Njira Yopangira Graphene

1, njira yolanda makina
Njira yojambulira makina ndi njira yopezera zida zopyapyala za graphene pogwiritsa ntchito kukangana komanso kuyenda pakati pa zinthu ndi graphene. Njirayi ndiyosavuta kuyigwiritsa ntchito, ndipo graphene yomwe imapezeka nthawi zambiri imasunga mawonekedwe a kristalo. Mu 2004, asayansi awiri aku Britain adagwiritsa ntchito tepi yowonekera kuti achotse masanjidwe achilengedwe a graphite kuti apeze graphene, yomwe imadziwikanso kuti ndi njira yolanda. Njirayi idawonedwa ngati yopanda ntchito komanso yolephera kupanga zinthu zambiri.
M'zaka zaposachedwa, makampaniwa apanga kafukufuku wambiri komanso chitukuko munjira zopangira graphene. Pakadali pano, makampani angapo ku Xiamen, Guangdong ndi zigawo zina ndi mizinda agonjetsa njira yopangira zotsika mtengo za graphene, pogwiritsa ntchito makina kuti apange ma graphene ndi mtengo wotsika komanso wapamwamba kwambiri.

2. Njira ya Redox
Njira yochepetsera makutidwe ndi okosijeni ndiyo kugwiritsa ntchito graphite wachilengedwe pogwiritsa ntchito mankhwala a reagents monga sulfuric acid ndi nitric acid ndi ma oxidants monga potaziyamu permanganate ndi hydrogen peroxide, kuwonjezera mipata pakati pa zigawo za graphite, ndikuyika ma oxides pakati pa zigawo za graphite kukonzekera GraphiteOxide. Kenako, chojambuliracho chimatsukidwa ndi madzi, ndipo cholimba chotsukidwa chimauma kutentha pang'ono kuti chikonzekeretse ufa wa graphite oxide. Graphene oxide idakonzedwa ndikujambula graphite oxide powder poyerekeza khungu ndikukula kwakutentha. Pomaliza, graphene oxide idachepetsedwa ndi njira zamankhwala kuti mupeze graphene (RGO). Njirayi ndiyosavuta kuyigwiritsa ntchito, zokolola zochuluka, koma zotsika mtengo [13]. Njira yochepetsera okosijeni imagwiritsa ntchito zidulo zamphamvu monga sulfuric acid ndi nitric acid, zomwe ndizowopsa ndipo zimafuna madzi ambiri kuti ziyeretsedwe, zomwe zimabweretsa kuipitsa chilengedwe.

Graphene yokonzedwa ndi njira ya redox imakhala ndi magulu ambiri okhala ndi mpweya wabwino ndipo ndiosavuta kusintha. Komabe, pochepetsa graphene oxide, ndizovuta kuwongolera okosijeni wa graphene pambuyo pochepetsa, ndipo graphene oxide imachepetsedwa mosalekeza motsogozedwa ndi dzuwa, kutentha kwambiri m'galimoto ndi zinthu zina zakunja, kotero mtundu wa zinthu za graphene zopangidwa ndi redox njira nthawi zambiri zimakhala zosagwirizana kuchokera ku batch kupita ku batch, zomwe zimapangitsa kuti zikhale zovuta kuwongolera mtunduwo.
Pakadali pano, anthu ambiri amasokoneza malingaliro a graphite oxide, graphene oxide ndikuchepetsa graphene oxide. Graphite oxide ndi yofiirira ndipo ndi polima ya graphite ndi oxide. Graphene oxide ndi chinthu chomwe chimapezeka posula graphite oxide umodzi, wosanjikiza kawiri kapena oligo wosanjikiza, ndipo muli magulu ambiri okhala ndi mpweya, motero graphene oxide siyabwino ndipo imakhala yogwira ntchito, yomwe imapitiliza kuchepetsa ndi kutulutsa mpweya monga sulfure dioxide mukamagwiritsa ntchito, makamaka panthawi yotentha kwambiri. Chogulitsa pambuyo pochepetsa graphene oxide chitha kutchedwa graphene (yochepetsedwa ya graphene oxide).

3. (silicon carbide) SiC epitaxial njira
Njira ya SiC epitaxial ndikuchepetsa ma atomu a silicon kutali ndi zida ndikumanganso ma atomu a C omwe amadzipangira okha m'malo opumira kwambiri komanso malo otentha, motero kupeza graphene kutengera gawo la SiC. Graphene yabwino kwambiri imatha kupezeka ndi njirayi, koma njirayi imafunikira zida zapamwamba.


Post nthawi: Jan-25-2021