Factors Affecting Synthesis
Concentration of Graphite: The amount of Graphite used for the synthesis of Graphene Oxide (GO) is very important factor; because oxidation penetration on Graphite depends on the concentration of the Graphite in the Sulphuric Acid. Higher the concentration of Graphite, lesser the penetration of oxidation.
Concentration of Sulphuric Acid: Concentration of Sulphuric Acid is most important in Hummers method. Higher the concentration of Sulphuric Acid, higher the chances of complete exfoliation of Graphite into Graphene Oxide; But also very high chances of unwanted accident.
Rate of Adding Water: Rate at which water is added for the oxidation matters a lot. InstaNANO suggest you to add water drop wise very slowly to avoid unwanted accidents and to get good quality Graphene Oxide.
Effect of KMnO4: In this method, KMnO4 acts as Oxidizer, Sulphuric Acid functionalize the Graphite surface to add functional groups in the presence of reagent like KMnO4. KMnO4 should be added slowly because it increases the temperature of the reaction and may lead to incomplete oxidation at the end, if poured instantly and not stirred properly.
Role of Hydrogen Peroxide: Main role of Hydrogen Peroxide is to remove the excessive KMnO4 or in other words to stop the reaction.
Post a Comment
Its an interesting and most helpful website for researchers and for students.
ReplyDeleteYour synthesis is very good. But you didn't clarify DLS of GO. I also prepared GO and size around 280d.nm. But I want to prepare GO around 20d.nm.
ReplyDeleteI also prepared GO (my first time) and I saw H.method with NaNO3+ Graphite+ H2SO4 in Step 1, so can you tell me the roles of NaNO3 in this mixture?
ReplyDeleteThanks really practical. Will certainly share website with my buddies.
ReplyDeleteis it possible to use sucrose to produce graphite as the starting material before it being oxidized
ReplyDeleteFor the first time, we also developed a prototype method of post-treating the waste water collected from the systems of synthesizing and purifying graphene oxide.
ReplyDeleteNaNO3 and H2SO4 to form HNO3.
ReplyDeletewhat is conc per ml and per liter how can i prerpare 5mg/ml
ReplyDeletescience believe in references, kindly put the reference behind. its most important for researcher. as chemist if i prepare it with above method, what should be my reference. ? Regards
ReplyDeleteDear Visitor
ReplyDeleteSorry for the inconvenience you have encountered at InstaNANO.com
We can not provide the reference of all the synthesized materials posted on InstaNANO as most of the work is done in the personal laboratories by researchers and not published anywhere. First researchers synthesize the material in lab and then characterize it, only then we make post on the InstaNANO so we can not provide you the reference of our work.
There are some post also which have written only after reading many research papers by our team. But we try to avoid such post which are only written after reading papers (not synthesized in lab by us) because there are many cases when data is manipulated in papers. So for such post we can provide you the reference if you send us the post url query on asking the reference on info@instanano.com email address.
Hope you can understand the situation.
Thanks & Regards,
InstaNANO Team
What should be the percentage of H2O2?
ReplyDeleteWhat would be the mg/ml rate of this solution?
Thank you.
Pls, is it necessary to carry out the synthesis under reflux while heating at higher temperatures??
ReplyDeleteplz can u send ur steps to prepare graphene oxide
ReplyDeleteHello! I am an undergraduate student that plans to work on graphene materials. Can I just ask how much graphene oxide are you able to produce using this method? Thanks!
ReplyDeleteAbdalla, that would be 500mg for 100ml and/or 5gr for 1Lt.
ReplyDeleteGood evening can help me after the fifth stage when the graphite oxide is formed how laundry product process Yes use extruder Centre and walrashh, are freed from sediment chapter leaky either deposit is alkravin oxide and sell it what do I do thanks
ReplyDeleteJ'ai des difficultés sur l'établissement des équations chimiques pour chaque étape.
ReplyDeleteEst-ce quelqu'un peut m'aider en écrivant en détails toutes ces équations?
Il n'y a personne pouvant m'aider à écrire toutes les équations chimiques mises en jeu en détails?
ReplyDeleteEcrire les equations mises en jeu a chaque etape est complexe a cause du melange d'oxidants dans la reaction et on ne sait donc pas qui reagit vraiment. Voici 2 articles sur le mechanisme de formation du graphite oxide qui pourront t'aider a comprendre mieux.
DeleteDOI: 10.1039/C9TC03251G
Mechanism of Graphene Oxide Formation
I did the experiment today, but the moment I add hydrogen peroxide, the solution did not turn yellowish. Do I need to repeat the experiment?
ReplyDeleteit didnt work for me also, i will try again by today
DeleteDear Ali, we have performed this experiment hundreds of times in our laboratory and method works perfectly. Problem in your case may be the graphite you are using in the experiment (please try with another graphite powder) and please also check all the expire of all the chemicals used in this experiment. Second problem may be that you are not maintaining the temperature as mentioned in the experiment. Other than this everything should work perfectly sir.
ReplyDeleteWith Best Regards,
InstaNANO Team
thanks i increase the concentration of the sulfuric acid i was using
ReplyDeleteit is working