Hello,
I am trying to synthesize graphitic carbon nitride, and in all the literature I have read, a heating rate of 2 to 3°C/min is used.
Due to limitations of my lab furnace, I am currently unable to alter the default heating rate of 10°C/min. Therefore, whenever I have proceeded with this heating rate I unable to replicate the results of existing literature (while keeping other factors such as the mass, precursor and synthesis temperature fairly the same).
I understand that there may be other reasons for the discrepancy, but I would like to know whether the rate of heating is crucial to the synthesis of g-CN, and whether I would need to apply a rate of 2 to 3°C/min for its successful synthesis.
Please note that the precursor I am using is Urea.
Thank you,
Joshua Nigel
Dear all, please check the following documents. My Regards
https://link.springer.com/article/10.1007/s10854-018-9906-2?shared-article-renderer
https://doi.org/10.1155/2013/685038
https://www.researchgate.net/publication/342242989_Influence_of_High_Temperature_Synthesis_on_the_Structure_of_Graphitic_Carbon_Nitride_and_Its_Hydrogen_Generation_Ability
https://www.researchgate.net/publication/311002814_Synthesis_of_graphitic_carbon_nitride_by_heating_mixture_of_urea_and_thiourea_for_enhanced_photocatalytic_H2_production_from_water_under_visible_light
Dear all, please check the following documents. My Regards
https://link.springer.com/article/10.1007/s10854-018-9906-2?shared-article-renderer
https://doi.org/10.1155/2013/685038
https://www.researchgate.net/publication/342242989_Influence_of_High_Temperature_Synthesis_on_the_Structure_of_Graphitic_Carbon_Nitride_and_Its_Hydrogen_Generation_Ability
https://www.researchgate.net/publication/311002814_Synthesis_of_graphitic_carbon_nitride_by_heating_mixture_of_urea_and_thiourea_for_enhanced_photocatalytic_H2_production_from_water_under_visible_light
Yes, rate of heating influences the many properties of the required samples.
It may also alter the crystallinity of the sample.
You may contact in CSR, Indore for this.
Regards
Khalid Mohd.
Dear Mr. Khalid,
Prior to posting this question, I have performed the synthesis twice so far. Both times it was under regular atmospheric conditions, not an inert environment.
Trial 1:
50g of urea at 600oC (heating rate of 10°C/min) for 2.5 hours.
Trial 2:
15g of urea at 550oC (heating rate of 10°C/min) for 3 hours.
I believe that the polymerization still isn't complete and my products are at the melem stage (judging from the FTIR graph and the color of the sample). After reading the paper on carbon nitride lithium-sulfur batteries suggested by Mr. Abdelkader BOUAZIZ, I feel more strongly about this (as their procedure involved a heating time of 4 hours).
Therefore, by simply increasing the time of heating I should be able to achieve positive results. Thus, I intend on repeating the process at either 550°C or 600°C, for 4 hours.
I would appreciate if anyone could provide me with their feedback regarding this, and the data I have uploaded.
Thank you,
Joshua Nigel
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