Journal
ACTA METALLURGICA SINICA-ENGLISH LETTERS
Volume 27, Issue 1, Pages 124-130Publisher
CHINESE ACAD SCIENCES, INST METAL RESEARCH
DOI: 10.1007/s40195-013-0009-z
Keywords
Hydrothermal method; Photocatalysis; Microstructure and property
Categories
Funding
- Scientific Research Foundation for the Returned Overseas Chinese Scholars
- 521 Talents Training Plan in ZSTU
- National Natural Science Foundation of China [51373155, 51133006]
- Natural Science Foundation of Zhejiang Province [LY13B030009]
- Innovative Program for Graduate Students of Zhejiang Sci-Tech University [2013YSPY15]
- State Education Ministry [1001603-C]
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The N-doped bismuth tungstate (Bi2WO6) photocatalysts with high visible light activity were prepared by the hydrothermal method using urea as a nitrogen source. The as-prepared N-doped Bi2WO6 samples were characterized by X-ray diffraction, scanning electron microscopy, specific surface area, photocurrent analysis, and UV Vis diffuse reflectrance spectroscopy. The photocatalytic activity was evaluated by photocatalytic degradation of rhodamine B (RhB) solution under visible light irradiation. The photocatalytic mechanisms were analyzed by active species trapping experiments which revealed that the holes were the main active species of N-doped Bi2WO6 products in aqueous solution under visible light irradiation, rather than .OH and O-2(center dot-). With the assistance of H2O2, the photocatalytic activity for degradation of RhB could be further improved because H2O2 reacted with conduction band electrons to generate more hydroxyl radicals.
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