Fabrication of nanostructured TiO2 hollow fiber photocatalytic membrane and application for wastewater treatment

Zhang, Xiwang, Wang, David K., Lopez, Diego Ruben Schmeda and Diniz da Costa, João C. (2014) Fabrication of nanostructured TiO2 hollow fiber photocatalytic membrane and application for wastewater treatment. Chemical Engineering Journal, 236 314-322. doi:10.1016/j.cej.2013.09.059


Author Zhang, Xiwang
Wang, David K.
Lopez, Diego Ruben Schmeda
Diniz da Costa, João C.
Title Fabrication of nanostructured TiO2 hollow fiber photocatalytic membrane and application for wastewater treatment
Formatted title
Fabrication of nanostructured TiO2 hollow fiber photocatalytic membrane and application for wastewater treatment
Journal name Chemical Engineering Journal   Check publisher's open access policy
ISSN 1385-8947
1873-3212
Publication date 2014-01-15
Year available 2013
Sub-type Article (original research)
DOI 10.1016/j.cej.2013.09.059
Volume 236
Start page 314
End page 322
Total pages 9
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Collection year 2014
Language eng
Formatted abstract
Nanostructured TiO2 hollow fiber photocatalytic membranes were fabricated in this study via a facile spinning-sintering method. The morphology, crystal phase, porosity and mechanical strength of the membranes were characterized by SEM, XRD, N2 sorption and bending test, respectively. The dimensions of the sintered hollow fibers are approximately 1.0-1.2mm in the outer diameter and 150μm in thickness. Finger-like macrovoids and sponge-like mesopores form inside the membranes whilst the TiO2 layer is denser near the outer wall of the membranes. The calcination temperature has a significant impact on the properties of the membranes. With increasing the calcination temperature, the pore size and photocatalytic activity decrease while the mechanical robustness increases. The photocatalytic activity, permeability and separation efficiency of the membranes were evaluated using both Acid Orange 7 (AO7) and raw sewage as pollutants. The membrane calcined at 900°C has a good balance between mechanical properties and photocatalytic activity. A high organic removal rate of 90.2% is achieved by the filtration and photodegradation functionalities of the membrane. The water flux of 12.2Lm-2h-1 for the membranes exposed UV irradiation is 2.2times higher than that in the absence of it, which indicates lower levels of membrane fouling. The results provide vital insights into the development of photocatalytic membranes and their applications in water treatment.
Keyword Hollow fiber
Photocatalytic membrane
TiO2
Wastewater treatment
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Published online 25 September 2013

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Official 2014 Collection
 
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