Formamide Institute Ikigo cyubushakashatsi gitanga ifoto yerekana imyanda ya PET Plastike kugirango itange Formamide

Polyethylene terephthalate (PET), nka polyester ikomeye ya thermoplastique, ifite umusaruro wumwaka ku isi urenga toni miliyoni 70 kandi ikoreshwa cyane mubipfunyika ibiryo bya buri munsi, imyenda, nibindi bice. Nyamara, inyuma yibi bicuruzwa byinshi, hafi 80% y’imyanda PET yajugunywe mu buryo butarobanuye cyangwa yandujwe imyanda, itera umwanda ukabije w’ibidukikije kandi biganisha ku gutakaza umutungo kamere wa karubone. Uburyo bwo kugera ku gutunganya imyanda PET yabaye ikibazo gikomeye gisaba intambwe igamije iterambere rirambye ku isi.

Muri tekinoroji isanzwe ikoreshwa, tekinoroji yo gufotora yitabiriwe cyane kubera icyatsi cyayo nicyoroheje. Ubu buhanga bukoresha ingufu zituruka ku mirasire y'izuba zisukuye, zidahumanya nk'ingufu zitwara, zitanga ubwoko bwa redox bukora ahantu h’ubushyuhe bw’ibidukikije ndetse n’umuvuduko kugira ngo byoroherezwe guhindura no kongera agaciro ka plastiki y’imyanda. Nyamara, ibicuruzwa byuburyo bugezweho bwo gufotora bigarukira gusa kubintu byoroshye birimo ogisijeni irimo aside aside na glycolike.

Vuba aha, itsinda ry’ubushakashatsi ryaturutse mu Kigo gishinzwe Guhindura Photochemiki na Synthesis mu kigo cy’Ubushinwa cyatanze igitekerezo cyo gukoresha imyanda PET na amoniya nka karubone na azote, kugira ngo ikore formamide ikoresheje ifoto ya CN ifotora. Kugira ngo ibyo bishoboke, abashakashatsi bakoze fotokateri ya Pt1Au / TiO2. Muri iyi catalizator, imbuga imwe ya atom Pt ihitamo gufata electroni zifotora, mugihe Au nanoparticles ifata umwobo wafotowe, byongera cyane gutandukanya no guhererekanya imikorere ya elegitoroniki-mwobo ifatanye, bityo bikazamura ibikorwa bya fotokatike. Igipimo cya formamide cyageze kuri 7.1 mmol gcat⁻¹ h⁻¹. Ubushakashatsi nka in-situ infrared spekitroscopi na electron paramagnetic resonance bwerekanye inzira yo gukemura ibibazo: inzira ya fotogène icyarimwe ihindura okiside etylene glycol na ammonia, ikabyara aldehyde abahuza na radical radical amino (· NH₂), ikabangikanya na CN kugirango amaherezo ibe formamide. Uyu murimo ntabwo utangiza inzira nshya yo guhindura agaciro gakomeye ka plastiki y’imyanda, ukungahaza ibintu byinshi byo kuzamura PET, ariko kandi utanga ingamba zifatika zicyatsi, zifite ubukungu, kandi zitanga ikizere cyo gukora ibibyingenzi birimo azote nka farumasi n’imiti yica udukoko.

Ubushakashatsi bujyanye n’ubushakashatsi bwasohotse muri Angewandte Chemie International Edition ku mutwe wa “Synthesis ya Photocatalytic Formamide Synthesis iva mu myanda ya plastiki na Amoniya ikoresheje CN Bond yubatswe mu bihe byoroheje”. Ubushakashatsi bwakiriye inkunga y’imishinga yatewe inkunga na Fondasiyo y’ubumenyi y’ubumenyi y’igihugu y’Ubushinwa, Ikigega cya Laboratoire ihuriweho n’ibikoresho bishya hagati y’ishuri ry’ubumenyi ry’Ubushinwa na kaminuza ya Hong Kong, hamwe n’andi masoko.