Sulphonated cobalt phthalocyanine-MCM-41: an active photocatalyst for degradation of 2,4-dichlorophenol.
The photocatalytic activity of sulphonated cobalt phthalocyanine immobilized onto MCM-41 was investigated for decomposition of 2,4-dichlorophenol (2,4-DCP) in aqueous solutions. Immobilization of anion sulpho-cobalt phthalocyanine to the walls of MCM-41 was performed by pre-anchorage of 3-(aminopropyl)-triethoxysilane (APTES) onto MCM-41 via post-synthesis method. X-ray diffraction, nitrogen physisorption, diffuse reflectance spectroscopy, energy-dispersive X-ray and FT-IR methods were used to characterize the product. Photocatalytic efficiency of the prepared catalyst for degradation of 2,4-DCP was tested under illumination of UV-A and visible light. The results obtained reveal that the photocatalyst is very active in degradation of 2,4-DCP. The photodegradation process is completed within 3h using a dose of 0.6g/L of the catalyst under UV irradiation. The reactions follow a pseudo-first-order kinetics and the observed rate constant values change with 2,4-DCP concentrations. The reproducibility of the catalyst was tested. The reaction intermediates were identified by gas chromatoghraphy-mass spectrometry (GC-MS) technique.
Zanjanchi
M A
MA
Department of Chemistry, Faculty of Science, University of Guilan, P.O. Box 1914, Namjoo St., Rasht 41335, Iran. zanjanchi@guilan.ac.ir
Ebrahimian
A
A
Arvand
M
M
D002384:Catalysis; D002733:Chlorophenols / Q000032:analysis / Q000737:chemistry*; D003035:Cobalt / Q000737:chemistry*; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods; D007211:Indoles / Q000737:chemistry*; D054833:Isoindoles; D007700:Kinetics; D010777:Photochemistry / Q000379:methods*; D011437:Propylamines; D012821:Silanes / Q000737:chemistry; D012822:Silicon Dioxide / Q000032:analysis / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D013997:Time Factors; D014466:Ultraviolet Rays; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*; D014961:X-Ray Diffraction
D002733:Chlorophenols; D007211:Indoles; D054833:Isoindoles; C509968:MCM-41; D011437:Propylamines; D012821:Silanes; D014874:Water Pollutants, Chemical; D003035:Cobalt; D012822:Silicon Dioxide; C477625:amino-propyl-triethoxysilane; C004762:2,4-dichlorophenol; C013647:phthalocyanine