Preparation of WO3/ZnO composite photocatalyst and its photocatalytic performance
MetadataShow full item record
A series of WO3/ZnO composite photocatalysts with different WO3 concentrations were prepared by a precipitation-grinding method followed by calcination at different temperatures. The prepared samples were characterized by N2 physical adsorption, X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, UV-visible spectroscopy, and photoluminescence spectroscopy. The photocatalytic activity of the samples was evaluated by photocatalytic degradation of acid orange II under UV light (? = 365 nm) irradiation. The results showed that at the optimal calcination temperature of 600 °C, the WO3/ZnO composite photocatalyst with 2 wt% concentration of WO3 showed about doubled photocatalytic activity compared to pure ZnO. The increase in the photocatalytic activity could be attributed to the coupling of WO3, which suppressed the growth of ZnO particles, increase of the surface area and increased amount of surface OH groups of the sample. The presence of WO3 also restrained the recombination rate of e-/h+ pairs.
Showing items related by title, author, creator and subject.
In situ capture of active species and oxidation mechanism of RhB and MB dyes over sunlight-driven Ag/Ag 3PO 4 plasmonic nanocatalystTeng, W.; Li, Xin Yong; Zhao, Q.; Zhao, J.; Zhang, D. (2012)Sunlight-driven Ag/Ag 3PO 4 plasmonic nanocatalysts have been successfully prepared using an in situ ethylene glycol reduction method. The photocatalysts showed strong photocatalytic activity for decomposition of RhB and ...
Boyjoo, Yash; Ang, Ha-Ming; Pareek, Vishnu (2013)Design and analysis of photoreactors is significantly more challenging than conventional reactors due to participation of radiation in chemical reactions. This problem is further compounded in case of photocatalytic ...
Nitrogen-doped TiO2 microspheres with hierarchical micro/nanostructures and rich dual-phase junctions for enhanced photocatalytic activityWang, W.; Liu, Y.; Qu, J.; Chen, Y.; Shao, Zongping (2016)We successfully synthesized microspherical nitrogen-doped TiO2 with hierarchical nano/microstructures, rich anatase TiO2-TiO2(B) phase junctions and a reduced band gap by a facile solvothermal process, followed by a ...