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Electrospun ZnO/Bi2O3 Nanofibers with Enhanced Photocatalytic Activity
被引:20
作者:
Yang, Yingying
[1
]
Xu, Lingling
[1
]
Su, Chunyan
[2
]
Che, Jixin
[3
]
Sun, Wenjun
[1
]
Gao, Hong
[1
]
机构:
[1] Harbin Normal Univ, Sch Phys & Elect Engn, Key Lab Photon & Elect Bandgap Mat, Minist Educ, Harbin 150025, Peoples R China
[2] Harbin Univ, Dept Phys, Harbin 150086, Peoples R China
[3] Aviat Univ Air Force, Changchun 130022, Peoples R China
基金:
美国国家科学基金会;
关键词:
WATER;
NANOPARTICLES;
D O I:
10.1155/2014/130539
中图分类号:
TB3 [工程材料学];
学科分类号:
0805 ;
080502 ;
摘要:
ZnO/Bi2O3 nanofibers were synthesized by a simple electrospinning method and both the UV and visible light responsive photocatalytic properties were studied by the decolorization of RhB dye. Thermogravimetric analysis/differential thermal analysis (TGA-DTA), X-ray diffraction (XRD), scanning electron microscope (SEM), and UV-vis diffuse reflectance spectra (DRS) were employed to study the structure, morphology, and optical properties of the ZnO/Bi2O3 nanofibers, respectively. The relationship between the ZnO/Bi2O3 ratio and photocatalytic activity was also studied, and the composite with a molar ratio of 23:1 demonstrated the best activity under both excitations. The photocatalytic mechanisms for the composite fibers can be described as the direct photocatalysis under UV excitation and photosensitation for visible light irradiation. The enhanced photocatalytic activities can be ascribed to the effective electron-hole pairs separation that leads to the promoted photocatalytic efficiency.
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页数:7
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