Oxidative Decolorization of Azo Dyes with Copper Phthalocyanine Supported Mg-Al Hydrotalcites

Abstract:

Oxidative decolorization of azo dyes with a heterogeneous catalyst copper phthalocyanine supported Mg-Al hydrotalcites was studied and the influence factors such as initial pH value, temperature, H₂O₂ and CuPc-LDHs/H₂O₂ system were discussed. The results indicated that acidic solution and high temperature were conducive to oxidative decoloration of methyl orange. CuPc-LDHs/H₂O₂ system showed excellent oxidative decoloration capacity to remove azo dyes. The effects of oxidative decolorization of azo dyes were related to the molecular structure and weight of azo dyes. Oxidative decoloration effects followed the order as congo red > amido black > methyl blue> methyl orange> methylene blue.

• Periodical: Key Engineering Materials (Volume 703)
• Pages: 306-310
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.703.306
• Online since: August 2016
• Authors: Min Hong Xu*, Jian Li Ma, Meng Xia Qian, Hui Na Qin
• Keywords: AZO Dye, Copper Phthalocyanine, Mg-Al Hydrotalcites, Oxidative Decolorization

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