Rapid microwave-assisted hydrothermal synthesis of Bi₁₂TiO₂₀ hierarchical architecture with enhanced visible-light photocatalytic activities

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• 作者：Zhuo Yang ; Huiqing Fan ; Xin Wang ; Changbai Long
• 关键词：A. Nanostructures ; A. Oxides ; B. Chemical synthesis ; D. Optical properties
• 刊名：Journal of Physics and Chemistry of Solids
• 出版年：2013
• 出版时间：December, 2013
• 年：2013
• 卷：74
• 期：12
• 页码：1739-1744
• 全文大小：2076 K

文摘

Flower-like Bi₁₂TiO₂₀ hierarchical nanostructures composed of numerous nanobelts were synthesized at 180 ¡ãC within 1 h by a microwave-assisted hydrothermal method in the presence of cetyltrimethylammonium bromide (CTAB) for the first time. The as-prepared products were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and ultraviolet-visible (UV-vis) absorption spectroscopy. Furthermore, the hierarchical Bi₁₂TiO₂₀ nanostructures exhibited higher photocatalytic activities in the degradation of Rhodamine B under visible-light irradiation than that of the samples prepared without CTAB. In addition, the role of CTAB cationic surfactant has been investigated thoroughly and a possible mechanism is proposed.