Izinzwa zomhlaba ezintsha zinokuphucula ukusebenza kakuhle kokuchumisa izityalo

Izichumisi ezine-nitrogen zisetyenziselwa ukwandisa imveliso yokutya, kodwa ukukhutshwa kwazo kungcolisa okusingqongileyo. Ukuze kusetyenziswe izixhobo zobutyebi kakhulu, kunyuswe isivuno sezolimo, kwaye kuncitshiswe iingozi zokusingqongileyo, kufuneka kujongwe rhoqo kwaye ngexesha langempela iimpawu zomhlaba, ezinje ngobushushu bomhlaba kunye nokukhutshwa kwesichumisi. I-sensor ye-multi-parameter iyimfuneko kwizolimo ezikrelekrele okanye ezichanekileyo ukulandelela ukukhutshwa kwegesi ye-NOX kunye nobushushu bomhlaba ukuze kufunyanwe ngcono.

UJames L. Henderson, Jr. Memorial uNjingalwazi oNcedisayo weSayensi yoBunjineli kunye neeMechanics ePenn State Huanyu “Larry” Cheng ukhokele uphuhliso lwesensa yeparameter ezininzi eyahlula ngempumelelo imiqondiso yobushushu kunye neyenitrogen ukuvumela ukulinganiswa ngokuchanekileyo kwento nganye.

UCheng uthe,"Ukuze kubekho ukuchumisa okusebenzayo, kukho imfuneko yokujonga rhoqo imeko yomhlaba ngexesha langempela, ngakumbi ukusetyenziswa kwe-nitrogen kunye nobushushu bomhlaba. Oku kubalulekile ekuhloleni impilo yezityalo, ukunciphisa ungcoliseko lokusingqongileyo, kunye nokukhuthaza ezolimo ezizinzileyo nezichanekileyo."

Olu phononongo lujolise ekusebenziseni ubungakanani obufanelekileyo ukuze kubekho isivuno esihle sesivuno. Imveliso yesityalo inokuba ngaphantsi kunokuba inokuba njalo ukuba kusetyenziswa initrogen engaphezulu. Xa isichumiso sisetyenziswa kakhulu, siyachithwa, izityalo zinokutsha, kwaye umsi wenitrogen onetyhefu uyakhutshwa kwindalo esingqongileyo. Abalimi banokufikelela kumanqanaba afanelekileyo esichumiso ukuze kukhule izityalo ngoncedo lokufumanisa amanqanaba enitrogen ngokuchanekileyo.

Umbhali-mbhali uLi Yang, uprofesa kwiSikolo soBukrelekrele boBugcisa boBugcisa kwiYunivesithi yoBugcisa yaseHebei eTshayina, uthe,"Ukukhula kwezityalo kukwachaphazeleka bubushushu, obuchaphazela iinkqubo zomzimba, iikhemikhali kunye ne-microbiological emhlabeni. Ukubeka iliso rhoqo kuvumela abalimi ukuba baphuhlise amaqhinga kunye nokungenelela xa amaqondo obushushu eshushu kakhulu okanye ebanda kakhulu kwizityalo zabo."

Ngokutsho kukaCheng, iindlela zokuva ezinokufumana igesi ye-nitrogen kunye nomlinganiselo wobushushu ngaphandle kolunye azixelwa rhoqo. Zombini iigesi kunye nobushushu zinokubangela umahluko kwindlela ekufundwa ngayo ukumelana nesensor, nto leyo eyenza kube nzima ukwahlula phakathi kwazo.

Iqela likaCheng lenze i-sensor esebenza kakuhle ekwaziyo ukubona ukulahleka kwe-nitrogen ngaphandle kobushushu bomhlaba. I-sensor yenziwe nge-vanadium oxide-doped, i-laser-induced graphene foam, kwaye kufunyaniswe ukuba i-doping metal complexes kwi-graphene iphucula ukufunxwa kwegesi kunye nokuqonda ukubonwa kwayo.

Ngenxa yokuba i-membrane ethambileyo ikhusela i-sensor kwaye ithintela ukungena kwegesi ye-nitrogen, i-sensor isabela kuphela kutshintsho lobushushu. I-sensor ingasetyenziswa ngaphandle kwe-encapsulation kwaye kubushushu obuphezulu.

Oku kuvumela ukulinganiswa ngokuchanekileyo kwegesi ye-nitrogen ngokususa iziphumo zokufuma kunye nobushushu bomhlaba. Ubushushu kunye negesi ye-nitrogen zinokuhlukaniswa ngokupheleleyo kwaye zingaphazanyiswa kusetyenziswa izinzwa ezivaliweyo nezingenazithintelo.

Umphandi uthe ukwahlulahlula utshintsho lobushushu kunye nokukhutshwa kwegesi ye-nitrogen kungasetyenziselwa ukudala nokusebenzisa izixhobo ezininzi ezineendlela zokubona ezidityanisiweyo zolimo oluchanekileyo kuzo zonke iimeko zemozulu.

UCheng uthe, “Ubuchule bokubona ngaxeshanye amazinga e-nitrogen oxide aphantsi kakhulu kunye notshintsho oluncinci lobushushu luvula indlela yophuhliso lwezixhobo ze-elektroniki ezininzi zexesha elizayo ezineendlela zokuvavanya ezidibeneyo zolimo oluchanekileyo, ukujonga impilo, kunye nezinye iindlela zokusebenza.”

Uphando lukaCheng luxhaswe yiNational Institutes of Health, iNational Science Foundation, iPenn State, kunye neChinese National Natural Science Foundation.