Iindlela ezahlukeneyo zeenzwa ze-oxygen zonyango zezi: i-electrochemical sensors, i-fluorescent oxygen sensors
1. Inzwa yeoksijini ye-Electrochemical
Izinto zokuva ioksijini ye-Electrochemical zisetyenziswa ikakhulu ukulinganisa umxholo weoksijini kumoya ongqongileyo.Ezi zinzwa zihlanganiswe kumatshini we-RGM ukulinganisa ukuxinwa kokunikezelwa kwe-oxygen.Bashiya utshintsho lweekhemikhali kwindawo yokuva, okukhokelela ekuphumeni kombane ngokulinganayo kwinqanaba le-oxygen.Izinzwa ze-Electrochemical ziguqula amandla ekhemikhali abe ngamandla ombane ngokusebenzisa i-oxidation kunye neenkqubo zokunciphisa.Inika imveliso yombane kwisixhobo ngokulinganayo nepesenti ye-oxygen kwi-cathode kunye ne-anode.I-sensor ye-oxygen isebenza njengomthombo wangoku, ngoko ke umlinganiselo we-voltage wenziwa ngokumelana nomthwalo.Imveliso yangoku ye-oxygen sensor ilingana nezinga lokusetyenziswa kwe-oksijini yinzwa ye-oxygen.
Imveliso yangoku ye-electrochemical sensor idla ngokulinganiswa kwii-microamps (a).Oku kwangoku kwenzeka xa ii-electron zidlula kwinkqubo ye-oxidation kwi-anode kunye ne-ion zisasazeka kwisisombululo se-electrolyte ukusuka kwinkqubo yokunciphisa i-oxygen kwi-cathode.
2. Inzwa ye-oxygen ene-Fluorescent
I-Optical sensors ye-oxygen isekelwe kumgaqo we-fluorescence yokucima i-oxygen.Bathembele ekusetyenzisweni kwemithombo yokukhanya, izixhobo zokukhanya kunye nezinto ezikhanyayo ezisabela ekukhanyeni.I-Luminescence-based sensors ye-oxygen ithatha indawo ye-electrochemical oxygen sensors kwiindawo ezininzi.
Umgaqo we-molecular oxygen fluorescence quenching uyaziwa kudala.Ezinye iimolekyuli okanye iikhompawundi ze-fluoresce (oko kukuthi, zikhupha amandla okukhanya) xa zibekwe ekukhanyeni.Nangona kunjalo, ukuba iimolekyuli ze-oksijini zikhona, amandla okukhanya adluliselwa kwiimolekyuli ze-oksijini, okukhokelela kwi-fluorescence encinci.Ngokusebenzisa umthombo wokukhanya owaziwayo, amandla okukhanya afunyenweyo ahambelana ngokungafaniyo nenani leemolekyuli zeoksijini kwisampulu.Ke ngoko, i-fluorescence encinci ifunyenwe, kokukhona iimolekyuli zeoksijini kufuneka zibekho kwisampulu yegesi.
Kwezinye izinzwa, i-fluorescence ibonwa kabini ngaphakathi kwexesha elaziwayo lexesha.Endaweni yokulinganisa i-fluorescence iyonke, ukuhla kwe-fluorescence ngokuhamba kwexesha (oko kukuthi, ukucinywa kwe-fluorescence) kuyalinganiswa.Le ndlela yokubola esekelwe kwixesha ivumela ukuyila kwenzwa elula.
Isivamvo sombhobho we-oxygen efluorescent i-LOX-02-F sisivamvo esisebenzisa i-fluorescence quenching ye-oksijini ukulinganisa amanqanaba e-oksijini ambient.Nangona inesakhiwo esifanayo sekholomu kunye nobukhulu be-4-series njenge-electrochemical sensors eziqhelekileyo, ayifaki i-oksijini kwaye inenzuzo yokuphila ixesha elide (iminyaka emi-5).Oku kuyenza ibe luncedo kwizixhobo ezinje nge-alam zokhuseleko lokuphelelwa kweoksijini kwigumbi elijonga ukwehla ngequbuliso kumanqanaba e-oksijini kwigesi ecinezelweyo egcinwe emoyeni wangaphakathi.
Ixesha lokuposa: Apr-14-2022