Indlela yeMveliso yeGraphene

1, indlela yokuhlubula oomatshini
Mechanical stripping method yindlela yokufumana imathiriyeli yegraphene thin-layer ngokusebenzisa ukukhuhlana kunye nentshukumo ehambelanayo phakathi kwezinto kunye negraphene. Indlela ilula ukuyisebenzisa, kwaye i-graphene efunyenweyo ihlala igcina i-crystal structure epheleleyo. Ngo-2004, izazinzulu ezimbini zaseBritane zasebenzisa iteyiphu ecacileyo ukuxobula umaleko wegraphite yendalo ngokomaleko ukuze bafumane igraphene, neyathi yahlelwa njengendlela yokuhluba ngoomatshini. Le ndlela yayikhe yabonwa njengengasebenziyo kwaye ayikwazi ukwenza imveliso ngobuninzi.
Kwiminyaka yakutshanje, ishishini lenze uphando oluninzi kunye nophuhliso kwiindlela zokuvelisa zegraphene. Okwangoku, iinkampani ezininzi e-Xiamen, e-Guangdong nakwamanye amaphondo kunye nezixeko zoyisile imveliso ye-graphene enexabiso eliphantsi, isebenzisa indlela yokuhluba oomatshini ukuvelisa igraphene ngexabiso eliphantsi kunye nomgangatho ophezulu.

2. Indlela ye-Redox
Indlela yokunciphisa i-oxidation ku-oxidize igraphite yendalo ngokusebenzisa ii-reagents zemichiza ezifana ne-asidi ye-sulfuric kunye ne-nitric acid kunye ne-oxidants ezifana ne-potassium permanganate kunye ne-hydrogen peroxide, ukwandisa isithuba phakathi kwe-graphite layers, kunye nokufaka ii-oxides phakathi kwe-graphite layers ukulungiselela i-GraphiteOxide. Emva koko, i-reactant ihlanjwe ngamanzi, kwaye i-soli ehlanjiweyo yomiswa kwiqondo lokushisa eliphantsi ukulungiselela i-graphite oxide powder. Igraphene oxide yalungiswa ngokuxobula igraphite oxide powder ngokuxobula ngokwasemzimbeni kunye nokwanda kobushushu obuphezulu. Ekugqibeleni, i-graphene oxide yancitshiswa yindlela yekhemikhali yokufumana igraphene (RGO). Le ndlela ilula ukusebenza, kunye nesivuno esiphezulu, kodwa umgangatho wemveliso ophantsi [13]. Indlela yokunciphisa i-oxidation isebenzisa i-acids eqinile njenge-asidi ye-sulfuric kunye ne-nitric acid, eyingozi kwaye idinga amanzi amaninzi okucoca, okuzisa ukungcola okukhulu kwendalo.

I-graphene elungiselelwe yindlela ye-redox iqulethe amaqela asebenzayo ane-oksijini etyebileyo kwaye kulula ukuyiguqula. Nangona kunjalo, xa unciphisa i-graphene oxide, kunzima ukulawula umxholo we-oxygen wegraphene emva kokunciphisa, kwaye i-graphene oxide iya kuncitshiswa ngokuqhubekayo phantsi kwefuthe lelanga, ubushushu obuphezulu kwinqwelo kunye nezinye izinto zangaphandle, ngoko umgangatho weemveliso zegraphene. eveliswa ngendlela ye-redox idla ngokungahambelani ukusuka kwibhetshi ukuya kwibhetshi, okwenza kube nzima ukulawula umgangatho.
Okwangoku, abantu abaninzi babhidanisa iikhonsepthi zegraphite oxide, igraphene oxide kunye nokunciphisa igraphene oxide. Igraphite oxide imdaka kwaye iyipolymer yegraphite kunye neoxide. I-graphene oxide yimveliso efunyenwe ngokuxobula i-graphite oxide kuluhlu olulodwa, i-double layer okanye i-oligo layer, kwaye iqulethe inani elikhulu lamaqela aqukethe i-oksijini, ngoko ke i-graphene oxide ayinayo i-conductive kwaye ineempawu ezisebenzayo, eziza kunciphisa ngokuqhubekayo. kunye nokukhulula iigesi ezifana ne-sulphur dioxide ngexesha lokusetyenziswa, ngakumbi ngexesha lokulungiswa kwezinto eziphezulu zokushisa. Imveliso emva kokunciphisa i-graphene oxide ingabizwa ngokuba yi-graphene (i-graphene oxide eyehlisiwe).

3. (i-silicon carbide) indlela ye-SiC epitaxial
Indlela ye-SiC epitaxial kukuthoba ii-athom ze-silicon kude nezixhobo kunye nokwakha ngokutsha ii-athom ze-C eziseleyo ngokuzihlanganisa kwi-vacuum ephezulu kakhulu kunye nemekobume yobushushu obuphezulu, ngaloo ndlela ifumana igraphene esekwe kwi-SiC substrate. Igraphene ekumgangatho ophezulu inokufumaneka ngale ndlela, kodwa le ndlela idinga izixhobo eziphezulu.