1, tikanga tihorea miihini
Ko te tikanga tihorea miihini he tikanga ki te tiki rauemi papa angiangi o te graphene ma te whakamahi i te waku me te nekehanga whanaungatanga i waenga i nga mea me te kauwhata. He ngawari te whakahaere, a ko te graphene i whiwhi i te nuinga o te waa ka pupuri i te hanganga karaihe oti. I te tau 2004, e rua nga kaiputaiao o Ingarangi i whakamahi i te riipene maramara hei tihore i te paparanga kauwhata maaori ma ia paparanga kia whiwhi graphene, i whakarōpūtia hoki hei tikanga tihorea miihini. Ko tenei tikanga i whakaarohia he koretake me te kore e kaha ki te whakaputa papatipu.
I nga tau tata nei, he maha nga mahi rangahau me te whanaketanga o te umanga i roto i nga tikanga whakaputa graphene. I tenei wa, he maha nga kamupene i Xiamen, Guangdong me etahi atu kawanatanga me nga taone kua hinga i te hangahanga pounamu o te utu nui-nui te whakarite o te graphene, ma te whakamahi i te tikanga tarai miihini ki te whakaputa i te graphene me te utu iti me te kounga teitei.
2. Tikanga Redox
Ko te tikanga whakaheke o te hauhautanga ko te whakapouri i te kauwhata maori ma te whakamahi i nga tauhohe matū penei i te waikawa pungatara me te waikawa nitric me nga waikura penei i te pāhare pāporo me te hauwai peroxide, te whakanui ake i te mokowhiti i waenga i nga paparanga kauwhata, me te whakauru waikura ki waenga i nga paparanga kauwhata hei whakarite i te GraphiteOxide. Na, ka horoia te tauhohenga ki te wai, ka whakamarokehia te totoka i horoia ki te iti o te pāmahana hei whakarite i te paura waikura kauwhata. I whakaritea te graphene oxide na roto i te tihorea o te graphite oxide paura ma te tihorenga tinana me te roha o te pāmahana teitei. Ka mutu, ka whakahekehia te graphene oxide e te tikanga matū kia whiwhi graphene (RGO). He ngawari tenei tikanga ki te whakahaere, he nui te hua, engari he iti te kounga o te hua [13]. Ko te tikanga whakaheke o te waiora e whakamahi ana i nga waikawa kaha penei i te waikawa sulfuric me te waikawa nitric, he mea kino, me te nui o te wai mo te horoi, e kawe mai ana i te parahanga taiao.
Ko te Graphene i mahia ma te tikanga redox kei roto i nga roopu mahi whai hāora, he ngawari ki te whakarereke. Engari, i te wa e whakahekehia ana te graphene oxide, he uaua ki te whakahaere i te ihirangi hāora o te graphene i muri i te whakahekenga, ka heke tonu te graphene oxide i raro i te awe o te ra, te wera nui i roto i te waka me etahi atu mea o waho, na te kounga o nga hua o te graphene. ka puta mai i te tikanga redox he rerekee mai i te puranga ki te puranga, he uaua ki te whakahaere i te kounga.
I tenei wa, he maha nga tangata e whakararuraru ana i nga ariā o te waikura kauwhata, te waikura graphene me te waikura kauwhata whakaheke. He parauri te waikura kauwhata, he waerau o te kauwhata me te waikura. Ko te graphene oxide he hua ka riro mai i te tihorea o te graphite oxide ki te paparanga kotahi, ki te paparanga rua, ki te paparanga oligo ranei, a he maha nga roopu e mau ana i te hāora, na reira he kore-conductive te graphene oxide, he mea kaha, ka heke tonu. me te tuku hau penei i te sulfur dioxide i te wa e whakamahia ana, ina koa i te wa e tukatuka ana i nga rawa teitei. Ko te hua i muri i te whakaiti i te graphene oxide ka taea te kii ko te graphene (whakaheke graphene oxide).
3. (silicon carbide) SiC tikanga epitaxial
Ko te tikanga epitaxial SiC ko te whakaheke i nga ngota silicon mai i nga rawa me te hanga ano i nga toenga C ngota ma te whakahiato-whaiaro i roto i te korehau ultra-tiketike me te taiao pāmahana teitei, na reira ka whiwhi graphene i runga i te taputapu SiC. Ka taea te whiwhi graphene-kounga teitei ma tenei tikanga, engari me whai taputapu teitei ake tenei tikanga.
Wā tuku: Hānuere-25-2021