CdS-TiO_2/累托石复合材料的制备及光催化性能

Preparation of CdS-TiO_2/Rectorite Nanocomposite and Its Photocatalytic Property

采用原位插层法制备了CdS-TiO2/累托石纳米复合材料.以X射线粉未衍射、电镜、红外光谱、漫反射吸收光谱及液氮吸附比表面积测定等方法对其微结构和性能进行了分析与表征.并以罗丹明B(RB)为模拟有机污染物,对比研究了累托石、TiO2/累托石与CdS-TiO2/累托石的吸附和光催化性能.结果表明,与累托石相比,CdS-TiO2/累托石具有更复杂的多孔结构、更大的孔体积和比表面积以及更有效的光吸收能力;该类复合材料表现出良好的吸附性能和光催化降解活性.

CdS-TiO2/rectorite nanocomposite was obtained through in-situ intercalation-exfoliation process of CdS-TiO2.The microstructures and properties of the CdS-TiO2/rectorite were characterized by means of X-ray powder diffraction（XRD）,transmission electron microscopy（TEM）,Fourier transform infrared spectroscopy（FTIR）,diffuse reflectance absorbance spectroscopy（DRS） and nitrogen adsorption-desorption measurement.The adsorption and photocatalytic properties of rectorite,TiO2/rectorite and CdS-TiO2/rectorite nanocompo-sites were comparatively investigated by Rhodamine B（RB） as simulated organic pollutant.The experimental results show that the CdS-TiO2/rectorite nanocomposite exhibits more complicated porous structure,larger pore volume,specific surface area and more effective optical absorptivity,and therefore stronger adsorption ability and higher photocatalytic degradation activity as compared to the rectorite.The above results show a promising route for the application of the rare mineral rectroite.