Joaloka li-sensor tsa khase tse tiileng, nano metal oxide semiconductor gas sensors li sebelisoa haholo tlhahiso ea indasteri, tlhokomelo ea tikoloho, tlhokomelo ea bophelo bo botle le likarolo tse ling bakeng sa kutloisiso ea tsona e phahameng, theko e tlaase ea tlhahiso le tekanyo e bonolo ea matšoao.Hajoale, lipatlisiso mabapi le ntlafatso ea thepa e utloang khase ea nano metal oxide sensing e shebana haholo le nts'etsopele ea nanoscale metal oxides, joalo ka nanostructure le doping modification.

Nano metal oxide semiconductor sensing materials haholo-holo SnO2, ZnO, Fe2O3, VO2, In2O3, WO3, TiO2, joalo-joalo. Likarolo tsa kutlo e ntse e le lisebelisoa tsa khase tse hanyetsang ka ho fetisisa tse sebelisoang ka ho fetisisa, li-non-resissive gase sensors le tsona li ntse li ntlafatsoa ka potlako.

Hajoale, tataiso ea mantlha ea lipatlisiso ke ho lokisa li-nanomaterials tse nang le sebaka se seholo se ikhethileng, joalo ka li-nanotubes, li-nanorod arrays, li-membrane tsa nanoporous, joalo-joalo, ho eketsa bokhoni ba khase ea adsorption le sekhahla sa phallo ea khase, ka hona ho ntlafatsa kutloisiso le lebelo la karabo. ho khase ea thepa.The elemental doping ea metal oxide, kapa kaho ea sisteme ea nanocomposite, dopant e hlahisitsoeng kapa likarolo tse kopaneng li ka bapala karolo ea matla, hape e ka ba sesebelisoa se thusang ho aha nanostructure, ka hona, ho ntlafatsa ts'ebetso ea kutlo ea khase ka kakaretso. lisebelisoa.

1. Lisebelisoa tsa ho lemoha khase tse sebelisitsoeng Nano Tin Oxide(SnO2)

Tin oxide (SnO2) ke mofuta oa thepa e sa utloeng letho ka khase.E na le kutlo e ntle ho likhase tse kang ethanol, H2S le CO. Boikutlo ba eona ba khase bo itšetlehile ka boholo ba likaroloana le sebaka se itseng sa holimo.Ho laola boholo ba SnO2 nanopowder ke senotlolo sa ho ntlafatsa kutloisiso ea khase.

Ho ipapisitsoe le mesoporous le macroporous nano tin oxide powders, bafuputsi ba lokiselitse li-sensor tsa lifilimi tse teteaneng tse nang le ts'ebetso e phahameng ea matla bakeng sa CO oxidation, e bolelang ts'ebetso e phahameng ea ho utloa khase.Ho phaella moo, mohaho oa nanoporous o fetohile sebaka se chesang ha ho etsoa thepa ea ho lemoha khase ka lebaka la SSA ea eona e kholo, phallo ea khase e ngata le mechine e fetisang batho ka bongata.

2. Lisebelisoa tsa ho lemoha khase tse sebelisitsoeng Nano Iron Oxide(Fe2O3)

Iron oxide (Fe2O3)e na le mefuta e 'meli ea kristale: alpha le gamma, tseo ka bobeli li ka sebelisoang e le lisebelisoa tse utloang khase, empa thepa ea tsona ea ho utloa khase e na le phapang e kholo.α-Fe2O3 ke ea sebopeho sa corundum, eo thepa ea eona ea 'mele e tsitsitseng.Mochine oa eona oa ho utloa khase o laoloa holimo, 'me kutloisiso ea eona e tlase.γ-Fe2O3 ke ea sebopeho sa spinel 'me e na le metastable.Mochine oa eona oa ho lemoha khase ke haholo-holo taolo ea ho hanyetsa 'mele.E na le kutlo e ntle empa e sa tsitsa, 'me e bonolo ho fetoha ho α-Fe2O3 le ho fokotsa kutloisiso ea khase.

Lipatlisiso tsa morao-rao li tsepamisitse maikutlo ho ntlafatsa maemo a ho kopanya ho laola morphology ea Fe2O3 nanoparticles, 'me joale ho hlahloba lisebelisoa tse loketseng tsa khase, tse kang α-Fe2O3 nanobeams, porous α-Fe2O3 nanorods, monodisperse α-Fe2O3 nanostructures, mesopores α-Fe2O3 li-nanomaterials, joalo-joalo.

3. Lisebelisoa tsa ho lemoha khase tse sebelisitsoeng Nano Zinc Oxide(ZnO)
Zinc oxide (ZnO)ke ntho e tloaelehileng e laoloang holim'a khase e sa utloeng bohloko.Sensor ea khase e thehiloeng ho ZnO e na le mocheso o phahameng oa ts'ebetso le khetho e fosahetseng, e etsang hore e sebelisoe haholo ho feta SnO2 le Fe2O3 nanopowders.Ka hona, ho lokisoa ha sebopeho se secha sa li-nanomaterials tsa ZnO, phetoho ea doping ea nano-ZnO ho fokotsa mocheso oa ts'ebetso le ho ntlafatsa khetho ke sepheo sa lipatlisiso ka thepa ea ho utloa khase ea nano ZnO.

Hajoale, nts'etsopele ea karolo e le 'ngoe ea kristale ea nano-ZnO e utloang khase ke e' ngoe ea litsela tse ka thōko, tse kang ZnO single crystal nanorod gas sensors.

4. Lisebelisoa tsa ho lemoha khase tse sebelisitsoeng Nano Indium Oxide(In2O3)
Indium oxide (In2O3)ke ntho e hlahang ea mofuta oa n-mofuta oa semiconductor e utloang khase.Ha e bapisoa le SnO2, ZnO, Fe2O3, joalo-joalo, e na le lekhalo le leholo la lihlopha, ho hanyetsa ho fokolang le ts'ebetso e phahameng ea catalytic, le kutloisiso e phahameng ho CO le NO2.Porous nanomaterials e emeloang ke nano In2O3 ke e 'ngoe ea libaka tsa morao-rao tsa lipatlisiso.Bafuputsi ba ile ba kopanya lisebelisoa tsa mesoporous In2O3 ka mokhoa oa phetisetso ea template ea mesoporous silica.Lisebelisoa tse fumanoeng li na le botsitso bo botle boemong ba 450-650 ° C, kahoo li loketse lisebelisoa tsa khase tse nang le mocheso o phahameng oa ho sebetsa.Li na le kutloelo-bohloko ho methane 'me li ka sebelisoa bakeng sa ho lekola ho phatloha ho amanang le mahloriso.

5. Lisebelisoa tsa ho lemoha khase tse sebelisitsoeng Nano Tungsten Oxide(WO3)
WO3 nanoparticleske sesebelisoa sa transition metal semiconductor se ithutoang haholo le ho sebelisoa bakeng sa thepa ea sona e ntle ea ho utloa khase.Nano WO3 e na le mehaho e tsitsitseng e kang triclinic, monoclinic le orthorhombic.Bafuputsi ba lokiselitse li-nanoparticles tsa WO3 ka mokhoa oa nano-casting ba sebelisa mesoporous SiO2 e le template.Ho ile ha fumanoa hore monoclinic WO3 nanoparticles e nang le karolelano ea boholo ba 5 nm e na le ts'ebetso e ntle ea ho utloa khase, 'me li-pair tsa sensor tse fumanoang ke electrophoretic deposition ea WO3 nanoparticles Low concentrations tsa NO2 li na le karabelo e phahameng.

Kabo ea homogeneous ea hexagonal phase WO3 nanoclusters e entsoe ka mokhoa oa ion exchange-hydrothermal.Liphetho tsa tlhahlobo ea kutlo ea khase li bonts'a hore sensor ea khase ea nanoclustered WO3 e na le mocheso o tlase oa ts'ebetso, kutlo e phahameng ho acetone le trimethylamine le nako e nepahetseng ea ho khutlisa karabo, e senola tebello e ntle ea ts'ebeliso ea thepa.

6. Lisebelisoa tsa ho lemoha khase tse sebelisitsoeng Nano Titanium Dioxide(TiO2)
Titanium dioxide (TiO2)lisebelisoa tsa ho lemoha khase li na le melemo ea botsitso bo botle ba mocheso le mokhoa o bonolo oa ho lokisetsa, 'me butle-butle li fetohile boitsebiso bo bong bo chesang bakeng sa bafuputsi.Hajoale, lipatlisiso mabapi le sensor ea khase ea nano-TiO2 e tsepamisitse maikutlo ho nanostructure le ts'ebetso ea lisebelisoa tsa kutlo tsa TiO2 ka ho sebelisa nanotechnology e hlahang.Ka mohlala, bafuputsi ba entse li-fibers tse nyenyane tsa nano-scale TiO2 ka theknoloji ea coaxial electrospinning.Sebelisa premixed stagnant lelakabe thekenoloji, eleketrode sefapano e ka makhetlo-khetlo behoa ka premixed stagnant lelakabe le le titanium tetraisopropoxide e le selelekela, 'me joale ka ho toba hōlileng ka ho etsa o porous lera le TiO2 nanoparticles, e leng e nahanela karabelo ho CO. Ka nako e le 'ngoe e ntse e hōla e laetsoeng TiO2. nanotube array ka anodization mme e e sebelisa ho lemoha SO2.

7. Li-composites tsa Nano oxide bakeng sa lisebelisoa tse utloang khase
Thepa ea ho lemoha khase ea nano metal oxides powders sensors e ka ntlafatsoa ka doping, e sa fetoleng motlakase oa motlakase oa thepa feela, empa hape e ntlafatsa botsitso le khetho.Doping ea lintho tsa bohlokoa tsa tšepe ke mokhoa o tloaelehileng, 'me likarolo tse kang Au le Ag li atisa ho sebelisoa e le li-dopants ho ntlafatsa ts'ebetso ea khase ea nano zinc oxide powder.Nano oxide composite gas sensing material haholo-holo e kenyelletsa Pd doped SnO2, Pt-doped γ-Fe2O3, le lintho tse ngata tse kenyelletsoeng In2O3 hollow sphere sensing material, tse ka lemohuoang ka ho laola li-additives le mocheso oa ho lemoha ho lemoha ka ho khetheha NH3, H2S le CO. Ho phaella moo, filimi ea WO3 nano e fetotsoe ka lera la V2O5 ho ntlafatsa sebopeho sa porous holim'a filimi ea WO3, kahoo e ntlafatsa kutloisiso ea eona ho NO2.

Hona joale, metsoako ea graphene / nano-metal oxide e fetohile sebaka se seholo sa lisebelisoa tsa khase.Graphene/SnO2 nanocomposites e 'nile ea sebelisoa haholo e le ho lemoha ammonia le lisebelisoa tsa ho lemoha tsa NO2.