Development of visible light sensitive titania photocatalysts by combined nitrogen and silver doping

Article


El Saliby, Ibrahim, Erdei, Laszlo, Shon, Ho Kyong and Kim, Jong-Ho. 2011. "Development of visible light sensitive titania photocatalysts by combined nitrogen and silver doping." Journal of Industrial and Engineering Chemistry. 17 (2), pp. 358-363. https://doi.org/10.1016/j.jiec.2011.02.039
Article Title

Development of visible light sensitive titania photocatalysts by combined nitrogen and silver doping

ERA Journal ID124478
Article CategoryArticle
AuthorsEl Saliby, Ibrahim (Author), Erdei, Laszlo (Author), Shon, Ho Kyong (Author) and Kim, Jong-Ho (Author)
Journal TitleJournal of Industrial and Engineering Chemistry
Journal Citation17 (2), pp. 358-363
Number of Pages6
Year2011
PublisherElsevier
Place of PublicationNetherlands
ISSN1226-086X
1876-794X
Digital Object Identifier (DOI)https://doi.org/10.1016/j.jiec.2011.02.039
Web Address (URL)https://www.sciencedirect.com/science/article/pii/S1226086X11000517
Abstract

In this study we present the effects of non-metal (nitrogen) and metal/non-metal (silver/nitrogen) dopants on titanium dioxide (TiO2) in synthesising visible-light reactive photocatalysts. Nanopowders of TiO2-N and TiO2-N–Ag were synthesised using a simple procedure at room temperature. For nitrogen doping, a dispersion of Degussa P-25 was treated with ammonium hydroxide. The obtained modified catalyst was further treated with silver nitrate powder to facilitate silver-nitrogen co-doping. The produced catalysts were characterised using X-ray diffraction, X-ray photoelectron spectroscopy, and specific surface area measurements. Scanning electron microscopy/energy dispersive X-ray and transmission electron microscopy were adapted to detect changes in the morphology and in the chemical composition of synthesised catalysts. The results show that both the morphology and appearance of catalysts were modified to yield nanopowders of yellowish color and relatively high specific surface area. Methylene blue (MB) dye was used as a model aquatic contaminant in 23 mg/L concentration to study the performance of these novel photocatalysts in an aerobic mixed batch reactor system under white light irradiation. Both nitrogen and nitrogen-silver co-doping lead to visible light sensitivity and the new catalysts showed remarkable activities in the decolorisation of MB.

Keywordstitanium dioxide; silver-doped; nitrogen-doped; photocatalyst
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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