【摘要】 分别采用TritonX-100/正己醇/环己烷/水和CTAB/正己醇/水两种微乳液体系制备纳米TiO2/S iO2复合物,并对所得样品进行了表征:热重-差热分析得出晶形转变温度;XRD分析说明产物为锐钛矿结构;TEM观察了其颗粒形态和粒径;并将所得样品与商品二氧化钛的FT-IR红外光谱进行了对比.通过实验对所得样品和商品二氧化钛的性能进行了评价和对比,结果表明:由CTAB体系制得的样品对光的吸收能力、对碱性品红的降解活性以及对碱性品红CODC r去除能力都是最优的.更多还原

【Abstract】 Nanosized SiO2/ TiO2 particles were prepared in two microemulsion systems,Triton X-100/n-hexanol/ cyclohexane/ water and CTAB/ n-hexanol/water respectively.The particles were characterized by TG-DSC,XRD,TEM and FT-IR.The transformation temperature of the crystallite was analyzed by TG-DSC.The crystalline phases of the particles were recognized by XRD analysis.The morphology and size of the particles were observed by TEM.Fourier transform infrared spectroscopy(FT-IR) of the product was compared with the commercial titania.The performances of the prepared SiO2/ TiO2 particles with CTAB and Triton X-100 as a catalyst in degradation of basic violet by near UV light were evaluated and compared,and the results show that the photo absorptivity,the degradation activity and CODCr removal capability to basic violet of the product from the CTAB system are very well.更多还原