Bi-Ba-Fe-O-Cl棱柱形微米-纳米管

用固体反应直接生长法合成一种过渡金属氯氧化合物无机纳米 微米管.它具有特殊的四方棱柱外形.根据SEM测定，该纳米微米管外径为100～500 nm, 有的更小，内径是外径的五分之三,约60－300 nm.根据XRD、TEM 和SEM测定，这种纳米微米管晶体属于正交晶系，其晶格常数为a=0.5864(2)nm, b=0.6032(2)nm, c=2.972(2)nm.具有半导体性质. 由log(1/ρ)～1/T关系获得其能隙Eg=1.2 eV.它制备简捷，成本低廉，可做为高科技领域的微电子元件.

Bi-Ba-Fe-O-Cl Micro-nanotube of Tetragonal Prism Crystal

A micro nanotube of new inorganic compound with external shape of tetragonal prism has been synthesized. It is made of transitional metal oxychloride. From SEM detection, the micro nanotube has an external diameter of 100－500 nm and an internal diameter of 60－300 nm. Its wall is very thin, 20－70 nm, and its length is from a dozen micro to dozens of microns(to see Fig.1(a d)). It has been prepared by solid state reaction in a direct growth way. 　　From XRD, TEM and SEM determination, the micro nanotube crystal belongs to orthorhombic system and its lattice constants are a=0.5864(2)nm, b=0.6032(2)nm andc=2.972(2)nm(to see Fig.1～2 and Table 1). It possesses semiconducting properties. From curve log(1/ρ)～1/T, its energy gap isEg≈1.2 eV(to see Fig.3). The micro nanotube material will be a prospect material used as catalysts, material to store gases or energy, and material used as electrode in photoelectric cell and photoelectrolytic cell. 　　Additionally, the preparation of the micro nanotube material by solid state reaction is simple in operation and cheap in cost.