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Chemosphere. 2019 Oct;233:975-982. doi: 10.1016/j.chemosphere.2019.06.011. Epub 2019 Jun 3.

The efficient, fast and facile decolorization of organic dyes homogeneously catalyzed by iron octacarboxylic phthalocyanine.

Author information

1
School of Chemistry and Chemical Engineering, Key Laboratory of Micro-Nano Materials for Energy Storage and Conversion of Henan Province, Xuchang University, Henan, 461000, PR China. Electronic address: lidapengabc@126.com.
2
Institute of Surface Micro and Nano Materials, Key Laboratory of Micro-Nano Materials for Energy Storage and Conversion of Henan Province, Henan Joint International Research Laboratory of Nanomaterials for Energy and Catalysis, Xuchang University, Henan, 461000, PR China. Electronic address: 365063148@qq.com.
3
School of Chemistry and Chemical Engineering, Key Laboratory of Micro-Nano Materials for Energy Storage and Conversion of Henan Province, Xuchang University, Henan, 461000, PR China; School of Civil Engineering and Communication, North China University of Water Resources and Electric Power, Henan, 450011, PR China.
4
School of Chemistry, The University of Edinburgh, Scotland, eh9 3fj, United Kingdom.
5
School of Chemistry and Chemical Engineering, Key Laboratory of Micro-Nano Materials for Energy Storage and Conversion of Henan Province, Xuchang University, Henan, 461000, PR China.
6
Institute of Surface Micro and Nano Materials, Key Laboratory of Micro-Nano Materials for Energy Storage and Conversion of Henan Province, Henan Joint International Research Laboratory of Nanomaterials for Energy and Catalysis, Xuchang University, Henan, 461000, PR China.
7
School of Civil Engineering and Communication, North China University of Water Resources and Electric Power, Henan, 450011, PR China.

Abstract

To remove the harmful dye contaminants via an efficient, facile and low energy consumption route is a grave challenge in current chemical industry. Though the great progresses of TiO2 photocatalysis and enzymatic degradation have been witnessed, the strategy for satisfying the above requirements is still worth exploring. Herein, we develop a biomimetic catalysis strategy for the fast decolorization of organic dyes catalyzed by iron octacarboxylic phthalocyanine (FeOCPc) complexes assisted with tert-butyl hydroperoxide (BuOOH). Methyl orange (MO) and methylene blue (MB) were used as the model pollutants and experimental results show that the decolorization degree of 25 mg/L MO could achieve 100% within 20 min and 80% for 25 mg/L MB within 30 min. The molar ratio for FeOCPc/MO and FeOCPc/MB is 0.146 and 0.142, respectively. Interestingly, other than the high-valent iron-oxygen active species, tert-butyl peroxyl radicals and hydroxyl radicals were detected as the active species generated during the catalytic oxidation by the electron paramagnetic resonance (EPR) measurement. This work not only provides a distinctive biomimetic catalysis system of FeOCPc-BuOOH for the fast bleaching of dye pollutants, but also proposes the new insight on a mechanism based on the cooperation catalysis of iron-oxygen active species, tert-butyl peroxyl radicals and hydroxyl radicals.

KEYWORDS:

Metal phthalocyanine; Methyl orange; Methylene blue; tert-butyl hydroperoxide

[Indexed for MEDLINE]

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