Synthesis and Photocatalytic Activity of Single-Crystalline Hollow rh-In2O3 Nanocrystals

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• 作者：Jiefu Yin ; Huaqiang Cao
• 刊名：Inorganic Chemistry
• 出版年：2012
• 出版时间：June 18, 2012
• 年：2012
• 卷：51
• 期：12
• 页码：6529-6536
• 全文大小：555K
• 年卷期：v.51,no.12(June 18, 2012)
• ISSN：1520-510X

文摘

We report here for the first time the hollow, metastable, single-crystal, rhombohedral In₂O₃ (rh-In₂O₃) nanocrystals synthesized by annealing solvothermally prepared InOOH solid nanocrystals under ambient pressure at 400 掳C, through a mechanism of the Kirkendall effect, in which pore formation is attributed to the difference in diffusion rates of anions (OH^{鈥?/sup> and O2鈥?/sup>) in a diffusion couple. The InOOH solid nanocrystals were prepared via a controlled hydrolysis solvothermal route by using In(NO₃)₃路4.5H₂O as a starting material and glycerol鈥揺thanol as a mixed solvent. The glycerol鈥揺thanol mixed solvent plays a key role on the formation of the intermediate InOOH, thus the final product of rh-In₂O₃. The as-synthesized In₂O₃ nanocrystals present excellent photocatalytic degradation of rhodamine B (RhB) and methylene blue (MB) dyes, which present 92% degradation of RhB or MB after 4 or 3 h reaction in the presence of the as-synthesized In₂O₃ nanocrystals, respectively.}