Asayansi ku Tokyo Institute of Technology asonyeza kuti mkuwa oxide particles pa sub-nanoscale ndi amphamvu catalysts kuposa pa nanoscale.Ma subnanoparticles awa amathanso kupangitsa kuti makutidwe ndi okosijeni azitha kununkhira bwino kwambiri kuposa zopangira zomwe zimagwiritsidwa ntchito masiku ano m'makampani.Kafukufukuyu akutsegulira njira yogwiritsira ntchito bwino komanso moyenera ma hydrocarbons onunkhira, omwe ndi zida zofunika pa kafukufuku ndi mafakitale.

Kusankhidwa kwa okosijeni kwa ma hydrocarbon ndikofunikira pamachitidwe ambiri amankhwala komanso m'mafakitale, motero, asayansi akhala akuyang'ana njira zabwino kwambiri zochitira izi.Copper oxide (CunOx) nanoparticles zapezeka zothandiza monga chothandizira pokonza onunkhira ma hydrocarbons, koma kufunafuna ngakhale kothandiza kwambiri kwapitilira.

M'mbuyomu, asayansi adagwiritsa ntchito zida zopangira zitsulo zopangidwa ndi tinthu tating'onoting'ono ta nano.Pa mlingo uwu, particles kuyeza zosakwana nanometer ndipo pamene aikidwa pa magawo oyenera, iwo akhoza kupereka ngakhale pamwamba pamwamba madera kuposa nanoparticle catalysts kulimbikitsa reactivity.

Muzochitika izi, gulu la asayansi kuphatikizapo Prof. Kimihisa Yamamoto ndi Dr. Makoto Tanabe ochokera ku Tokyo Institute of Technology (Tokyo Tech) adafufuza momwe mankhwala amachitira ndi CunOx subnanoparticles (SNPs) kuti awone momwe amachitira mu okosijeni wa ma hydrocarbon onunkhira.CunOx SNPs zazikulu zitatu (zokhala ndi 12, 28, ndi 60 maatomu amkuwa) zinapangidwa mkati mwa mitengo ngati mitengo yotchedwa dendrimers.Mothandizidwa ndi gawo lapansi la zirconia, adayikidwa ku aerobic oxidation ya organic pawiri yokhala ndi mphete ya benzene yonunkhira.

X-ray photoelectron spectroscopy (XPS) ndi infrared spectroscopy (IR) adagwiritsidwa ntchito kusanthula mapangidwe a SNP's, ndipo zotsatira zake zidathandizidwa ndi kuwerengera kwa density functionality theory (DFT).

Kusanthula kwa XPS ndi kuwerengera kwa DFT kunawonetsa kuwonjezereka kwa ma bond a copper-oxygen (Cu-O) pamene kukula kwa SNP kunatsika.Kuphatikizika kwaubwenzi kumeneku kunali kokulirapo kuposa komwe kumawonedwa m'mabondi ambiri a Cu-O, ndipo kuphatikizika kwakukulu kudapangitsa kuti CunOx SNP ipitirire patsogolo.

Tanabe ndi mamembala a gululo adawona kuti CunOx SNPs imathandizira kuti makutidwe ndi okosijeni amagulu a CH3 omwe amaphatikizidwa ndi mphete yonunkhira, motero amatsogolera kupanga zinthu.Pamene chothandizira cha CunOx SNP sichinagwiritsidwe ntchito, palibe mankhwala omwe anapangidwa.Chothandizira chokhala ndi CunOx SNPs yaying'ono kwambiri, Cu12Ox, chinali ndi ntchito yabwino kwambiri yothandiza ndipo chidakhala chotalika kwambiri.

Monga Tanabe akufotokozera, "kupititsa patsogolo kukhazikika kwa maukonde a Cu-O ndi kuchepa kwa kukula kwa CunOx SNPs kumathandizira ntchito yawo yabwino yopangira ma hydrocarbon oxidation."

Kafukufuku wawo amachirikiza kutsutsana kuti pali kuthekera kwakukulu kogwiritsa ntchito copper oxide SNPs monga chothandizira pa ntchito za mafakitale."Kachitidwe kothandizira ndi makina a CunOx SNPs oyendetsedwa ndi kukula atha kukhala abwinoko kuposa zida zopangira zitsulo zabwino, zomwe zimagwiritsidwa ntchito kwambiri m'makampani pakadali pano," atero Yamamoto, akulozera zomwe CunOx SNPs ingakwaniritse mtsogolo.

Zida zoperekedwa ndi Tokyo Institute of Technology.Zindikirani: Zomwe zili mkati zitha kusinthidwa malinga ndi kalembedwe ndi kutalika.

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