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Say tuloytuloy ya pankaukolan na ekonomya parad high-carbon fuels so sengegan na idarakel na carbon dioxide (CO2) ed atmospera. Anggano gagawaen iray sagpot pian nabawasan so carbon dioxide emissions, aliwan magenap iratan pian nauman so makaderal ya epekto na gas ya wala lad atmospera.
Kanian saray sientista et nanggawa na makapalikdon paraan pian nausar so carbon dioxide ya wala lad atmospera diad panguman ed satan pian magmaliw ya mausar iran molekula a singa say formic acid (HCOOH) tan methanol. Say photocatalytic photoreduction na carbon dioxide ya uusaren so nanengneng a liwawa et sakey a kaslakan a paraan parad ontan iran pananguman.
Sakey a grupo na saray sientista manlapud Tokyo Institute of Technology, ya indaulo nen Propesor Kazuhiko Maeda, so akagawa na baleg ya inyaligwas tan indokumento da itan ed internasyonal a publikasyon ya “Angewandte Chemie” ya apetsaan na Mayo 8, 2023.
Nanggawa ra na tin-based metal-organic framework (MOF) ya makatulong ed selective photoreduction na carbon dioxide. Saray researcher et nanggawa na balon lata (Sn)-based MOF ya walay pormula na kemikal ya [SnII2(H3ttc)2.MeOH]n (H3ttc: trithiocyanuric acid tan MeOH: methanol).
Maslak ed saray epektibon nanengneng a liwawa ya CO2 photocatalysts et manguusar na matalag iran mabmablin metal bilang manunan kabiangan da. Niarum ni, say pankasakey na light absorption tan catalytic functions ed saksakey a molecular unit ya tugyopen na dakel a metal et mansiansian abayag lan angat. Kanian, say Sn so sankaabigan ya kandidato lapud sarag ton solbaren so duaran problema.
Saray MOF so sankaabigan ya materyales parad metal tan organikon materyales, tan saray MOF et aaralen bilang mas berde ya alternatibo ed tradisyonal iran rare earth photocatalysts.
Say Sn et posiblin pilien parad MOF-based photocatalysts lapud nayarin onkiwas bilang catalyst tan scavenger legan na proseso na photocatalytic. Anggaman say lead, iron, tan zirconium-based MOFs et malaknab lan inaral, daiset so amta nipaakar ed tin-based MOFs.
Say H3ttc, MeOH tan tin chloride so inusar bilang gapoan ya ingredients pian iparaan so tin-based MOF KGF-10, tan nandesisyon iray researcher ya mangusar na 1,3-dimethyl-2-phenyl-2,3-dihydro-1H-benzo[d]imidazole. manserbin electron donor tan lapuan na hydrogen.
Say resulta na KGF-10 et ipaarap ed nanduruman proseso na panagsukimat. Nalmoan dan say materyal et walaan na bandgap ya 2.5 eV, makasesepsep na nanengneng iran wavelength na liwawa, tan walaan na moderate ya kapasidad ya makasesep na carbon dioxide.
Nen atalosan la na saray sientista so pisikal tan kemikal iran kablian na sayan balon materyal, inusar da itan pian napaaligwas so pambawas na carbon dioxide diad kiwawala na nanengneng a liwawa. Nalmoan dan say KGF-10 et sarag ton epektibo tan mapilin i-convert so CO2 ed formate (HCOO–) ya anggad 99% ya epektibo ya agla kaukolan so kaaruman ya photosensitizers o catalysts.
Wala met so rekord ton atagey ya apparent quantum yield (say ratio na bilang na saray electron ya nalalanor ed reaksion ed dagup na bilang na saray insidenten photon) ya 9.8% ed wavelength ya 400 nm. Sakey ni, say structural analysis ya ginawa legan na reaksion et angipatnag ya say KGF-10 et dinmalan ed structural modifications ya amawala na photocatalytic reduction.
Sayan impanaral so mangipaparungtal ed primeron pankanawnawa na sakey ya epektibon tuloy, saksakey a kabiangan, anggapoy mablin metal ya tin-based ya photocatalyst pian napapeles so panguman na carbon dioxide ya magmaliw ya formate. Say makapadinayew iran kablian na KGF-10 ya adiskobre na grupo so mangilukas na balon posibilidad parad pangusar ed satan bilang photocatalyst ed saray proseso a singa say pambawas na CO2 emissions ya uusaren so solar energy.
Oniay konklusyon nen Propesor Maeda: “Ipapanengneng na saray resulta mi ya saray MOF et nayarin manserbin plataporma parad pangusar na saray metal ya aliwan makasamal, abeban gastos, tan mayaman ed dalin pian makagawa na superyor iran photocatalytic functions ya kaslakan ya ag nagawaan no mangusar na molecular metal complexes.”
Kamakura Y et al (2023) Tin(II)-based metal-organic frameworks so mamapawala na epektibo tan mapilin pambawas na carbon dioxide ed pakaporma ed silong na nanengneng a liwawa. Applied Chemistry, International Edition. doi:10.1002/ani.202305923
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