Njira Yopangira Graphene

1, njira yochotsera makina
Mechanical stripping method ndi njira yopezera graphene woonda wosanjikiza zipangizo pogwiritsa ntchito mikangano ndi kuyenda wachibale pakati pa zinthu ndi graphene. Njirayi ndiyosavuta kugwiritsa ntchito, ndipo graphene yomwe idapezeka nthawi zambiri imasunga mawonekedwe a kristalo wathunthu. Mu 2004, asayansi awiri aku Britain adagwiritsa ntchito tepi yowonekera kuti achotse wosanjikiza wachilengedwe wa graphite ndi wosanjikiza kuti apeze graphene, yomwe idatchulidwanso ngati njira yovulira. Njirayi poyamba inkaonedwa kuti ndi yosagwira ntchito komanso yosatha kupanga zambiri.
M'zaka zaposachedwa, makampaniwa apanga kafukufuku wambiri ndi chitukuko mu njira zopangira graphene. Pakali pano, makampani angapo ku Xiamen, Guangdong ndi zigawo zina ndi mizinda agonjetsa kupanga botolo la mtengo wotsika mtengo wokonzekera wa graphene, pogwiritsa ntchito njira yochotsera makina kuti apange graphene yotsika mtengo komanso yapamwamba.

2. Njira ya Redox
Kuchepetsa makutidwe ndi okosijeni njira ndi oxidize masoka graphite ntchito reagents mankhwala monga asidi sulfuric ndi asidi nitric ndi okosijeni monga potaziyamu permanganate ndi hydrogen peroxide, kuonjezera katayanitsidwe pakati graphite zigawo, ndi kuika oxides pakati graphite zigawo kukonzekera GraphiteOxide. Kenako, reactant ndi osambitsidwa ndi madzi, ndi olimba otsukidwa zouma pa kutentha otsika kukonzekera graphite okusayidi ufa. Graphene oxide idakonzedwa ndi kusenda ufa wa graphite oxide ndi kusenda thupi komanso kutentha kwakukulu. Pomaliza, graphene okusayidi anachepetsedwa ndi mankhwala njira kupeza graphene (RGO). Njirayi ndi yosavuta kugwiritsa ntchito, yokolola kwambiri, koma khalidwe lochepa la mankhwala [13]. Njira yochepetsera okosijeni imagwiritsa ntchito zidulo zamphamvu monga sulfuric acid ndi nitric acid, zomwe ndi zowopsa komanso zimafuna madzi ambiri oyeretsera, zomwe zimabweretsa kuwonongeka kwakukulu kwa chilengedwe.

Graphene yokonzedwa ndi njira ya redox ili ndi magulu ogwira ntchito okhala ndi okosijeni wambiri ndipo ndiyosavuta kusintha. Komabe, pamene kuchepetsa graphene okusayidi, n'zovuta kulamulira mpweya zili graphene pambuyo kuchepetsa, ndi graphene okusayidi adzakhala mosalekeza kuchepetsedwa mchikakamizo cha dzuwa, kutentha kwambiri mu ngolo ndi zinthu zina zakunja, kotero khalidwe la mankhwala graphene. opangidwa ndi njira ya redox nthawi zambiri amakhala osagwirizana kuchokera pagulu kupita pagulu, zomwe zimapangitsa kuti zikhale zovuta kuwongolera khalidwe.
Pakali pano, anthu ambiri kusokoneza mfundo za graphite okusayidi, graphene okusayidi ndi kuchepetsa graphene okusayidi. Graphite oxide ndi bulauni ndipo ndi polima wa graphite ndi okusayidi. Graphene oxide ndi chinthu chopezedwa ndi peeling graphite oxide kukhala wosanjikiza umodzi, wosanjikiza wapawiri kapena oligo wosanjikiza, ndipo chimakhala ndi magulu ambiri okhala ndi okosijeni, kotero kuti graphene oxide si conductive ndipo imakhala ndi zinthu zogwira ntchito, zomwe zimachepetsa nthawi zonse. ndi kutulutsa mpweya monga sulfure dioxide pakagwiritsidwa ntchito, makamaka panthawi yokonza zinthu zotentha kwambiri. The mankhwala pambuyo kuchepetsa graphene okusayidi angatchedwe graphene (anachepetsedwa graphene okusayidi).

3. (silicon carbide) SiC epitaxial njira
SiC epitaxial njira ndi sublimate pakachitsulo maatomu kutali zipangizo ndi kumanganso otsala C maatomu ndi kudzikonda gulu mu kopitilira muyeso vacuum ndi kutentha kwambiri chilengedwe, motero kupeza graphene zochokera SiC gawo lapansi. Ma graphene apamwamba amatha kupezeka ndi njirayi, koma njirayi imafuna zida zapamwamba.