کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1334160 979152 2005 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis of ultraviolet luminescent turbostratic boron nitride powders via a novel low-temperature, low-cost, and high-yield chemical route
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Synthesis of ultraviolet luminescent turbostratic boron nitride powders via a novel low-temperature, low-cost, and high-yield chemical route
چکیده انگلیسی

A novel chemical route has been established for the synthesis of ultraviolet luminescent turbostratic boron nitride (t-BN) powders, by the reaction of NH4BF4 with NaNH2 at 320 °C for 10 h, and the yield is as high as 90%. The synthesized brown–yellow samples were characterized by XRD, XPS, FT-IR, SAED, and HRTEM, which matched with t-BN. The electronic and optical properties of the product were investigated by PL and UV absorption. UV spectra revealed that the product has two obvious band gaps (∼5.8 and 4.6 eV) and PL spectra showed that it has an ultraviolet emission at 337 nm (λex=260nm). SEM image indicated that the particle size of the synthesized t-BN is mainly in the range of 1–10 μm. The renascent BF3 and Na3N intermediates are believed to be responsible for the growth of t-BN under mild conditions.

A novel chemical route has been established for the synthesis of ultraviolet luminescent turbostratic boron nitride (t-BN) powders by the reaction of NH4BF4 with NaNH2 at 320 °C for 10 h in yield as high as 90%.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Solid State Chemistry - Volume 178, Issue 6, June 2005, Pages 1925–1928
نویسندگان
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