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  • Enhanced decomposition of dimethyl phthalate via molecular oxygen activated by Fe@Fe2O3/AC under microwave irradiation.

Enhanced decomposition of dimethyl phthalate via molecular oxygen activated by Fe@Fe2O3/AC under microwave irradiation.

Journal of hazardous materials (2012-08-14)
Yiling Chen, Zhihui Ai, Lizhi Zhang
ABSTRACT

In this study, we demonstrate that the decomposition of dimethyl phthalate under microwave irradiation could be greatly enhanced over Fe@Fe(2)O(3) nanowires supported on activated carbon (Fe@Fe(2)O(3)/AC). The great enhanced decomposition of dimethyl phthalate could be attributed to a unique microwave induced molecular oxygen activation process. Upon microwave irradiation, electrons could be transferred from activated carbon to zero-valent iron, and then react with molecular oxygen to form O(2)(-) and OH radicals for the decomposition of dimethyl phthalate. The deactivation and the regeneration of Fe@Fe(2)O(3)/AC catalyst were systematically studied. We also found that microwave heating could accelerate the electron transferring from AC to Fe@Fe(2)O(3) to generate more reactive oxygen species for the decomposition of DMP than conventional oil bath heating. This novel molecular oxygen activation approach may find applications for wastewater treatment and drinking water purification.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Dimethyl phthalate, ≥99%
Supelco
Dimethyl phthalate, PESTANAL®, analytical standard
Supelco
Density Standard 1191 kg/m3, H&D Fitzgerald Ltd. Quality
Sigma-Aldrich
Dimethyl phthalate, ≥99%