| 초록 |
The procedure was developed to coat polystyrene (PS) spheres with smooth, homogeneous hierarchical doubled shells of TiO 2 /SnO 2 by additive such as ammonia and Diethylenetriamine (DETA) in a sol-gel process and hydrothermal processing step by step. In addition, the thickness of SnO 2 layer could be controlled by varying the concentration of tin acetate as a SnO 2 precursor in a molar ratio of titanium isopropoxide (TTIP) with Isopropyl alcohol (IPA) solvent. Scanning electron microscopy (SEM), transmission electron microcopy (TEM) were used to observe the core/doubled shell structure. Moreover, they were investigated by using Energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) to analyze elements of them. |
