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Lookup NU author(s): Professor David XieORCiD
This is the authors' accepted manuscript of an article that has been published in its final definitive form by Elsevier, 2018.
For re-use rights please refer to the publisher's terms and conditions.
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.
Author(s): Zhang T, Elma M, Xie F, Motuzas J, Zhang X, Wang DK
Publication type: Article
Publication status: Published
Journal: Separation and Purification Technology
Year: 2018
Volume: 206
Pages: 99-106
Print publication date: 29/11/2018
Online publication date: 30/05/2018
Acceptance date: 29/05/2018
Date deposited: 31/08/2023
ISSN (print): 1383-5866
ISSN (electronic): 1873-3794
Publisher: Elsevier
URL: https://doi.org/10.1016/j.seppur.2018.05.063
DOI: 10.1016/j.seppur.2018.05.063
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