CAJ | 학술논문

以锐钛矿TiO_2为起始原料,通过水热法制备了钛酸盐纳米棒,对合成不同长度和宽度的钛酸盐纳米棒的影响和控制条件进行了研究.用X射线衍射(XRD)和扫描电子显微镜(SEM)对纳米棒的形貌和结构进行了表征.结果表明水热温度和处理时间能对纳米棒的形貌和结构进行有效的控制,得到理想的钛酸盐的结构.在更高的温度下(200℃),钛酸盐纳米管将更快的转化为纳米棒,而随着处理时间的延长,其形貌结构发生有规律的变化.在96 h处理时间后纳米棒束的宽度为50 nm到1μm,长度可以达到几十微米.对后处理中酸洗对产物的形貌和晶体结构的影响也进行了对比研究,发现在酸洗之前钛酸盐纳米棒结构就已经形成,但是酸洗能使产物的晶体结构产生变化,同时使纳米棒的表面形貌更加光滑规整.最后对比研究原料和产物的紫外-可见吸收光谱,发现纳米管/棒在250至350 nm处有宽带隙吸收.
이예태광TiO_2위기시원료,통과수열법제비료태산염납미봉,대합성불동장도화관도적태산염납미봉적영향화공제조건진행료연구.용X사선연사(XRD)화소묘전자현미경(SEM)대납미봉적형모화결구진행료표정.결과표명수열온도화처리시간능대납미봉적형모화결구진행유효적공제,득도이상적태산염적결구.재경고적온도하(200℃),태산염납미관장경쾌적전화위납미봉,이수착처리시간적연장,기형모결구발생유규률적변화.재96 h처리시간후납미봉속적관도위50 nm도1μm,장도가이체도궤십미미.대후처리중산세대산물적형모화정체결구적영향야진행료대비연구,발현재산세지전태산염납미봉결구취이경형성,단시산세능사산물적정체결구산생변화,동시사납미봉적표면형모경가광활규정.최후대비연구원료화산물적자외-가견흡수광보,발현납미관/봉재250지350 nm처유관대극흡수.
Titanate nanotubes and nanoribbons were synthesized hydrothermally, using anatase TiO_2 as the starting material. The dependence of titanate nanoribbons length and width on control conditions was studied. The phase structure and the morphology were characterized by XRD and SEM. The results show that the morphology and the structure of titanate nanoribbons are controllable via changing the hydrothermal temperature and treatment duration of the titanate products. At higher temperature of 200 ℃, titanate nanotube are transformed faster to nanoribbons and the morphologies are changed as a function of treatment duration. After the treatment duration goes up to 96 h, bundles of titanate nanoribbons are formed with widths ranging from 50 nm to 1 μm and lengths up to tens of micrometers. Control experiments results show that the nanoribbons are formed before acid wash, but the morphology is more smooth and ordered after wash, and the crystal structure is changed during the acid wash process.