Zr-Incorporated mesoporous titania materials were prepared via nonsurfactant templated sol-gel process of zirconium (IV) butoxide (ZBT) and titanium (IV) butoxide (TBT) in the presence of urea molecules as template or...Zr-Incorporated mesoporous titania materials were prepared via nonsurfactant templated sol-gel process of zirconium (IV) butoxide (ZBT) and titanium (IV) butoxide (TBT) in the presence of urea molecules as template or pore forming agent. The effects of template contents on the pore parameters of the materials synthesized with fixed Zr incorporation contents were investigated by nitrogen adsorption-desorption measurements, powder X-ray diffraction (XRD) study and transmission electron microscopy (TEM). The changes of template contents play significant roles on the pore parameters at low incorporation content of Zr. The pore diameters display a clear increase tendency with the increase of template contents. When high Zr incorporation content is used, the template contents have less effect on the pore diameters that almost keep unchanged with the increase of template contents. All the materials possess type IV isotherms with H 2 hysteresis loops suggesting the formation of mesophase. The materials with low Zr incorporation content have anatase structures; however, it can not be found in the materials with high Zr incorporation content. TEM images show that some accumulated inter-particulate pores and well-distributed worm-like pores are present in the Zr-incorporated materials.展开更多
基金ProjectsupportedbytheNationalNaturalScienceFoundationofChina (No .2 98740 0 2 ) ,theOutstandingYoungScientistAwardfromtheNationalNaturalScienceFoundationofChina (No .2 982 5 5 0 4) ,andtheGraduateSchoolofPekingUniversity .
文摘Zr-Incorporated mesoporous titania materials were prepared via nonsurfactant templated sol-gel process of zirconium (IV) butoxide (ZBT) and titanium (IV) butoxide (TBT) in the presence of urea molecules as template or pore forming agent. The effects of template contents on the pore parameters of the materials synthesized with fixed Zr incorporation contents were investigated by nitrogen adsorption-desorption measurements, powder X-ray diffraction (XRD) study and transmission electron microscopy (TEM). The changes of template contents play significant roles on the pore parameters at low incorporation content of Zr. The pore diameters display a clear increase tendency with the increase of template contents. When high Zr incorporation content is used, the template contents have less effect on the pore diameters that almost keep unchanged with the increase of template contents. All the materials possess type IV isotherms with H 2 hysteresis loops suggesting the formation of mesophase. The materials with low Zr incorporation content have anatase structures; however, it can not be found in the materials with high Zr incorporation content. TEM images show that some accumulated inter-particulate pores and well-distributed worm-like pores are present in the Zr-incorporated materials.
