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Issue 44, 2014
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Electrospun anatase TiO2 nanofibers with ordered mesoporosity

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Abstract

Anatase TiO2 nanofibers (200–300 nm in diameter) with 3-dimensionally (3D) ordered pore structure and high surface area were synthesized by electrospinning technique. The unique combination of partially acetylacetone chelated Ti-alkoxide, viscosity-controlling cum high positive charge balancing agent PVP and structure director F127 yielded nanofibers with ordered mesoporosity similar to the Pm[3 with combining macron]m structure. Dynamic heating of the fibers in the temperature range 350–540 °C and simultaneous XRD studies revealed that the amorphous to anatase transformation initiated at about 400 °C with the retention of 3D mesoporosity up to the final heat-treatment stage. TEM studies also confirmed this. During amorphous to anatase conversion, the surface area decreased from 165 (350 °C) to 90 m2 g−1 (540 °C). The crystalline mesoporous nanofibers showed enhanced photocatalytic activity with reusability.

Graphical abstract: Electrospun anatase TiO2 nanofibers with ordered mesoporosity

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Publication details

The article was received on 29 Aug 2014, accepted on 23 Sep 2014 and first published on 23 Sep 2014


Article type: Paper
DOI: 10.1039/C4TA04481A
Citation: J. Mater. Chem. A, 2014,2, 19029-19035
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    Electrospun anatase TiO2 nanofibers with ordered mesoporosity

    S. Chattopadhyay, J. Saha and G. De, J. Mater. Chem. A, 2014, 2, 19029
    DOI: 10.1039/C4TA04481A

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