Preparation of ordered mesoporous Ag/WO3 and its highly efficient degradation of acetaldehyde under visible-light irradiation

• Published in: Journal of hazardous materials Vol. 178; no. 1-3; pp. 427 - 433
• Main Authors: Sun, Songmei, Wang, Wenzhong, Zeng, Shaozhong, Shang, Meng, Zhang, Ling
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier 15.06.2010
• Subjects: Acetaldehyde; Acetaldehyde - chemistry; Acetaldehyde - radiation effects; Air Pollutants, Occupational - chemistry; Air Pollutants, Occupational - radiation effects; Applied sciences; Atmospheric pollution; Carbon Dioxide - chemistry; Carbon Dioxide - metabolism; Catalysis; Catalytic reactions; Chemical engineering; Chemistry; Exact sciences and technology; General and physical chemistry; Irradiation; Light; Microscopy, Electron, Transmission; Nanoparticles; Oxidation-Reduction; Oxides - chemistry; Oxides - radiation effects; Photocatalysis; Photochemistry; Pollutants; Pollution; Porosity; Reactors; Silver; Silver Compounds - chemistry; Silver Compounds - radiation effects; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; Titanium - chemistry; Titanium dioxide; Tungsten - chemistry; Tungsten - radiation effects; Tungsten oxides; Ultrasound; X-Ray Diffraction; Pollutant behavior; Photocatalysis; Nitrogen; Photocatalyst; Mesoporous structure; Preparation; Visible radiation; Silver loaded; Air pollution; Titanium oxide; Ultrasound; Catalyst; Tungsten trioxide; Photochemical degradation
• ISSN: 0304-3894; 1873-3336; 1873-3336
• DOI: 10.1016/j.jhazmat.2010.01.098

A highly active photocatalyst, silver loaded mesoporous WO(3), was successfully synthesized by an ultrasound assisted insertion method. The photodegradation of a common air pollutant acetaldehyde was adopted to evaluate the photocatalytic performance of the as-prepared sample under visible-light irradiation. The photocatalytic activity was about three and six times higher than that of pure mesoporous WO(3) and nitrogen-doped TiO(2), respectively. The photocatalytic mechanism was investigated to understand the much enhanced photocatalytic activity, which was mainly attributed to the largely improved electron-hole separation in the Ag-WO(3) heterojunction.