Polyethylene terephthalate (PET), uas yog ib qho tseem ceeb thermoplastic polyester, muaj ib xyoos ib zaug thoob ntiaj teb ntau tshaj 70 lab tons thiab yog dav siv nyob rau hauv niaj hnub ntim zaub mov, textiles, thiab lwm yam teb. Txawm li cas los xij, tom qab qhov ntim ntau lawm, kwv yees li 80% ntawm PET pov tseg tau muab pov tseg tsis tu ncua lossis pov tseg, ua rau muaj kuab paug ib puag ncig hnyav thiab ua rau pov tseg cov pa roj carbon ntau. Yuav ua li cas kom ua tiav cov khoom pov tseg PET tau dhau los ua ib qho kev sib tw tseem ceeb uas yuav tsum tau muaj kev cuam tshuam rau kev txhim kho thoob ntiaj teb kom ruaj khov.
Ntawm cov cuab yeej siv tshiab uas twb muaj lawm, photoreforming thev naus laus zis tau txais kev saib xyuas tseem ceeb vim nws cov yam ntxwv ntsuab thiab me me. Cov txheej txheem no siv lub hnub ci huv, tsis muaj kuab paug rau lub zog ua lub zog tsav, tsim cov kab mob redox nyob rau hauv qhov chaw nyob rau hauv qhov kub thiab txias los pab txhawb kev hloov dua siab tshiab thiab muaj nuj nqis ntxiv ntawm cov khoom pov tseg. Txawm li cas los xij, cov khoom ntawm cov txheej txheem photoreforming tam sim no feem ntau txwv rau cov pa oxygen yooj yim xws li formic acid thiab glycolic acid.
Tsis ntev los no, ib pab neeg tshawb fawb los ntawm Lub Chaw rau Photochemical Conversion thiab Synthesis ntawm ib lub koom haum nyob rau hauv Tuam Tshoj tau npaj siv pov tseg PET thiab ammonia raws li carbon thiab nitrogen qhov chaw, raws li, los tsim formamide ntawm ib tug photocatalytic CN coupling cov tshuaj tiv thaiv. Txog qhov kawg no, cov kws tshawb fawb tau tsim Pt1Au/TiO2 photocatalyst. Nyob rau hauv no catalyst, ib leeg-atom Pt chaw xaiv ntes photogenerated electrons, thaum Au nanoparticles ntes photogenerated qhov, ho txhim khu kev sib cais thiab hloov efficiency ntawm photogenerated electron-qhov khub, yog li boosting photocatalytic kev ua si. Tus nqi tsim tawm formamide mus txog kwv yees li 7.1 mmol gcat⁻¹ h⁻¹. Kev sim xws li hauv-situ infrared spectroscopy thiab electron paramagnetic resonance tau nthuav tawm txoj hauv kev radical-mediated cov tshuaj tiv thaiv: photogenerated qhov ib txhij oxidize ethylene glycol thiab ammonia, tsim aldehyde intermediates thiab amino radicals (·NH₂), uas dhau los ntawm CN coupamide rau qhov kawg. Qhov kev ua haujlwm no tsis yog tsuas yog pioneer txoj hauv kev tshiab rau kev hloov pauv ntawm cov khoom pov tseg uas muaj txiaj ntsig zoo, ua kom muaj txiaj ntsig zoo ntawm PET cov khoom lag luam txhim kho, tab sis kuj tseem muab lub zog ntsuab, kev lag luam ntau dua, thiab cog lus zoo rau kev tsim cov khoom tseem ceeb uas muaj nitrogen xws li tshuaj thiab tshuaj tua kab.
Cov kev tshawb fawb txog kev tshawb fawb tau luam tawm nyob rau hauv Angewandte Chemie International Edition nyob rau hauv lub npe "Photocatalytic Formamide Synthesis los ntawm Plastic Khib thiab Ammonia los ntawm CN Bond Kev Tsim Kho Hauv Me Me". Cov kev tshawb fawb tau txais nyiaj txiag los ntawm cov haujlwm txhawb nqa los ntawm National Natural Science Foundation ntawm Tuam Tshoj, Lub Tsev Haujlwm Saib Xyuas Kev Ruaj Ntseg Sib Koom rau Cov Khoom Siv Tshiab ntawm Suav Academy ntawm Sciences thiab University of Hong Kong, ntawm lwm qhov chaw.
Post lub sij hawm: Sep-26-2025