Cov kws tshawb fawb tau tsim ib txoj hauv kev siv lasers txhawm rau txhawm rau molecules ntawm cov yas thiab lwm yam khoom siv rau hauv lawv qhov tsawg tshaj plaws rau kev rov siv dua yav tom ntej, lawv tshaj tawm hnub no.
Txoj kev yuav muab cov ntaub ntawv no tso rau saum cov khoom siv ob sab hu ua kev hloov hlau dichalcogenides thiab tom qab ntawd irradiating lawv nrog lub teeb.
Qhov kev tshawb pom muaj peev xwm los txhim kho txoj hauv kev uas peb tam sim no cuam tshuam nrog cov yas uas nyuaj rau decompose. Cov kev tshawb pom tau luam tawm nyob rau hauv phau ntawv Journal Nature Communications.
"Los ntawm kev siv cov tshuaj tiv thaiv tshwj xeeb no, peb tuaj yeem tshawb nrhiav txoj hauv kev tshiab los hloov cov pa phem ib puag ncig rau hauv cov tshuaj muaj txiaj ntsig zoo dua qub, yog li tsav txoj kev loj hlob ntawm kev lag luam ruaj khov thiab ncig," said Yuebing Zheng, tus xibfwb ntawm Walker Department of Mechanical Engineering ntawm Cockrell. Lub Tsev Kawm Ntawv ntawm Engineering ntawm University of Texas ntawm Austin thiab ib qho ntawm cov thawj coj ua haujlwm. "Qhov kev tshawb pom no muaj qhov cuam tshuam tseem ceeb rau kev daws cov teeb meem ib puag ncig thiab nce qib ntawm ntsuab chemistry."
Plastic pollution tau dhau los ua teeb meem thoob ntiaj teb ib puag ncig, nrog ntau lab tons ntawm cov pov tseg yas khaws cia hauv qhov chaw pov tseg thiab dej hiav txwv txhua xyoo. Cov txheej txheem niaj hnub ntawm degrading plastics feem ntau yog siv zog, tsim kev puas tsuaj rau ib puag ncig, thiab siv tsis tau. Cov kws tshawb fawb pom zoo siv qhov kev tshawb pom tshiab no los tsim cov cuab yeej siv hluav taws xob zoo los txo cov pa phem.
Cov kws tshawb fawb tau siv lub teeb hluav taws xob tsawg los rhuav tshem cov yas cov tshuaj tiv thaiv thiab tsim cov khoom tshiab, hloov cov khoom siv rau hauv cov teeb pom kev zoo. Cov pa roj carbon dots no nyob rau hauv qhov kev thov siab vim muaj ntau yam ntawm cov pa roj carbon-based nanomaterials thiab tuaj yeem siv tau los ua cov khoom siv nco hauv cov cuab yeej siv computer tom ntej.
Jingang Li, tus tub ntxhais kawm ntawv qib siab ntawm UC Berkeley uas tau pib tshawb fawb no ntawm UT Austin tau hais tias "Nws zoo siab heev los hloov cov yas uas tsis muaj kev puas tsuaj rau hauv cov ntaub ntawv uas muaj txiaj ntsig zoo rau ntau yam kev lag luam.
Cov tshuaj tiv thaiv tshwj xeeb uas nws tau hais txog yog hu ua "CH activation," qhov twg carbon-hydrogen bonds hauv cov organic molecules raug xaiv tawg thiab hloov mus rau hauv cov ntawv cog lus tshiab. Hauv txoj kev tshawb no, cov khoom siv 2D catalyzed cov tshuaj tiv thaiv, tig hydrogen molecules rau hauv cov pa, uas tso cai rau cov pa roj carbon molecules sib txuas ua ke los tsim cov pa roj carbon monoxide uas khaws cov ntaub ntawv.
Kev tshawb fawb ntxiv thiab kev txhim kho yog xav tau los txhim kho lub teeb-tsav CH ua kom cov txheej txheem thiab ntsuas nws rau cov ntawv thov kev lag luam. Txawm li cas los xij, qhov kev tshawb fawb no sawv cev rau kev nce qib tseem ceeb hauv kev tshawb nrhiav cov kev daws teeb meem zoo rau kev tswj cov khib nyiab yas.
Lub teeb-tsav CH cov txheej txheem ua kom pom nyob rau hauv txoj kev tshawb no tuaj yeem siv rau ntau cov kab txuas ntev ntev, suav nrog polyethylene thiab surfactants uas feem ntau siv rau hauv nanomaterial systems.
Lwm tus kws sau ntawv yog los ntawm University of Texas ntawm Austin, Tohoku University hauv Nyij Pooj, University of California, Berkeley, Lawrence Berkeley National Laboratory, Baylor University, thiab Pennsylvania State University.
Txoj haujlwm tau txais kev txhawb nqa los ntawm cov nyiaj pab los ntawm National Institutes of Health, National Science Foundation, Nyiv Society rau Kev Tshawb Fawb Txog Kev Tshawb Fawb, Hirose Foundation, thiab National Natural Science Foundation ntawm Tuam Tshoj.
