Quantum-sized BiVO4 modified TiO2 microflower composite heterostructures: Efficient production of hydroxyl radicals towards visible light-driven degradation of gaseous toluene
MetadataShow full item record
© The Royal Society of Chemistry 2015. In an effort to develop visible-light-driven heterostructured photocatalysts with high activity, a novel quantum-sized tubelike BiVO4 sensitized TiO2 microflower catalytic system was successfully fabricated by using a facile hydrothermal and ultrasonic adhering approach. The structural and optical properties of the as-prepared samples were comparatively characterized. The staggered band structure of quantum-sized BiVO4 decorated TiO2 not only extended the photo-response range but also promoted photoexcited charges transfer and separation. Photocatalytic activities of the as-prepared samples were examined by the degradation of toluene under visible light irradiation (? > 400 nm). Compared to the individual TiO2 microflower, BiVO4 quantum tube, BiVO4 nanoparticle and nano-BiVO4/TiO2, the quantum-BiVO4/TiO2 (Q-BiVO4/TiO2) composite exhibited higher photo activities. Electron spin resonance (ESR) examinations confirmed the generation of the photo-induced reactive oxygen species (OH and O2 -) which were involved in the photocatalytic process of Q-BiVO4/TiO2 composites. Furthermore, the enhanced photocatalytic activity of the Q-BiVO4/TiO2 composite mainly originated from the high separation efficiency of photo-induced electron-hole pairs and the efficient production of hydroxyl radicals. A detailed mechanism accounting for the superior photocatalytic activity was proposed in terms of the energy band structures of the components.
Showing items related by title, author, creator and subject.
Construction of p-n heterojunction ß-Bi<inf>2</inf>O<inf>3</inf>/BiVO<inf>4</inf> nanocomposite with improved photoinduced charge transfer property and enhanced activity in degradation of ortho-dichlorobenzeneSun, J.; Li, X.; Zhao, Q.; Tade, Moses; Liu, Shaomin (2017)© 2017 Elsevier B.V. To achieve efficient conversion of solar to chemical energy in photocatalysis, development of visible-light-induced catalysts with high charge carrier mobility and superior activity is essential. In ...
Novel V2O5/BiVO4/TiO2 nanocomposites with high visible-light-induced photocatalytic activity for the degradation of tolueneSun, J.; Li, Xin Yong; Zhao, Q.; Ke, J.; Zhang, D. (2014)In an effort to develop nanostructured photocatalysts to achieve high performance in heterogeneous photocatalysis, a novel composite V 2O5/BiVO4/TiO2 photocatalyst was successfully synthesized by using a sequentially ...
Fast fabrication of Co3O4 and CuO/BiVO4 composite photocatalysts with high crystallinity and enhanced photocatalytic activity via ultrasound irradiationYu, C.; Yang, K.; Yu, J.; Cao, F.; Li, Xin Yong; Zhou, X. (2011)A facile and efficient approach for the fabrication of Co3O4 and CuO/BiVO4 composite photocatalysts was developed by intense ultrasound irradiation at room temperature. The as-synthesized samples were characterized by ...