Bi-Ba-Fe-O-Cl棱柱形微米-纳米管

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

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 .

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 mn 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 and c=2. 972(2)nm(to see Fig. 1 similar to2 and Table 1). It possesses semiconducting properties. From curve log(1/p) similar to 1/T, its energy gap is E(g)approximate to1.2 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.