1. Preparation and Photocatalysis Properties of Bacterial Cellulose/TiO 2 Composite Membrane Doped with Rare Earth Elements.
- Author
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Zhang, Xiuju, Chen, Wenbin, Lin, Zhidan, Yao, Jia, and Tan, Shaozao
- Subjects
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PHOTOCATALYSIS , *TITANIUM dioxide , *RARE earth metals , *NANOSTRUCTURED materials , *PARTICLES , *NANOCOMPOSITE materials , *SCANNING electron microscopy , *X-ray spectroscopy - Abstract
Bacterial cellulose (BC) was chosen as a support for nanometer titanium dioxide (TiO2) particles due to its superfine network structure. The composite membrane of TiO2/BC doped with rare earth elements was prepared by a sol-gel method using tetraisopropyl titanate as starting material. Photocatalysis properties of this composite membrane were estimated by using methyl orange as a degradation agent. X-ray fluorescence (XRF) spectra showed that rare earth ions were incorporated into TiO2/BC membrane. X-ray diffraction (XRD) spectra showed that the resulting titanium dioxide was anatase type, which didn't change after doping. Compared with a pure TiO2/BC membrane, photocatalysis efficiency was significantly enhanced for the doped one. The degradation rate of methyl orange solution for a composite membrane doped with Ce4+ was up to 100%, while with La3+ it was was up to 79.7%. The optimal dosage of Ce4+ was 2 mmol/L, while the most suitable concentration of La3+ was 5 mmol/L within the experimental range. [ABSTRACT FROM AUTHOR]
- Published
- 2011
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