层状K_xH_(2-x)Ti_4O_9的制备及其光谱性质研究

以TiO2与K2CO3为原料,采用高温固相法合成K2Ti4O9,利用离子交换反应制备了H2Ti4O9。以粉末X-射线衍射(XRD)、扫描电镜(SEM)表征了样品结构与形貌特征,以固体漫反射表征了酸化前后的光谱性质,结果表明,制备的样品晶型较好且具有明显的层状结构,酸化后样品的光谱响应红移,即能提高太阳光的利用率。

Study of Spectral Character and Producing Technology of Layered KxH2-xTi4O9

K2Ti4O9 was synthesised by high-temperature solid state with TiO2 and K2CO3 as raw materials and H2Ti4O9 was prepared by ion exchange reaction. The structure and morphology of the samples was characterized by powder X-ray diffraction （XRD） and scanning electron microscopy （SEM）. The spectral properties of the samples before and after acidification was characterized by solid diffuse reflectance spectroscopy. The results showed that the prepared samples have well crystalline and obvious layered structure. The spectroscopic response had been redshifts after acidification of the sample, which can improve the availability of sunlight.