Polyethylene terephthalate (PET), dịka polyester thermoplastic dị mkpa, nwere mmepụta zuru ụwa ọnụ kwa afọ karịrị tọn 70 nde ma a na-ejikarị ya eme ihe n'ọtụtụ ebe na nkwakọ ngwaahịa nri kwa ụbọchị, ákwà, na ubi ndị ọzọ. Agbanyeghị, n'azụ nnukwu mmepụta a, ihe dị ka 80% nke ihe mkpofu PET ka a na-atụfu ma ọ bụ jupụta n'ala n'enweghị ihe mgbochi, na-akpata nnukwu mmetọ gburugburu ebe obibi ma na-eduga na mfu nke nnukwu akụrụngwa carbon. Otu esi enweta imegharị ihe mkpofu PET aghọwo ihe ịma aka dị oke mkpa nke chọrọ ọganihu maka mmepe na-adigide zuru ụwa ọnụ.
N'ime teknụzụ ndị e ji emegharị ihe dị ugbu a, teknụzụ fotoreforming enwetawo nlebara anya dị ukwuu n'ihi àgwà ya dị ndụ na nke dị nro. Usoro a na-eji ike anyanwụ dị ọcha, nke na-anaghị emerụ emerụ dị ka ike na-akpali, na-emepụta ụdị redox na-arụ ọrụ na ọnọdụ n'okpuru okpomọkụ na nrụgide gburugburu iji mee ka mgbanwe na nkwalite uru nke plastik mkpofu dị mfe. Agbanyeghị, ngwaahịa nke usoro photoreforming ugbu a na-abụkarị naanị na ngwakọta dị mfe nwere oxygen dị ka formic acid na glycolic acid.
N'oge na-adịbeghị anya, otu ndị nyocha sitere na Center for Photochemical Conversion and Synthesis na ụlọ ọrụ dị na China tụrụ aro iji ihe mkpofu PET na ammonia dị ka isi iyi carbon na nitrogen, n'otu n'otu, mepụta formamide site na mmeghachi omume njikọ CN photocatalytic. Iji mezuo nke a, ndị nchọpụta chepụtara Pt1Au/TiO2 photocatalyst. N'ime ihe mkpali a, ebe otu atọm Pt na-ejide elektrọn photogenerated n'ụzọ na-ahọrọ, ebe Au nanoparticles na-ejide oghere photogenerated, na-eme ka nkewa na mbufe nke ụzọ abụọ electron-hole photogenerated dịkwuo mma, si otú a na-eme ka ọrụ photocatalytic dịkwuo elu. Ọnụego mmepụta formamide ruru ihe dị ka 7.1 mmol gcat⁻¹ h⁻¹. Nnwale dị ka infrared spectroscopy na electron paramagnetic resonance kpughere ụzọ mmeghachi omume radical-mediated: oghere photogenerated na-eme ka ethylene glycol na ammonia dị n'otu oge, na-emepụta aldehyde intermediates na amino radicals (·NH₂), nke na-agafe njikọ CN iji mepụta formamide. Ọrụ a abụghị naanị na ọ na-amalite ụzọ ọhụrụ maka mgbanwe dị elu nke plastik mkpofu, na-eme ka ngwaahịa PET dịkwuo mma, kamakwa ọ na-enye atụmatụ mmepụta ihe dị mma, nke bara uru karị, ma na-ekwe nkwa maka mmepụta nke ihe ndị dị mkpa nwere nitrogen dị ka ọgwụ na ọgwụ nje.
E bipụtara nchọpụta ndị metụtara ya na mbipụta Angewandte Chemie International Edition n'okpuru aha "Njikọ Photocatalytic Formamide site na mkpofu plastik na Amonia site na CN Bond Construction Under Mild Conditions". Nnyocha ahụ nwetara ego site na ọrụ ndị National Natural Science Foundation nke China kwadoro, Joint Laboratory Fund for Novel Materials n'etiti Chinese Academy of Sciences na The University of Hong Kong, tinyere ebe ndị ọzọ.
Oge ozi: Sep-26-2025