分别以乙腈、氯仿和甲酰胺为溶剂,十八胺为模板剂,通过非氧化物溶胶-凝胶过程合成了多种形貌的氮化硅基纳米孔材料。利用X射线衍射(X-ray d iffraction,XRD)、透射电子显微镜(T ransm iss ion e lectronm icroscope,TEM)、N2吸附-脱附和电子能谱(Energy d ispers ive spectroscope,EDS)对样品进行了表征。XRD结果显示产物是层间距为4.7 nm和3.6 nm的层状相材料。TEM照片表明,在乙腈、氯仿和甲酰胺溶剂中分别得到花状、片状和核-环状形貌的氮化硅基材料。N2吸附-脱附分析表明,产物具有较高的比表面积和窄的孔径分布。EDS分析证明,产物含有S i,N,C,C l元素而不含有O元素。非水体系中表面活性剂自组装形成的介观相可以作为模板来指导具有特殊介观结构和形貌的纳米材料的合成。
Porous metallic nickel has been synthesized using SiO2 opal as template. The template was prepared by self-assembled sedimentation of monodispersed SiO2 spheres. The metallic nickel precursor was impregnated into the void of the SiO2 opal template. The precursor transferred to metallic nickel after calcination in the nitro- gen atmosphere. Then, the SiO2 opal template was removed and three-dimensional porous metallic nickel with a meso-/macroporous structure was obtained. The as-synthesized samples were characterized by XRD, FESEM and nitrogen adsorption-desorption methods.
Nanoporous gamma aluminum oxide (γ-Al2O3) was synthesized by solvothermal method in the presence of AlCl·36H2O, urea and alcohol. The calcined sample was characterized by XRD, FTIR, TEM, and Nitrogen ad- sorption-desorption measurement. Results show that the obtained γ-Al2O3 is well-dispersed nanoparticles with par- ticle size of 4￣7 nm and the product has nano-pore structure with a narrow pore size distribution of 5￣20 nm.
