BiOCl Sub-Microcrystals Induced by Citric Acid and Their High Photocatalytic Activities

详细信息    查看全文

• 作者：Kun Zhang ; Jie Liang ; Shan Wang ; Jie Liu ; Kuaixia Ren ; Xiao Zheng ; Hui Luo ; Yingjie Peng ; Xing Zou ; Xu Bo ; Jihong Li ; Xibin Yu
• 刊名：Crystal Growth & Design
• 出版年：2012
• 出版时间：February 1, 2012
• 年：2012
• 卷：12
• 期：2
• 页码：793-803
• 全文大小：765K
• 年卷期：v.12,no.2(February 1, 2012)
• ISSN：1528-7505

文摘

Bismuth oxychloride (BiOCl) sub-microcrystals with tunable morphologies from nanoflakes to hollow microspheres (HMSs) have been synthesized by hydrolyzing a hierarchical precursor (BiCl₃) in a solution of water and ethanol with the addition of poly(vinylpyrrolidone) (PVP) and citric acid. The obtained BiOCl possessed sub-microcrystals from single crystals to polycrystals. The formation of the nestlike and hollow structure was found to be induced by citric acid and PVP. The crystal growth and morphology control of BiOCl were explored. Interestingly, citric acid was utilized both as a crystal-growth-inducing agent and a structure-directing agent. The morphology and compositional characteristics of BiOCl were investigated by field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), Raman, and UV鈥搗is spectra. The photocatalytic activities of BiOCl with different structures have also been investigated by the degradation of Rhodamine-B (RhB) dye under ultraviolet light irradiation. The as-prepared BiOCl exhibited much higher photocatalytic activity than the comzmon one. In particular, the three-dimensional hierarchical structure such as microflowers and HMSs can effectively improve photocatalytic activity. The results show that BiOCl sub-microcrystals have promise as a novel material for photocatalytic applications.