کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5362436 1388285 2009 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Surfactant-assisted reflux synthesis, characterization and formation mechanism of carbon nanotube/europium hydroxide core-shell nanowires
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Surfactant-assisted reflux synthesis, characterization and formation mechanism of carbon nanotube/europium hydroxide core-shell nanowires
چکیده انگلیسی

Carbon nanotube (CNT)/europium hydroxide core-shell nanowires were prepared easily on a large scale under the boiling reflux of water assisted by the surfactant, sodium polystyrenesulfonate (SPS). The core-shell nanowires are characterized by transmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectrum. A possible formation mechanism has been suggested as follows: The phenyl rings of SPS can react with the carbon ring of CNTs to form the π-π noncovalent bond, which makes the SPS cover the surface of CNTs entirely, and thus the surface of modified CNTs is negatively charged, which repel with each other resulting in the good dispersion. In addition, the negatively charged surface of CNTs adsorbs europium ions (positive). The adsorbed europium ions in situ react with OH− ions to create europium hydroxide nanoparticles, and subsequently, the nanoparticles fuse together to form a dense coating layer on CNTs.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 255, Issue 19, 15 July 2009, Pages 8270-8275
نویسندگان
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