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Greener Syntheses and Chemical Transformations Using SustainableAlternative Methods and Nano-Catalysts
Citation:
VARMA, R. S. Greener Syntheses and Chemical Transformations Using SustainableAlternative Methods and Nano-Catalysts. Presented at 2nd Annual Bio-based Chemicals Summit, San Diego, CA, February 14 - 17, 2011.
Impact/Purpose:
To inform EPA
Description:
The presentation summarizes our sustainable chemical synthesis activity involving benign alternatives, namely greener reaction medium in aqueous or solventfree conditions and using alternative activation via microwave or photocatalytic activation. Eco-friendly synthesis of nanomaterials using vitamins B1, B2, C, and tea and wine polyphenols which function both as reducing and capping agents, provide extremely simple, one-pot, greener routes to bulk quantities of nanomaterials in water. Shapecontrolled synthesis of noble nanostructures via MW-assisted spontaneous reduction of noble metal salts using sugars and general method for the cross-linking reaction of poly (vinyl alcohol) (PVA) with metallic systems; bimetallic systems, and SWNT, MWNT, and C-60 will be presented. The strategy is extended to the formation of odegradable carboxymethylcellulose (CMC) composite films with noble nanometals. The synthesis of magnetic nanoferrites by MW hydrothermal process and sustainable route to nano particles using polyphenols from winery waste and their applications in catalysis will be highlighted.