Citation: LIU Xiao-Ling, SONG Ji-Mei, DONG Na, HU Gang, YANG Jie, SI Wei, LI Wen-Hui. Synthesis and Adsorption Properties of Squamous BiOBr/Bi₂WO₆[J]. Acta Physico-Chimica Sinica, ;2016, 32(7): 1844-1850. doi: 10.3866/PKU.WHXB201604142 shu

Synthesis and Adsorption Properties of Squamous BiOBr/Bi₂WO₆

School of Chemistry and Chemical Engineering, Anhui University, Hefei 230601, P. R. China

Received Date: 2 February 2016
Revised Date: 11 April 2016

Fund Project: The project was supported by the National Natural Science Foundation of China (21171002), Natural Science Foundation of Anhui Province, China (11040606M55), and Natural Science Foundation of Education Department of Anhui Province, China (KJ2010A015).

BiOBr/Bi₂WO₆ with squamous morphology is successfully prepared by a one-step hydrothermal method. BiOBr/Bi₂WO₆ is shown to be an ideal material for adsorption. The structure of BiOBr/Bi₂WO₆ is characterized by powder X-ray diffraction (XRD), X-ray photoelectron (XPS) spectroscopy, and Fourier transform infrared (FT-IR) spectroscopy, and the morphology is observed with scanning electron microscopy (SEM). The specific surface of BiOBr/Bi₂WO₆ is tested by a nitrogen adsorption/desorption surface area pore size distribution analyzer. According to the experiments with different concentrations of KBr and the SEM photos of BiOBr and Bi₂WO₆, the possible morphology formation mechanism of squamous BiOBr/Bi₂WO₆ is proposed. We design a series of adsorption experiments and test the adsorption properties of the compounds with organic dyes as adsorbent and BiOBr/Bi₂WO₆ as adsorbent. The results show that BiOBr/Bi₂WO₆ exhibits a higher adsorption capacity for cationic dyes, especially the adsorption rate of MB, and BiOBr/Bi₂WO₆ shows a higher adsorption capacity compared with that of activated carbon. Adsorption behavior of BiOBr/Bi₂WO₆ is consistent with the Freundlich isotherm model and the adsorption process of MB follows a pseudo-second-order kinetic model.
- Squamous,
- BiOBr/Bi₂WO₆,
- Adsorption,
- Morphology,
- Organic dye
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Synthesis and Adsorption Properties of Squamous BiOBr/Bi₂WO₆