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Magnetic and Carbonaceous Nano-catalysts in Sustainable Chemical Transformations
Citation:
Varma, R. Magnetic and Carbonaceous Nano-catalysts in Sustainable Chemical Transformations. 255th American Chemical Society National Meeting & Exposition, New Orleans,LA, March 18 - 22, 2018.
Impact/Purpose:
An invited oral presentation at the Catalysis (CATL) section of the 255th American Chemical Society National Meeting & Exposition, March 18-22, 2018, New Orleans, LA
Description:
Sustainable efforts in greener assembly of nanoparticles and their diverse applications as nano-catalysts are gaining importance in catalysis arena [1]. Vitamins B1, B2, B12, C, beet juice, and phenolic antioxidants from a variety of sources assist in ready access to bulk quantities of nanomaterials under eco-friendly conditions [2]. Microwave-assisted processes deliver uniformly-sized magnetic nanoferrites and micro-pine structured catalysts from common metal salts. Sustainable routes to nanoparticles using waste from winery [3a], or biodiesel byproduct, glycerol [3b] and their applications in catalysis with emphasis on recyclability and reuse via magnetic separation will be highlighted; examples include Pd, Ni, Ru, Ce, Cu etc. adorned on biodegradable and recyclable earth-abundant supports namely cellulose, chitosan or on magnetic ferrites via ligands such as dopamine or glutathione [4]. The utility of heterogenized bimetallic Ag-Pd nanoparticles on graphitic carbon nitride (AgPd@g-C3N4) will be highlighted in upgrading of biofuel under visible light using formic acid as a hydrogen source including direct aminoformylation of nitroarenes [5]. An array of photocatalytic C-H activation reactions using VO@g-C3N4 using visible light as the source of energy will be described [6]; these strategies capitalize on the use of waste that can sustainably generate N-enriched carbonaceous catalytic materials valuable in executing greener transformations with minimal environmental impact. References [1] M. B. Gawande, A. Goswami, F.-X. Felpin, T. Asefa, X. Huang, R. Silva, X. Zou, R. Zboril, R. S. Varma, Chem. Rev., 116, 3722-3811 (2016); R. S. Varma, Green Chem., 16, 2027-2041 (2014); R. S. Varma, ACS Sustain. Chem. Eng., 4, 5866-5878 (2016). [2] R. S. Varma, Curr. Opin. Chem. Eng., 1, 123 (2012). [3] (a) B. Baruwati, R. S. Varma, ChemSusChem, 2, 1041 (2006); (b) J. Kou, R. S. Varma, Chem. Commun., 49, 692 (2013). [4] M. Gawande, P. Branco, R.S. Varma, Chem. Soc. Rev., 42, 3317 (2013); R. B. Nasir Baig, M. N. Nadagouda, R. S. Varma, Coord. Chem. Rev., 287, 137 (2015). [5] S. Verma, R. B. Nasir Baig, M. N. Nadagouda, R. S. Varma, Green Chem., 18, 1019 (2016). [6] S. Verma, R. B. Nasir Baig, C. Han, M. N. Nadagouda, R. S. Varma, Chem. Commun., 51, 15554 (2015); S. Verma, R. B. Nasir Baig, M. N. Nadagouda, R. S. Varma, ACS Sustain. Chem. Eng., 4, 2333 (2016).