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Design and synthesis of hydrophobic and stable mesoporous polymeric solid acid with ultra strong acid strength and excellent catalytic activities for biomass transformation

Paper ID Volume ID Publish Year Pages File Format Full-Text
46326 46437 2013 9 PDF Available
Title
Design and synthesis of hydrophobic and stable mesoporous polymeric solid acid with ultra strong acid strength and excellent catalytic activities for biomass transformation
Abstract

Novel and efficient mesoporous polydivinylbenzene (PDVB) based solid strong acid (PDVB-SO3H-SO2CF3) has been successfully prepared by grafting of strong electron withdrawing group of SO2CF3 onto the network of performed mesoporous solid acid of PDVB-SO3H, which could be synthesized from sulfonation of superhydrophobic mesoporous PDVB or copolymerization of DVB with sodium p-styrene sulfonate. Characterizations of N2 sorption isotherms, TG curves and contact angle tests show that PDVB-SO3H-SO2CF3 has large Brunauer–Emmett–Teller (BET) surface area, superior thermal stability, good hydrophobicity and oleophilicity. Solid 31P NMR spectra and NH3–TPD curves show that the Brønsted acidic site in PDVB-SO3H-SO2CF3 has been significantly enhanced and rather homogeneously distributed when compared with that of PDVB-SO3H. Catalytic tests show that PDVB-SO3H-SO2CF3 exhibits excellent catalytic activities and good recyclability in biomass transformation toward transesterification to biodiesel and depolymerization of crystalline cellulose to sugars when compared with those of PDVB-SO3H, solid strong acids of SO4/ZrO2 and Nafion NR50. The excellent catalytic activity and good recyclability of PDVB-SO3H-SO2CF3 result from its unique characters such as large surface area, ultra strong acid strength, adjustable hydrophobic–oleophilic and stable network.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Introduction of SO2CF3 group enhances acid strength of PDVB-SO3H. ► Abundant mesoporosity is favorable for the fast diffusion of reactants. ► Strong acid strength results in excellent catalytic activity for biomass transformation. ► Hydrophobic–oleophilic network results in high exposition degree of active sites. ► The stable network of mesoporous solid strong acid results in its good recyclability.

Keywords
Solid strong acid; Mesoporous polymers; Hydrophobicity; Wettability; Biomass transformation
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Design and synthesis of hydrophobic and stable mesoporous polymeric solid acid with ultra strong acid strength and excellent catalytic activities for biomass transformation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volumes 136–137, 5 June 2013, Pages 193–201
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