Synthesis uye kugadziriswa kwecerium oxide uye kushandiswa kwayo mu catalysis

Kudzidza pane synthesis uye kugadzirisaCerium oxide nanomaterials

The synthesis yeceria nanomaterialsinosanganisira kunaya kwemvura, kunyorovesa, hydrothermal, mechanical synthesis, combustion synthesis, sol gel, micro lotion uye pyrolysis, pakati payo nzira huru dzekugadzira mvura uye hydrothermal.Hydrothermal nzira inoonekwa seyakapusa, yakanyanya hupfumi, uye yekuwedzera yemahara nzira.Dambudziko guru re hydrothermal nzira ndeye kudzora nanoscale morphology, iyo inoda kunyatsogadziriswa kudzora maitiro ayo.

Kugadziriswa kweceriainogona kuvandudzwa kuburikidza nenzira dzinoverengeka: (1) doping mamwe maion simbi ane mitengo yakaderera kana saizi madiki muceria lattice.Iyi nzira haigoni kungovandudza kushanda kwesimbi oxides inobatanidzwa, asiwo inoumba zvinhu zvitsva zvakagadzikana zvine hutsva hwemuviri nemakemikari.(2) Kuparadzira ceria kana analogues ayo ane doped pane akakodzera anotakura zvinhu, senge activated kabhoni, graphene, nezvimwe.Cerium oxideinogona zvakare kushanda semutakuri wekuparadzira simbi segoridhe, platinamu, uye palladium.Kugadziridzwa kwecerium dioxide kwakavakirwa zvinhu kunonyanya kushandisa simbi yekuchinja, isingawanzo alkali/alkali pasi simbi, isingawanzo simbi dzepasi, uye simbi dzinokosha, dzine basa riri nani uye kugadzikana kwekupisa.

Kushandiswa kweCerium oxideuye Composite Catalysts

1,Kushandiswa kwemamorphology akasiyana eceria

Laura et al.yakashuma kugadzwa kwemhando nhatu dzeceria morphology phase diagrams, iyo inoenderana nemhedzisiro yealkali concentration uye hydrothermal kurapwa tembiricha kusvika yekupedzisira.CeO2nanostructure morphology.Mhedzisiro yacho inoratidza kuti iyo catalytic chiitiko chakanangana neiyo Ce3+/Ce4+ ratio uye pamusoro peiyo oxygen vacancy concentration.Wei et al.yakasanganiswa matatu Pt/CeO2catalysts ane akasiyana anotakura morphologies (tsvimbo senge (CeO2-R), cubic (CeO2-C), uye octahedral (CeO2-O), iyo inonyanya kukodzera kune yakaderera-tembiricha catalytic oxidation yeC2H4.Bian et al.vakagadzirira nhevedzano yeCeO2 nanomatadiumine shamhu-yakaita shamhu, cubic, granular, uye octahedral morphology, uye yakaona kuti zvinokonzeresa zvakatakurwaCeO2 nanoparticles(5Ni/NPs) yakaratidza basa repamusoro rinokurudzira uye kugadzikana kuri nani pane zvinokonzeresa nemamwe marudzi eCeO2rutsigiro.

2.Catalytic degradation yezvinosvibisa mumvura

Cerium oxideyave ichizivikanwa seanoshanda ozone oxidation catalyst yekubvisa yakasarudzwa organic komisheni.Xiao et al.akawana kuti Pt nanoparticles iri pedyo nepedyoCeO2pamusoro peiyo catalyst uye inopindirana kwakasimba, nekudaro inovandudza iyo ozone decomposition chiitiko uye ichigadzira yakawanda reactive okisijeni marudzi, ayo anobatsira kune oxidation ye toluene.Zhang Lanhe nevamwe vakagadzirira dopedCeO2/Al2O3 zvinokonzeresa.Doped metal oxides inopa nzvimbo yekuita yekuita pakati peorganic compounds neO3, zvichikonzera kushanda kwepamusoroCeO2/ Al2O3 uye kuwedzera kwemasaiti anoshanda pane inokonzeresa nzvimbo

Nokudaro, zvidzidzo zvakawanda zvakaratidza izvozvocerium oxidecomposite catalysts haingogone kuwedzera kushatiswa kwe recalcitrant organic micro pollutants mumunda we catalytic ozone kurapwa kwetsvina, asiwo ine inhibitory mhedzisiro pabromate inogadzirwa panguva ye ozone catalytic process.Ivo vane tarisiro yakakura yekushandisa mukurapa kweozone mvura.

3, Kushatisa kweCatalytic kweanoshanduka organic komisheni

CeO2, seyakajairwa pasi oxide isingawanzo, yakadzidzwa mu multiphase catalysis nekuda kwekuwanda kwayo kweokisijeni yekuchengetedza.

Wang et al.yakagadzira Ce Mn composite oxide ine morphology yakaumbwa netsvimbo (Ce/Mn molar ratio ye3:7) vachishandisa nzira yehydrothermal.Mn ions akaiswa mukatiCeO2chimiro chekutsiva Ce, nekudaro ichiwedzera kuwanda kweokisijeni vacancies.Sezvo Ce4 + inotsiviwa neMn ions, nzvimbo dzakawanda dzeokisijeni dzinoumbwa, ndicho chikonzero chekuita kwayo kwepamusoro.Du et al.synthesized Mn Ce oxide catalysts uchishandisa nzira nyowani inosanganisa redox kunaya uye nzira dzehydrothermal.Vakaona kuti ratio yemanganese uyeceriumyakaita basa rakakosha mukugadzira iyo catalyst uye yakakanganisa zvakanyanya kuita kwayo uye kuita kwayo.Ceriummune manganesecerium oxideinoita basa rakakosha mukushambadza kwe toluene, uye manganese yakaratidzwa kuita basa rakakosha mukuokisisa kwe toluene.Kubatana pakati pemanganese necerium kunovandudza catalytic reaction process.

4.Photocatalyst

Zuva et al.kugadzirira zvakabudirira Ce Pr Fe-0 @ C uchishandisa nzira yekunaya kwemvura.Iyo chaiyo nzira ndeyekuti doping huwandu hwePr, Fe, uye C hunoita basa rakakosha mukuita photocatalytic.Kuunza huwandu hwakakodzera hwePr, Fe, uye C muCeO2inogona kuvandudza zvakanyanya mashandiro ephotocatalytic yesample yakawanikwa, nekuti ine zvirinani adsorption yezvinosvibisa, kunyura kunoshanda kwechiedza chinooneka, yakakwirira kuumbwa kwekabhoni mabhendi, uye yakawanda nzvimbo dzeokisijeni.Iyo yakagadziridzwa photocatalytic chiitiko cheCeO2-GO nanocomposites yakagadzirwa naGanesan et al.inofungidzirwa kune yakakwidziridzwa nzvimbo, kunyura zvakanyanya, nhete bhendi, uye pamusoro pefotoresponse mhedzisiro.Liu et al.akawana kuti Ce/CoWO4 composite catalyst inonyatso shanda photocatalyst ine inogona kushandiswa kukosha.Petrovic et al.yakagadzirirwaCeO2ma catalysts anoshandisa anogara aripo e electrodeposition nzira uye akaagadzirisa neasina kupisa atmospheric pressure pulsating corona plasma.Zvese zviri zviviri plasma yakagadziridzwa uye isina kugadziridzwa zvinhu zvinoratidza yakanaka catalytic kugona mune ese plasma uye photocatalytic degradation maitiro.

Mhedziso

Ichi chinyorwa chinoongorora maitiro ekubatanidza nzira dzecerium oxidepa particle morphology, basa re morphology pamusoro pezvivakwa uye catalytic chiitiko, pamwe neiyo synergistic mhedzisiro uye kushandiswa pakaticerium oxideuye dopants uye vatakuri.Kunyange zvazvo cerium oxide based catalysts yakadzidzwa zvakanyanya uye yakashandiswa mumunda we catalysis, uye yakafambira mberi zvakanyanya mukugadzirisa matambudziko ezvakatipoteredza akadai sekurapwa kwemvura, kuchine matambudziko akawanda anoshanda, akadai seasina kujeka.cerium oxidemorphology uye kurodha michina yecerium inotsigirwa zvinokonzeresa.Kumwe kutsvagurudza kunodiwa panzira yekubatanidza yezvinokonzeresa, kuwedzera synergistic mhedzisiro pakati pezvikamu, uye kudzidza iyo inokonzeresa magadzirirwo emitoro yakasiyana.

Journal munyori

Shandong Ceramics 2023 Nyaya 2: 64-73

Vanyori: Zhou Bin, Wang Peng, Meng Fanpeng, nezvimwe