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Kuzumanana kwakuyanda mafuta aajisi kaboni manji kwapa kuti kube kuyungizigwa kwa kaboni dayokisayidi (CO2) mumulengalenga. Nikuba kuti kusoleka kuchitwa kuchesya muya uutegwa carbon dioxide, takuzulide kuchincha ntenda zya muya uuli kale mumulengalenga.
Aboobo basayaansi bakapanga nzila zyakubelesya muya uutegwa carbon dioxide uuli kale mumulengalenga kwiinda mukuusandula kuba ma molecule aagwasya mbuli formic acid (HCOOH) a methanol. Kugwisya mumuni wa carbon dioxide kubelesya mumuni uulibonya ninzila iibelesyegwa kapati mukusanduka kuliboobu.
Kabunga kabasayaansi kuzwa ku Tokyo Institute of Technology, kabasololelwa a Professor Kazuhiko Maeda, bakachita kuyaambele kupati mpawo bakalemba mubbuku lyanyika yoonse lya "Angewandte Chemie" lyakalembwa mu May 8, 2023.
Bakapanga nzila yakupanga zintu zipangidwe aamatini (MOF) iikonzya kugwasya kugwisya mumuni uutegwa carbon dioxide. Basikuvwuntauzya bakapanga MOF mpya iijisi tin (Sn) a fomuyula ya [SnII2(H3ttc)2.MeOH]n (H3ttc: trithiocyanuric acid a MeOH: methanol).
Bunji bwama CO2 photocatalysts abelesya mumuni uuboneka kabotu abelesya nsimbi ziyandisi zitayandiki kapati mbuli zibeela zyabo zipati. Kwiindawo, kuswaangana kwakutola mumuni antoomwe amilimo yakugwasya kuti kube chintu chomwe chili amweelwe mupati wazibulo nchintu chiyumu loko. Aboobo, Sn ninzila mbotu nkaambo ilakonzya kumanizya mapenzi woonse.
Ma MOF nzintu zibotu kapati zyakupanga zintu zyabutale azintu zipona, mpawo ma MOF alikuyiigwa mbuli nzila imwi iitakwe busani kwiinda zintu zyakale zya rare earth photocatalysts.
Sn ninzila iikonzya kubelesegwa ku MOF-based photocatalysts nkaambo ilakonzya kubeleka mbuli catalyst a scavenger muchiindi cha photocatalytic process. Nikuba kuti lead, iron, antoomwe a zirconium-based MOFs zyakavwuntauzyigwa loko, mbichani chizibinkene aatala a tin-based MOFs.
H3ttc, MeOH antoomwe a tin chloride zyakabelesegwa mbuli zintu zyakutalisya kubamba tin-based MOF KGF-10, mpawo basikuvwuntauzya bakayeeya kubelesya 1,3-dimethyl-2-phenyl-2,3-dihydro-1H-benzo[d]imidazole. ibelekela mbuli sikupa ma electron mpawo uupa haayidirojeni.
KGF-10 yakazwa mpawo ilabikkwa munzila zyiingi zyakuvwuntauzya. Bakajana kuti eechi chintu chili abwaanda bwa 2.5 eV, chikonzya kuyoya mumuni uulibonya, mpawo chilijisi nguzu zyakuyobola muya uutegwa carbon dioxide.
Basayaansi nibakamana kumvwisisisya bube bwachintu eechi chipya, bakachibelesya kugwasya kucheya kwa carbon dioxide mumumuni uulibonya. Bakajana kuti KGF-10 ilakonzya kusandula CO2 kuba formate (HCOO–) kusikila ku 99% kakunyina kuyandika zimwi zintu zigwasya mumuni.
Alimwi ilijisi mweelwe mupati wa quantum yield (mweelwe wama electrons aajatikizyidwe mukusanduka kuli mweelwe woonse wama photons) wa 9.8% a wavelength ya 400 nm. Kwiindawo, kuvwuntauzya kwabupange kwakachitwa muchiindi choonse chakusanduka kwakatondezya kuti KGF-10 yakachinchwa mubupange bwakasumpula kucheya kwa photocatalytic.
Ooku kuvwuntauzya kwatondezya mchiindi chakusanguna chintu chibeleka obotu, chibeela chomwe, chitakwe nsimbi ziyandisi chili atini-based photocatalyst kuti chifwambaanye kusanduka kwa carbon dioxide kuba formate. Bube bugambya bwa KGF-10 bwakajanwa akabunga bwakajalula nzila zipya zyakubelesya mbuli chintu chipa kuti kube mumuni munzila zilimbuli kuchesya kuzwa kwa CO2 kubelesya nguzu zyazuba.
Mufundisi Maeda wakamaninizya: "Zyakajanwa kulindiswe zitondezya kuti ma MOF alakonzya kubeleka mbuli nzila yakubelesya zintu zitakwe tombe, zitayandiki mali manji, alimwi zijisi nyika kupanga milimo mibotu ya photocatalytic eeyo iitakonzyi kujanwa kwiinda mukubelesya zintu zipangidwe aama molecule."
Kamakura Y abamwi (2023) Tin(II)-based metal-organic frameworks ilagwasya kuchita obotu akusala kucesya kwa carbon dioxide kusikila kukupanga mumuni uubonwa. Applied Chemistry, International Edition. doi:10.1002/ani.202305923
Mukubuzya-buzya ooku, Dr. Stuart Wright, Syaazibwene Mupati ku Gatan/EDAX, wabandika a AZoMaterials aatala akubelesya kwa electron backscatter diffraction (EBSD) musayensi yazibelesyo azyakupanga.
Mukubuzyigwa-buzyigwa ooku, AZoM yabandika myaka iili 30 yaluzibo lwa Avantes mu spectroscopy, mulimo wabo alimwi abuumi bwakumbele bwazintu nzyobapanga antoomwe a Mupati wazyintu zya Avantes Ger Loop.
Mukubuzya-buzya ooku, AZoM waambuula a LECO's Andrew Storey aatala a glow discharge spectroscopy anguzu zipegwa a LECO GDS950.
Makkamera aa ClearView® aabeleka kabotu kapati alasumpula mulimo wa routine transmission electron microscopy (TEM).
XRF Scientific Orbis Laboratory Jaw Crusher ninzila zyobile zyakutyolaula eezyo zikonzya kuchesya mweelwe wachitondezyo kusika ku 55 ziindi zyakusaanguna.
Amwiiye aatala a Bruer's Hysitron PI 89 SEM picoindenter, picoindenter yachiindi chilamfu yakuvwuntauzya kwa nanomechanical.
Musika wanyika yoonse wama semiconductor wanjila muchiindi chibotu. Kuyandika kwatunsiyansiya twama chip kwasololela akulesya makwebo, mpawo kubula kwama chip kwalino kulalangilwa kuzumanana kwachiindi chilamfu. Zyintu ziliwo lino zilakonzya kuchincha buumi bwakumbele bwamakwebo, mpawo eezi ziyoozumanana kuchitika.
Kusiyana kupati aakati kamabbattery aa graphene amabbattery aa solid-state mbupange bwa electrode imwi aimwi. Nikuba kuti katodi kanjikanji ilachinchululwa, ma allotrope aa kaboni alakonzya kubelesegwa kupanga ma anode.
Muminyaka misyoonto yainda, Intaneti yazintu yakanjizigwa mumakwebo woonse, asi ilayandika kapati mumakwebo aamyootokala yamagesi.