Preparation and characterisation of mesoporous photoactive Na-titanate microspheres

Article

El Saliby, Ibrahim, Erdei, Laszlo, Shon, Ho Kyong, Kim, Jong Beom and Kim, Jong-Ho. 2011. "Preparation and characterisation of mesoporous photoactive Na-titanate microspheres." Catalysis Today. 164 (1), pp. 370-376. https://doi.org/10.1016/j.cattod.2010.11.026
Article Title

Preparation and characterisation of mesoporous photoactive Na-titanate microspheres

ERA Journal ID1417
Article CategoryArticle
AuthorsEl Saliby, Ibrahim (Author), Erdei, Laszlo (Author), Shon, Ho Kyong (Author), Kim, Jong Beom (Author) and Kim, Jong-Ho (Author)
Journal TitleCatalysis Today
Journal Citation164 (1), pp. 370-376
Number of Pages7
Year2011
Place of PublicationNetherlands
ISSN0920-5861
1873-4308
Digital Object Identifier (DOI)https://doi.org/10.1016/j.cattod.2010.11.026
Web Address (URL)https://www.sciencedirect.com/science/article/pii/S0920586110007674
Abstract

Mesoporous Na-titanate microspheres were fabricated by a simple low temperature hydrothermal synthesis. Microspheres were obtained after treating TiO2 (Degussa P-25) with a mixture of sodium hydroxide (NaOH) and hydrogen peroxide (H2O2) at 25 ◦C and 80 ◦C. The as-prepared powders were characterised by X-ray diffraction, N2 adsorption–desorption measurements and scanning electron microscope/energy dispersive X-ray spectroscopy. The as-prepared microspheres were calcined at 550 ◦C to investigate the effect of calcination on morphology and characteristics. Microspheres were tested for the adsorption and photodecomposition of methylene blue (MB) under ultraviolet light. The results revealed that microspheres with average diameter of 700 nm were formed by self-assembly of tiny TiO2 nanoparticles during the reaction at 25 ◦C, whereas spherical aggregation of nanofibres was detected in powders produced at 80 ◦C. Calcination of samples had low impact on morphology, adsorption and photocatalytic degradation of MB. These novel materials are effective adsorbents of MB, and also capable of its photodecolorisation.

KeywordsNa-titanate; methylene blue; microspheres; mesoporoustitanium dioxide
ANZSRC Field of Research 2020400410. Wastewater treatment processes
410306. Environmental nanotechnology and nanometrology
401605. Functional materials
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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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