کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
612552 880701 2006 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Decoration carbon nanotubes with Pd and Ru nanocrystals via an inorganic reaction route in supercritical carbon dioxide–methanol solution
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Decoration carbon nanotubes with Pd and Ru nanocrystals via an inorganic reaction route in supercritical carbon dioxide–methanol solution
چکیده انگلیسی

This work describes a method to decorate carbon nanotubes (CNTs) with metallic Pd and Ru nanocrystals via inorganic reactions in supercritical (SC) CO2–methanol solutions. In this route, PdCl2 or RuCl3⋅3H2O dissolved in SC CO2–methanol solution acted as a metal precursor and CNTs functioned as a template to direct the deposition of produced nanoparticles. Methanol served as the reductant for the precursors as well as cosolvent to enhance the dissolution of precursors in SC CO2. Dry products were readily obtained through in situ extraction with SC CO2 after reactions. The products were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, and transmission electron microscopy. It was demonstrated that the loading content and particle size of the nanoparticles deposited on CNTs could be tuned by changing the weight ratio of the precursor to CNTs. This simple and efficient approach may also be utilized to synthesize other high-purity materials using inorganic salt precursors in SC CO2-based solution.

The metal (Pd, Ru)-carbon nanotube (CNT) nanocomposites have been fabricated in supercritical CO2–methanol solutions using PdCl2 and RuCl3⋅3H2O as a precursor, respectively. The loading content and particle size of the nanoparticles deposited on CNTs could be readily tuned by changing the weight ratio of the precursor to CNTs. This simple and efficient approach may be extended to synthesize other metal–CNT composites, which opens up avenues for further exploration of the properties of CNT-based composites.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Colloid and Interface Science - Volume 304, Issue 2, 15 December 2006, Pages 323–328
نویسندگان
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