CAJ | 학술논문

分别以板钛矿和锐钛矿型的TiO_2为先驱物水热合成钛酸铋亚微米棒.由X射线衍射、选区电子衍射以及Raman光谱的测量结果可知,合成的产品为Bi_4Ti_3O_(12). 源自板钛矿和锐钛矿的Bi_4Ti_3O_(12),其结构表现出明显的差异.在同样的条件下,Bi插入锐钛矿TiO_2的量多于其插入板钛矿TiO_2的量,从而导致部分X射线衍射峰向高角度方向稍微移动.保留下来的短Ti-O键限制了b-Bi_4Ti_3O_(12)亚微米棒沿[010]方向生长,使得b-Bi_4Ti_3O_(12)亚微米棒长度不均.
분별이판태광화예태광형적TiO_2위선구물수열합성태산필아미미봉.유X사선연사、선구전자연사이급Raman광보적측량결과가지,합성적산품위Bi_4Ti_3O_(12). 원자판태광화예태광적Bi_4Ti_3O_(12),기결구표현출명현적차이.재동양적조건하,Bi삽입예태광TiO_2적량다우기삽입판태광TiO_2적량,종이도치부분X사선연사봉향고각도방향초미이동.보류하래적단Ti-O건한제료b-Bi_4Ti_3O_(12)아미미봉연[010]방향생장,사득b-Bi_4Ti_3O_(12)아미미봉장도불균.
Bismuth titanate submicron-rods are synthesized by hydrothermal method using anatase and brookite nanocrystallites, respectively, as precursors. The results of XRD, SAED and Raman spetra indicate that two samples can be indexed to the same Bi_4Ti_3O_(12) phase. The corresponding products, a- and b-Bi_4Ti_3O_(12) submicron-rods, have distinct differences in structure. The cause for the shift of diffraction peaks is that the amount of Bi intercalated into anatase TiO_2 is larger than that into brookite TiO_2 under the same conditions. The multiple types of reserved short Ti-O bonds in b-Bi_4Ti_3O_(12) confine the growth of submicron-rods along the [010] orientation, which makes b-Bi_4Ti_3O_(12) submicron-rods uneven.