摘要
Layered nanocomposite materials containing rare earth elements, titanium dioxide and bentonite (RE/TiO_2/Bent) were prepared by ion exchange technique with titanium tetrachloride and cerium nitrate as main precursors, and ethanol absolute as solvent. Their preparation, technical parameters, and mechanism of rare earth elements were studied. The results show that the interplanar distance d_ 100 of bentonite increases from 0.96781 nm of original bentonite to 1.88655 nm when ethanol absolute acts as solvent. The interaction between rare earth ions and titanium ions has an effect on titanium ions exchange. When Ce/Ti (in molar ratio)=0.1, rare earth elements are advantageous to the transfer of titanium ions to the interlayers of bentonite; when Ce/Ti=0.2, the action of rare earth elements is not evident; when Ce/Ti=0.4, the rare earth elements are disadvantageous to the preparation of nanocomposite materials.
Layered nanocomposite materials containing rare earth elements, titanium dioxide and bentonite (RE/TiO_2/Bent) were prepared by ion exchange technique with titanium tetrachloride and cerium nitrate as main precursors, and ethanol absolute as solvent. Their preparation, technical parameters, and mechanism of rare earth elements were studied. The results show that the interplanar distance d_ 100 of bentonite increases from 0.96781 nm of original bentonite to 1.88655 nm when ethanol absolute acts as solvent. The interaction between rare earth ions and titanium ions has an effect on titanium ions exchange. When Ce/Ti (in molar ratio)=0.1, rare earth elements are advantageous to the transfer of titanium ions to the interlayers of bentonite; when Ce/Ti=0.2, the action of rare earth elements is not evident; when Ce/Ti=0.4, the rare earth elements are disadvantageous to the preparation of nanocomposite materials.
基金
ProjectsupportedbytheNationalNaturalScienceFoundationofHebeiProvince(503067)
