1, usoro ịwepu igwe
Usoro ịwepu igwe bụ usoro iji nweta ihe ndị dị obere graphene site n'iji esemokwu na mmegharị n'etiti ihe na graphene. Usoro a dị mfe iji rụọ ọrụ, na graphene nwetara na-edobe usoro kristal zuru oke. N'afọ 2004, ndị ọkà mmụta sayensị Britain abụọ jiri teepu transperent wepụ oyi akwa graphite sitere na oyi akwa iji nweta graphene, nke a na-ekewakwa dị ka usoro ịwepụ ihe. A na-ewere usoro a dị ka nke na-adịghị mma na enweghị ike ịmepụta ọtụtụ ihe.
N'ime afọ ndị na-adịbeghị anya, ụlọ ọrụ ahụ emeela ọtụtụ nyocha na mmepe mmepe na ụzọ mmepụta nke graphene. Ka ọ dị ugbu a, ọtụtụ ụlọ ọrụ dị na Xiamen, Guangdong na ógbè na obodo ndị ọzọ emeriela mmepụta nke obere nkwadebe nke graphene dị ọnụ ala, na-eji usoro ịwepu igwe na-emepụta graphene na ọnụ ala dị elu.
2. Usoro Redox
Usoro mbelata oxidation bụ oxidize eke graphite site na iji kemịkalụ reagents dị ka sulfuric acid na nitric acid na oxidants dị ka potassium permanganate na hydrogen peroxide, mee ka ohere dị n'etiti graphite n'ígwé, na fanye oxides n'etiti graphite n'ígwé iji kwadebe GraphiteOxide. Mgbe ahụ, a na-eji mmiri na-asa ihe na-emeghachi omume, na ihe siri ike na-asacha na-akpọnwụ na obere okpomọkụ iji kwadebe ntụ ntụ graphite oxide. A kwadebere graphene oxide site na ịkpụcha ntụ ntụ graphite oxide site na peeling anụ ahụ yana mgbasawanye okpomọkụ. N'ikpeazụ, graphene oxide belatara site na usoro kemịkalụ iji nweta graphene (RGO). Usoro a dị mfe iji rụọ ọrụ, na-enwe nnukwu mkpụrụ, mana adịghị mma ngwaahịa [13]. Usoro mbelata oxidation na-eji acid siri ike dị ka sulfuric acid na nitric acid, nke dị ize ndụ ma na-achọ nnukwu mmiri maka ihicha, nke na-eweta oke mmetọ gburugburu ebe obibi.
Graphene nke a kwadebere site na usoro redox nwere otu ọrụ nwere ikuku oxygen ma dị mfe ịgbanwe. Otú ọ dị, mgbe ị na-ebelata graphene oxide, ọ na-esiri ike ịchịkwa ikuku oxygen nke graphene mgbe mbelata, na graphene oxide ga-anọgide na-ebelata n'okpuru mmetụta nke anyanwụ, elu okpomọkụ na ụgbọ ibu na ndị ọzọ na mpụga ihe, otú àgwà nke graphene ngwaahịa. nke a na-emepụta site na usoro redox na-adịkarịghị ekwekọ site na ogbe ruo na ogbe, nke na-eme ka o sie ike ịchịkwa àgwà.
Ka ọ dị ugbu a, ọtụtụ mmadụ na-agbagha echiche nke graphite oxide, graphene oxide na mbelata graphene oxide. Graphite oxide bụ agba aja aja ma bụrụ polymer nke graphite na oxide. Graphene oxide bụ ngwaahịa a na-enweta site na peeling graphite oxide na otu oyi akwa, okpukpu abụọ ma ọ bụ oligo oyi akwa, ma nwee ọnụ ọgụgụ buru ibu nke ikuku oxygen, ya mere graphene oxide adịghị arụ ọrụ ma nwee ihe ndị na-arụ ọrụ, nke ga-anọgide na-ebelata. ma hapụ gas dị ka sulfur dioxide n'oge eji eme ihe, karịsịa n'oge nhazi ihe onwunwe dị elu. Ngwaahịa mgbe ibelata graphene oxide nwere ike ịkpọ graphene (belata graphene oxide).
3. (silicon carbide) SiC epitaxial usoro
Usoro SiC epitaxial bụ iji mee ka atom silicon pụọ na ihe ma wughachi atom C fọdụrụnụ site na iji onwe ya na-ekpo ọkụ na ebe okpomọkụ dị elu, si otú ahụ nweta graphene dabere na mkpụrụ SiC. Enwere ike nweta graphene dị elu site na usoro a, mana usoro a chọrọ akụrụngwa dị elu.
Oge nzipu: Jan-25-2021