One-Step Controllable Synthesis for High-Quality Ultrafine Metal Oxide Semiconductor Nanocrystals via a Separated Two-Phase Hydrolysis Reaction

详细信息    查看全文

• 作者：Kangjian Tang ; Jianan Zhang ; Wenfu Yan ; Zhonghua Li ; Yangdong Wang ; Weimin Yang ; Zaiku Xie ; Taolei Sun ; Harald Fuchs
• 刊名：Journal of the American Chemical Society
• 出版年：2008
• 出版时间：February 27, 2008
• 年：2008
• 卷：130
• 期：8
• 页码：2676 - 2680
• 全文大小：337K
• 年卷期：v.130,no.8(February 27, 2008)
• ISSN：1520-5126

文摘

A one-step synthesis method is described to prepare high-quality ultrafine inorganic semiconductornanocrystals via a two-phase interface hydrolysis reaction under hydrothermal conditions. With the synthesisof ZrO₂ quantum dots as an example, we show that the prepared nanocrystals have good monodispersityand high crystallinity, as well as other related superior properties, e.g., strong photoluminescence andexcellent photocatalytic activities. Also the crystal size can be conveniently adjusted in the range below 10nm through controlling the reaction temperature. Besides that, this method also shows other distinctadvantages compared with other methods reported previously. First, the preparation process is simpleand cheap and does not contain any complicated posttreatment procedure. Second, products (withoutcoating) can be collected from the organic phase which effectively avoids grain aggregation induced bythe capillary concentration in the water environment. Third, the production yield is very high (almost 100%)and the organic and water phases after reaction can be easily recycled for next reaction. Therefore, itprovides a promising strategy for the large-scale industrial production of different kinds of high-qualityinorganic nanocrystals.