کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1329199 978894 2009 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Direct low-temperature synthesis of RB6 (R=Ce, Pr, Nd) nanocubes and nanoparticles
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Direct low-temperature synthesis of RB6 (R=Ce, Pr, Nd) nanocubes and nanoparticles
چکیده انگلیسی

Rare-earth hexaborides (RB6, R=Ce, Pr, Nd) nanocrystals were prepared by a facile solid state reaction in an autoclave. Single-crystalline RB6 nanocubes were fabricated at 500 °C starting from B2O3, RCl3·6H2O and Mg powder. RB6 nanoflakes and nanoparticles could be obtained around 400 °C using NaBH4 as boron resource. XRD patterns show that all of the hexaborides are cubic phase with high crystallinity and high purity and have lattice parameters that are consistent with nearly stoichiometric products. Raman spectra elucidate the active vibrational modes of the hexaborides. The TEM and FESEM images clearly show that the nanocubes have an average size of 200 nm and nanoparticles of 30 nm. Our experiment developed an efficient, simple and low-cost route to prepare RB6, which could be extended further to the preparation of other rare-earth metal hexaborides.

FESEM images of CeB6 nanocubes prepared at 500 °C for 12 h using B2O3 as boron resource.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Solid State Chemistry - Volume 182, Issue 11, November 2009, Pages 3098–3104
نویسندگان
, , , , , , ,