Phunzirani pa kaphatikizidwe ndi kusinthidwaCerium oxide nanomatadium
Kaphatikizidwe waceria nanomatadiumzikuphatikizapo mpweya, coprecipitation, hydrothermal, makina kaphatikizidwe, kuyaka kaphatikizidwe, sol gel osakaniza, micro lotion ndi pyrolysis, mwa zomwe kaphatikizidwe njira zazikulu ndi mpweya ndi hydrothermal. Njira ya Hydrothermal imatengedwa kuti ndi yosavuta, yotsika mtengo kwambiri, komanso njira yaulere yowonjezera. Vuto lalikulu la njira ya hydrothermal ndikuwongolera mawonekedwe a nanoscale, omwe amafunikira kusintha kosamalitsa kuwongolera mawonekedwe ake.
Kusintha kwaceriazitha kukulitsidwa kudzera mu njira zingapo: (1) doping ma ayoni ena achitsulo ndi mitengo yotsika kapena miyeso yaying'ono mu ceria lattice. Njirayi siyingangowonjezera magwiridwe antchito azitsulo zazitsulo zomwe zikukhudzidwa, komanso kupanga zida zatsopano zokhazikika zokhala ndi thupi ndi mankhwala atsopano. (2) kumwazikana ceria kapena ma analogue ake doped pa zipangizo zonyamulira zoyenera, monga adamulowetsa mpweya, graphene, etc.Cerium oxideitha kukhalanso ngati chonyamulira zobalalitsira zitsulo monga golide, platinamu, ndi palladium. Kusintha kwa zida za cerium dioxide makamaka kumagwiritsa ntchito zitsulo zosinthika, zitsulo zosowa za alkali/alkali lapansi, zitsulo zapadziko lapansi zomwe sizipezeka, ndi zitsulo zamtengo wapatali, zomwe zimakhala ndi ntchito yabwino komanso kukhazikika kwamafuta.
Kugwiritsa ntchito kwaCerium oxidendi Composite Catalysts
1, Kugwiritsa ntchito ma morphologies osiyanasiyana a ceria
Laura et al. lipoti la kutsimikiza kwa mitundu itatu ya ceria morphology gawo, zomwe zimagwirizana ndi zotsatira za ndende ya alkali ndi kutentha kwa hydrothermal mpaka kumapeto.CeO2nanostructure morphology. Zotsatira zikuwonetsa kuti ntchito yothandizirayi ikugwirizana mwachindunji ndi kuchuluka kwa Ce3+/Ce4+ ndi kuchuluka kwa ntchito ya oxygen. Wei et al. apanga atatu Pt/CeO2chothandizira chokhala ndi ma morphology osiyanasiyana onyamula (ndodo ngati (CeO2-R), kiyubiki (CeO2-C), ndi octahedral (CeO2-O), omwe ali oyenerera kwambiri kutentha kwa mpweya wochepa wa C2H4. Bian ndi al. adakonza zingapo zaCeO2 nanomatadiumndi mawonekedwe a ndodo, kiyubiki, granular, ndi octahedral morphology, ndipo adapeza kuti zothandizira zimadzazaCeO2 nanoparticles(5Ni/NPs) adawonetsa zochitika zapamwamba kwambiri komanso kukhazikika bwino kuposa zopangira ndi mitundu ina yaCeO2thandizo.
2.Catalytic kuwonongeka kwa zoipitsa m'madzi
Cerium oxidewakhala akudziwika ngati chothandizira ozoni oxidation chothandizira kuchotsa zinthu zosankhidwa za organic. Xiao ndi al. adapeza kuti Pt nanoparticles amalumikizana kwambiriCeO2pa chothandizira pamwamba ndi kukumana amphamvu kuchita, potero kusintha ozoni kuwola ntchito ndi kupanga zotakasika zamoyo mpweya mitundu, amene amathandiza kuti makutidwe ndi okosijeni wa toluene. Zhang Lanhe ndi ena adakonza dopedCeO2/Al2O3 zothandizira. Doped metal oxides amapereka malo ochitirapo kanthu pakati pa organic compounds ndi O3, zomwe zimapangitsa kuti pakhale ntchito yothandiza kwambiri.CeO2/ Al2O3 ndi kuwonjezeka kwa malo omwe akugwira ntchito pamtunda wothandizira
Choncho, maphunziro ambiri asonyeza zimenezocerium oxidezopangira gulu sangakhoze kokha kumapangitsanso kuwonongeka kwa recalcitrant organic yaying'ono zoipitsa m'munda wa chothandizira ozoni mankhwala a madzi oipa, komanso ndi zopinga zotsatira pa bromate opangidwa pa ndondomeko ozoni chothandizira. Iwo ali ndi mwayi wogwiritsa ntchito kwambiri pochiza madzi a ozoni.
3, Kuwonongeka kothandizira kwazinthu zosakhazikika za organic
CeO2, monga momwe amachitira osayidi yapadziko lapansi osowa, adaphunziridwa mu multiphase catalysis chifukwa cha kuchuluka kwake kosungirako okosijeni.
Wang ndi al. Anapanga Ce Mn composite oxide yokhala ndi morphology yooneka ngati ndodo (Ce/Mn molar ratio ya 3:7) pogwiritsa ntchito njira ya hydrothermal. Mn ions adalowetsedwa muCeO2chimango m'malo Ce, potero kuonjezera ndende ya mpweya ntchito. Pamene Ce4 + imasinthidwa ndi Mn ions, malo ochulukirapo a okosijeni amapangidwa, chomwe ndi chifukwa cha ntchito yake yapamwamba. Du et al. adapanga zida za Mn Ce oxide pogwiritsa ntchito njira yatsopano yophatikiza mpweya wa redox ndi njira za hydrothermal. Iwo anapeza kuti chiŵerengero cha manganese ndiceriumidathandizira kwambiri kupanga chothandizira ndipo idakhudza kwambiri magwiridwe ake komanso ntchito zake zothandizira.Ceriummu manganesecerium oxideimagwira ntchito yofunika kwambiri pakutulutsa kwa toluene, ndipo manganese awonetsedwa kuti amagwira ntchito yofunika kwambiri pakutulutsa toluene. Kugwirizana pakati pa manganese ndi cerium kumapangitsa kuti pakhale njira yothandizira.
4.Photocatalyst
Sun et al. adakonzekera bwino Ce Pr Fe-0 @ C pogwiritsa ntchito njira ya mpweya. Njira yeniyeni ndi yakuti kuchuluka kwa doping kwa Pr, Fe, ndi C kumagwira ntchito yofunika kwambiri pa photocatalytic. Kuwonetsa kuchuluka koyenera kwa Pr, Fe, ndi C muCeO2ikhoza kupititsa patsogolo mphamvu ya photocatalytic ya zitsanzo zomwe zapezedwa, chifukwa zimakhala ndi mphamvu zowonjezera zowonongeka, kuyamwa kowoneka bwino kwa kuwala kowoneka bwino, kupangika kwapamwamba kwa magulu a carbon, ndi mipata yambiri ya okosijeni. Kupititsa patsogolo ntchito ya photocatalytic yaCeO2-GO nanocomposites okonzedwa ndi Ganesan et al. zimatheka chifukwa cha kuwonjezereka kwa malo, kuyamwa mwamphamvu, bandgap yopapatiza, ndi zotsatira zazithunzi zapamtunda. Liu et al. anapeza kuti Ce/CoWO4 composite catalyst ndi photocatalyst yothandiza kwambiri komanso yotheka kugwiritsa ntchito. Petrovic et al. kukonzekeraCeO2zothandizira kugwiritsa ntchito nthawi zonse ma electrodeposition njira ndikuwasintha ndi mpweya wosatentha wa corona plasma. Zida zonse zosinthidwa za plasma komanso zosasinthidwa zimawonetsa luso lothandizira mu plasma ndi njira zowonongeka za photocatalytic.
Mapeto
Nkhaniyi ikufotokozanso chikoka cha kaphatikizidwe njira zacerium oxidepa tinthu morphology, udindo wa morphology pamwamba katundu ndi catalytic ntchito, komanso synergistic zotsatira ndi ntchito pakaticerium oxidendi dopants ndi zonyamulira. Ngakhale kuti cerium oxide based catalysts akhala akuphunziridwa kwambiri ndikugwiritsidwa ntchito m'munda wa catalysis, ndipo apita patsogolo kwambiri kuthetsa mavuto a chilengedwe monga kuyeretsa madzi, pali mavuto ambiri othandiza, monga osadziwika bwino.cerium oxidemorphology ndi kutsitsa makina a cerium othandizira othandizira. Kufufuza kwina kumafunika pa kaphatikizidwe kazinthu zothandizira, kukulitsa mphamvu ya synergistic pakati pa zigawo, ndikuphunzira njira yopangira katundu wosiyanasiyana.
Wolemba magazini
Shandong Ceramics 2023 Nkhani 2: 64-73
Olemba: Zhou Bin, Wang Peng, Meng Fanpeng, etc
Nthawi yotumiza: Nov-29-2023