期刊
APPLIED SURFACE SCIENCE
卷 289, 期 -, 页码 224-229出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2013.10.139
关键词
Bi-2 O-3/H-ZSM-5; Composites; Photodegradation; Ion-exchange; Synergistic effect
类别
资金
- National Natural Science Foundation of China [51262028]
- Scientific Fundamental Research Funds for the Gansu Universities
- Gansu Provincial Natural Science Foundation of China [1107RJZA194]
- Opening Project of Key Laboratory of Green Catalysis of Sichuan Institutes of High Education [LZJ1206]
- Young Teacher Research Foundation of Northwest Normal University [NWNU-LKQN-11-17]
Bi2O3/H-ZSM-5 composite photocatalysts were synthesized via a facile ion-exchange method. X-ray diffraction (XRD), scanning electron microscopy (SEM) and UV-vis diffuse reflectance spectroscopy (DRS) were employed to study the phase structure, morphology and optical properties of the synthesized samples. The photocatalytic activities of the samples were evaluated by photocatalytic degradation of rhodamine B (RhB) under UV light irradiation. The results showed that, at the optimal loading with 18 wt.% Bi2O3, the Bi2O3/H-ZSM-5 composite photocatalyst acquires the highest photocatalytic activity. Moreover, the kinetics of photocatalytic degradation reaction could be expressed by the first-order reaction kinetic model. The increased photocatalytic performance could be attributed to the synergistic effect between Bi2O3 and H-ZSM-5. The special structure of H-ZSM-5 increases the number of the active sites to adsorb more dye and photodegrade it on Bi2O3 photocatalyst. (C) 2013 Elsevier B.V. All rights reserved.
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