Biphasic Cerium Oxide Nanoparticles: Kev Siv Ob Zaug Sib Koom Tes
Cov kev nce qib tsis ntev los no hauv nanotechnology tau coj mus rau hauv lub sijhawm tshiab ntawm cov ntaub ntawv nrog cov khoom tshwj xeeb, tshwj xeeb tshaj yog nyob rau hauv lub ntiaj teb ntawm kev khaws cia lub zog thiab cov khoom siv hluav taws xob. Ib qho kev tsim kho tshiab zoo kawg nkaus yog kev txhim kho ntawm biphasiccov nanoparticles cerium oxide, uas tau tshwm sim los ua cov khoom siv ob txoj haujlwm hauv dielectric thiab supercapacitor daim ntawv thov. Qhov kev tshawb pom no, tshawb nrhiav los ntawm Prakash et al., qhia txog lub peev xwm loj heev rau cerium oxide nanoparticles los hloov cov thev naus laus zis tam sim no, muab cov kev txhim kho uas tuaj yeem pab tau zoo rau ob qho kev siv hauv kev lag luam thiab cov neeg siv khoom.
Cerium oxide, ib yam khoom siv tau ntau yam uas paub txog nws lub peev xwm khaws cov pa oxygen thiab tus cwj pwm redox, tau txais kev saib xyuas hauv ntau qhov chaw. Nws cov nanoparticles, vim lawv qhov chaw siab rau qhov sib piv ntawm qhov ntim, qhia txog cov khoom zoo dua uas tseem ceeb rau cov ntawv thov siab heev. Kev tshawb fawb uas Prakash thiab cov npoj yaig ua tsis yog tsuas yog hais txog kev ua haujlwm thiab kev ua haujlwm ntawm cov nanoparticles no xwb tab sis kuj tseem ceeb rau lawv lub peev xwm ua ob lub luag haujlwm uas tuaj yeem ua tau ntau yam kev siv. Qhov kev ua haujlwm sib koom ua ke no tsocerium oxidecov nanoparticles nyob rau pem hauv ntej ntawm kev tsim kho tshiab tsim los daws qhov kev thov nce ntxiv rau cov kev daws teeb meem hluav taws xob zoo.
Txoj kev tshawb fawb no tau piav qhia txog cov tswv yim tsim los tsim cov biphasic cerium oxide nanoparticles. Cov kws tshawb fawb tau siv txoj kev hydrothermal rau cov txheej txheem tsim, uas tso cai rau kev tswj hwm qhov loj me thiab morphology ntawm cov khoom me me. Los ntawm kev kho ntau yam kev tsim khoom, lawv tau txais cov nanoparticles uas muaj ob qho tib si fluorite thiab monoclinic qauv. Qhov kev sib xyaw ua ke ntawm cov theem no yog qhov tseem ceeb vim nws txhim kho cov khoom siv hluav taws xob uas xav tau rau kev ua haujlwm zoo tshaj plaws hauv cov txheej txheem khaws cia hluav taws xob.
Cov txheej txheem piav qhia xws li X-ray diffraction (XRD) thiab transmission electron microscopy (TEM) tau siv dav los tshuaj xyuas cov nanoparticles synthesized. Cov txiaj ntsig XRD tau lees paub qhov muaj ob theem crystalline, thaum TEM visualization muab cov duab meej qhia txog qhov sib xws thiab kev tswj qhov loj ntawm cov nanoparticles. Cov txheej txheem no tsis yog tsuas yog lees paub cov txheej txheem synthesis tab sis kuj qhia txog cov yam ntxwv zoo ntawm cov khoom siv uas tuaj yeem ua rau muaj kev txhim kho tseem ceeb hauv kev ceev ntawm lub zog thiab kev coj ua.
Ib qho ntawm cov yam ntxwv zoo ntawm biphasic cerium oxide nanoparticles yog lawv cov khoom dielectric. Dielectrics ua lub luag haujlwm tseem ceeb hauv cov khoom siv hluav taws xob, cuam tshuam rau lawv cov peev xwm ua tau zoo, suav nrog kev khaws cia lub zog thiab kev xa xov tooj. Qhov xwm txheej biphasic ntawm cerium oxide pab txhawb kev txhim kho dielectric tas mus li thiab cov nqi poob tangent, ua rau lawv tsim nyog rau ntau yam kev siv hauv capacitors thiab lwm yam khoom siv hluav taws xob. Qhov kev txhim kho no yog qhov tseem ceeb rau cov khoom siv tiam tom ntej uas xav tau kev ua haujlwm zoo dua thiab cov yam ntxwv me dua.
Ntxiv mus, txoj kev tshawb fawb no tshawb nrhiav txog cov ntawv thov supercapacitor ntawm cerium oxide nanoparticles. Supercapacitors raug lees paub rau lawv lub peev xwm los xa cov hluav taws xob sai, feem ntau hauv cov ntawv thov uas xav tau kev them nqi sai thiab kev tawm mus. Kev koom ua ke ntawm biphasic cerium oxide nanoparticles hauv kev tsim supercapacitor tau pom cov txiaj ntsig zoo, txhim kho cov nqi capacitance thaum tswj kev ruaj khov ntawm lub voj voog zoo heev. Qhov no ua rau lawv yog tus neeg sib tw zoo rau kev daws teeb meem khaws cia hluav taws xob hauv tsheb fais fab thiab cov tshuab hluav taws xob rov ua dua tshiab.
Ib qho kev tshawb fawb nthuav yog hais txog kev ruaj khov ntawm ib puag ncig uas cuam tshuam nrog kev siv cov nanoparticles cerium oxide. Raws li kev lag luam nce ntxiv hais txog cov khoom siv zoo rau ib puag ncig, kev tsim thiab kev siv cerium oxide kuj sib haum nrog cov ntsiab cai ntawm tshuaj ntsuab. Kev siv cov khoom siv sib dua, tsis muaj tshuaj lom tuaj yeem ua rau cov khoom muaj kev nyab xeeb dua thiab txo qhov cuam tshuam ntawm ib puag ncig uas feem ntau cuam tshuam nrog cov thev naus laus zis capacitor ib txwm muaj.
Cov kev tshawb pom ntawm Prakash et al. pab txhawb rau cov ntaub ntawv uas twb muaj lawm, muab kev nkag siab dav dav txog seb biphasic cerium oxide nanoparticles ua haujlwm li cas. Los ntawm kev piav qhia lawv cov txheej txheem thiab cov ntawv thov muaj peev xwm los ntawm cov txheej txheem sim ua haujlwm hnyav, kev tshawb fawb npaj cov hauv paus rau kev kawm yav tom ntej. Cov haujlwm tseem ceeb no yog qhov tseem ceeb rau cov kws tshawb fawb kev lag luam thiab cov engineers uas lub hom phiaj xav tsim kho tshiab ntxiv hauv kev khaws cia lub zog thiab cov khoom siv hluav taws xob.
Hauv thaj chaw thev naus laus zis uas hloov zuj zus tas li, lub peev xwm los kho cov ntaub ntawv ntawm nanoscale muab ntau lub sijhawm rau kev tsim kho tshiab. Cov biphasic cerium oxide nanoparticles uas tau qhia tawm hauv kev tshawb fawb no yog ib qho pov thawj rau qhov nanotechnology tuaj yeem ua rau muaj kev hloov pauv tseem ceeb. Nrog kev tshawb fawb thiab kev txhim kho txuas ntxiv, peb yuav pom cov ntaub ntawv no tau koom ua ke rau hauv cov khoom siv niaj hnub, txhim kho lawv cov kev ua haujlwm thiab kev ua tau zoo.