Photocatalytic degradation of methylene blue on CaBi6O10/Bi2O3 composites under visible light

Photocatalytic degradation of methylene blue on CaBi6O10/Bi2O3 composites under visible light
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可见光下光催化降解CaBi6O10/Bi2O3复合材料上的亚甲基蓝

DOI:
10.1016/j.cej.2012.02.079
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发表时间:
2012-05
影响因子:
15.1
通讯作者:
Zhao, Leihong
Zhao, Leihong
中科院分区:
工程技术1区
文献类型:
--
作者:
Wang, Yongjiao;He, Yiming;Li, Tingting;Cai, Jun;Luo, Mengfei;Zhao, Leihong

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采用简单的沉积法制备了铋酸钙(CaBi 6 O 10/Bi 2 O3)复合材料,并将其作为可见光催化剂用于染料废水的降解,考察了其光催化活性.通过X射线衍射(XRD)、BET、拉曼光谱(拉曼)、扫描电子显微镜(SEM)、高分辨透射电子显微镜(HRTEM)和紫外-可见漫反射光谱(DRS)对催化剂进行了表征。以亚甲基蓝溶液为实验对象,在可见光(> 420 nm)照射下,考察了CaBiO复合材料的光催化活性。与单相的CaBi_6 O_(10)或Bi_2 O_3相比,CaBi_6 O_(10)/Bi_2 O_3二元半导体具有更好的光催化性能。基于能带位置计算和对苯二甲酸光致发光(PL)探针实验的结果,认为两种半导体中有效的电子-空穴分离是高活性的原因。
Calcium bismuthate (CaBi6O10/Bi2O3) composites synthesized using a simple deposition method were used as visible-light driven photocatalysts for dye degradation in polluted water and their activities were investigated. The photocatalysts were characterized via X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET) analysis, Raman spectroscopy (Raman), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), and UV–vis diffuse reflectance spectroscopy (DRS). The photocatalytic activity of the CaBiO composites was evaluated through the decomposition of methylene blue in an aqueous solution under visible light irradiation (>420nm). The CaBi6O10/Bi2O3binary semiconductors exhibit better photocatalytic properties compared with those of the single-phase CaBi6O10or Bi2O3. Based on the results of the energy band position calculation and the terephthalic acid photoluminescence (PL) probe experiment, the effective electron–hole separation in the two semiconductors is considered the cause of the high activity.
新型CaBi6O10光催化剂在可见光照射下降解亚甲基蓝
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