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Ceramic aerogels from TEMPO-oxidized cellulose nanofibre templates: Synthesis, characterization, and photocatalytic properties

Paper ID Volume ID Publish Year Pages File Format Full-Text
26027 43930 2013 8 PDF Available
Title
Ceramic aerogels from TEMPO-oxidized cellulose nanofibre templates: Synthesis, characterization, and photocatalytic properties
Abstract

•TiO2 and TiO2/SiO2 aerogels were prepared via sol–gel approach using TEMPO-oxidized cellulose nanofibres as template.•The materials showed high adsorption capacity and degradative photocatalytic activity toward methylene blue and rhodamine B.•The approach herein proposed is simple, green, and useful for the preparation of a larger class of ceramic cellular solids.

Aerogels are highly porous materials whose interesting chemico-physical properties can be exploited in several advanced applications. Ceramic aerogels based on titanium oxides, allow coupling the physical properties with the photocatalytic role of TiO2 in promoting pollutant photodegradation, selective organic photosynthesis, and antibacterial activity. Here, we prepared hybrid organic-ceramic aerogels via one-pot approach by mixing aqueous hydrogels of cellulose nanofibres with TiO2 or TiO2/SiO2 sols and subsequent freeze-drying of the obtained mixtures. The further calcination of the hybrid materials at suitable temperatures allowed achieving ceramic aerogels able to combine a pronounced adsorption efficiency of organic molecules with photocatalytic activity. The new materials have been characterized in terms of morphology, structure, and heterogeneous photo-degradation ability of potential pollutants. A possible explanation for the different behavior in adsorption affinity and photocatalytic efficiency is reported on the basis of the experimental evidences.

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Keywords
Cellulose; Cellular solids; Aerogels; Titanium oxide; Nano-fibers; Photocatalysis
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Ceramic aerogels from TEMPO-oxidized cellulose nanofibre templates: Synthesis, characterization, and photocatalytic properties
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 261, 1 June 2013, Pages 53–60
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us