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Cellulose

, Volume 19, Issue 4, pp 1351–1359 | Cite as

Effect of a spacer on phthalocyanine functionalized cellulose nanofiber mats for decolorizing reactive dye wastewater

  • Shi-Liang Chen
  • Xiao-Jun Huang
  • Zhi-Kang Xu
Original Paper

Abstract

We report a novel cobalt tetraaminophthalocyanine (CoPc) functionalized nanomaterial by spacer-arm immobilization of CoPc onto cellulose nanofiber mats. The spacer-arm was attached through the reaction of tetraethylenepentamine with oxidized cellulose nanofiber mats. CoPc was then covalently immobilized onto the spacer-arm using glutaraldehyde. The functionalization processes on the nanofiber mats were monitored by attenuated total reflection Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. This CoPc functionalized nanomaterial (CoPc-spacer-NM) was used for decoloration of reactive dye wastewater. Incorporation of the spacer-arm resulted in enhanced decoloration with respect to directly immobilized CoPc onto the cellulose nanofiber mats (CoPc-NM). Compared with CoPc-NM, CoPc-spacer-NM shows much higher adsorption capacity when conducted under acidic conditions, which enhances the catalytic oxidation rate of reactive dye when H2O2 was used as an oxidant. Reactive dye wastewater can also be efficiently decolorized by the CoPc-spacer-NM/H2O2 system under basic conditions, despite a relatively weak adsorption capacity. Electron paramagnetic resonance results suggested that the catalytic oxidation process involves the formation and reaction of hydroxyl radicals. Gas chromatography–mass spectrometry showed the main products of the catalytic oxidation of reactive red X-3B were biodegradable aliphatic acids, such as oxalic acid, malonic acid and maleic acid.

Keywords

Cellulose nanofiber mats Phthalocyanine Immobilization Spacer-arm Nanomaterial Decoloration 

Abbreviations

CoPc-NM

CoPc functionalized nanofiber mats

CoPc-spacer-NM

CoPc functionalized, spacer-arm attached cellulose nanofiber mats

OC-NM

Oxidized cellulose nanofiber mats

TEPA-NM

Tetraethylenepentamine attached nanofiber mats

GA-NM

Glutaraldehyde activated nanofiber mats

Notes

Acknowledgments

The authors are grateful to the financial support from the National Natural Science Foundation of China for Distinguished Young Scholars (Grant no. 50625309).

Supplementary material

10570_2012_9701_MOESM1_ESM.doc (1.5 mb)
Supplementary material 1 (DOC 1564 kb)

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Copyright information

© Springer Science+Business Media B.V. 2012

Authors and Affiliations

  1. 1.MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and EngineeringZhejiang UniversityHangzhouChina

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