Raws li qhov tseem ceeb ruaj khov-lub xeev cov roj sensors, nano hlau oxide cov roj teeb, kev saib xyuas ib puag ncig, cov nqi tsim kho kom zoo thiab ntsuas tau yooj yim. Tam sim no, tshawb fawb txog kev txhim kho cov roj ntawm cov khoom siv hlau oxide cov khoom siv tshwj xeeb, xws li kev hloov kho nanostructure thiab doping hloov kho.

Nano hlau oxide oxide olide semiconductor cov ntaub ntawv hnov ​​qab yog tsuas yog Sensor cov roj sensors kuj tseem muaj cov roj uas tsis tshua muaj zog tseem tau raug tsim kho sai sai.

Tam sim no, cov kev tshawb fawb tseem ceeb yog los npaj cov qauv muaj teeb meem thiab cov pa roj sib txawv, thiab txhim kho cov lus teb kom zoo thiab ua kom nrawm nrawm rau cov roj. The elemental doping of the metal oxide, or the construction of the nanocomposite system, the introduced dopant or composite components can play a catalytic role, and can also become an auxiliary carrier for constructing the nanostructure, thereby improving the overall gas sensing performance of the sensing materials.

1. Cov Khoom Siv Roj Siv Nano Tin Oxide (SNO2)

Tin oxide (SNO2) yog hom kev nkag siab dav dav roj rhiab. Nws muaj qhov zoo rhiab rau gases xws li ethanol, h2s thiab co. Nws cov roj rhiab yog nyob ntawm qhov loj me thiab thaj chaw tshwj xeeb. Tswj qhov loj ntawm Sno2 nanopowder yog tus yuam sij rau kev txhim kho cov roj rhiab.

Raws li Mesoporous thiab Macroporous Nano Tin o o o o o o o o o o oxide kev ua si uas muaj cov khoom siv oxidation, uas txhais tau tias ntau dua roj zoo nkauj heev kev ua si. Tsis tas li ntawd, cov qauv nanoporous tau dhau los ua cov chaw kub hauv kev tsim cov roj tshuab ssa vim nws cov khoom loj, kev nplua nuj roj diffusion thiab huab hwm coj hloov mus raws.

2. Roj Hnov Khoom Siv Nano Hlau Oxide (Fe2o3)

Hlau Oxide (Fe2o3)Muaj ob daim ntawv siv lead ua: alpha thiab gamma, ob leeg tuaj yeem siv ua cov roj ntsha uas hnov ​​tau cov khoom siv, tab sis cov roj pom kev zoo ntawm lawv muaj qhov sib txawv loj. α-FE2O3 BELTS RAU COLUNDUM qauv, uas nws lub zog lub cev ruaj khov. Nws cov roj pom kev zoo nkauj yog nto tswj, thiab nws rhiab yog tsawg. γ-FEE2O3 belongs rau spinel qauv thiab yog litastable. Nws cov roj pom kev zoo yog lub cev tsis kam tswj hwm tab sis yooj yim hloov mus rau α-FE2O3 thiab txo cov roj rhiab.

Cov kev tshawb fawb tam sim no tsom rau kev ua kom zoo rau cov cuab yeej roj synthesis, thiab tom qab ntawd kuaj xyuas rau cov khoom siv roj fe2o-fe2o3 Nanoopes α-Fe2O3 Nanomaterials, thiab lwm yam.

3. Cov Khoom Siv Roj Siv Nano Zinc Oxide (Zno)
Zinc Oxide (ZNO)yog ib qho kev tswj cov roj-tswj cov roj-rhiab. Lub ZNO raws li roj sensor muaj lub siab ua haujlwm kub thiab kev xaiv tsis zoo, ua rau nws tsis tshua muaj dav siv dua SNO2 thiab FE2O3 nanopowders. Yog li ntawd, kev npaj cov qauv tshiab ntawm zno nanomaterials, doping kev hloov kho ntawm kev ua haujlwm kub thiab txhim kho cov kev tshawb fawb ntawm nano zno roj sensing cov ntaub ntawv.

Ntawm tam sim no, kev tsim ntawm tib lub siv roj khov kho lub caij yog ib qho ntawm cov lus qhia frontier, xws li zno ib leeg lead ua nraug sensors.

4. Roj Hnov Khoom Siv Nano Indium Oxide (In2o3)
Inium oxide (in2o3)yog qhov tawm n-hom semiconductor roj siab cov khoom siv. Piv nrog SNO2, ZNO, FE2O3, thiab lwm yam, nws muaj cov kev ua haujlwm dav dav, thiab siab catalytic ua haujlwm, thiab siab rhiab rau co thiab tsis muaj. Cov Nanomaterials tseem ceeb sawv cev los ntawm Nano In2o3 yog ib qho ntawm cov kev tshawb fawb tsis ntev los no. Cov kws tshawb nrhiav synthesized orded mesoporous in2o3 cov ntaub ntawv los ntawm txhais tau tias yog Mesoporous Silica template rov ua dua. Cov khoom tau txais tau zoo ruaj khov nyob rau hauv thaj tsam ntawm 450-650 ° C, yog li lawv haum rau cov roj sensors nrog kev ua haujlwm siab dua. Lawv muaj kev nkag siab rau methane thiab tuaj yeem siv rau kev pom zoo cov kev soj ntsuam.

5. Roj Hnov Khoom Siv Nano Tungsten Oxide (Wo3)
Wo3 nanoparticlesyog kev hloov cov hlau compound semiconductor cov khoom siv uas tau muaj dav kawm thiab thov nws cov cuab yeej roj zoo. Nano wo3 muaj cov qauv ruaj khov xws li triclinic, monoclinic thiab Orthoorhomic. Cov kws tshawb fawb npaj Wo3 nanoparticles los ntawm nano-cam khwb cia siv mesoporous sio2 ua qauv. Nws tau pom tias lub monoclinic wo3 nanoparticles nrog qhov nruab nrab ntawm 5 nanoparticles kev ua tau zoo ntawm Wo3 Nanoparticles qis ntawm No2 muaj cov lus teb siab siab.

Cov homogeneous faib ntawm hexagonal theem Wo3 nanoclusters tau synthesized los ntawm ion pauv pauv-hydrothermal txoj kev. Cov roj rhiab heev cov txiaj ntsig tau qhia tias WO3 nanoclustered roj sensor muaj cov lus teb rov qab thiab ua kom zoo dua lub sijhawm, pom ib daim ntawv thov zoo ntawm cov khoom.

6. Cov Khoom Siv Roj Siv Nano Titanium Dioxide (Tii2)
Titanium Dioxide (Tii2)Cov khoom siv roj puas muaj qhov zoo ntawm txoj kev zoo thermal stability thiab npaj npaj yooj yim, thiab muaj maj mam dhau los ua lwm cov khoom siv kub rau cov kws tshawb nrhiav. Tam sim no, kev tshawb fawb ntawm Nano-Tio2 roj sensor tsom rau cov nanostructure tio2 sensing cov ntaub ntawv los ntawm kev siv cov khoom tawm tshiab nanotechnology. Piv txwv li, cov kws tshawb nrhiav tau ua micro-nano-nplai hollow tio2 fibers los ntawm kev siv tshuab hluav taws xob electrospinning Technologying Technology. Siv cov nplaim hluavtaws stagnant, tus ntoo khaub lig elegrode nrawm nrog tio2 nanotube array los ntawm anodization thiab siv nws rau kev kuaj pom ntawm So2.

7. Nano oxide composites rau roj kev hnov ​​cov khoom siv
Cov roj pom kev ntawm nano hlau oxides sensing cov ntaub ntawv tuaj yeem txhim kho los ntawm doping hluav taws xob, uas tsis yog kho cov khoom hluav taws xob, tab sis kuj txhim kho qhov ruaj khov thiab xaiv. Doping ntawm cov khoom muaj nqis yog ib qho kev sib xws, thiab cov ntsiab lus xws li AU thiab AG feem ntau siv los ua AU thiab AG feem ntau siv los txhim kho cov roj kev ua tau zoo ntawm nano zinc oxide hmoov. Nano oxide composite cov khoom siv roj feem ntau suav nrog PD doped γ-following γ Zaj duab xis, yog li kev txhim kho nws cov rhiab rau No2.

Tam sim no, graphene / nano-hlau oxide composites tau dhau los ua hotspot hauv cov ntaub ntawv roj sensor. Graphene / SNO2 Nanocomposites tau siv dav siv ua ammonia nrhiav tau thiab tsis muaj2 cov ntaub ntawv hnov.