Dear all,
I have synthesized graphitic carbon nitride through pyrolysis of melamine. Heating 400 degree Celsius for four hours. But the color of product is off white instead of pale yellow
I have seen in literature that GCN is having pale yellow color. I have tried several times but the color is same. Please give your valuable opinion on the product whether it's GCN or not after checking the image of product attached
you did not. you only partially degradate melamine. you should increase the temperature up to at least 600°C (800°C is better)
Dear Vishnu,
In my laboratory the compound is synthesized at 550ºC in nitrogen flow (a small flow of about 200-300 mL/min is sufficient) for 4 hours. The color is clearly yellow. The melamine we use is from Sigma Aldrich (99%).
Best,
Fran
Dear Vishnu,
In my laboratory the compound is synthesized at 550ºC in nitrogen flow (a small flow of about 200-300 mL/min is sufficient) for 4 hours. The color is clearly yellow. The melamine we use is from Sigma Aldrich (99%).
Best,
Fran
Dear Vishnu,
For the synthesis of graphitic carbon nitride, the heating temperature should be increased up to 550ºC for around 4 hours. The final compound will be yellow in color.
I agree with the above answers. A minimum of 520 degrees temperature is needed to prepare graphitic carbon nitride.
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