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Biopolymer templated porous TiO2: An efficient catalyst for the conversion of unutilized sugars derived from hemicellulose

Paper ID Volume ID Publish Year Pages File Format Full-Text
40834 45867 2012 7 PDF Available
Title
Biopolymer templated porous TiO2: An efficient catalyst for the conversion of unutilized sugars derived from hemicellulose
Abstract

An efficient procedure for the conversion of unutilized abundant sugar derivatives, such as d-mannose, d-galactose and lactose, into platform molecule 5-hydroxymethylfurfural in aqueous and organic medium is reported. This process involves biopolymer sodium alginate templated porous TiO2 nanocatalysts containing strong Lewis acidic sites as determined by pyridine-IR and temperature programmed desorption (TPD) of ammonia studies. Porous TiO2 materials were characterized by XRD, SEM, HR-TEM and N2 sorption techniques. Biopolymer templating pathway provided effective synthetic route for the TiO2 nanomaterials, which contain considerable mesoscopic void space as revealed from the HR-TEM and N2 sorption studies. Using this TiO2 catalyst, improved HMF yields were obtained without using expensive ionic liquids as solvents. Hydrothermally obtained TiO2 nanocatalysts showed maximum activity in d-mannose conversion to HMF, whereas nonporous TiO2 is inactive in this reaction. Porosity (surface area), small particle size and strong acidic sites generated through biopolymer templating pathway are crucial for high catalytic activity.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (389 K)Download as PowerPoint slideHighlights► Biopolymer templating for high surface area TiO2 with mesoscopic void space. ► Lewis acidity in biopolymer templated porous TiO2. ► Utilization of epimers of glucose: mannose, galactose, and lactose as feedstocks. ► Microwave assisted HMF synthesis via nanocatalysis. ► Sustainable chemistry for the synthesis of fine chemicals from biorenewables.

Keywords
Biopolymer templating; Mesoporosity; Nanostructure; Biomass; Platform chemical; Mannose
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Biopolymer templated porous TiO2: An efficient catalyst for the conversion of unutilized sugars derived from hemicellulose
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volumes 435–436, 5 September 2012, Pages 197–203
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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