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Graphene Oxide Synthesis by using Citric Acid via Pyrolysis Method

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Graphene Oxide Synthesis by using Citric Acid via Pyrolysis Method - InstaNANO. https://instanano.com/all/nanomaterial-synthesis/carbon/graphene-oxide-3/ (accessed March 28th, 2024).

Graphene oxide can easily be synthesized by using citric acid as precursor via treating it at a temperature of around 200 degrees celsius.

  1. CHECK LIST
    Citric Acid, Sodium Hydroxide, Deionized Water, RB Flask, Magnetic stirrer

  2. STEP 1.
    Take 5g Citric Acid in RB Flask and set temperature at 200ÂșC.

  3. STEP 2.
    Color of Citric acid will change to light Yellow (after 5 min), to Orange (after 30 min), to dark Brown (after 60 min). Dark Brown color solution was used for the next step.

  4. STEP 3.
    Add 3.5g Sodium Hydroxide in 100ml of deionized water.

  5. STEP 4.
    Add the Dark Brown liquid (prepared in step-2) in Sodium Hydroxide Solution (prepared in step-3) drop wise.

  6. STEP 5.
    After adding the solution will become light brown indicates the formation of Graphene Oxide.

  7. RESULTS
    Brown color indicates the formation of Graphene Oxide. You can go for Raman Spectroscopy for the characterization and explore InstaNANO for Raman of Graphene and Graphene Oxide and other characterization of Graphene Oxide.

  8. Factors Affecting Synthesis
    Time Taken in Step-2: Time is very crucial factor in the synthesis of Graphene Oxide from Citric acid in the Step 4. As the time increases the size of the Graphene sheets also increases, it means if you take 60 minutes in the Step 4 then size of the Graphene sheets will be small as compared to 90 minutes in Step 2.
    Effect of NaOH Solution: NaOH is used in the last step of synthesis as the synthesis of Graphene Oxide occurs in the basic medium only. If you increase the concentration of NaOH in the solution then the defects in the final product may increase and you will see D-Band intensity increase in Raman Spectroscopy.

  9. NOTE: All the experiments should be done under the guidance of lab Incharge; and proper lab safety instructions.

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