A matsayin babban na'urori masu auna iskar gas, Nano karfe oxide semiconductor gas na'urori masu auna firikwensin ana amfani da su sosai a cikin samar da masana'antu, kula da muhalli, kula da lafiya da sauran fagage don girman hankalinsu, ƙarancin masana'anta da ma'aunin sigina mai sauƙi.A halin yanzu, bincike game da haɓaka kaddarorin gano iskar gas na nano ƙarfe oxide kayan haɓɓaka kayan aiki galibi yana mai da hankali kan haɓakar nanoscale ƙarfe oxides, kamar nanostructure da gyaran doping.

Nano karfe oxide semiconductor ji kayan ne yafi SnO2, ZnO, Fe2O3, VO2, In2O3, WO3, TiO2, da dai sauransu The firikwensin sassa har yanzu mafi yadu amfani resistive gas na'urori masu auna sigina, wadanda ba juriya gas na'urori masu auna sigina kuma ana samun da sauri sauri.

A halin yanzu, babban jagorar bincike shine shirya nanomaterials da aka tsara tare da babban yanki na musamman, irin su nanotubes, nanorod arrays, membranes nanoporous, da dai sauransu don haɓaka ƙarfin adsorption na iskar gas da ƙimar yaduwar iskar gas, don haka haɓaka hankali da saurin amsawa. zuwa gas na kayan.Ƙarfe na oxide na farko, ko gina tsarin nanocomposite, abubuwan da aka gabatar da dopant ko abubuwan da aka haɗa zasu iya taka rawar gani, kuma suna iya zama mai ɗaukar hoto don gina nanostructure, don haka inganta aikin ji na iskar gas gaba ɗaya. kayan aiki.

1. Ana amfani da kayan gano gas Nano Tin Oxide (SnO2)

Tin oxide (SnO2) wani nau'i ne na gabaɗaya m kayan kula da iskar gas.Yana da kyau ji na ƙwarai ga gas kamar ethanol, H2S da CO. Its iskar gas hankali ya dogara da barbashi size da takamaiman surface area.Sarrafa girman SnO2 nanopowder shine mabuɗin inganta haɓakar iskar gas.

Dangane da mesoporous da macroporous nano tin oxide powders, masu binciken sun shirya na'urori masu auna fim masu kauri waɗanda ke da babban aiki mai ƙarfi don CO oxidation, wanda ke nufin haɓakar iskar gas.Bugu da ƙari, tsarin nanoporous ya zama wuri mai zafi a cikin zane na kayan gano gas saboda babban SSA, wadataccen iskar gas da tashoshi masu yawa.

2. Ana amfani da kayan gano gas Nano Iron Oxide (Fe2O3)

Iron oxide (Fe2O3)yana da nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i)Amfani da Alpha.α-Fe2O3 na cikin tsarin corundum, wanda kaddarorinsa na zahiri sun tabbata.Na'urar gano iskar gas ɗinta ana sarrafa ta sama, kuma hankalinsa ya yi ƙasa kaɗan.γ-Fe2O3 na cikin tsarin kashin baya kuma yana iya daidaitawa.Na'urar gano iskar gas ɗin sa galibi sarrafa juriya ne na jiki.Yana da kyakkyawar azanci amma rashin kwanciyar hankali, kuma yana da sauƙin canzawa zuwa α-Fe2O3 kuma yana rage iskar gas.

Binciken na yanzu yana mayar da hankali kan inganta yanayin haɓakawa don sarrafa ilimin halittar jini na Fe2O3 nanoparticles, sa'an nan kuma nunawa ga kayan da suka dace da iskar gas, irin su α-Fe2O3 nanobeams, α-Fe2O3 nanorods, monodisperse α-Fe2O3 nanostructures, α-Fe2O3 nanostructures, α-Fe2O3 nanostructures, α-Fe2O3. nanomaterials, da dai sauransu.

3. Ana amfani da kayan gano gas Nano Zinc Oxide (ZnO)
Zinc oxide (ZnO)abu ne na yau da kullun mai sarrafa iskar gas.Firikwensin gas na tushen ZnO yana da babban zafin aiki da zaɓi mara kyau, yana mai da shi ƙasa da amfani sosai fiye da SnO2 da Fe2O3 nanopowders.Saboda haka, shirye-shiryen sabon tsarin ZnO nanomaterials, doping gyare-gyare na nano-ZnO don rage aiki zafin jiki da kuma inganta selectivity ne mayar da hankali na bincike a kan nano ZnO gas ji kayan.

A halin yanzu, haɓaka nau'in gano gas ɗin crystal nano-ZnO ɗaya ɗaya ne daga cikin kwatance, kamar ZnO single crystal nanorod gas firikwensin.

4. Ana amfani da kayan gano gas Nano Indium Oxide (In2O3)
Indium oxide (In2O3)wani abu ne mai tasowa na nau'in n-nau'in iskar gas.Idan aka kwatanta da SnO2, ZnO, Fe2O3, da dai sauransu, yana da rata mai fadi, ƙananan juriya da babban aiki na catalytic, da babban hankali ga CO da NO2.Nanomaterials na porous wanda nano In2O3 ke wakilta sune ɗayan wuraren bincike na kwanan nan.Masu binciken sun haɗa kayan In2O3 mesoporous oda ta hanyar kwafin samfuri na silica mesoporous.Abubuwan da aka samu suna da kwanciyar hankali mai kyau a cikin kewayon 450-650 ° C, don haka sun dace da na'urori masu auna iskar gas tare da yanayin zafi mafi girma.Suna kula da methane kuma ana iya amfani da su don saka idanu mai alaƙa da fashewa.

5. Ana amfani da kayan gano gas Nano Tungsten Oxide (WO3)
WO3 nanoparticleswani abu ne na tsaka-tsaki na ƙarfe na tsaka-tsaki wanda aka yi nazari sosai kuma aka yi amfani da shi don kyakkyawan kayan gano iskar gas.Nano WO3 yana da tsayayyen tsari kamar triclinic, monoclinic da orthorhombic.Masu binciken sun shirya WO3 nanoparticles ta hanyar simintin nano ta hanyar amfani da SiO2 mesoporous azaman samfuri.An gano cewa monoclinic WO3 nanoparticles tare da matsakaita girman 5 nm suna da mafi kyawun aikin gano iskar gas, kuma nau'ikan firikwensin da aka samu ta hanyar sakawa na WO3 nanoparticles Ƙananan ƙira na NO2 suna da babban amsa.

Rarraba iri ɗaya na lokaci hexagonal WO3 nanoclusters an haɗa shi ta hanyar musayar ion-hydrothermal.Sakamakon gwajin gwaji na iskar gas ya nuna cewa WO3 nanoclustered gas firikwensin yana da ƙananan zafin jiki na aiki, babban hankali ga acetone da trimethylamine da kuma lokacin dawo da amsa mai kyau, yana nuna kyakkyawan yanayin aikace-aikacen kayan.

6. Ana amfani da kayan gano gas Nano Titanium Dioxide (TiO2)
Titanium dioxide (TiO2)Abubuwan gano gas suna da fa'idodin kwanciyar hankali mai kyau na thermal da tsari mai sauƙi, kuma a hankali sun zama wani abu mai zafi don masu bincike.A halin yanzu, bincike akan firikwensin gas na nano-TiO2 yana mai da hankali kan tsarin nanostructure da aiki na kayan ji na TiO2 ta amfani da nanotechnology masu tasowa.Alal misali, masu bincike sun yi micro-nano-sikelin m TiO2 zaruruwa ta coaxial electrospinning fasaha.Yin amfani da premixed m harshen wuta fasaha, giciye lantarki da aka akai-akai sanya shi a cikin wani premixed m harshen wuta da titanium tetraisopropoxide a matsayin precursor, sa'an nan kai tsaye girma ya samar da ya porous membrane da TiO2 nanoparticles, wanda shi ne m amsa ga CO. Lokaci guda girma da oda TiO2 nanotube array ta hanyar anodization kuma yana amfani da shi don gano SO2.

7. Nano oxide composites don gas gane abu
Ana iya inganta kayan haɓakar iskar gas na nano karfe oxides foda kayan haɓakawa ta hanyar doping, wanda ba wai kawai daidaita yanayin wutar lantarki na kayan ba, amma kuma yana inganta kwanciyar hankali da zaɓi.Doping na abubuwa masu daraja na ƙarfe hanya ce ta gama gari, kuma ana amfani da abubuwa kamar su Au da Ag azaman dopants don haɓaka aikin gano iskar gas na nano zinc oxide foda.Nano oxide composite gas sensing kayan yafi hada da Pd doped SnO2, Pt-doped γ-Fe2O3, da Multi-element kara da cewa In2O3 m sphere abu abu, wanda za a iya gane ta hanyar sarrafa additives da kuma jin zafin jiki don gane zaɓaɓɓen gano NH3, H2S da CO. Bugu da kari, WO3 nano fim da aka gyara tare da Layer na V2O5 don inganta porous surface tsarin na WO3 fim, game da shi inganta ta ji na ƙwarai to NO2.

A halin yanzu, graphene/nano-metal oxide composites sun zama wuri mai zafi a cikin kayan firikwensin gas.Graphene/SnO2 nanocomposites an yi amfani da su sosai azaman gano ammonia da kayan ji na NO2.