Indlela yokuvelisa iGraphene

1, indlela yokuhluba ngoomatshini
Indlela yokuqhekeza oomatshini yindlela yokufumana i-graphene yomaleko omncinci ngokusebenzisa umlo kunye nokushukuma okuhambelana phakathi kwezinto kunye negraphene. Indlela ilula ukuyisebenzisa, kwaye i-graphene efunyenweyo ihlala igcina isakhiwo seekristal. Ngo-2004, izazinzulu ezimbini zase-Bhritane zasebenzisa iteyiphu engafihlisiyo ukucoca umaleko wendalo ngokufumana igraphene, ekwahlelwa njengendlela yokuhluba. Le ndlela ibikade ithathwa njengengasebenzi kakuhle kwaye ingakwazi ukwenza imveliso ngobuninzi.
Kwiminyaka yakutshanje, umzi mveliso wenze uphando kunye nophuhliso oluninzi kwiindlela zemveliso zegraphene. Okwangoku, iinkampani ezininzi eXiamen, Guangdong nakwamanye amaphondo nakwizixeko boyisile ukuveliswa kwebhotile yexabiso eliphantsi lokulungiselela i-graphene, kusetyenziswa indlela yokuhluba oomatshini ukuvelisa i-graphene ngexabiso eliphantsi kunye nomgangatho ophezulu.

2. Indlela yeRoxox
Indlela yokunciphisa i-oxidation yindlela yokwenza i-graphite yendalo ngokusebenzisa i-reagents ze-chemical ezifana ne-acid ye-sulfuric kunye ne-nitric acid kunye ne-oxidants ezifana ne-potassium permanganate kunye ne-hydrogen peroxide, ukwandisa isithuba phakathi kweengqimba ze-graphite, kunye nokufaka i-oxides phakathi kweengqimba ze-graphite ukulungiselela i-GraphiteOxide. Emva koko, i-reactant ihlanjwa ngamanzi, kwaye i-solid solid ehlanjiweyo iyomiswa kubushushu obuphantsi ukulungiselela i-graphite oxide powder. I-Graphene oxide yalungiswa ngokuxobuka umgubo we-graphite oxide powder ngokuxobuka ngokwasemzimbeni nangokwanda kobushushu obuphezulu. Okokugqibela, i-graphene oxide yancitshiswa yindlela yeekhemikhali yokufumana i-graphene (RGO). Le ndlela ilula ukuyisebenzisa, inemveliso ephezulu, kodwa ikumgangatho ophantsi wemveliso [13]. Indlela yokunciphisa i-oxidation isebenzisa ii-acids ezinamandla ezifana ne-acid ye-sulfuric kunye ne-nitric acid, eyingozi kwaye ifuna amanzi amaninzi okucoca, okuzisa ukungcola okukhulu kwendalo.

I-Graphene elungiselelwe yindlela ye-redox iqulethe amaqela asebenzayo aneoksijini kwaye kulula ukuyiguqula. Nangona kunjalo, xa kuncitshiswa i-graphene oxide, kunzima ukulawula umxholo weoksijini wegraphene emva kokuncitshiswa, kwaye i-graphene oxide iya kuncitshiswa ngokuqhubekayo phantsi kwempembelelo yelanga, iqondo lobushushu eliphezulu kwinqwelwana kunye nezinye izinto zangaphandle, ke umgangatho weemveliso zegraphene eveliswe yindlela ye-redox ihlala ingangqinelani ukusuka kwibhetshi ukuya kwibhetshi, eyenza kube nzima ukulawula umgangatho.
Okwangoku, uninzi lwabantu luphazamisa iikhonsepthi ze-graphite oxide, graphene oxide kunye nokunciphisa i-graphene oxide. I-graphite oxide ibrown kwaye yipolymer yegraphite kunye ne-oxide. I-Graphene oxide yimveliso efunyanwa ngokuxobuka i-graphite oxide ukuya kuluhlu olunye, umaleko ophindwe kabini okanye umaleko we-oligo, kwaye iqulethe inani elikhulu lamaqela aqukethe ioksijini, ke i-graphene oxide ayisebenzi kwaye ineempawu ezisebenzayo, eziya kuthi gqolo ukunciphisa kunye nokukhulula iigesi ezifana nesalfure dioxide ngexesha lokusetyenziswa, ngakumbi xa kusetyenzwa ngezinto ezinobushushu obuphezulu. Imveliso emva kokunciphisa i-graphene oxide inokubizwa ngokuba yi-graphene (ukunciphisa i-graphene oxide).

3. (i-silicon carbide) ye-SiC epitaxial indlela
Indlela ye-SiC ye-epitaxial kukunciphisa ii-atom ze-silicon kude nezinto kunye nokwakha ngokutsha ii-athomu ze-C ngokuzihlanganisela kwi-ultra-high vacuum kunye neqondo lokushisa eliphezulu, ngaloo ndlela ufumane i-graphene ngokusekelwe kwi-substrate ye-SiC. I-graphene ekumgangatho ophezulu inokufunyanwa ngale ndlela, kodwa le ndlela ifuna izixhobo eziphezulu.


Ixesha Post: Jan-25-2021