物理化学学报Issue(2)：581-588,8.DOI:10.3866/PKU.WHXB201512014
溶剂热法合成锐钛矿型二氧化钛纳米晶的形状演化规律
Shape Evolution Behavior of Anatase Titania Nanocrystals via the Solvothermal Method
摘要
Abstract
Anatase titania nanocrystals with different shapes were successful y prepared by a solvothermal method, using titanium butoxide as a precursor, ethanol as a solvent, and lauric acid and dodecyl amine as stabilizing agents. The structure, size, morphology, and shape of the nanocrystals were characterized by transmission electron microscopy (TEM), selected area electron diffraction (SAED), X-ray diffraction (XRD), Fourier transmission infrared (FTIR) spectroscopy, and thermogravimetric-differential thermal analysis (TG-DTA). We discuss how the ratio of lauric acid to dodecyl amine can influence the shape of nanocrystals. XRD results indicate that the phase of titania nanocrystals synthesized under different conditions is pure anatase. The shapes of titania nanocrystals gradual y evolve from spheres to rods with increasing dodecyl amine content (at constant total molar content of lauric acid and dodecyl amine). The crystal inity of anatase titania nanocrystals prepared at a molar ratio of 1:1 (lauric acid to dodecyl amine) was better than that of nanocrystals prepared at other molar ratios. The stabilizing agents and nanocrystal core were combined by a bridging coordination ligand, and the content of stabilizing agents in samples was about 5%.关键词
锐钛矿/二氧化钛纳米晶/溶剂热法/纳米棒/形状控制Key words
Anatase/Titania nanocrystal/Solvothermal method/Nanorod/Shape control分类
化学化工引用本文复制引用
徐正侠,杨继涛,刘康,郭小强..溶剂热法合成锐钛矿型二氧化钛纳米晶的形状演化规律[J].物理化学学报,2016,(2):581-588,8.基金项目
The project was supported by the National Natural Science Foundation of China (51408528) and Natural Science Foundation of Hebei Province, China (E2014203089).国家自然科学基金(51408528)和河北省自然科学基金(E2014203089)资助项目 （51408528）
