Novel CaBi6O10 photocatalyst for methylene blue degradation under visible light irradiation

Novel CaBi6O10 photocatalyst for methylene blue degradation under visible light irradiation
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新型CaBi6O10光催化剂在可见光照射下降解亚甲基蓝

DOI:
10.1016/j.catcom.2011.12.011
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发表时间:
2012-02
影响因子:
3.7
通讯作者:
Zhao, Leihong
Zhao, Leihong
中科院分区:
化学3区
文献类型:
--
作者:
Wang, Yongjiao;He, Yiming;Li, Tingting;Cai, Jun;Luo, Mengfei;Zhao, Leihong

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采用简单的水热-煅烧法制备了花状光催化剂CaBi 6 O 10,并采用XRD、拉曼、SEM、BET、DRS和密度泛函理论(DFT)等技术对其进行了表征。结果表明,CaBi_6 O_(10)对537 nm以下的可见光有响应(Eg=2.31eV)。此外,CaBi_6 O_(10)具有比Bi_2 O_3更宽的导带,有利于光生电子在CaBi_6 O_(10)中的迁移,有利于光催化反应。CaBi_6 O_(10)良好的光吸收和特殊的电子结构被认为是其光催化降解亚甲基蓝活性高的原因。
A novel photocatalyst CaBi6O10with flower-like morphology was prepared by a simple impregnation–calcination method and investigated by techniques such as XRD, Raman, SEM, BET, DRS, and density function theory (DFT). Results reveal that CaBi6O10is responsive to visible light below 537nm (Eg=2.31eV). In addition, CaBi6O10presents broader conduction band than Bi2O3, which favors the mobility of photo-generated electrons in CaBi6O10and contributes positively to the photocatalytic reaction. The good photoabsorption and the special electron structure were considered as the origin of the high activity of CaBi6O10in methylene blue photodegradation.
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