期刊
MATERIALS RESEARCH BULLETIN
卷 107, 期 -, 页码 80-86出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2018.07.012
关键词
Aspect ratio; Titania; Anatase; Solvothermal; Photocatalysis
资金
- National Natural Science Foundation of China [51408528]
- Natural Science Foundation of Hebei Province, China [E2014203089]
- outstanding youth project of Hunan Provincial Education Department [16B236]
Anatase TiO2 nanoparticles with tuning size and aspect ratio were successfully prepared by a simple solvothermal method, using ethanol as a solvent, titanium butoxide as a precursor, and oleic acid and oleylamine as anionic and cationic capping agents, respectively. The average size and aspect ratio of these nanoparticles can be greatly regulated by varying the oleic acid/oleylamine molar ratio while keeping their total molar content constant and finely adjusted by increasing the total capping agents molar concentration in solvent at constant molar ratio (oleic acid/oleylamine molar ratio = 1:1). The variation of molar ratio or molar concentration enables a manipulation of the growth rate along different facets of TiO2 nanoparticles and, consequently, a control of the aspect ratio of these nanoparticles. Moreover, the photocatalytic degradation rate of methyl blue for sample prepared with molar ratio of oleic acid to oleylamine at 6:24 is over 11% higher than that for the other samples.
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