摘要
Nanoparticles of Ce0.6Zr0.35Y0.05O2 (CZY) solid solution have been prepared by the CTAB (hexadecyl-trimethyl ammonium bromide), CTAB-EG (ethylene glycol) templating, and CTAB-EG-NaCl (in which the pores of the precursor synthesized by the CTAB-EG method is filled by a certain amount of NaCl) method, respectively. The physical properties of these materials were characterized by means of tech-niques such as X-ray diffraction (XRD), high resolution scanning electron microscopy (HRSEM), transmission electron microscopy (TEM), selected area electron diffraction (SAED), and N2 adsorp-tion-desorption measurements. The CZY samples synthesized by the above three methods display wormhole-like mesoporous morphology and cubic crystal structures. The materials are narrow in pore size distribution (averaged pore diameter = 5.3―7.1 nm), high in surface areas (95―119 m2/g), and large in pore volumes (0.16―0.18 cm3/g). It has been demonstrated that the introduction of NaCl is capable of retaining the pore structures of solid nanomaterials at high-temperature calcination.
Nanoparticles of Ce0.6Zr0.25Y0.05O2 （CZY） solid solution have been prepared by the CTAB （hexadecyltrimethyl ammonium bromide）, CTAB-EG （ethylene glycol） templating, and CTAB-EG-NaCl （in which the pores of the precursor synthesized by the CTAB-EG method is filled by a certain amount of NaCl） method, respectively. The physical properties of these materials were characterized by means of tech- niques such as X-ray diffraction （XRD）, high resolution scanning electron microscopy （HRSEM）, transmission electron microscopy （TEM）, selected area electron diffraction （SAED）, and N2 adsorption-desorption measurements. The CZY samples synthesized by the above three methods display wormhole-like mesoporous morphology and cubic crystal structures. The materials are narrow in pore size distribution （averaged pore diameter = 5.3-7.1 nm）, high in surface areas （95-119 m^2/g）, and large in pore volumes （0.16-0.18 cm^3/g）. It has been demonstrated that the introduction of NaCl is capable of retaining the pore structures of solid nanomaterials at high-temperature calcination.
基金
the National Natural Science Foundation of China (Grant No. 20473006) and PHR (IHLB)
关键词
固溶体
同质晶体结构
合成方法
微粒
铈
稀土元素
Ce0.5Zr0.35Y0.05O2 solid solution, templating synthesis method, wormhole-like mesoporous framework, NaCl filler, rare earth
