Adsorption and photocatalytic degradation of methylene blue over hydrogen-titanate nanofibres produced by a peroxide method

Article


El Saliby, Ibrahim, Erdei, Laszlo, Kim, Jong-Ho and Shon, Ho Kyong. 2013. "Adsorption and photocatalytic degradation of methylene blue over hydrogen-titanate nanofibres produced by a peroxide method." Water Research. 47 (12), pp. 4115-4125. https://doi.org/10.1016/j.watres.2012.12.045
Article Title

Adsorption and photocatalytic degradation of methylene blue over hydrogen-titanate nanofibres produced by a peroxide method

ERA Journal ID4694
Article CategoryArticle
AuthorsEl Saliby, Ibrahim (Author), Erdei, Laszlo (Author), Kim, Jong-Ho (Author) and Shon, Ho Kyong (Author)
Journal TitleWater Research
Journal Citation47 (12), pp. 4115-4125
Number of Pages11
Year2013
Place of PublicationUnited Kingdom
ISSN0043-1354
1879-2448
Digital Object Identifier (DOI)https://doi.org/10.1016/j.watres.2012.12.045
Web Address (URL)https://www.sciencedirect.com/science/article/pii/S004313541300198X
Abstract

In this study, Degussa P25 TiO2 was partially dissolved in a mixture of hydrogen peroxide and sodium hydroxide at high pH. The fabrication of nanofibres proceeded by the hydrothermal treatment of the solution at 80°C. This was followed by acid wash in HCl at pH 2 for 60min, which resulted in the formation of hydrogen-titanate nanofibres. The nanofibres were annealed at 550°C for 6h to produce crystalline anatase nanofibres. The nanofibres were characterised for physico-chemical modifications and tested for the adsorption and photocatalytic degradation of methylene blue as a model water pollutant. An average specific surface area of 31.54m2/g, average pore volume of 0.10cm3/g and average pore size of 50Å were recorded. The nanofibres were effective adsorbents of the model pollutant and adsorbents and good photocatalysts under simulated solar light illumination. No reduction in photocatalytic activity was observed over three complete treatment cycles, and the effective separation of nanofibres was achieved by gravity settling resulting in low residual solution turbidity.

Keywordsadsorption; hydrogen peroxide; nanofibres; photocatalysis; titanium dioxide; water purification
ANZSRC Field of Research 2020400411. Water treatment processes
410306. Environmental nanotechnology and nanometrology
401807. Nanomaterials
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Byline AffiliationsUniversity of Technology Sydney
Department of Agricultural, Civil and Environmental Engineering
Chonnam National University, Korea
Institution of OriginUniversity of Southern Queensland
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