Ko te Polyethylene terephthalate (PET), he polyester thermoplastic nui, he nui ake i te 70 miriona tana te nui o te hanga o te ao i ia tau, ā, e whakamahia whānuitia ana i roto i ngā takai kai o ia rā, i ngā kakahu, me ētahi atu mara. Heoi, i muri i tēnei nui o te hanga, tata ki te 80% o ngā para PET e maka noatia ana, e tukuna ana rānei ki te whenua, ka nui te parahanga o te taiao, ā, ka nui hoki te maumau o ngā rauemi waro. Me pēhea te hangarua i ngā para kua riro te PET hei wero nui e hiahia ana kia puta he whanaketanga pumau mō te ao.
I roto i ngā hangarau hangarua o nāianei, kua aro nuihia te hangarau whakaahua-whakahou nā ōna āhuatanga matomato me te ngawari. Ka whakamahia e tēnei tikanga te pūngao o te rā ma, kore-whakapoke hei kaha akiaki, ka whakaputa i ngā momo redox hohe i raro i te pāmahana me te pēhanga taiao hei whakahaere i te huringa me te whakapai ake i te uara o ngā kirihou para. Heoi, ko ngā hua o ngā tukanga whakaahua-whakahou o nāianei he iti noa iho ki ngā matū kei roto te hāora pērā i te waikawa formic me te waikawa glycolic.
Nō nā tata nei, i whakaarohia e tētahi rōpū rangahau mai i te Pokapū mō te Huringa me te Hanganga Matū Whakaahua i tētahi whare wānanga i Haina te whakamahi i ngā para PET me te haukini hei pūtake waro me te hauota, hei whakaputa formamide mā te tauhohenga hononga CN whakaahua-whakakorikori. Hei whakatutuki i tēnei, i hangaia e ngā kairangahau he kaiwhakakorikori whakaahua Pt1Au/TiO2. I roto i tēnei kaiwhakakorikori, ka hopu kōwhiria e ngā pae Pt ngota kotahi ngā irahiko whakaahua-whakaputa, ko ngā matūriki nano Au ka hopu i ngā kōhao whakaahua-whakaputa, ka whakarei ake i te wehenga me te whai huatanga whakawhiti o ngā takirua irahiko-kōhao whakaahua-whakaputa, ā, ka whakanui ake i te mahi whakaahua-whakakorikori. I eke te tere whakaputa formamide ki te 7.1 mmol gcat⁻¹ h⁻¹. I whakaatuhia e ngā whakamātautau pēnei i te inenga infrared in-situ me te irahiko paramagnetic resonance he ara tauhohenga e whakahaerehia ana e te radical: ka whakakōkōhia ngā kōhao whakaahua-whakaputa i te ethylene glycol me te haukini i te wā kotahi, ka whakaputa i ngā takawaenga aldehyde me ngā amino radical (·NH₂), ka uru ki te hononga CN hei hanga formamide. Ehara i te mea ko tēnei mahi anake te arahi i tētahi ara hou mō te hurihanga uara nui o ngā kirihou para, me te whakarei ake i te whānuitanga o ngā hua whakapai ake PET, engari ka whakarato hoki i tētahi rautaki hangai matomato ake, ohanga ake, me te whai hua ake mō te whakaputa i ngā matū nui kei roto he hauota pērā i ngā rongoā me ngā patupatu.
I whakaputaina ngā kitenga rangahau e pā ana ki roto i te Angewandte Chemie International Edition i raro i te taitara "Photocatalytic Formamide Synthesis from Plastic Waste and Ammonia via CN Bond Construction Under Mild Conditions". I whiwhi pūtea te rangahau mai i ngā kaupapa i tautokona e te National Natural Science Foundation of China, te Joint Laboratory Fund for Novel Materials between Chinese Academy of Sciences and The University of Hong Kong, me ētahi atu puna.
Wā tuku: Hepetema-26-2025