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Rapid thermally processed hierarchical titania-based hollow fibres with tunable physicochemical and photocatalytic properties

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Zhang, Tianlong, Elma, Muthia, Xie, Fengwei, Motuzas, Julius, Zhang, Xiwang and Wang, David K. (2018) Rapid thermally processed hierarchical titania-based hollow fibres with tunable physicochemical and photocatalytic properties. Separation and Purification Technology, 206 . pp. 99-106. doi:10.1016/j.seppur.2018.05.063

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Official URL: http://dx.doi.org/10.1016/j.seppur.2018.05.063

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Abstract

A series of photocatalytic TiO2–carbon composite hollow fibres (HFs) was prepared in this study by a wet-dry phase inversion spinning method followed by a rapid thermal processing (RTP). The RTP method consists of two stages: (1) calcination at 800 °C for 15 min encased in a quartz tube followed by (2) a short open heating exposure at 800 °C for 0 to 7.5 min in air. The innovative two-stage RTP method led to a time saving of more than 90%. Results revealed that the pyrolysis conditions during the second stage of HF fabrication were essential to the final physical and chemical properties of resultant TiO2-carbon HFs, such as TiO2 crystallinity and carbon content, mechanical, textural and electronic properties, as well as photocatalytic reactivity. The best results show that HFs pyrolysed for a short duration (< 2 min) in the second stage produced a high microporous surface area of 217.8 m2·g−1, a good mechanical strength of 11 MPa and a TiO2 anatase-to-rutile (A/R) ratio of 1.534 on the HF surface. The HFs also achieved a 68% degradation of acid orange 7 dye with a kapp of 0.0147 min−1 based on a Langmuir-Hinshelwood model during the photocatalysis under UV light. Thus, this work provides a new synthesis protocol with significant time and cost savings to produce high-quality HFs for wastewater treatment.

Item Type: Journal Article
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
T Technology > TP Chemical technology
Divisions: Other > Institute of Advanced Study
Faculty of Science > WMG (Formerly the Warwick Manufacturing Group)
Library of Congress Subject Headings (LCSH): Rapid thermal processing, Semiconductors -- Heat treatment, Pyrolysis
Journal or Publication Title: Separation and Purification Technology
Publisher: Pergamon
ISSN: 1873-3794
Official Date: 29 November 2018
Dates:
DateEvent
29 November 2018Published
30 May 2018Available
29 May 2018Accepted
Volume: 206
Page Range: pp. 99-106
DOI: 10.1016/j.seppur.2018.05.063
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
UNSPECIFIEDUniversity of Queenslandhttp://dx.doi.org/10.13039/501100001794
UNSPECIFIEDUniversity of Sydneyhttp://dx.doi.org/10.13039/501100001774
DE150101687Australian Research Councilhttp://dx.doi.org/10.13039/501100000923
UNSPECIFIEDSydney Southeast Asia Centrehttp://viaf.org/viaf/314923831
UNSPECIFIEDH2020 European Research Councilhttp://dx.doi.org/10.13039/100010663
UNSPECIFIEDUniversity of Warwickhttp://dx.doi.org/10.13039/501100000741

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