Hydrothermal &solvothermal methods jeyakiruba

Hydrothermal &solvothermal methods jeyakiruba

• 1.
  Submitted by P.Jeyakiruba PhD (RA2033003011003) SRMIST Kattankulathur,Chennai
• 2.
   The reactantsare dissolved (or placed)in water or another solvent in closed vessel.  Convensitional (or)microwave oven  Commercially tons of zeolites daily.  Hydrothermal synthesis can be defined as a method of synthesis of single crystals that depends on the solubility of minerals in hot water under high pressure.
• 4.
  Advantages  1).Simple procedure 2).low cost  3)suitable for mass production of Hap powder  4)the method of choice for commercial production. Disadvantages  1)Heterogenity in phase composition owing to the small diffusion of ions during the reaction.  2)Unattractive both scientifically &technologically.
• 6.
   Precursors aredissolved in hot solvents.(Eg n-butyl alcohol.)  Solvent other than water can provide milder & friendlier reaction conditions.  If the solvent is water then the process is referred to as hydrothermal method.  Solvothermal synthesis has been used in laboratory to make nanostructure TiO2,Graphene,carbon nanotubes& other material.
• 8.
  Solvothermal synthesis isusually performed in a reaction vessel called an autoclave