Cov yeeb yaj kiab carbon xws li graphene yog cov khoom siv sib dua tab sis muaj zog heev nrog kev siv tau zoo heev, tab sis tej zaum yuav nyuaj rau tsim, feem ntau xav tau ntau tus neeg ua haujlwm thiab siv sijhawm ntau, thiab cov txheej txheem kim thiab tsis zoo rau ib puag ncig.
Nrog rau kev tsim cov graphene ntau heev, txhawm rau kov yeej qhov teeb meem uas ntsib hauv kev siv cov txheej txheem rho tawm tam sim no, cov kws tshawb fawb ntawm Ben Gurion University ntawm Negev hauv tebchaws Iziv tau tsim txoj kev rho tawm graphene "ntsuab" uas tuaj yeem siv rau ntau qhov chaw, suav nrog optics, electronics, ecology thiab biotechnology.
Cov kws tshawb nrhiav tau siv cov txheej txheem sib xyaw ua ke los rho tawm graphene los ntawm cov pob zeb hauv av ntuj tsim. Lawv pom tias cov pob zeb hypophyllite qhia tau tias muaj kev cia siab zoo hauv kev tsim cov graphene thiab cov tshuaj zoo li graphene hauv kev lag luam.
Cov pa roj carbon hauv hypomphibole yuav txawv. Raws li cov pa roj carbon, hypomphibole tuaj yeem muaj peev xwm siv sib txawv. Qee hom yuav siv tau rau lawv cov khoom catalytic, thaum lwm hom muaj cov khoom tua kab mob.
Cov yam ntxwv ntawm cov qauv ntawm hypopyroxene txiav txim siab lawv daim ntawv thov hauv cov txheej txheem oxidation-reduction, thiab nws kuj tseem siv tau rau kev tsim cov cua sov tawg thiab kev tsim cov hlau cam khwb cia (siab silicon) cam khwb cia.
Vim nws cov khoom siv lub cev thiab lub tshuab, qhov ceev ntawm cov khoom loj, lub zog zoo thiab kev tiv thaiv kev hnav, hypophyllite kuj muaj peev xwm nqus tau ntau yam khoom siv organic, yog li nws tuaj yeem siv ua cov khoom siv lim dej. Nws kuj tau ua pov thawj txog lub peev xwm tshem tawm cov khoom me me uas yuav ua rau cov dej tsis huv.
Cov hypopyroxene qhia tau tias muaj peev xwm tua kab mob thiab ntxuav dej ntawm cov kab mob me me, cov noob me me, cov kab mob me me thiab cov algae xiav-ntsuab. Vim nws muaj cov yam ntxwv catalytic thiab txo qis siab, magnesia feem ntau siv los ua cov khoom nqus dej rau kev kho cov dej khib nyiab.
(a) X13500 magnification thiab (b) X35000 magnification TEM duab ntawm cov qauv hypophyllite dispersed. (c) Raman spectrum ntawm cov hypophyllite kho thiab (d) XPS spectrum ntawm cov kab carbon hauv cov hypophyllite spectrum
Kev rho tawm graphene
Txhawm rau npaj cov pob zeb rau kev rho tawm graphene, ob leeg tau siv lub tshuab ntsuas hluav taws xob scanning (SEM) los tshuaj xyuas cov hlau hnyav tsis huv thiab porosity hauv cov qauv. Lawv kuj tau siv lwm txoj hauv kev kuaj mob los xyuas cov qauv dav dav thiab qhov muaj lwm yam minerals hauv hypophibole.
Tom qab kev tshuaj xyuas thiab npaj cov qauv tiav lawm, cov kws tshawb fawb tau rho tawm graphene los ntawm diorite tom qab ua cov qauv los ntawm Karelia siv lub tshuab ntxuav ultrasonic digital.
Vim tias siv txoj kev no ua tau ntau cov qauv kuaj, tsis muaj kev pheej hmoo ntawm kev ua qias tuaj ntxiv, thiab tsis tas yuav muaj cov txheej txheem ua cov qauv kuaj tom qab ntawd.
Vim tias cov yam ntxwv tshwj xeeb ntawm graphene tau paub dav hauv zej zog tshawb fawb dav dav, ntau txoj kev tsim khoom thiab kev sib xyaw ua ke tau tsim. Txawm li cas los xij, ntau txoj hauv kev no yog cov txheej txheem ntau kauj ruam lossis xav tau kev siv cov tshuaj lom neeg thiab cov neeg sawv cev oxidizing thiab txo qis muaj zog.
Txawm hais tias graphene thiab lwm cov yeeb yaj kiab carbon tau qhia txog kev siv tau zoo heev thiab tau ua tiav R&D zoo, cov txheej txheem siv cov ntaub ntawv no tseem tab tom tsim kho. Ib feem ntawm qhov kev sib tw yog ua kom graphene rho tawm pheej yig, uas txhais tau tias kev nrhiav cov thev naus laus zis dispersion zoo yog qhov tseem ceeb.
Txoj kev sib cais lossis kev tsim cov khoom no yog qhov nyuaj thiab tsis zoo rau ib puag ncig, thiab lub zog ntawm cov thev naus laus zis no kuj tseem tuaj yeem ua rau muaj qhov tsis zoo hauv graphene uas tsim tawm, yog li txo qhov zoo ntawm graphene.
Kev siv cov tshuaj ntxuav ultrasonic hauv kev tsim cov graphene tshem tawm cov kev pheej hmoo thiab cov nqi cuam tshuam nrog ntau kauj ruam thiab cov txheej txheem tshuaj lom neeg. Kev siv txoj kev no rau cov ntxhia ntuj hypophyllite tau ua rau txoj hauv kev tshiab rau kev tsim cov graphene uas zoo rau ib puag ncig.
Lub sijhawm tshaj tawm: Kaum Ib Hlis-04-2021
