Facile Fabrication of Heterostructured Bi2O3-ZnO Photocatalyst and Its Enhanced Photocatalytic Activity

被引:285
作者
Balachandran, Subramanian [1 ]
Swaminathan, Meenakshisundram [1 ]
机构
[1] Annamalai Univ, Dept Chem, Annamalainagar 608002, Tamil Nadu, India
关键词
TIO2; ZNO; PHOTOLUMINESCENCE; DEGRADATION; NANOCRYSTALS; ORANGE; WATER;
D O I
10.1021/jp306874z
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The development of coupled semiconductor photocatalysts makes a significant advancement in catalytic functional materials. A new heterostructured Bi2O3-ZnO, synthesized by a simple hydrothermal-thermal decomposition method, exhibited higher photocatalytic activity for the degradation of Acid Black 1 (AB 1) under UV light than pure ZnO, Bi2O3, and commercial Degussa P25. X-ray powder diffraction analysis reveals that the as-synthesized product has the monoclinic lattice phase of Bi2O3 and the hexagonal wurtzite phase of ZnO. HR-SEM images show that Bi2O3-ZnO has an ordered mixture of nanofiber and nanochain structures. This heterostructured Bi2O3-ZnO has increased UV absorption when compared with ZnO. The enhanced photocatalytic activity of Bi2O3-ZnO is attributed to the low recombination rates of photoinduced electron-hole pairs, caused by the vectorial transfer of electrons and holes between ZnO and Bi2O3. Higher efficiency at neutral pH 7 and reusability in the degradation of AB 1 makes Bi2O3-ZnO, a promising candidate for the photocatalytic treatment of dye effluent.
引用
收藏
页码:26306 / 26312
页数:7
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