Citation: XU Zheng-Xia, YANG Ji-Tao, LIU Kang, GUO Xiao-Qiang. Shape Evolution Behavior of Anatase Titania Nanocrystals via the Solvothermal Method[J]. Acta Physico-Chimica Sinica, ;2016, 32(2): 581-588. doi: 10.3866/PKU.WHXB201512014 shu

Shape Evolution Behavior of Anatase Titania Nanocrystals via the Solvothermal Method

1.
1 College of Civil Engineering & Mechanics, Yanshan University, Qinhuangdao 066004, Hebei Province, P. R. China;
2.
2 School of Energy and Environment Engineering, Zhongyuan University of Technology, Zhengzhou 450007, P. R. China

Corresponding author: XU Zheng-Xia,
Received Date: 16 September 2015
Available Online: 30 November 2015
Fund Project: 国家自然科学基金(51408528) (51408528)河北省自然科学基金(E2014203089)资助项目 (E2014203089)

Anatase titania nanocrystals with different shapes were successfully 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 gradually evolve from spheres to rods with increasing dodecyl amine content (at constant total molar content of lauric acid and dodecyl amine). The crystallinity 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%.
- Anatase,
- Titania nanocrystal,
- Solvothermal method,
- Nanorod,
- Shape control
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