Newswise – Mitu ma ube medere pi piny ma tiyo ku yamo ma tek pi medo kero pa piny ubemedere ni medo wel pa yamo ma rac (CO2) i yamu. Kadok jubetimo kero ni jwigo CO2 ma wok kud i polo, ento eni jwigo ngo adwogi marac pa yamu ma dong utiye i yamu. Pieno ju ma timo sayusac wok ku yore manyen mi tic ku CO2 ma nwang i yamu ni loko ni piny ma pire tek calu formic acid (HCOOH) man methanol. Photoreduction pa CO2 ku tic ku photocatalysts ma tiyo ku lero ma nen calu catalyst ubedo yore ma dhanu zo maru pi loko piny ma kumeno.
I lembe manyen ma jutimo, ma juwodho i nindo 8, mi dwi mir abic, 2023, Angewandte Chemie, Japonji Kazuhiko Maeda ku jutic pare mi sayu lembe i Tokyo Institute of Technology gitimo adwogi maber. Gi timo tic maber ku tin (Sn) metal-organic framework (MOF) ma konyo tic pa CO2. MOF ma nyen ma jukelo julwongo KGF-10 man formula pare utiye [SnII2(H3ttc)2.MeOH]n (H3ttc: trithiocyanuric acid, MeOH: methanol). Ni tiyo ku ler ma nen, KGF-10 loko CO2 ni formic acid (HCOOH). Japonji Maeda onyutho kumae, "Nitundu kawoni, juyubu jam tic madwong ma tiyo maber pi dwoko piny CO2 ma wok kud i cuma ma nen ungo man ma pire tek. Ento, ketho tic mi mako lero man tic mi dwoko piny i dul acel ma juketho i iye cuma madwong podi utiye lembe matek." Pieno, Sn unyutho nia etiye ngati maber mi loyo peko ario eni.
MOFs, ma gicokiri ku bero pa cuma man piny ma kwo, jubeyenyo gi ni bedo yore mukende maber pa photocatalysts macon ma juyubu ku cuma ma nwangre ungo. Sn, ma jung'eyo pi tic pare ario calu jatel wi tic man jam maku lero i tic mi photocatalyst, ecopu bedu yore maber pi MOF-based photocatalysts. Kadi bende MOFs ma juyubu ku zirconium, iron, man lead judaru somo lee, nyang ikum Sn-based MOFs podi nok. Somo mukende man somo mitire pi ni nyang ikum copo man tic pa Sn-based MOFs i thenge mi photocatalysis.
Mi yubu tin-based MOF KGF-10, ju ma timo sayusac gitiyo ku H3ttc (trithiocyanuric acid), MeOH (methanol), man tin chloride calu piny ma jucaku kudu. Giyero 1,3-dimethyl-2-phenyl-2,3-dihydro-1H-benzo[d]imidazole calu electron donor man hydrogen source. I ngei yubu, KGF-10 ma ju nwango jutimo ku yore matung tung mi ngiyo. Tembe eni unyutho nia piny eni utiye ku kero mi mako CO2 ma rwom pare lapiny ku band gap pa 2.5 eV man mako maber in wavelength ma nen.
Ku ngec mi kite ma piny manyen ne nen kudu, ju ma gisomo lembe mi ngec gi tiyo kudu pi dwoko piny pa carbon dioxide ku lero ma nen. Ma pire tek, ju ma timo sayusac ginwangu niya KGF-10 loko CO2 ni formate (HCOO-) ku 99% mi selectivity manangu epe ku kony pa photosensitizer nyo catalyst. Mi medo, KGF-10 unyutho rwom ma malu pa quantum yield - pima pa tic ku photons - ma utuc i wel pa 9.8% i 400 nm. Ma pire tek, lembe ma jutimo i saa mi photocatalytic reaction unyutho nia KGF-10 timo aloka loka mi yik pare pi konyo i dwoko piny.
Lembe maeni ma nyen nyuthu tic maber pa tin-based photocatalyst KGF-10 ma epe ku yeny pa noble metals calu catalyst acel kende pi dwoko piny CO2 ni bedo ku lero ma nen. Kit maber pa KGF-10 ma junyutho i somo eni copo loko tic pare calu photocatalyst i tic matung tung, ikinde dwoko piny CO2 pa ceng. Japonji Maeda uketho: "Adwogi mwa nyutho nia MOFs copo bedu ni kabedo mi dongo pa kero mi photocatalytic maber akeca ni tiyo ku cuma ma rac ungo, ma wel pare yot man ma dwong ma nwangre iwi ngom, ma pol kare gibedo cuma ma nyai. Unattainable." Nwangu eni oyabo yore manyen. lembe manyen i thenge mi photocatalysis man eyabu yo pi tic maber man maber pa piny ma iwi ngom.
Newswise miyo ju goro lembe kare mi nwangu lembe manyen man kabedo ni yunivasiti, kabedo man ju goro lembe ni poko lembe manyen ni juwinj migi.