Preparation, Microstructure and Application of Sulfuric Acid Activated Fly Ash Photocatalyst

Abstract:

The microstructure and main components of fly ash determined its physical and chemical properties, and also related to the comprehensive utilization of fly ash. Based on the activated and modified by acid and alkali fusion method, the specific surface area, phase, surface microstructure and X-ray micro-analysis of the original and actived fly ash was evaluated by BET, XRD, SEM and EDS. At the same time, titanium dioxide photocatalyst supported on the modified fly ash was prepared and applied on the decolorization of dye wastewater. The results showed that sulfuric acid modification could obviously improve the ratio of surface area, microstructure and phase composition of the activated fly ash. The initial concentration of 20mg /L and pH = 6 of acidic red B simulated wastewater was chosen as the target solution to test the obtained photocatalyst. The decolorization rate was over 85% when the loading amount was 20% and decoloring time was 120 minutes.

• Periodical: Advanced Materials Research (Volumes 396-398)
• Pages: 1832-1836
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.396-398.1832
• Online since: November 2011
• Authors: Man De Qiu, Yong Qing Zhai, Guo Yi Bai, Feng Peng
• Keywords: Degradation, Fly Ash (FA), Microstructure, Modification, Photocatalyst

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