Njengezinzwa eziyinhloko zegesi eqinile, izinzwa zegesi ze-nano metal oxide semiconductor zisetshenziswa kabanzi ekukhiqizeni izimboni, ukuqapha indawo ezungezile, ukunakekelwa kwezempilo kanye nezinye izinkambu ngenxa yokuzwela kwazo okuphezulu, izindleko eziphansi zokukhiqiza kanye nokulinganisa isignali elula.Njengamanje, ucwaningo lokuthuthukiswa kwezakhiwo zokuzwa igesi ze-nano metal oxide sensing materials ikakhulukazi lugxile ekuthuthukisweni kwama-nanoscale metal oxides, njenge-nanostructure nokuguqulwa kwe-doping.

Izinto zokuzwa i-Nano metal oxide semiconductor ikakhulukazi i-SnO2, i-ZnO, i-Fe2O3, i-VO2, i-In2O3, i-WO3, i-TiO2, njll. Izingxenye zezinzwa kuseyizinzwa zegesi ezimelana nezisetshenziswa kakhulu, izinzwa zamagesi ezingazweli nazo ziyathuthukiswa ngokushesha okukhulu.

Okwamanje, inkomba eyinhloko yocwaningo ukulungisa ama-nanomaterials ahlelekile anendawo enkulu ethile, njengama-nanotubes, ama-nanorod arrays, ama-nanoporous membranes, njll.ukwandisa umthamo wokukhangisa kwegesi nezinga lokusatshalaliswa kwegesi, ngaleyo ndlela kuthuthukiswe ukuzwela kanye nesivinini sokuphendula. kuya kwegesi yezinto zokwakha.I-doping eyisisekelo ye-metal oxide, noma ukwakhiwa kwesistimu ye-nanocomposite, i-dopant eyethulwe noma izingxenye eziyinhlanganisela zingadlala indima ebalulekile, futhi zingaba umthwali osizayo wokwakha i-nanostructure, ngaleyo ndlela ithuthukise ukusebenza kokuzwa kwegesi kukonke kokuzwa. izinto zokwakha.

1. Izinto zokuzwa igesi ezisetshenzisiwe i-Nano Tin Oxide(SnO2)

I-tin oxide (SnO2) iwuhlobo lwento evamile ezwelayo yegesi.Izwela kahle kumagesi afana ne-ethanol, i-H2S ne-CO. Ukuzwela kwayo kwegesi kuncike kusayizi wezinhlayiyana nendawo ethile.Ukulawula usayizi we-SnO2 nanopowder kuyisihluthulelo sokuthuthukisa ukuzwela kwegesi.

Ngokusekelwe kuma-mesoporous kanye nama-macroporous nano tin oxide powders, abacwaningi balungise izinzwa zefilimu eziwugqinsi ezinomsebenzi ophezulu we-catalytic we-CO oxidation, okusho umsebenzi ophezulu wokuzwa igesi.Ngaphezu kwalokho, isakhiwo se-nanoporous sesiphenduke indawo eshisayo ekwakhiweni kwezinto zokuzwa igesi ngenxa ye-SSA yayo enkulu, ukusabalalisa kwegesi ecebile kanye neziteshi zokudlulisa izinqwaba.

2. Izinto zokuzwa igesi ezisetshenziswa i-Nano Iron Oxide(Fe2O3)

I-iron oxide (Fe2O3)inezinhlobo ezimbili zekristalu: i-alpha ne-gamma, zombili ezingasetshenziswa njengezinto zokuzwa igesi, kodwa izici zazo zokuzwa igesi zinomehluko omkhulu.I-α-Fe2O3 ingeyesakhiwo se-corundum, izakhiwo zayo ezingokomzimba ezinzile.Indlela yayo yokuzwa igesi ilawulwa phezulu, futhi ukuzwela kwayo kuphansi.I-γ-Fe2O3 ingeyesakhiwo somgogodla futhi iyametastable.Indlela yayo yokuzwa igesi ngokuyinhloko iwukulawula ukumelana nomzimba.Inokuzwela okuhle kodwa ukuzinza okubi, futhi kulula ukuyishintsha ibe yi-α-Fe2O3 futhi inciphise ukuzwela kwegesi.

Ucwaningo lwamanje lugxile ekwandiseni izimo zokwenziwa ukuze kulawulwe i-morphology ye-Fe2O3 nanoparticles, bese kuhlolelwa izinto ezifanele ezizwela igesi, njenge-α-Fe2O3 nanobeams, ama-nanorods a-α-Fe2O3 anezimbobo, i-monodisperse α-Fe2O3 nanostructures, mesopores α-Fe. ama-nanomaterials, njll.

3. Izinto zokuzwa igesi ezisetshenziswa i-Nano Zinc Oxide(ZnO)
I-Zinc oxide (ZnO)kuyinto ejwayelekile elawulwa phezulu engezwani negesi.Inzwa yegesi esekwe ku-ZnO inezinga lokushisa eliphezulu lokusebenza kanye nokungakhethi kahle, okuyenza isetshenziswe kancane kakhulu kune-SnO2 ne-Fe2O3 nanopowder.Ngakho-ke, ukulungiswa kwesakhiwo esisha se-ZnO nanomaterials, ukuguqulwa kwe-doping ye-nano-ZnO ukuze kuncishiswe izinga lokushisa lokusebenza nokuthuthukisa ukukhetha kugxile ocwaningweni lwezinto zokuzwa igesi ye-nano ZnO.

Njengamanje, ukuthuthukiswa kwesici esisodwa se-crystal nano-ZnO senzwa yegesi kungenye yezinkomba ezisemngceleni, njengezinzwa ze-ZnO single crystal nanorod gas.

4. Izinto zokuzwa igesi ezisetshenziswa i-Nano Indium Oxide(In2O3)
I-Indidium oxide (In2O3)iwuhlobo lwe-n-uhlobo lwe-semiconductor yegesi ezwayo evelayo.Uma iqhathaniswa ne-SnO2, i-ZnO, i-Fe2O3, njll., inegebe elibanzi lebhendi, ukumelana nokumelana okuncane nomsebenzi ophezulu we-catalytic, nokuzwela okuphezulu ku-CO ne-NO2.Ama-nanomaterials anezimbotshana amelwe i-nano In2O3 angenye yezindawo ezinocwaningo lwakamuva.Abacwaningi bahlanganisa izinto ezi-odwa ze-mesoporous In2O3 ngokusebenzisa ukuphindaphinda kwesifanekiso se-silica e-mesoporous.Izinto ezitholiwe zinokuzinza okuhle ebangeni lika-450-650 ° C, ngakho-ke zifanele izinzwa zegesi ezinamazinga okushisa aphezulu okusebenza.Azwela ku-methane futhi angasetshenziselwa ukuqapha ukuqhuma okuhlobene nokugxilisa ingqondo.

5. Izinto zokuzwa igesi ezisetshenziswa i-Nano Tungsten Oxide(WO3)
WO3 nanoparticlesiyinsimbi eguquguqukayo eyinhlanganisela ye-semiconductor impahla efundwe kabanzi futhi yasetshenziswa endaweni yayo enhle yokuzwa igesi.I-Nano WO3 inezakhiwo ezizinzile njenge-triclinic, i-monoclinic kanye ne-orthorhombic.Abacwaningi balungiselela i-WO3 nanoparticles ngendlela ye-nano-casting besebenzisa i-mesoporous SiO2 njengesifanekiso.Kutholakale ukuthi i-monoclinic WO3 nanoparticles enobukhulu obuyisilinganiso se-5 nm inokusebenza okungcono kokuzwa kwegesi, futhi amapheya wezinzwa atholwe nge-electrophoretic deposition ye-WO3 nanoparticles Ukugxila okuphansi kwe-NO2 kunempendulo ephezulu.

Ukusatshalaliswa okulinganayo kwesigaba se-WO3 nanocluster esine-hexagonal kwahlanganiswa ngendlela ye-ion exchange-hydrothermal.Imiphumela yokuhlola ukuzwela kwegesi ibonisa ukuthi inzwa yegesi ye-WO3 nanoclustered inezinga lokushisa eliphansi lokusebenza, ukuzwela okuphezulu ku-acetone ne-trimethylamine kanye nesikhathi esikahle sokuphendula impendulo, eveza ithemba elihle lesicelo sezinto ezibonakalayo.

6. Izinto zokuzwa igesi ezisetshenzisiwe i-Nano Titanium Dioxide(TiO2)
I-Titanium dioxide (TiO2)izinto zokuzwa igesi zinezinzuzo zokuzinza okuhle kokushisa kanye nenqubo elula yokulungiselela, futhi kancane kancane ziye zaba enye impahla eshisayo yabacwaningi.Njengamanje, ucwaningo lwenzwa yegesi ye-nano-TiO2 lugxile ekwakhiweni kwe-nanostructure nasekusebenzeni kahle kwezinto zokuzwa ze-TiO2 kusetshenziswa i-nanotechnology esafufusa.Isibonelo, abacwaningi benze imicu ye-TiO2 enezingqimba ezincane-nano-scale ngobuchwepheshe be-coaxial electrospinning.Kusetshenziswa ubuchwepheshe belangabi elixutshwe ngaphambili, i-electrode eyisiphambano ibekwa ngokuphindaphindiwe elangabini elimile elixutshwe ngaphambili eline-titanium tetraisopropoxide njengesandulela, bese ikhula ngokuqondile ukuze yakhe ulwelwesi olunezimbotshana olune-TiO2 nanoparticles, okuyimpendulo ebucayi ku-CO. Ngesikhathi esifanayo ikhulisa i-TiO2 e-odiwe. i-nanotube array by anodization futhi iyisebenzise ekutholweni kwe-SO2.

7. Inhlanganisela ye-Nano oxide yezinto ezizwa igesi
Izakhiwo zokuzwa igesi ze-nano metal oxides powders sensing materials zingathuthukiswa nge-doping, engalungisi nje kuphela ukuqhutshwa kukagesi kwento, kodwa futhi ithuthukisa ukuzinza nokukhetha.I-Doping yezinto zensimbi eyigugu iyindlela evamile, futhi izakhi ezifana ne-Au ne-Ag zivame ukusetshenziswa njengama-dopants ukuze kuthuthukiswe ukusebenza kokuzwa kwegesi kwe-nano zinc oxide powder.Izinto zokuzwa igesi eziyinhlanganisela ye-Nano oxide ikakhulukazi zifaka i-Pd doped SnO2, i-Pt-doped γ-Fe2O3, kanye nezinto eziningi ezinzwa nge-In2O3 hollow sphere, ezingabonakala ngokulawula izithasiselo nezinzwa lokushisa ukuze kutholwe ukutholwa okukhethekile kwe-NH3, H2S ne-CO. Ngaphezu kwalokho, ifilimu ye-WO3 nano ilungiswa ngongqimba lwe-V2O5 ukuze kuthuthukiswe ukwakheka kwendawo enezimbotshana yefilimu ye-WO3, ngaleyo ndlela kuthuthukiswe ukuzwela kwayo ku-NO2.

Njengamanje, izinhlanganisela ze-graphene/nano-metal oxide seziphenduke indawo eshisayo ezintweni zokuzwa igesi.I-Graphene/SnO2 nanocomposites isetshenziswe kabanzi njengokutholwa kwe-ammonia nezinto zokuzwa ze-NO2.