کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1491031 992340 2010 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Large-scale fabrication of H2(H2O)Nb2O6 and Nb2O5 hollow microspheres
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Large-scale fabrication of H2(H2O)Nb2O6 and Nb2O5 hollow microspheres
چکیده انگلیسی

Hollow micro-sized H2(H2O)Nb2O6 spheres constructed by nanocrystallites have been successfully synthesized via a bubble-template assisted hydrothermal process. In the reaction process, H2O2 acts as a bubble generator and plays a key role in the formation of the hollow structure. An in situ bubble-template mechanism has been proposed for the possible formation of the hollow structure. The spherelike assemblies of these H2(H2O)Nb2O6 nanoparticles have been transformed into their corresponding pseudohexagonal phase Nb2O5 through a moderate annealing dehydration process without destroying the hierarchical structure. Optical properties of the as-prepared hollow spheres were investigated. It is exciting that the absorption edge of the hollow Nb2O5 microspheres shifts about 18 nm to the violet compared with bulk powders in the UV/vis spectra, indicating its superior optical properties.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Research Bulletin - Volume 45, Issue 3, March 2010, Pages 333–338
نویسندگان
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