Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 113, Issue 47, Pages 20228-20233Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp9067729
Keywords
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Funding
- National Natural Science Foundation of China [50672117, 50732004]
- National Basic Research Program of China (973 Program) [2007CB613302]
- Nanotechnology Programs of Science and Technology Commission of Shanghai [0852 nm00500]
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Photocatalytic active spindle-like BiVO4 modified by polyaniline (PANI) was synthesized via a sonochemical approach for the first time. Scanning electron microscope (SEM) and transmission electron microscopy (TEM) images revealed that the photocatalysts are composed of well-crystallized small nanoparticles. The efficient photocatalytic activity in the degradation of a widely used dye, tetraethylated rhodamine (RhB), and phenol under visible-light irradiation (lambda > 420 nm) was realized by the spindle-like PANI/BiVO4. Besides decoloring, reduction of the chemical oxygen demand (COD) concentration was also observed in the degradation of RhB, further demonstrating the photocatalytic performance of PANI/BiVO4. Additionally, the notable enhanced photocatalytic performance for phenol oxidation was also realized with the assistance of a little amount of H2O2. The enhanced photocatalytic activity could be attributed to the synergic effect between PANI and BiVO4, which promoted the migration efficiency of photogenerated electron-hole. According to experimental results, the possible photocatalytic mechanisms of the PANI/BiVO4 photocatalyst were proposed in order to guide the further improvement of its photocatalytic performance.
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