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Influence of the chemical synthesis on the physicochemical properties of N-TiO2 nanoparticles

Paper ID Volume ID Publish Year Pages File Format Full-Text
55026 47038 2013 6 PDF Available
Title
Influence of the chemical synthesis on the physicochemical properties of N-TiO2 nanoparticles
Abstract

Nitrogen doped TiO2 materials were successfully prepared following three different preparation routes (sol–gel, hydrothermal and pyrolysis) and characterized by various spectroscopic techniques. All samples absorbed radiation in the visible range and were active in the photocatalytic degradation of cyanotoxin microcystin-LR under visible light and in acidic conditions. The different preparation routes led to the formation of various impurities into the solids. In the case of hydrothermal and sol–gel samples, these impurities were weakly bound at the surface whereas the materials prepared by pyrolysis, the impurities showed a relevant stability and could not be removed even at high temperature. These species can affect the photocatalytic performance in different ways depending on their bulk or surface nature. On the basis of the photocatalytic data illustrated in this paper, the presence of such species at the surface was not detrimental for the photocatalytic activity of nitrogen doped TiO2 but actually contributed to a higher interaction with the target cyanotoxin; leading to a higher photocatalytic activity than that observed for samples prepared via the classic sol–gel method.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (160 K)Download as PowerPoint slideHighlights► Photocatalytic degradation of microcystin-LR was achieved with all N-TiO2 samples under visible light. ► In all N-TiO2 samples the photoactive species NiO• was observed. ► By-products formed during the synthesis affect the final properties of N-doped TiO2.

Keywords
MC-LR; N-TiO2; Photocatalysis; Visible light
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Influence of the chemical synthesis on the physicochemical properties of N-TiO2 nanoparticles
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 209, 15 June 2013, Pages 54–59
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
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Price was $35.95
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Price after discount Only $4.95
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