Hydrophilic TiO2 porous spheres anchored on hydrophobic polypropylene membrane for wettability induced high photodegrading activities

Fang Niu; Le-Sheng Zhang; Chao-Qiu Chen; Wei Li; Lin Li; Wei-Guo Song; Lei Jiang

doi:10.1039/C0NR00182A

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Hydrophilic TiO₂ porous spheres anchored on hydrophobic polypropylene membrane for wettability induced high photodegrading activities†

Fang Niu,‡^a Le-Sheng Zhang,‡^a Chao-Qiu Chen,‡^a Wei Li,‡^a Lin Li,^a Wei-Guo Song*^a and Lei Jiang*^a

Author affiliations

* Corresponding authors

^a Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing, P. R. China
E-mail: wsong@iccas.ac.cn, jianglei@iccas.ac.cn
Fax: (+86) 10-62557908

Abstract

TiO₂ porous nanospheres on polypropylene (PP) films (TiO₂/PP composite) are produced at ambient temperature. Particle/pore size match up is the key anchoring point to overcome the low affinity between hydrophilic materials and hydrophobic materials. With the hydrophilic TiO₂ catalyst evenly dispersed on a hydrophobic surface, the aqueous solution will selectively skip the substrate and wet the catalysts. Such a wettability-induced smart system maximizes the degrading activity of the TiO₂ catalyst. In photodegrading reactions, the resulting TiO₂/PP composite film exhibits a 10 times higher activity in flow-type setup than the same TiO₂ catalyst in a traditional batch-type setup.

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Supplementary files

XRD results for TiO ₂ porous nanospheres; photos of Methylene Blue, and Rhodamine B (100 mg L ⁻¹) aqueous solution degraded by TiO ₂/PP composite film under UV irradiation in the flow type setup as well as the quantitative plots of concentration profiles; contact angle of water droplets on TiO ₂ porous spheres and on PP membrane; SEM image of used TiO ₂/PP composite PDF (127K)

Article information

DOI: https://doi.org/10.1039/C0NR00182A
Article type: Paper
Submitted: 10 Mar 2010
Accepted: 01 Apr 2010
First published: 08 Jun 2010

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Nanoscale, 2010,2, 1480-1484

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Hydrophilic TiO₂ porous spheres anchored on hydrophobic polypropylene membrane for wettability induced high photodegrading activities

F. Niu, L. Zhang, C. Chen, W. Li, L. Li, W. Song and L. Jiang, Nanoscale, 2010, 2, 1480 DOI: 10.1039/C0NR00182A

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