Izinzwa ezintsha zenhlabathi zingathuthukisa ukusebenza kahle komanyolo wezitshalo

Izivundisi eziqukethe i-nitrogen zisetshenziselwa ukwandisa ukukhiqizwa kokudla, kodwa ukukhishwa kwazo kungangcolisa imvelo. Ukuze kusetshenziswe kakhulu izinsizakusebenza, kukhuliswe isivuno sezolimo, futhi kuncishiswe izingozi zemvelo, ukuqapha okuqhubekayo nesikhathi sangempela kwezakhiwo zomhlabathi, njengokushisa kwenhlabathi kanye nokukhishwa komanyolo, kubalulekile. Inzwa yamapharamitha amaningi iyadingeka kwezolimo ezihlakaniphile noma ezinembile ukulandelela ukukhishwa kwegesi ye-NOX kanye nokushisa kwenhlabathi ukuze kutholakale umanyolo ongcono kakhulu.

UJames L. Henderson, Jr. Memorial, uProfesa Ohlangene Wezesayensi Nobuchwepheshe Bobunjiniyela ePenn State Huanyu “Larry” Cheng, uhole ukuthuthukiswa kwenzwa enamapharamitha amaningi ehlukanisa ngempumelelo izimpawu zokushisa ne-nitrogen ukuze kuvunyelwe ukulinganiswa okunembile kwento ngayinye.

UCheng uthe,"Ukuze kufakwe umanyolo ophumelelayo, kunesidingo sokuqapha okuqhubekayo nesikhathi sangempela kwezimo zenhlabathi, ikakhulukazi ukusetshenziswa kwe-nitrogen kanye nokushisa kwenhlabathi. Lokhu kubalulekile ekuhloleni impilo yezitshalo, ukunciphisa ukungcola kwemvelo, kanye nokukhuthaza ezolimo ezisimeme nezinembile."

Lolu cwaningo luhlose ukusebenzisa inani elifanele ukuze kutholakale isivuno esihle kakhulu. Ukukhiqizwa kwesitshalo kungaba ngaphansi kunalokho okungaba yikho uma kusetshenziswa i-nitrogen eningi. Uma umanyolo usetshenziswa ngokweqile, uyachithwa, izitshalo zingasha, futhi intuthu enobuthi ye-nitrogen ikhishwa emvelweni. Abalimi bangafinyelela amazinga afanele omanyolo wokukhula kwezitshalo ngosizo lokuthola izinga le-nitrogen elinembile.

Umbhali-mbhali uLi Yang, uprofesa eSikoleni Sobuhlakani Bokwenziwa eHebei University of Technology yaseShayina, uthe,"Ukukhula kwezitshalo nakho kuthintwa yizinga lokushisa, elithinta izinqubo zomzimba, zamakhemikhali, kanye nezezinto eziphilayo enhlabathini. Ukuqapha okuqhubekayo kuvumela abalimi ukuthi bathuthukise amasu kanye nokungenelela lapho izinga lokushisa lishisa kakhulu noma libanda kakhulu ezitshalweni zabo."

Ngokusho kukaCheng, izindlela zokuzwa ezingathola igesi ye-nitrogen kanye nezilinganiso zokushisa ngaphandle komunye nomunye azibikwa njalo. Kokubili amagesi kanye nokushisa kungabangela ukushintshashintsha kokufundwa kokumelana kwenzwa, okwenza kube nzima ukuhlukanisa phakathi kwazo.

Ithimba likaCheng lidale inzwa esebenza kahle kakhulu engakwazi ukubona ukulahleka kwe-nitrogen ngaphandle kokushisa kwenhlabathi. Inzwa yenziwe nge-vanadium oxide, i-graphene foam ebangelwa yi-laser, futhi kutholakale ukuthi ukufaka i-doping metal complexes ku-graphene kuthuthukisa ukumuncwa kwegesi kanye nokuzwela kokuthola.

Ngenxa yokuthi ulwelwesi oluthambile luvikela inzwa futhi luvimbela ukungena kwegesi ye-nitrogen, inzwa isabela kuphela ezinguqukweni zokushisa. Inzwa ingasetshenziswa ngaphandle kokufakwa kwe-capsulation kanye nokushisa okuphezulu.

Lokhu kuvumela ukulinganiswa okunembile kwegesi ye-nitrogen ngokususa imiphumela yomswakama ohlobene kanye nokushisa kwenhlabathi. Izinga lokushisa kanye negesi ye-nitrogen kungahlukaniswa ngokuphelele futhi kungabi nakuphazamiseka kusetshenziswa izinzwa ezivalekile nezingenazo izivalo.

Umcwaningi uthe ukushintsha kwezinga lokushisa kanye nokukhishwa kwegesi ye-nitrogen kungasetshenziswa ukudala nokusebenzisa amadivayisi amaningi anezindlela zokuzwa ezihlanganisiwe zokulima okunembile kuzo zonke izimo zezulu.

UCheng uthe, “Amandla okuthola ngasikhathi sinye amazinga e-nitrogen oxide aphansi kakhulu kanye nezinguquko ezincane zokushisa kuvula indlela yokuthuthukiswa kwamadivayisi kagesi amaningi esikhathi esizayo anezindlela zokuzwa ezihlanganisiwe zezolimo ezinembile, ukuqapha impilo, kanye nezinye izinhlelo zokusebenza.”

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