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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
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 | |||||||||||||||||||||
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| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering T Technology > TP Chemical technology |
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| Divisions: | Other > Institute of Advanced Study Faculty of Science > WMG (Formerly the Warwick Manufacturing Group) |
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| 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: |
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| Date of first compliant deposit: | 7 June 2018 | |||||||||||||||||||||
| 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: |
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