Aerosol-Assisted Combustion Synthesis of Single-Crystalline NaSbO3 Nanoplates: A Topotactic Template for Ilmenite AgSbO3

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• 作者：Dennis P. Chen ; William Bowers ; Sara E. Skrabalak
• 刊名：Chemistry of Materials
• 出版年：2015
• 出版时间：January 13, 2015
• 年：2015
• 卷：27
• 期：1
• 页码：174-180
• 全文大小：436K
• ISSN：1520-5002

文摘

As properties of nanocrystals are size- and shape-dependent, synthetic routes that provide fine control over these structural parameters are required. Traditional solid-state reactions often yield a variety of crystallite morphologies and sizes due to limited control over precursor distribution. In ultrasonic spray synthesis, particle formation occurs within spatially and temporally confined droplets, and, as we show, nanoplates of ilmenite NaSbO₃ can be prepared by salt-assisted aerosol combustion. The NaSbO₃ nanoplates were used as topotactic templates to synthesize AgSbO₃ visible-light photocatalysts. The absolute conduction and valence band positions of AgSbO₃ nanoplates were deduced by UV鈥損hotoelectron spectroscopy and UV鈥搗isible diffuse reflectance spectroscopy. A comparative analysis of model photocatalytic reactions revealed that the surface chemistry and particle morphology were influential in the photocatalytic activity. Significantly, the integration of combustion chemistry and molten fluxes into ultrasonic spray syntheses should provide a general platform toward compositionally complex oxides as shape-defined nanocrystals.