Enhanced photocatalytic activity of bismuth oxyiodine (BiOI) porous microspheres synthesized via reactable ionic liquid-assisted solvothermal method

Enhanced photocatalytic activity of bismuth oxyiodine (BiOI) porous microspheres synthesized via reactable ionic liquid-assisted solvothermal method
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通过可反应离子液体辅助溶剂热法合成的氧化碘铋(BiOI)多孔微球的增强光催化活性

DOI:
10.1016/j.colsurfa.2011.07.023
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发表时间:
2011-08
影响因子:
5.2
通讯作者:
Yin, Sheng
Yin, Sheng
中科院分区:
化学2区
文献类型:
--
作者:
Xia, Jiexiang;Xu, Li;Zhang, Qi;Xu, Hui;Li, Huaming;Yin, Sheng

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在离子液体1-丁基-3-甲基咪唑碘([bmim]I)和聚乙烯吡咯烷酮(PVP)存在下,通过egg辅助溶剂热法制备了均匀花状BiOI多孔微球。采用x射线衍射(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、能量色散x射线能谱(EDS)、氮吸收和漫反射光谱(DRS)对制备的样品进行了表征。在反应过程中,离子液体不仅可以作为I源,还可以作为制备BiOI多孔微球的模板。此外,对bii催化剂降解甲基橙(MO)的光催化活性实验表明,制备的bii多孔微球比bii纳米板具有更高的光催化活性。在此基础上,可以认为BiOI多孔微球的光催化活性增强可能归因于其能带结构、高的比表面积和高的表面体积比。
BiOI uniform flower-like porous microspheres have been successfully synthesized through an EG-assisted solvothermal process in the presence of ionic liquid 1-butyl-3-methylimidazolium iodine ([bmim]I) and polyvinyl-pyrrolidone (PVP). The as-prepared samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS), nitrogen sorption and diffuse reflectance spectroscopy (DRS). During the reactive process, ionic liquid not only acted as I source but also as template for the fabrication of BiOI porous microspheres. In addition, the photocatalytic activities experiments of BiOI catalyst on the degradation of methyl orange (MO) showed that as-prepared BiOI porous microspheres exhibited higher photocatalytic activity than that of BiOI nanoplates. On the basis of such analysis, it can be assumed that the enhanced photocatalytic activities of BiOI porous microspheres could be ascribed to its energy band structure, high Brunauer–Emmett–Teller (BET) surface area and high surface-to-volume ratios.
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