EDTA-modified hydrothermal synthesis of a novel four-leaf clover-shape BiOBr microstructure

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• 作者：Xuelei Wang ; Jun Yang ; Yuanyuan Chen ; Yuanming Zhang ; Yu Tang
• 关键词：Ceramics ; Crystal growth ; Nanoparticles ; Semiconductors
• 刊名：Materials Letters
• 出版年：1 February, 2014
• 年：2014
• 卷：116
• 期：Complete
• 页码：171-174
• 全文大小：848 K

文摘

A novel four-leaf clover-shape BiOBr microstructure has been successfully synthesized by EDTA-modified hydrothermal approach for the first time, and characterized by XRD, SEM, and UV-vis. A series of controlling experiments indicate that the shape and size of as-synthesized BiOBr architectures can be tuned effectively by controlling the reaction conditions, such as reaction time, bromine source, synthesis method and organic additives. Based on experiment results, a possible formation mechanism for the novel four-leaf clover-shape BiOBr has been presented in detail. Ethylenediaminetetraacetic acid (EDTA) and cetyltrimethylammonium bromide (CTAB) have a markedly impact on the morphology of the BiOBr, and the synergistic effect of EDTA and CTAB is responsible for the synthesis of four-leaf clover-shape BiOBr microstructures. In addition, we investigated the photocatalytic activity of the as-synthesized BiOBr on the degradation of Rhodamine B (RhB) in aqueous solution under visible-light irradiation (位>400 nm). The results showed that the as-synthesized BiOBr sample exhibited excellent photocatalytic activity.