Solution combustion method for syntheis of nano particles

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Solution combustion method for syntheis of nano particles

  1. 1. A Seminar On Synthesis Of Nano Particles By Solution Combustion Presented By K. GANAPATHI RAO (13031D6003)
  2. 2. CONTENT • • • • • • • • Introduction. Preparation Method. Flowchart. Procedure. Calcination. Advantages. Precaution. Applications.
  3. 3. Nano particles • A material or structure has at least one dimension in the Nano range, which is called as Nanomaterial or Nanostructure. • Nano is the scale range between in (1-100)nm. • cm = 10-2m, mm = 10-3m, μm = 10-6m, nm = 10-9m, pm=10-12m • Atom ≈ 0.1 nm , DNA (width) 2 nm , Protein 5 –50 nm. Virus 75 -100nm , Materials internalized by cells < 100 nm
  4. 4. Nano particles  Nanoparticles of a defined material, e.g. gold or silicon, may exhibit completely different optical, electronic and chemical behaviour compared to bulk gold or silicon.  Nanoparticles often have unexpected visible properties because they are small enough to scatter visible light rather than absorb it. Gold particles in glass 25 nm — red reflected 50 nm — green reflected 100 nm —orange reflected
  5. 5. What is Synthesis ? • Synthesis refers to a combination of two or more entities that together form something new. Synthesis mainly classified into two approaches. 1. Bottom-up approach 2. Top-down approach
  6. 6. Bottom-up Top-down Material Grains Micro Structured Unit Cell Nano Structured Molecules Atoms
  7. 7. Nano particles Solution Combustion
  8. 8. SOLUTION COMBUSTION SYNTHESIS • Solution combustion (SC) is an effective method for synthesis of nano-size materials and it has been used for the production of a variety more than 1000. • It is a traditional method. • EX: ZnO, CuO, Fe2O3 Nano particles can synthesized.
  9. 9. FLOW CHART FOR THE SOLUTION COMBUSTION SYNTHESIS START START SELECT THE OXIDIZER & FUEL SELECT THE OXIDIZER & FUEL SOLVE THE CHEMICAL EQUATION SOLVE THE CHEMICAL EQUATION TAKE PROPORTIONAL QUANTITY OF CHEMICAL AND PUT TAKE PROPORTIONAL QUANTITY OF CHEMICAL AND PUT ON HEATER ON HEATER
  10. 10. OBSERVE THE PROCESS WHILE HEATING THE MIXER OBSERVE THE PROCESS WHILE HEATING THE MIXER AFTER COMPLETED PROCESS, TAKE THE MATERIAL AFTER COMPLETED PROCESS, TAKE THE MATERIAL COMPLETELY COMPLETELY GO FOR THE CALCINATION GO FOR THE CALCINATION STOP STOP
  11. 11. Select the chemical • Choose the chemical such that from which we can get the resultant component. • Ex: Oxidizer – For CuO  Cu(NO3)2 Copper Nitrate – For ZnO  Zn(NO3)2- Zinc Nitrate. • Choose the fuel such as containing carbon and hydrogen main components • Ex: • C2H5NO2  Glycine • C6H8O6  Ascorbic acid
  12. 12. CHEMICAL EQUATION • Cu(NO3)2 + C2H5NO2  CuO + H20 + N2↑ + CO2↑ • Cu(NO3)2 + C6H8O6 CuO + H20 + N2↑ + CO2↑ • Zn(NO3)2 + C2H5NO2 ZnO + H20 + N2↑ + CO2↑ • Zn(NO3)2 + C6H8O6 ZnO + H20 + N2↑ + CO2↑ • From Rocket Fuel Chemistry the oxidation states of H=+1, N=0, O=-2, C=+4, Zn=+2, Cu=+2.
  13. 13. EQUATION BALANCING ᵠ=     FUEL OXIDATION STATE =1 9 Cu(NO3)2 + 10 C2H5NOSTATE CuO + 25 H20 + 14 N2↑ + 20 CO2↑ OXIDIZER OXIDATION 2  9 20 Cu(NO3)2 + 10 C6H8O6 20 CuO + 40 H20 + 20 N2↑ + 60CO2↑ 9 Zn(NO3)2 + 10C2H5NO2 9 ZnO + 25 H20 + 14 N2↑ + 20 CO2↑ 20 Zn(NO3)2 + 10 C6H8O6 20 ZnO + 40 H20 +20 N2↑ + 60 CO2↑
  14. 14. QUANTITY • Choose the oxidizer and fuel by calculating the (molecular weight * balancing constant). • Take the ratio of fuel/ oxidizer. • By using the electrical balance take the chemicals into butter worth paper.
  15. 15. PROCEDURE • Dissolve the oxidizer into distilled water and mix up with magnetic stirrer.
  16. 16. PROCEDURE • Dissolve the oxidizer into distilled water and mix up with magnetic stirrer. • Add fuel, again stirrer it.
  17. 17. PROCEDURE • Put the container on electrical heater.
  18. 18. PROCEDURE • Following steps will takes place – Boiling & frothing – Smoldering – Flaming – Fumes
  19. 19. PROCEDURE • After cooling the container, collect the material from the container. • And send for the calcination.
  20. 20. CALCINATION • Thermal decomposition, phase transition, or removal of a volatile fraction. • The calcination process normally takes place at temperatures below the melting point of the product materials. • For CuO, the desired temperature is 6000c and calcined the sample for atleast half an hour so that carbon will reduce to carbon dioxide.
  21. 21. SEM picture of CuO nanoparticles TEM picture of CuO nanoparticles
  22. 22. ADVANTAGE OF SCS • • • • • 20-50 nm size nanoparticles can synthesis. Less time is required. No Inert gas in required. No need of vacuum. Less cost.
  23. 23. PRECAUTIONS • Wear masks, gloves, glasses, apron & shoes.
  24. 24. Videos 1 2 3 4
  25. 25. REFRENCE • http://whynano.wordpress.com/materialsynthesis-and-characterization/ • http://www.science.uwaterloo.ca/~cchieh/ca ct/c123/oxidstat.html • http://en.wikipedia.org/wiki/List_of_oxidation _states_of_the_elements • http://www.youtube.com/watch? v=u3IDWm3XZxI

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