TiO2–MCM-41 for the photocatalytic abatement of NOx in gas phase

• Published in: Applied catalysis. B, Environmental Vol. 95; no. 1-2; pp. 130 - 136
• Main Authors: Signoretto, M., Ghedini, E., Trevisan, V., Bianchi, C.L., Ongaro, M., Cruciani, G.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 12-03-2010; Elsevier
• Subjects: Catalysis; Chemistry; Colloidal state and disperse state; Exact sciences and technology; General and physical chemistry; Mesoporous silica; Nanotitania; NOx oxidation; Photocatalysis; Photochemistry; Physical chemistry of induced reactions (with radiations, particles and ultrasonics); Porous materials; Surface physical chemistry; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; NOx oxidation; Nanotitania; Mesoporous silica; Photocatalysis; Binary compound; Support; X ray; Porous material; Physisorption; Silica; Characterization; Degradation; Titanium; Photoelectron spectrometry; Oxidation; Chemical properties; Nitrogen oxide; Transition element compounds; Transition metal; X ray diffraction; Physical properties; Mesoporosity; Heterogeneous catalysis; Impregnation; Transmission electron microscopy; Gas phase; Titanium oxide; Catalyst; Environmental protection
• ISSN: 0926-3373; 1873-3883
• DOI: 10.1016/j.apcatb.2009.12.019

Nanotitania supported on mesoporous silica systems were synthesized by a reliable procedure based on an incipient wetness impregnation post-synthetic approach. Characterization by X-ray diffraction, N2 physisorption, TEM, X-ray photoelectron spectroscopy, ICP has been carried out in order to investigate the chemical–physical properties of the catalysts with particular attention to the chemical nature of the titanium species. The photocatalytic activity of the samples was evaluated for the degradation of NOx in the gas phase. The influence of both the textural properties and the nature of titanium species on the photocatalytic activity is discussed.