Study on photocatalytic degradation of methylene blue by supported phthalocyanine copper( II)
α-Octacyclopentyloxy phthalocyanine copper( Ⅱ)( α-CyOPcCu) is encapsulated into SBA-15 by impregnation wetness method,then the composites are characterized by N2 adsorption,Fourier transformation infrared spectra( FT-IR),scanning electron microscopy( SEM) techniques,and the catalytic properties on the degradation of methylene blue in aqueous solution has been examined. The effects of catalyst concentration,hydrogen peroxide concentration on the decolourization rate of methylene blue are researched. The results show that when the light intensity is 500 W,methylene blue concentration is 4 mg /L,α-CyOPcCu /SBA-15 concentration is 0. 6 g /L,hydrogen peroxide concentration is 0. 6 mmol /L,the degradation of methylene blue reaches 99. 60% within 90 min. The sequence of significant effect factors are: hydrogen peroxide concentration,catalyst concentration. The degradation reaction obeyed first-order dynamic equation,the rate constant is 0. 052 9 min-1.