Title: Preparation of poly(3-hydroxybutyrateco-3-hydroxyvalerate) supported cobalt phthalocyanine thin membranes and its catalytic degradation of methylene blue

Authors: Minhong Xu; Haifeng Chen; Guoxiang Pan; Yuhua Guo; Tao Wu

Addresses: Department of Materials Engineering, Huzhou University, Huzhou, 313000, China ' Department of Materials Engineering, Huzhou University, Huzhou, 313000, China ' Department of Materials Engineering, Huzhou University, Huzhou, 313000, China ' Department of Materials Engineering, Huzhou University, Huzhou, 313000, China ' Department of Materials Engineering, Huzhou University, Huzhou, 313000, China

Abstract: The supported catalyst membranes (CoPc/PHBV) were prepared by solution casting method with tetracarboxyphthalocynine cobalt (CoPc) and poly(3-hydroxybutyrateco-3-hydroxyvalerate) (PHBV). The membranes were characterised by scanning electron microscope, X-ray diffractometer and fourier transform infrared spectroscopy. The results indicate that CoPc and PHBV may be combined by physical, and the crystal structure of PHBV which loaded CoPc is not changed. In addition, the catalytic performances of CoPc/PHBV were evaluated by degradation of methylene blue (MB). The results reveal that CoPc/PHBV and H₂O₂ have significant synergistic effect on catalytic degradation of MB, and degradation efficiency is 73% after 7 h. Hydroxyl radicals play a key role in catalytic degradation of MB based on the study of reaction mechanism. The dynamics about catalytic oxidation of MB were also explored. The results show that catalytic degradation process fits well with first-order kinetic equation.

Keywords: cobalt phthalocyanine; CoPc; catalytic degradation; methylene blue; poly(3-hydroxybutyrateco-3-hydroxyvalerate); PHBV; synergistic effect; the first-order kinetic model; reaction mechanism; hydroxyl radical.

DOI: 10.1504/IJNM.2019.097238

International Journal of Nanomanufacturing, 2019 Vol.15 No.1/2, pp.46 - 57

Received: 31 May 2017
Accepted: 26 Oct 2017
Published online: 07 Jan 2019 *

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