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THABET, M. (2011). DEGRADATION OF AZO DYE C. I. DIRECT VIOLET- 4 BY VANADIUM MODIFIED MFI ZEOLTIE POWDER ADSORPTION AND PHOTOOXIDATION IN AQUEOUS SOLUTION. Al-Azhar Bulletin of Science, 22(Issue 1-A), 235-250. doi: 10.21608/absb.2011.7165
MOHAMED S. THABET. "DEGRADATION OF AZO DYE C. I. DIRECT VIOLET- 4 BY VANADIUM MODIFIED MFI ZEOLTIE POWDER ADSORPTION AND PHOTOOXIDATION IN AQUEOUS SOLUTION". Al-Azhar Bulletin of Science, 22, Issue 1-A, 2011, 235-250. doi: 10.21608/absb.2011.7165
THABET, M. (2011). 'DEGRADATION OF AZO DYE C. I. DIRECT VIOLET- 4 BY VANADIUM MODIFIED MFI ZEOLTIE POWDER ADSORPTION AND PHOTOOXIDATION IN AQUEOUS SOLUTION', Al-Azhar Bulletin of Science, 22(Issue 1-A), pp. 235-250. doi: 10.21608/absb.2011.7165
THABET, M. DEGRADATION OF AZO DYE C. I. DIRECT VIOLET- 4 BY VANADIUM MODIFIED MFI ZEOLTIE POWDER ADSORPTION AND PHOTOOXIDATION IN AQUEOUS SOLUTION. Al-Azhar Bulletin of Science, 2011; 22(Issue 1-A): 235-250. doi: 10.21608/absb.2011.7165

DEGRADATION OF AZO DYE C. I. DIRECT VIOLET- 4 BY VANADIUM MODIFIED MFI ZEOLTIE POWDER ADSORPTION AND PHOTOOXIDATION IN AQUEOUS SOLUTION

Article 16, Volume 22, Issue 1-A, June 2011, Page 235-250  XML PDF (337.17 K)
Document Type: Original Article
DOI: 10.21608/absb.2011.7165
Author
MOHAMED S. THABET*
Department of Chemistry, Faculty of Science, Al-Azhar University, Cairo, Egypt.
Abstract
Vanadium modified zeolite was synthesized using the chemical liquid deposition (CLD) and wet exchange methods refer by V/ZCLD, V/Zwet . The obtained materials were calcined at 550°C and characterized using XRD, FTIR, and nitrogen adsorption. The characterized materials were applied for the photo-decolorization of direct violet-4 (DVO-4) as a member of azo dye family, in aqueous medium using hydrogen peroxide and/or UV irradiation (254 nm). The effects of time and catalyst concentration on the decolorization of DVO-4 dye were investigated. The decolorization of (DVO-4) dye and the decreasing in concentration of the dye have been followed using UV–vis spectrophotometry. Results showed that the addition of V/ZCLD, V/Zwet and H2O2 to the dye solution enhanced the rate of degradation. The decolorization followed the pseudo first order kinetics model and a significant mineralization of (DVO-4) was observed.
Keywords
photocatalysis; Direct Violet; azo dye; Decolorization; Vanadium; MFI zeolite
Main Subjects
Chemistry
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