Visible-light photooxidation of trichloroethylene by Cr–Al-MCM-41

• Published in: Journal of catalysis Vol. 230; no. 1; pp. 158 - 165
• Main Authors: Rodrigues, Shalini, Ranjit, Koodali T., Uma, S., Martyanov, Igor N., Klabunde, K.J.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier Inc 15.02.2005; Elsevier
• Subjects: Catalysis; Chemistry; Colloidal state and disperse state; Cr–Al-MCM-41; Exact sciences and technology; General and physical chemistry; Mesoporous; Photocatalysis; Photochemistry; Physical chemistry of induced reactions (with radiations, particles and ultrasonics); Porous materials; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; Trichloroethylene; UV irradiation; Visible light; Trichloroethylene; Visible light; UV irradiation; Mesoporous; Cr–Al-MCM-41; Photocatalysis; Aluminium; Porous material; Mesoporosity; Ultraviolet irradiation; Chlorocarbon; Visible radiation; Chromium; Cr-Al-MCM-41; Photooxidation
• DOI: 10.1016/j.jcat.2004.11.044
• ISSN: 0021-9517

In the present study, the photooxidation of gaseous trichloroethylene (TCE) was performed on Cr–Al-MCM-41 (predominantly a SiO 2 framework) under visible light and UV light. This mesoporous Cr-containing MCM-41 material is a promising photocatalyst and exhibits excellent photoactivity. Moreover, the products of photooxidation under visible light are similar to those under UV-light illumination. The photocatalysis process occurs on isolated Cr 6+ ions supported on a predominantly SiO 2 framework. A possible mechanism leading to the photooxidation of TCE together with the detection of intermediates by gas chromatography-mass spectrometry is reported here.