SiO_(2)/TiO_(2)核壳结构微球的制备及其光散射特性研究

Preparation and Light Scattering Properties of SiO_(2)/TiO_(2) Core-shell Microspheres

采用液相沉积法成功制备了SiO_(2)/TiO_(2)核壳结构微球,研究反应温度、(NH_(4))_(2) TiF_(6)溶液浓度对微球形貌、晶型以及壳层厚度的影响,并测试其光散射特性。研究发现:随着反应温度的升高,SiO_(2)/TiO_(2)核壳结构微球的表面包覆程度、壳层TiO_(2)结晶程度逐渐提高;改变(NH_(4))_(2) TiF_(6)溶液浓度,可制备出不同壳层厚度的核壳结构微球;SiO_(2)/TiO_(2)核壳结构微球和SiO_(2)微球相比,其光散射能力显著增强,且光散射能力随着壳层厚度的增加而逐渐加强。

SiO_(2)/TiO_(2) core-shell microspheres were synthesized by liquid deposition technology,the effects of temperature and(NH_(4))_(2) TiF_(6) concentration on the morphology,crystal form and shell thickness of microspheres were studied,the light scattering properties of microspheres were investigated.Study showed that the increase in reaction temperature can improve the surface coating integrity and crystallinity of the core-shell structured microspheres.The concentration of(NH_(4))_(2) TiF_(6) can affect the shell thickness of shell-core-shell microspheres.Compared with SiO_(2) microspheres,the light scattering intensity of SiO_(2)/TiO_(2) core-shell microspheres was significantly enhanced,the scattering ability of the core-shell microspheres gradually increased with the increase of the thickness of the shell layer.