Ama-nanoparticles e-Biphasic Cerium Oxide: Ukusebenzisana Okubili Kokusetshenziswa
Intuthuko yakamuva kwezobuchwepheshe be-nano ilethe inkathi entsha yezinto ezinezici ezihlukile, ikakhulukazi emkhakheni wokugcina amandla kanye namadivayisi kagesi. Enye into entsha ephawulekayo ukuthuthukiswa kwe-biphasicizinhlayiya ezincane ze-cerium oxide, okuvele njengento enezinto ezimbili ezisebenzayo ekusetshenzisweni kwe-dielectric kanye ne-supercapacitor. Lokhu kuphumelela, okuhlolwe nguPrakash et al., kwembula amandla amakhulu e-cerium oxide nanoparticles okuguqula ubuchwepheshe bamanje, okunikeza ukuthuthukiswa okungazuzisa kakhulu kokubili izinhlelo zokusebenza zezimboni kanye nabathengi.
I-Cerium oxide, into eguquguqukayo eyaziwa ngomthamo wayo wokugcina umoya-mpilo kanye nokuziphatha kwe-redox, idonsele ukunaka emikhakheni eyahlukahlukene. Ama-nanoparticles ayo, ngenxa yesilinganiso sawo esiphezulu sendawo kuya kuvolumu, abonisa izakhiwo ezithuthukisiwe ezibalulekile ezinhlelweni ezithuthukisiwe. Ucwaningo olwenziwe nguPrakash nozakwabo alugcizeleli nje kuphela ukuguquguquka kwesakhiwo nokusebenza kwala ma-nanoparticles kodwa futhi namakhono awo anezindima ezimbili angahlangabezana nokusetshenziswa okubanzi. Lokhu kusebenza okusebenzisanayo kubekai-cerium oxideama-nanoparticles ahamba phambili ezintweni ezintsha ezenzelwe ukubhekana nesidingo esikhulayo sezixazululo zamandla ezisebenzayo.
Lolu cwaningo luchaza ngokucophelela amasu okwenziwa asetshenziswa ukukhiqiza ama-nanoparticles e-biphasic cerium oxide. Abacwaningi basebenzise indlela ye-hydrothermal yenqubo yokwenziwa, evumela ukulawula okunembile usayizi wezinhlayiya kanye nesimo sazo. Ngokulungisa amapharamitha ahlukahlukene okwenziwa, bathole ama-nanoparticles abonisa izakhiwo ze-fluorite kanye ne-monoclinic. Le nhlanganisela eyingqayizivele yezigaba ibalulekile njengoba ithuthukisa izakhiwo ze-elekthronikhi ezidingekayo ukuze kusebenze kahle ezinhlelweni zokugcina amandla.
Amasu okuhlaziya izici ezifana ne-X-ray diffraction (XRD) kanye ne-transmission electron microscopy (TEM) asetshenziswe kabanzi ukuhlaziya ama-nanoparticles ahlanganisiwe. Imiphumela ye-XRD iqinisekisile ukuba khona kwezigaba zombili zekristalu, kuyilapho ukubona ngeso lengqondo kwe-TEM kunikeze izithombe ezicacile ezibonisa ukufana kwama-nanoparticles kanye nokulawula usayizi. Lawa masu awagcini nje ngokuqinisekisa inqubo yokuhlanganisa kodwa futhi abonisa izici ezithembisayo zezinto ezingaholela ekuthuthukisweni okukhulu kobuningi bamandla kanye nokuqhuba.
Esinye sezici ezikhangayo ze-biphasic cerium oxide nanoparticles yizakhiwo zazo ze-dielectric. Ama-dielectric adlala indima ebalulekile kumadivayisi kagesi, ethonya amakhono awo okusebenza, okuhlanganisa ukugcinwa kwamandla kanye nokudluliswa kwesignali. Uhlobo lwe-biphasic lwe-cerium oxide lwenza kube lula ukuguquguquka kwe-dielectric kanye namanani e-tangent okulahlekelwayo, okwenza afaneleke kakhulu ekusetshenzisweni okuhlukahlukene kuma-capacitor nakwezinye izingxenye ze-elekthronikhi. Lokhu kuthuthukiswa kubalulekile kumadivayisi esizukulwane esilandelayo adinga ukusebenza kahle okuphezulu kanye nezici ezincane zefomu.
Ngaphezu kwalokho, lolu cwaningo luhlola ukusetshenziswa kwe-supercapacitor kwe-cerium oxide nanoparticles. Ama-Supercapacitors aqashelwa ngekhono lawo lokuletha ukuqhuma kwamandla okusheshayo, ikakhulukazi ekusetshenzisweni okudinga imijikelezo yokushaja okusheshayo nokukhipha. Ukufakwa kwe-biphasic cerium oxide nanoparticles ekwakhiweni kwe-supercapacitor kubonise imiphumela ethembisayo, kuthuthukisa amanani omthamo ngenkathi kugcinwa ukuzinza komjikelezo okuhle kakhulu. Lesi sici sibenza babe yisinqumo esinamandla sezixazululo zokugcina amandla ezimotweni zikagesi kanye nezinhlelo zamandla avuselelekayo.
Isici esithakazelisayo socwaningo siphathelene nokusimama kwemvelo okuhlobene nokusebenzisa izinhlayiya ezincane ze-cerium oxide. Njengoba izimboni zigcizelela kakhulu izinto ezinobungani nemvelo, ukwenziwa nokusetshenziswa kwe-cerium oxide kuhambisana nezimiso zamakhemikhali aluhlaza. Ukufakwa kwezinto ezilula, ezingenabo ubuthi kungabangela imikhiqizo ephephile futhi kunciphise umthelela wemvelo ovame ukuhlotshaniswa nobuchwepheshe bendabuko be-capacitor.
Okutholakele kukaPrakash nabanye kunegalelo elikhulu ezincwadini ezikhona, okunikeza ukuqonda okuphelele kokuthi ama-nanoparticles e-biphasic cerium oxide asebenza kanjani. Ngokuchaza izindlela zawo kanye nokusetshenziswa okungenzeka ngokusebenzisa amaphrothokholi okuhlola aqinile, ucwaningo lulungiselela isisekelo sezifundo zesikhathi esizayo. Umsebenzi onjalo oyisisekelo ubalulekile kubacwaningi bezimboni kanye nonjiniyela abahlose ukusungula izinto ezintsha emkhakheni wokugcina amandla kanye namadivayisi kagesi.
Esimweni sobuchwepheshe esishintsha njalo, ikhono lokulungisa izinto ezisetshenziswa ku-nanoscale linikeza amathuba amakhulu okusungula izinto ezintsha. Ama-nanoparticles e-biphasic cerium oxide ambulwe kulolu cwaningo awubufakazi bokuthi ubuchwepheshe be-nano bungaholela kanjani entuthukweni ebalulekile. Ngocwaningo oluqhubekayo kanye nentuthuko, singabona lezi zinto zihlanganiswa emikhiqizweni yansuku zonke, zithuthukisa ukusebenza kwazo kanye nezilinganiso zokusebenza.