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Issue 107, 2015
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Two step and one step preparation of porous nanocomposite cellulose membranes doped with TiO2

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Abstract

Cellulose–TiO2 nanocomposites have been successfully prepared by non-solvent induced phase separation from cellulose acetate solutions in classical organic solvents followed by deacetylation (“regeneration”). The cellulose deacetylation has been performed either sequentially, i.e. after the completion of the phase separation process, or simultaneously, i.e. during the phase separation process. Commercially available titania nanoparticles from gas phase synthesis processes have been used and processed as a dispersion in the respective polymer solutions. The resulting nanocomposites have been characterized by means of scanning electron microscopy (SEM) and Fourier transform infrared (FT-IR) spectroscopy. Special attention has been given to the complex relation between the conditions of the deacetylation process, the structure of the resulting TiO2 doped cellulose membranes and their corresponding catalytic activities. Two catalytic activity tests, based on the photocatalytic degradation of model organic dyes under UV irradiation, have been used for the functional characterization of the TiO2 doped nanocomposites. The performed experiments demonstrated the successful photocatalyst immobilization in porous cellulose acetate together with good catalytic activity of this nanocomposite intermediate. By simply varying the conditions of the cellulose deacetylation, nanocomposite cellulose membranes with different structures and properties have been obtained. However after the regeneration of cellulose a partial decrease of the catalytic activity was observed.

Graphical abstract: Two step and one step preparation of porous nanocomposite cellulose membranes doped with TiO2

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Publication details

The article was received on 13 Aug 2015, accepted on 09 Oct 2015 and first published on 09 Oct 2015


Article type: Paper
DOI: 10.1039/C5RA16337D
Citation: RSC Adv., 2015,5, 88070-88078
  • Open access: Creative Commons BY license
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    Two step and one step preparation of porous nanocomposite cellulose membranes doped with TiO2

    A. Wittmar, D. Vorat and M. Ulbricht, RSC Adv., 2015, 5, 88070
    DOI: 10.1039/C5RA16337D

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