellent photocatalysis performance on the degradation of methyl orange under UV irradiation when the as-synthesized porous nanostrctures were checked by the photocatalytic effecting. We found that the photocatalysis performance can be directly changed by the concentration of the reactants, the annealing temperature and the diameter of the porous sample, the smaller diameters of the porous, the better performance of photocatalytic. |
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