Bacterial cellulose–SiO2@TiO2 organic–inorganic hybrid membranes with self-cleaning properties

Abstract : This work reports the preparation of bacterial cellulose (BC) membranes with self-cleaning properties. SiO2@TiO2 (anatase) spherical nanocomposites (around 50 nm in diameter) were prepared by sol–gel process and were successfully immobilized into the BC membrane, in wet and dry states, by post-grafting method, following two different methodologies: dip-coating and spin-coating. Characterization techniques included Raman scattering, energy-dispersive X-ray spectroscopies (EDS), thermogravimetric analyses (TGA), and scanning electron microscopy (SEM). The photocatalytic activity was higher in the BC membrane in the wet state, presenting a good self-cleaning performance (fast methyl violet 2B dye decomposition in 30 min). The functional BC membranes with self-cleaning properties also presented high resistance to washing, high chemical stability, and the original features (color and texture) were maintained.
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https://hal.umontpellier.fr/hal-02043634
Contributeur : Odile Hennaut <>
Soumis le : jeudi 21 février 2019 - 10:30:10
Dernière modification le : mardi 28 mai 2019 - 14:06:15

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  • HAL Id : hal-02043634, version 1

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A. Monteiro, R. Domeneguetti, M. Wong Chi Man, H. Barud, E. Teixeira-Neto, et al.. Bacterial cellulose–SiO2@TiO2 organic–inorganic hybrid membranes with self-cleaning properties. Journal of Sol-Gel Science and Technology, Springer Verlag, 2019, 89 (1), pp.2-11. ⟨hal-02043634⟩

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