• Prof. RAJENDER S. VARMA
  • Prof. RAJENDER S. VARMA
  • Czech Republic Laboratory, USA
  • Title: SUSTAINABLE CATALYSIS WITH NANOPARTICLES WITH MAGNETIC CORE AND MODIFIED GRAPHITIC CARBON NITRIDES
  • Abstract:

    Sustainable synthetic efforts[1] involving alternate energy input,[2] and greener reaction medium will be summarized; these reactions are catalyzed by basic water or recyclable and reusable magnetic nano-catalysts in aqueous media using microwave (MW) irradiation.[2]

    Vitamins B1, B2, C, and tea, beet juice and wine polyphenols, functioning both as reducing and capping agents, provide extremely simple, one-pot, green synthetic methods for nanomaterials.[3] The utility of nano-catalysts (Pd, Au, Ag, Ni, Ru, Ce, Cu etc.) immobilized on biodegradable and recyclable supports e.g. cellulose and chitosan or on magnetic ferrites via ligands such as dopamine or glutathione will be presented.[5] The utility of heterogenized bimetallic Ag-Pd nanoparticles on graphitic carbon nitride (AgPd@g-C3N4) will be highlighted exemplified by upgrading of biofuel via hydrodeoxygenation of vanillin under visible light irradiation using formic acid as a hydrogen source .[6] Photocatalytic C-H activation using VO@g-C3N4 catalyst for direct oxidative esterification of alcohols, oxygen insertion reaction in hydrocarbons and selective oxidation of alcohols using visible light as the source of energy will be described .[7] The approach fulfills most of Green Chemistry Principles while producing functional chemicals with extreme level of waste minimization.

    References

    [1] R. S. Varma, Green Chem. 2014, 16, 2027; Pure Appl. Chem. 2013, 85, 1703; Green Chem. 1999, 1, 43.

    [2] (a) M. Gawande, S.Shelke, R. Zboril, R. S. Varma, Acc. Chem. Res., 2014, 47, 1338; (b) M.Nadagouda, T. Speth, R. S. Varma, Acc. Chem. Res. 2011, 44, 469; (c) R. Nasir Baig, R. S. Varma, Chem. Soc. Rev., 2012, 41, 1559; (d) A. K. Rathi, M. B. Gawande, R. Zboril, R. S. Varma, Coord. Chem. Rev., 2015, 291, 68-94.

    [3] (a) D. Hebbalalu, J. Lalley, M.N. Nadagouda, R.S. Varma, ACS Sustain. Chem. Eng., 2013, 1, 703; (b) R. S. Varma: Curr. Opin. Chem. Eng., 2012, 1, 123.

    [4] R.B. Nasir Baig, R. S. Varma, Green Chem. 2012, 14, 625; Chem. Commun. 2012, 48, 2582; Chem. Commun. 2012, 48, 6220; Chem. Commun. 2013, 49, 692; ACS Sustain. Chem. Eng., 2014, 2, 2155; B.R. Vaddula, A. Saha, J. Leazer, R. S. Varma, Green Chem. 2012, 14, 2133; M. Gawande, P. Branco, R.S. Varma, Chem. Soc. Rev. 2013, 42, 3317; Nasir Baig, R. B.; Nadagouda, M. N; Varma, R. S. Green Chem. 2014, 16, 4333; Hudson, R.; Feng, Y.; Varma, R. S.; Moores, A. Green Chem., 2014, 16, 4493.

    [5] V. Polshettiwar, M. Nadagouda, R.S. Varma, Chem. Commun. 2008, 6318; V. Polshettiwar, B. Baruwati, R.S. Varma, ACS Nano 2009, 3, 728; V. Polshettiwar, R.S. Varma, Green Chem., 2010, 12, 743.

    [6] S. Verma, R. B. Nasir Baig, M. N. Nadagouda, R. S. Varma, Green Chem., 2016, 18, 1327.

    [7] (a) S. Verma, R. B. Nasir Baig, C. Han, M. N. Nadagouda, R. S. Varma, Chem. Commun., 2015, 51, 15554; (b) S. Verma, R. B. Nasir Baig, C. Han, M. N. Nadagouda, R. S. Varma, Green Chem., 2016,18, 251; (c) S. Verma, R. B. Nasir Baig, M. N. Nadagouda, R. S. Varma, Green Chem., 2016,18, 1019.

  • Biography:

    H-Index: 83

    Senior Scientist, Sustainable Technology Division, National Risk Management Research Laboratory, U.S. Environmental Protection Agency, 26 West Martin Luther King Drive, MS 443, Cincinnati, OH 45268, USA;

    Google Scholar: https://scholar.google.com/citations?user=kzbCKOQAAAAJ&hl=en

    Research Gate: https://www.researchgate.net/profile/Rajender_Varma/info

    Formerly: Chemistry Research Professor, Sam Houston State University, Texas, USA

    –Project Manager, Texas Research Institute for Environmental Studies (TRIES), Texas

    –Senior Scientist, Houston Advanced Research Center, The Woodlands, Texas, USA EDUCATION: -B.Sc., 1970, Panjab University, India.

    -M.Sc., 1972, Kurukshetra University, India.

    -Ph.D., 1976, Delhi University, India, Natural Products Chemistry;

    Diploma, Pulp & Paper Technology, 1977, Norwegian Institute Technology, Norway.

    Postdoctoral Fellow-Robert Robinson Laboratories, University of Liverpool, England.

    PATENTS AND PUBLICATIONS: -14 US Patents awarded some others pending. ~435 peer-reviewed papers, 6 books, 26 book chapters & 3 encyclopedia contributions.

    AREAS OF EXPERTISE: Development of Environmentally Benign Synthetic Methods and Chemical Protocols, Greener Synthesis of Nanomaterials and Nanocomposites and their Applications in Nano-catalysis (magnetically retrievable nano-catalysts) and Sustainable Remediation of Hazardous Pollutants [e.g. contaminated sites and streams using nanoscale iron, mercury capture from coal-fired power plants, removal of sulfur (deep desulfurization) from diesel oil etc.], Natural Products; Synthetic Organic Chemistry, Methods for Immobilization of Biomolecules on Support Surfaces; Design & Synthesis of Chemopreventive anti-cancer Agents.

    ABOUT RESEARCH: Over 40 years of research experience in management of multi-disciplinary technical programs. Extensively involved in broader aspects of chemistry that includes development of eco-friendly synthetic methods using alternate energy input (microwave, ultrasound & mechanochemical). Long term goals are to contribute broad expertise in chemistry to evaluate novel and safer environmental protocols in industrial chemistry and its impact in human health and environmental sciences. Mentor for high school, college and university students.

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June 1-3, 2016
 
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February 1, 2016  >> April 26, 2016
 
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