Formamide: Ụlọ ọrụ nyocha na-atụ aro imezigharị ihe mkpofu PET Plastic iji mepụta Formamide

Polyethylene terephthalate (PET), dị ka polyester thermoplastic dị mkpa, nwere mmepụta zuru ụwa ọnụ kwa afọ karịa nde tọn 70, a na-ejikwa ya na nkwakọ nri kwa ụbọchị, akwa akwa na mpaghara ndị ọzọ. Agbanyeghị, n'azụ oke mmepụta a, ihe dị ka 80% nke PET mkpofu ka a na-atụfu ya n'enweghị oke ma ọ bụ kpochie ya, na-ebute mmetọ gburugburu ebe obibi siri ike ma na-eduga n'itufu nnukwu akụ carbon. Otu esi enweta nzigharị nke ihe mkpofu PET abụrụla ihe ịma aka siri ike na-achọ ọganihu maka mmepe zuru ụwa ọnụ.

N'ime teknụzụ imegharị ihe dị ugbu a, teknụzụ photoreforming enwetala nlebara anya dị ukwuu n'ihi njirimara akwụkwọ ndụ akwụkwọ ndụ na nke dị nro. Usoro a na-eji ike anyanwụ dị ọcha, nke na-adịghị emetọ emetọ dị ka ike na-anya ụgbọ ala, na-emepụta ụdị redox na-arụ ọrụ na ọnọdụ n'okpuru ọnọdụ okpomọkụ na nrụgide iji kwado ntughari na agbakwunyere uru nke plastik mkpofu. Otú ọ dị, ngwaahịa nke usoro nhazi foto ugbu a na-ejedebe na ogige dị mfe nke 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 akwụkwọ dị na China tụrụ aro iji ihe mkpofu PET na amonia dị ka isi iyi carbon na nitrogen, n'otu n'otu, iji mepụta formamide site na mmeghachi omume njikọta fotocatalytic CN. Iji mezuo nke a, ndị nchọpụta haziri Pt1Au/TiO2 photocatalyst. Na nke a na-akpalite, otu-atom Pt saịtị na-ahọrọ weghara photogenerated eletrọn, ebe Au nanoparticles na-ejide photogenerated oghere, budata na-eme ka nkewa na mbufe arụmọrụ nke photogenerated electron-hole ụzọ abụọ, si otú na-akwalite photocatalytic ọrụ. Ọnụego mmepụta foramide ruru ihe dịka 7.1 mmol gcat⁻¹ h⁻¹. Nnwale dị ka in-situ infrared spectroscopy na electron paramagnetic resonance kpugheere ụzọ mmeghachi omume nke na-eme mgbanwe: oghere ndị a na-emepụta n'otu oge oxidize ethylene glycol na amonia, na-emepụta aldehyde intermediates na amino radicals (·NH₂), nke na-enweta njikọ CN iji mepụta n'ikpeazụ. Ọrụ a abụghị naanị na ọ bụ ụzọ ọhụrụ maka ngbanwe dị elu nke plastik mkpofu, na-eme ka ụdị ngwaahịa nkwalite PET dịkwuo elu, ma na-enyekwa usoro ndụ ndụ ndụ, nke dị oke ọnụ ahịa, na nke na-ekwe nkwa maka mmepụta ihe dị mkpa nke nwere nitrogen dị ka ọgwụ na pesticides.

E bipụtara nchoputa nyocha metụtara ya na Angewandte Chemie International Edition n'okpuru aha "Photocatalytic Formamide Synthesis si Plastic Waste na Amonia site na CN Bond Construction Under Mild Conditions". Nchoputa a nwetara ego site na oru ngo nke 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, n'etiti isi mmalite ndi ozo.