Catalytic Properties of Manganese Complex of Cyclic Polyamine Encapsulated in Ethyl Cellulose Microcapsules†

doi:10.7503/cjcu20140250

Abstract

Abstract:

Manganese complex of cyclic polyamine(MnAcL) was encapsulated within ethyl cellulose(EC) microcapsules via emulsion solvent evaporation technique. The morphology of MnAcL-EC microcapsule was characterized. The results of UV-Vis confirmed the structural integrity of MnAcL in EC microcapsules. The catalytic property of the as-prepared MnAcL-EC microcapsules was evaluated by the oxidation of C.I. Reactive blue 49 with H₂O₂. It was found that both the particle size and the pores on the surface of the spheres increased after the reaction. However, the amount of MnAcL in EC microcapsules was almost not changed, as measured by the elemental analysis. It was suggested that the oxidation of C.I. Reactive blue 49 was catalyzed successfully by the encapsulated MnAcL inside the microcapsules. What’s more, the as-prepared MnAcL-EC microcapsules could be reused for at least 4 times. These results demonstrated that the MnAcL-EC microcapsule prepared in this paper could be applied as a high efficient catalyst.

Key words: Manganese complex of cyclic polyamine, Immobilization, Microcapsule, Catalyst, Oxidation reaction(Ed.: V, Z)

CLC Number:

O643.3

TrendMD:

SONG Min, ZHANG Linping, ZHONG Yi, XU Hong, MAO Zhiping. Catalytic Properties of Manganese Complex of Cyclic Polyamine Encapsulated in Ethyl Cellulose Microcapsules^†[J]. Chem. J. Chinese Universities, 2014, 35(9): 1941.

Figures/Tables 9

Fig.1 UV-Vis spectra of MnAcL(a) and MnAcL-EC(b)

Fig.2 Optical microscopy images of emulsion droplets before evaporation(A1, A2) and microcapsules after curing(B1, B2) with different magnifications

Fig.3 TEM images of MnAcL-EC microcapsules with different magnifications

Fig.4 Oxidation of C.I. Reactive Blue 49 catalyzed by MnAcL and MnAcL-EC microcapsules C.I. Reactive Blue 49的氧化降解速率和程度均提高很大, 达到了约90%的氧化降解率,

Fig.5 SEM images of MnAcL-EC microcapsules before(A1—A3) and after the oxidation reaction(B1—B3)

Fig.6 Size distribution of MnAcL-EC microcapsules before(a) and after(b) the oxidation reaction

Fig.7 SEM cross-section view of MnAcL-EC microcapsules

Fig.8 Sustained-release of MnAcL-EC microcapsules

Fig.9 Recycling tests of MnAcL and MnAcL-EC microcapsules

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