期刊
APPLIED SURFACE SCIENCE
卷 355, 期 -, 页码 1028-1036出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2015.07.013
关键词
Nanocube titanium dioxide; Poly(3-octylthiophene); Self-assembly; Core/Shell structure; Electrokinetics; Surface functionalization
类别
资金
- Turkish Scientific and Technological Research Council (Tubitak) [111 T 637]
- COST Action [CM1101]
The aim of this study was to prepare a conducting nanocomposite from poly(3-octylthiophene, P30T) and nanocube-TiO2 particles. For this purpose, firstly nanocube-TiO2 particles were synthesized by hydrothermal method and then surface functionalized by the self assembly of 3-aminopropyltriethoxysilane and 3-thiophene acetic acid, respectively, to obtain covalently bonded nanocube-TiO2/P3OT core/shell nanocomposite. The samples were characterized by ATR FTIR spectroscopy, elemental analysis, TGA, XRD, XPS, SEM, TEM, contact angle, and conductivity measurements. Electrokinetic properties of nanocube-TiO2 and nanocube-TiO2/P3OT core/shell nanocomposite dispersions were determined by zeta(zeta)-potential measurements in aqueous medium by taking the effects of time, pH, various electrolytes, surfactants, and temperature into account. It was observed that pH was effective on the zeta-potentials of TiO2 in water; but showed slight changes with the presence of cationic (NaCl, BaCl2, AlCl3) and anionic (NaCi, Na2SO4) electrolytes. Increased pH values were observed to shift the zeta-potentials of TiO2/P3OT nanocomposite dispersions to more negative values. Further, effects of surfactants (sodium dodecyl sulfate, SDS, cetyltrimethylbromide, CTAB, TritonX-100) on the zeta-potentials of nanocube-TiO2 and nanocube-TiO2/P3OT nanocomposite dispersions were examined. (C) 2015 Elsevier B.V. All rights reserved.
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