Hanyar Samar da Graphene

1, Hanyar tsiri inji
Hanyar cire kayan inji hanya ce don samun kayan sikirin siraren graphene ta amfani da juzu'i da motsin dangi tsakanin abubuwa da graphene. Hanyar yana da sauƙi don aiki, kuma graphene da aka samu yawanci yana kiyaye cikakken tsarin crystal. A shekara ta 2004, wasu masana kimiya na Burtaniya guda biyu sun yi amfani da tef na zahiri don kwasar graphite Layer ta Layer don samun graphene, wanda kuma aka lasafta shi azaman hanyar cire kayan aikin injiniya. An taɓa ɗaukar wannan hanyar a matsayin mara inganci kuma ba ta iya samar da yawa.
A cikin 'yan shekarun nan, masana'antu sun yi bincike da yawa da haɓaka haɓakawa a cikin hanyoyin samar da graphene. A halin yanzu, kamfanoni da yawa a Xiamen, Guangdong da sauran larduna da birane sun shawo kan matsalar samar da graphene mai rahusa, ta yin amfani da hanyar tube na inji don samar da graphene mai rahusa da inganci.

2. Hanyar Redox
Hanyar rage Oxidation shine oxidize na halitta graphite ta amfani da sinadaran reagents kamar sulfuric acid da nitric acid da oxidants kamar potassium permanganate da hydrogen peroxide, ƙara tazara tsakanin graphite Layer, da kuma saka oxides tsakanin graphite yadudduka shirya GraphiteOxide. Sa'an nan, an wanke reactant da ruwa, da kuma wanke m da aka bushe a low zazzabi don shirya graphite oxide foda. Graphene oxide an shirya shi ta hanyar peeling graphite oxide foda ta hanyar kwasfa na jiki da haɓakar zafin jiki mai girma. A ƙarshe, graphene oxide an rage ta hanyar sinadarai don samun graphene (RGO). Wannan hanyar tana da sauƙi don aiki, tare da yawan amfanin ƙasa, amma ƙarancin ingancin samfur [13]. Hanyar rage oxidation yana amfani da acid mai karfi irin su sulfuric acid da nitric acid, wanda yake da haɗari kuma yana buƙatar ruwa mai yawa don tsaftacewa, wanda ke kawo babban gurɓataccen muhalli.

Graphene da aka shirya ta hanyar redox yana ƙunshe da ƙungiyoyin ayyuka masu ƙunshe da iskar oxygen kuma yana da sauƙin canzawa. Duk da haka, lokacin da rage graphene oxide, yana da wuya a sarrafa abun ciki na oxygen na graphene bayan raguwa, kuma graphene oxide za a ci gaba da rage a ƙarƙashin rinjayar rana, yawan zafin jiki a cikin karusar da sauran abubuwan waje, don haka ingancin samfurori na graphene. da aka samar ta hanyar redox sau da yawa ba daidai ba ne daga tsari zuwa tsari, wanda ya sa ya zama da wahala a sarrafa ingancin.
A halin yanzu, mutane da yawa suna rikita tunanin graphite oxide, graphene oxide da rage graphene oxide. Graphite oxide launin ruwan kasa kuma shi ne polymer na graphite da oxide. Graphene oxide wani samfur ne da aka samu ta hanyar kwasfa graphite oxide zuwa Layer guda, Layer biyu ko Layer oligo, kuma yana ƙunshe da adadi mai yawa na ƙungiyoyi masu ɗauke da iskar oxygen, don haka graphene oxide ba ya aiki kuma yana da kaddarorin aiki, wanda zai ci gaba da ragewa. da kuma saki iskar gas irin su sulfur dioxide yayin amfani, musamman a lokacin sarrafa kayan zafi mai zafi. Samfurin bayan rage graphene oxide ana iya kiransa graphene (rage graphene oxide).

3. (silicon carbide) Hanyar SiC epitaxial
Hanyar SiC epitaxial ita ce ƙaddamar da atom ɗin silicon nesa da kayan tare da sake gina sauran atom ɗin C ta hanyar haɗin kai a cikin matsanancin matsanancin yanayi da yanayin zafin jiki, don haka samun graphene bisa tushen SiC. Ana iya samun graphene mai inganci ta wannan hanyar, amma wannan hanyar tana buƙatar kayan aiki mafi girma.