Journal
CARBOHYDRATE POLYMERS
Volume 83, Issue 2, Pages 1016-1019Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2010.08.076
Keywords
Porous starch; Citric acid; Zinc oxide; Structure directing agent
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In this communication a facile and green method is introduced for the preparation of porous starch (PS) citric acid-modified PS (CAPS) and porous ZnO PS was created by replacing ice crystals in frozen starch gel with selected solvent using a solvent exchange technique The porosity of PS was greatly affected by the ethanol/water volume ratios PS was further modified with citric acid (CA) in order to preserve or maintain its porous state especially upon contact with aqueous solution CAPS was subsequently used as a structure-directing agent to prepare ZnO with a porous network structure The thus obtained PS CAPS and porous ZnO may find their niche in applications such as adsorbent structure-directing agents for porous metal oxides or as sensors (C) 2010 Elsevier Ltd All rights reserved
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