摘要
以硝酸铬和硝酸铈作金属源、用介孔氧化硅作硬模板,通过真空辅助浸渍法制备得到高比表面积有序介孔Cr2O3-Ce O2复合氧化物,采用XRD、TEM、UV-Vis和N2吸附-脱附技术表征了样品的物理化学性质.结果表明,经过500℃灼烧处理的样品(meso-Cr-Ce)孔壁晶化度高且虫孔结构发达,比表面积达160 m2/g,平均孔径为7.2 nm,在紫外和可见光区还具有优良的吸光性能.这些特性将使该材料在催化领域特别是光催化领域有着广阔的应用前景.
Highly surface area ordered mesoporous chromium oxide and cerium oxide composite（ meso- Cr- Ce） was synthesized via a vacuum assisted impregnation method with three dimensionally ordered mesoporous silica as hard template,chromium nitrate and cerium nitrate as metal sources. The physicochemical properties of meso- Cr- Ce were characterized by XRD,TEM,N2adsorption- desorption and ultraviolet visible diffuse reflectance spectroscopy. The results show that meso- Cr- Ce possessed a typical mesoporous structure with highly crystalline wall. Its surface area was up to 160 m^2/ g and the average pore size was ca. 7. 2 nm. The meso- Cr- Ce sample exhibits excellent UV and visible light responsive property,which would be useful in optical and catalytic applications.
出处
《渤海大学学报（自然科学版）》
CAS
2014年第4期379-384,共6页
Journal of Bohai University:Natural Science Edition
基金
国家自然科学基金项目(No:21076026)
辽宁省教育厅一般项目(No:L2013430)
关键词
介孔材料
复合氧化物
硬模板法
mesoporous material
mixed metal oxidation
hard-templating method
