摘要
将钛酸四丁酯前驱体加入N,N-二甲基甲酰胺(或乙醇),醋酸和醋酸锂的混合溶液中,采用溶剂热法直接制备了大长径比的二氧化钛纳米结构。利用透射电子显微镜、选区电子衍射和X射线衍射等技术对二氧化钛纳米结构的形貌、尺寸、形状和晶体形态进行了表征,并探讨了改变反应混合物溶剂对所生成的二氧化钛微观结构的影响。结果表明:用溶剂热法可以直接获得长径比可调的二氧化钛纳米结构;将N,N-二甲基甲酰胺替换为乙醇,二氧化钛纳米结构由长径比可达100的纳米线变成长径比小于20的纳米棒;无论溶剂选用N,N-二甲基甲酰胺或选用乙醇,当反应温度由180℃提高到200℃后,所获的二氧化钛纳米结构的晶体形态由锐钛矿型转变为锐钛矿型与金红石型混合相。
Adding tetrabutyl titanate precursor to N, N - dimethyl formamide （or ethanol）, the mixed solution of acetic acid and lithium acetate by solvent thermal method of direct with large length to diameter ratio of TiO2 nanostructures were prepared. Using transmission electron microscopy, selected area electron diffraction and X-ray diffraction technology, titanium dioxide nanostructure morphology, size, shape and crystal morphology were characterized, and explored the impact of changes in the reaction mixture solvent of the generated TiO2 mi- crostructure. The results show that by solvothermal method can have direct access to the length to diameter ratio adjustable TiO2 nanostruetures; N, N- dimethylformamide replacement for ethanol, titanium dioxide nanostructure by the length to diameter ratio can reach 100 nanowires into length to diameter ratio is less than 20 nanorods; regardless of solvent selection of N, N- dimethylformamide or use alcohol, when the reaction temperature by 180℃to 200 ℃, crystal morphology of the obtained TiO2 nanostructures by anatase change for anatase and rutile mixed phase.
作者
徐正侠
刘康
郭小强
XU Zhengxia LIU Kang GUO Xiaoqiang(College of Civil Engineering ＆ Mechanics ,Yanshan University, Qinhuangdao 066004, Chin)
出处
《邵阳学院学报（自然科学版）》
2016年第4期55-60,共6页
Journal of Shaoyang University：Natural Science Edition
基金
河北省自然科学基金资助项目(E2014203089)
河北省科技计划项目(13273706)
国家自然科学基金资助项目(51408528)
关键词
二氧化钛
纳米线
溶剂热法
纳米棒
titanium dioxide
nanowires
solvent thermal method
nanorod
