| 초록 |
Hierarchical microspheres fabricated from a polymeric sphere, PS core and TiO2/SnO2 doubled shell have been successfully synthesized by surface charge interaction with catalysis in sol-gel processing and additional hydrothermal method. With adding ammonia as catalyst, a prepared negatively charged polystyrene microsphere could be changed to positive surface charge. At the same time, it was acted as hydrolyzing partially negative charged Titania precursors on positively changed surface of PS. In the next steps, the prepared PS@TiO2 core/shell microbeads were attached again with tin dioxide precursor via electrostatic interaction with diethylenetriamine(DETA) in order to make a double shell(TiO2/SnO2). The final products were characterized by XRD, SEM, TEM measurements and we can provide to applicate in various field such as chemical cells, photocatalyst, sensors and so on. |
