Highly Active TiO2/Polyelectrolytes Hybrid Multilayered Hollow Nanofibrous Photocatalyst Prepared from Electrouspun Fibers Using Electrostatic Layer-by-Layer Technique |
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| Authors: | Chao Pan Li Dong Li-Qin Ge Jing Wang Zhong-Ze Gu |
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| Institution: | 1. College of Science , Dalian Fisheries University , Dalian, China;2. College of Science , Dalian Nationalities University , Dalian, China;3. State Key Laboratory of Bioelectronics , Southeast University , Nanjing, China |
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| Abstract: | Compared to conventional film photocatalysts, fiber photocatalyst has a greater surface-to-volume ratio and a 3-D open structure that allows its surface active sites to be accessible for reactants more easily and effectively. However, TiO 2 powder (Degussa P25), by itself, cannot be prepared in the form of fibers, but with the help of a polymer nanofiber, TiO 2 particles can be immobilized in a fibrous network of polyelectrolyte. Here, hybrid multilayered hollow nanofibers (HMHNFs) composed of TiO 2 /polyelectrolyte (PE) have been prepared by a combination of a electrospinning method and layer-by-layer (LBL) technology. The results show that both the average diameter and the wall thickness of the HMHNFs can be well controlled by the template, as well as the number of coating layers. The dried morphology of the obtained HMHNFs is dependent on the inner deposited numbers of the polyelectrolyte layers. When compared with other nanostructured TiO 2 materials, such as commercial TiO 2 nanoparticles (P25, Degussa) and TiO 2 films, the hollow TiO 2 /PE hybrid nanofibers exhibited higher photocatalytic activities. |
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| Keywords: | hollow multilayered hybrid nanofibers TiO2 polyelectrolyte electrospinning layer-by-layer self-assembly |
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