Formation and Growth of Bi2Te3 in Biomolecule-Assisted Near-Critical Water: In Situ Synchrotron Radiation Study

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• 作者：Jian-Li Mi ; Mogens Christensen ; Christoffer Tyrsted ; Kirsten Ø ; . Jensen ; Jacob Becker ; Peter Hald ; Bo B. Iversen
• 刊名：Journal of Physical Chemistry C
• 出版年：2010
• 出版时间：July 22, 2010
• 年：2010
• 卷：114
• 期：28
• 页码：12133-12138
• 全文大小：279K
• 年卷期：v.114,no.28(July 22, 2010)
• ISSN：1932-7455

文摘

A novel “green” chemical route was designed to prepare nanostructured Bi₂Te₃ in near-critical water using the biomolecule alginic acid as reductant. The supercritical or near-critical synthesis gives a rapid method for the preparation of nanomaterials, and the formation of Bi₂Te₃ can be finished within several minutes. The formation and growth of Bi₂Te₃ was studied by in situ synchrotron radiation powder X-ray diffraction (SR-PXRD). Comprehensive in situ experiments give direct evidence of the phase formation and grain growth of Bi₂Te₃. Near-critical preparation of Bi₂Te₃ results in nanoscale particles with a plateletlike structure. The concentration of NaOH appears to play a crucial role on the particle size while it is little affected by the synthesis temperature.