Mokhoa oa Tlhahiso ea Graphene

1, mokhoa oa ho hlobolisa oa mochini
Mokhoa oa ho hlobolisa mechini ke mokhoa oa ho fumana graphene lisebelisoa tse tšesaane ka ho sebelisa khohlano le motsamao o lekanyelitsoeng lipakeng tsa lintho le graphene. Mokhoa ona o bonolo ho o sebetsa, 'me graphene e fumanoeng hangata e boloka sebopeho se felletseng sa kristale. Ka 2004, bo-rasaense ba babeli ba Borithane ba ile ba sebelisa theipi e bonaletsang ho hlakola lera la graphite ka tatellano ho fumana graphene, eo le eona e neng e khethiloe e le mokhoa oa ho hlobolisa oa mochini. Mokhoa ona o kile oa nkuoa o sa sebetse hantle ebile o sa khone ho hlahisa bongata.
Lilemong tsa morao tjena, indasteri e entse lipatlisiso le nts'etsopele e ngata mekhoeng ea tlhahiso ea graphene. Hajoale, lik'hamphani tse 'maloa tsa Xiamen, Guangdong le liprofinse tse ling le litoropo li hapile bothata ba tlhahiso ea litheko tse theko e tlase tsa graphene, ba sebelisa mokhoa oa ho hlobolisa mechini ho hlahisa graphene ka theko e tlase le boleng bo holimo.

2. Mokhoa oa Redox
Mokhoa oa phokotso ea oxidation ke ho kopanya graphite ea tlhaho ka ho sebelisa li-reagents tsa lik'hemik'hale tse kang sulfuric acid le nitric acid le li-oxidants tse kang potassium permanganate le hydrogen peroxide, ho eketsa karohano lipakeng tsa likarolo tsa graphite, le ho kenya li-oxide lipakeng tsa likarolo tsa graphite ho lokisa GraphiteOxide. Ebe, mochini o hlatsoang ka metsi o hlatsuoa, 'me tiiso e tiisitsoeng e omisitsoe ka mocheso o tlase ho lokisa phofo ea graphite oxide. Graphene oxide e ne e lokisitsoe ka ho ebola phofo ea graphite oxide ka ho ebola le ho holisa mocheso o phahameng. Qetellong, graphene oxide e ile ea fokotsoa ka mokhoa oa lik'hemik'hale ho fumana graphene (RGO). Mokhoa ona o bonolo ho o sebetsa, ka chai e ngata, empa boleng ba sehlahisoa se tlase [13]. Mokhoa oa phokotso ea oxidation o sebelisa li-acid tse matla tse kang sulfuric acid le nitric acid, e leng kotsi ebile e hloka metsi a mangata ho e hloekisa, e tlisang tšilafalo e kholo ea tikoloho.

Graphene e hlophisitsoeng ke mokhoa oa redox e na le lihlopha tse sebetsang tse nang le oksijene tse ngata ebile ho bonolo ho e fetola. Leha ho le joalo, ha ho fokotsoa graphene oxide, ho thata ho laola likahare tsa oksijene tsa graphene kamora ho fokotseha, 'me graphene oxide e tla fokotsoa khafetsa tlasa tšusumetso ea letsatsi, mocheso o phahameng ka koloing le lintho tse ling tse kantle, ka hona boleng ba lihlahisoa tsa graphene e hlahisoang ke mokhoa oa redox hangata ha e lumellane ho tloha ho betch ho ea ho betch, e etsang hore ho be thata ho laola boleng.
Hajoale, batho ba bangata ba ferekanya likhopolo tsa graphite oxide, graphene oxide le ho fokotsa graphene oxide. Graphite oxide e sootho ebile ke polymer ea graphite le oxide. Graphene oxide ke sehlahisoa se fumanoang ka ho ebola graphite oxide ho ea lera le le leng, mokato o habeli kapa lera la oligo, mme e na le palo e kholo ea lihlopha tse nang le oksijene, ka hona graphene oxide ha e sebetse ebile e na le thepa e sebetsang, e tla lula e fokotsa le ho lokolla likhase tse kang sebabole dioxide nakong ea ts'ebeliso, haholo nakong ea ts'ebetso ea mocheso o phahameng. Sehlahisoa kamora ho fokotsa graphene oxide se ka bitsoa graphene (e fokotsoe ea graphene oxide).

3. (silicon carbide) mokhoa oa SiC epitaxial
Mokhoa oa epitaxial oa SiC ke ho fokotsa liathomo tsa silicon hole le lisebelisoa le ho aha bocha liathomo tsa C ka ho itlhahisa ka moea o phahameng haholo le mocheso o phahameng, ka hona o fumana graphene e ipapisitse le substrate ea SiC. Graphene ea boleng bo holimo e ka fumaneha ka mokhoa ona, empa mokhoa ona o hloka lisebelisoa tse phahameng.


Nako ea poso: Jan-25-2021