Room-temperature synthesis of flower-like BiOX (X=Cl, Br, I) hierarchical structures and their visible-light photocatalytic activity

Lang Chen, Rui Huang, Miao Xiong, Qing Yuan, Jie He, Jing Jia, Meng Yuan Yao, Sheng Lian Luo, Chak Tong AU, Shuang Feng Yin*

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

163 Citations (Scopus)


A simple method for facile synthesis of three-dimensional (3D) bismuth oxyhalide (BiOX, X=Cl, Br, I) hierarchical structures at room temperature has been developed. Under the influence of l-lysine surfactant, the bismuth and halogen (Cl, Br, I) sources hydrolyze and self-assemble into flower-like hierarchical architectures within 10 min. The resulted materials were characterized by XRD, FESEM, TEM, UV-vis DRS, and N2 adsorption-desorption techniques. We found that l-lysine is indispensable for their formation and the amount of HX has great effect on the final morphology. The BiOX (X=Cl, Br, I) hierarchical architectures are composed of single-crystalline nanoplates. We propose an amino-and-carboxyl structure-directing mechanism for the formation of the hierarchical structures. To evaluate the photocatalytic activity of the as-prepared materials, rhodamine-B was employed as a probe dye for degradation under visible light. All of the BiOX (X=Cl, Br, I) with 3D architectures show higher photocatalytic activities than their sheet-like counterparts. The superior activity is ascribed to the better light-harvesting capacity of the 3D hierarchical structures. The adopted method can be applied for large-scale generation of novel structures of similar kinds in a facile manner.

Original languageEnglish
Pages (from-to)11118-11125
Number of pages8
JournalInorganic Chemistry
Issue number19
Publication statusPublished - 7 Oct 2013

Scopus Subject Areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry


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