Polyethylene terephthalate (PET), seyakakosha thermoplastic polyester, ine gore negore kugadzirwa kwepasirese kunodarika 70 miriyoni matani uye inoshandiswa zvakanyanya mumazuva ese ekudya kurongedza, machira, uye mimwe minda. Nekudaro, kuseri kweiyi hombe yekugadzira vhoriyamu, ingangoita 80% yemarara PET inoraswa zvisina tsarukano kana kuzadzwa ivhu, zvichikonzera kusvibiswa kwezvakatipoteredza uye zvichitungamira mukuraswa kweakawanda kabhoni zviwanikwa. Maitiro ekuzadzisa kudzokororwa kwemarara PET rave dambudziko rakakosha rinoda mabhindauko ebudiriro yepasi rose.
Pakati peiyo iripo tekinoroji yekudzokorodza, tekinoroji yekugadzira mifananidzo yakawana kutariswa kwakanyanya nekuda kwegirinhi uye hunyoro hunhu. Iyi nzira inoshandisa yakachena, isina-kusvibisa simba rezuva sesimba rinotyaira, ichigadzira inoshanda redox mhando munzvimbo pasi petembiricha uye kumanikidza kufambisira kutendeuka uye kukosha-kwakawedzera kusimudzira kwemarara mapurasitiki. Nekudaro, zvigadzirwa zveazvino mafotoreforming maitiro anowanzo kuganhurirwa kune akareruka ane oxygen-ane makomisheni akadai sefomic acid uye glycolic acid.
Munguva pfupi yapfuura, timu yekutsvagisa kubva kuCentre for Photochemical Conversion and Synthesis pane chimwe chikoro muChina chakakurudzira kushandisa tsvina PET uye ammonia secarbon nenitrogen masosi, zvichiteerana, kugadzira formamide kuburikidza nephotocatalytic CN coupling reaction. Kuti izvi zviitike, vaongorori vakagadzira Pt1Au/TiO2 photocatalyst. Muchigadziriso ichi, masayiti e-atomu ePt anosarudza kutora maerekitironi akagadzirwa, ukuwo Au nanoparticles inotora maburi akaitwa mafoto, ichiwedzera kupatsanurwa uye kutamisa kushanda kwemafotogenerated electron-hole pairs, nekudaro inowedzera photocatalytic chiitiko. Mwero wekugadzira formamide wakasvika pa7.1 mmol gcat⁻¹ h⁻¹. Zviyedzo zvakaita se-in-situ infrared spectroscopy uye electron paramagnetic resonance yakaratidza radical-mediated reaction nzira: maburi mapikicha panguva imwe chete oxidize ethylene glycol uye ammonia, ichigadzira aldehyde yepakati uye amino radicals (·NH₂), iyo inoenda kuCN coupling kuti pakupedzisira iite. Iri basa harisi chete rinopayona nzira itsva yekushandurwa kwepamusoro-kukosha kwemarara epurasitiki, kuwedzera huwandu hwePET kusimudzira zvigadzirwa, asiwo inopa yakasvibira, yakawedzera hupfumi, uye inovimbisa nzira yekugadzira yekugadzira yakakosha nitrogen-ine makomisheni akadai semishonga nemishonga yezvipembenene.
Izvo zvinoenderana netsvagiridzo zvakawanikwa zvakaburitswa muAngewandte Chemie International Edition pasi pemusoro wekuti "Photocatalytic Formamide Synthesis kubva kuPlastiki Waste uye Ammonia kuburikidza neCN Bond Construction Under Mild Conditions". Tsvagiridzo iyi yakawana mari kubva kumapurojekiti anotsigirwa neNational Natural Science Foundation yeChina, iyo Joint Laboratory Fund yeNovel Materials pakati peChinese Academy yeSainzi neYunivhesiti yeHong Kong, pakati pemamwe masosi.
Nguva yekutumira: Sep-26-2025