Submission of Proposal under Star College Scheme

Project: 13
Synthesis of schiff’s base using Microwave


Aim:
To prepare schiff’s base from aniline and benzaldehyde using microwave and compare its yield with that of conventional method.


Requirements:
Aniline, benzaldehyde,lime juice.


PROCEDURE:
Take about 2 cm³ of aniline and 2 cm³ of benzaldehyde in dry conicalflask, add about 5-6 drops of fresh lime juice carry out the reaction in microwave for 45 secs. Cool the mixture to obtain product. Filter the solid,wash with water, recrystallise the crude product from about from absolute alcohol. Dry weigh and determine the melting point of the product.


Reaction:


Observation:
1) Weight of the product = ________ g
2) Theoretical yield =_________g


Result:

1. 
   M.P of the product =_________ g
   
2. 
   Percentage yield (using microwave) =_________ g
   
3. 
   Percentage yield (using conventional method) = _________g
   

Inference:
Project: 14


SYNTHESIS OF ZINC OXIDE NANOPARTICLES BY PRECIPITATION METHOD


Aim:
To synthesize zinc oxide nano particles by the alkaline precipitation method.


Chemicals Required:
Zinc acetate dihydrate, sodium hydroxide, triethanolamine, ethanol.
Apparatus required: 250 ml Round bottom flask, 50 ml measuring cylinder, magnetic stirrer with temperature control.


Theory:
The unique properties of nanomaterials have motivated the researchers to develop a simpler, rapid and an inexpensive technique to produce nanostructures of technologically important materials. Nano-structure zinc oxide, an n-type II-VI compound semiconductor has widerange applications ZnO nanoparticles can be prepared on a large scale at low cost by simple alkali precipitation. .This study is aimed at the synthesis of ZnO nanoparticles from zinc acetate dihydrate and sodiumhydroxide in the ethanol rich phase using triethanolamine (TEA) as surface acting agent..


Procedure:

1. 
   Prepare zinc acetate solution by dissolving 0.001 mole of Zn(CH3COO)2.2H20 in 50 ml of water.
   
2. 
   Prepare the alkaline mixture solution by dissolving NaOH (0.002 mole) and TEA (0.003 mole) in 100 ml of absolute ethanol.
   
3. 
   Stir the mixture until a homogeneous solution is obtained
   
4. 
   Add the zinc salt solution into the alkaline mixture solution and subject it to magnetic stirring at 60-70^°C for 2 hours.
   
5. 
   After 2 hrs, allow the product to cool naturally at room temperature.
   
6. 
   Wash the resulting product with ethanol to remove the organic agent TEA and hydroxide ions and filter and dry in oven at 60^°Cfor 3 hours.
   

Result:

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