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2 4/04/12

Starbons and their applications . Dr. Vitaliy Budarin. 2 4/04/12. 1. www.greenchemistry.net. Contents. Introduction to mesoporous materials Starbon technology Starbon applications: Nanotechnology Catalysis Water treatment Chromatography. 2 4/04/12. 2. www.greenchemistry.net.

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2 4/04/12

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  1. Starbons and their applications Dr.VitaliyBudarin 24/04/12 1 www.greenchemistry.net

  2. Contents • Introduction to mesoporous materials • Starbon technology • Starbonapplications: • Nanotechnology • Catalysis • Water treatment • Chromatography 24/04/12 2 www.greenchemistry.net

  3. Porousmaterials 24/04/12 3 www.greenchemistry.net

  4. Potential applications of mesoporous materials Adsorption Chromatography Nanotechnology Electrochemistry Catalysis Filtration Sensors 24/04/12 4 www.greenchemistry.net

  5. Synthesis of Mesoporus materials Benefits: regular & well ordered • Costly • Wasteful • Complicated • Time consuming • Limited functionality Technologies Limitation: 24/04/12

  6. Native mesoporous materials Nature is adept at the self assembly of organic polymers in a wide range of structural and storage roles in higher plants Is porous structures of native materials accessible for chemistry? 24/04/12 6 www.greenchemistry.net

  7. Expanded starch formation • Methodology utilises: • Starch • inexpensive, biomass • green solvents • water, ethanol and ScCO2 24/04/12 7 Chem.Commun, 2002, 2632 www.greenchemistry.net

  8. Starbonisation Mesoporous Carbon Starbons Starch H+ 1000C 7000C Angew. Chem. Int. Ed, 2006 45 3782 24/04/12 8 www.greenchemistry.net

  9. Starbon. Texture properties 1 nm Micropore Mesopore 10 nm

  10. 24/04/12

  11. Starbon. Textural properties.Influence of the preparation temperature. • 4000C Starbon • 6000C Starbon SEM of Starbons 24/04/12 11 www.greenchemistry.net

  12. Starbons functionality Applications Organic adsorption Metal adsorption Nanotechnology Chromatography Acid catalysis 24/04/12 12 www.greenchemistry.net

  13. Starbon Surface modification Starbon surface can be modified with: • Halogens • Sulfuric acid • Amines • Chitosan • Phosphates 24/04/12 13 www.greenchemistry.net

  14. Starbon application: Synthesis of nanoparticles • The nanoparticle size distribution was controllable by pore structure of Starbon 24/04/12 14 Green Chemistry 10 (4), 382-387, 2008 www.greenchemistry.net

  15. Starbon application:Acid catalysis in water-organic mixture • Catalyst preparation: • Sulfonation: 400C, 2 h. • Washing: • water • water-ethanol mixture, 800C Succinic acid esterification.Starbon-350@SO3H Chem.Eur.J., 2007, 13, 6914 14/03/11 15 www.greenchemistry.net

  16. Rationale for activity • Esterification should be poor in water • Selective adsorption / exclusion of water? • Reaction in pore / on surface • Product desorbed and stable in aqueous environment 24/04/12 16 www.greenchemistry.net

  17. Adsorption of acids. Starbon-4000C 400oC Starbon the best for succinic acid Correlates with catalysis (?) 17 24/04/12 www.greenchemistry.net

  18. Starbon application:Decolourisation of peat water Peat based soils West coast of Scotland, Ireland Northern England • Low Polarity favoured for silicas and Starbons • Starbons better (high pore size ) • Best adsorbs ca. 200mg/g 24/04/12 18 www.greenchemistry.net

  19. Adsorption kineticMethylene blue • High mesoporosity tend to increase rate of adsorption 24/04/12 19 www.greenchemistry.net

  20. Starbon application:Decolourisation of peat water • No acid catalyst • 95% mesoporosity • Good sugar isomer separation 24/04/12 20 Advanced Functional Materials, 20 (11), 1834-1841, 2010 www.greenchemistry.net

  21. Conclusions 24/04/12 21 • Starbon technology is an overall more environmental friendly as compared to commercially available mesoporous materials • Starbons are versatile mesoporous materials • Functionality can be controlled by preparation method • Starbons demonstrated great promise in: • Catalysis • Adsorption • Nano technology • Chromatography www.greenchemistry.net

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