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Photo-catalytic Study of Malachite Green Dye Degradation Using Rice Straw Extracted Activated Carbon Supported ZnO Nano-particles

[ Vol. 10 , Issue. 6 ]

Author(s):

Radwa A. El-Salamony*, Abeer A. Emam, Nagwa A. Badawy and Sara F. El-Morsi   Pages 849 - 859 ( 11 )

Abstract:


Objective: ZnO nanoparticles were synthesized using wet impregnation method, and activated carbon from rice straw (RS) prepared through chemical route.

Methods: The nano-composites ZnO-AC series were prepared with different ZnO:AC ratio of 10, 20, 50, and 70% to optimize the zinc oxide nanoparticles used. The obtained composites were characterized by FE-SEM, XRD, SBET, and optical techniques then used for the photo-degradation of Malachite green dye (MG) under visible light.

Results: It was found that 10ZnO-AC exhibited excellent visible light photo-catalytic performance. The ·OH radicals’ formation is matching with photo-activity of the prepared composites. The photo-degradation efficiency of MG increased from 63% to 93%, when the 10ZnO-AC photocatalyst amount was increased from 0.5 to 6 g/L.

Conclusion: The GC-MS technique was used to analyze the intermediates formed; up to 15 kinds of chemicals were identified as the degradation products.

Keywords:

ZnO-AC, visible light, photo-degradation, malachite green dye, radical scavenger, GC-MS technique.

Affiliation:

Department of Process Development, Egyptian Petroleum Research Institute (EPRI), 11727, Nasr City, Cairo, Department of Chemistry, Faculty of Science, Al-Azhar University, Nasr City, Cairo, Department of Chemistry, Faculty of Science, Al-Azhar University, Nasr City, Cairo, Department of Chemistry, Faculty of Science, Al-Azhar University, Nasr City, Cairo

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