Minerali ya misava leyi hangalasiweke ngopfu, α-iron-(III) oxyhydroxide, yikumeke yiri xihlohloteri lexinga vuyeleriwaka xa photoreduction ya carbon dioxide kuya eka formic acid.Xikweleti: Prof. Kazuhiko Maeda
Photoreduction ya CO2 kuya eka mafurha lawa ya fambiwaka kufana na formic acid (HCOOH) i ndlela ya kahle yo lwisana na ku tlakuka ka ti levele ta CO2 eka xibakabaka.Ku pfuneta eka ntirho lowu, ntlawa wa vulavisisi eka Tokyo Institute of Technology wu hlawurile minerali leyi kumekaka hiku olova leyi sekeriweke eka iron kutani yiyi layicha eka nseketelo wa alumina kuva yi tumbuluxa catalyst leyi nga hundzulaka CO2 hindlela ya kahle kuva HCOOH, kwalomu ka 90% wa ku hlawula!
Mimovha ya gezi i ndlela yo koka rinoko eka vanhu vo tala, naswona xivangelo xa nkoka hileswaku a yi na ku humesiwa ka khaboni.Xiphiqo lexikulu eka vo tala, hambiswiritano, i ku pfumaleka ka yona ka mpfhuka na minkarhi yo leha yo chaja.Laha hi laha mafurha ya mati yo fana na petirolo ya nga na vuyelo lebyikulu.Ku tala ka yona ka eneji ya le henhla swi vula mpfhuka wo leha na ku hatlisa ku chela mafurha.
Ku cinca kusuka eka petirolo kumbe dizele kuya eka mafurha yohambana ya mati swinga herisa ku humesiwa ka khaboni loko kurikarhi ku hlayisa swipfuno swa mafurha ya mati.Eka sele ya mafurha, xikombiso, formic acid yinga nyika matimba eka njhini loko yiri karhi yi humesa mati na carbon dioxide.Hambiswiritano, loko formic acid yi humelerisiwa hiku hunguta CO2 yale xibakabakeni kuya eka HCOOH, kutani vuhumelerisi bya net ntsena i mati.
Ku tlakuka ka mpimo wa khaboni-dayokisayidi exibakabakeni xa hina ni ku hoxa xandla ka swona eku hiseni ka misava sweswi i mahungu lama tolovelekeke.Loko valavisisi va ri karhi va ringeta tindlela to hambana-hambana to lulamisa xiphiqo lexi, ku humelele ntlhantlho lowu tirhaka—ku hundzula khaboni-dayokisayidi leyi tlulaka mpimo exibakabakeni yi va tikhemikhali leti fuweke hi matimba.
Ku endliwa ka mafurha yofana na formic acid (HCOOH) hi photoreduction ya CO2 eka ku vonakala ka dyambu swikoke nyingiso lowukulu sweswinyana hikuva endlelo leri rina mbuyelo kambirhi: ri hunguta ku humesiwa ka CO2 loku tlulaka mpimo naswona ritlhela ri pfuneta ku hunguta eneji leyi hi langutaneke na yona sweswi. ku pfumaleka.Tanihi murhwali lonene wa hayidirojeni leyi nga na nhlayo ya le henhla ya eneji, HCOOH yi nga nyika eneji hi ku hisa loko yi ri karhi yi humesa mati ntsena tanihi xiendliwa xa le tlhelo.
Ku endla leswaku ntlhantlho lowu wu vuyerisaka wu va wa xiviri, vativi va sayense va endle tisisiteme ta photocatalytic leti hungutaka khaboni-dayokisayidi hi ku pfuniwa hi ku vonakala ka dyambu.Sisiteme leyi yi vumbiwa hi substrate leyi tswongaka ku vonakala (i.e., photosensitizer) na catalyst leyi endlaka leswaku ku hundziseriwa ka tielektroni to tala loku lavekaka ku hunguta CO2 ku ya eka HCOOH.Naswona xisweswo va sungule ku lavisisa ti catalysts leti faneleke na leti tirhaka kahle!
Ku hungutiwa ka khaboni-dayokisayidi hi photocatalytic hi ku tirhisa infographics ya nkatsakanyo leyi tirhisiwaka ngopfu.Xikweleti: Profesa Kazuhiko Maeda
Hikokwalaho ka vukorhokeri bya tona xikan’we naku vuyiseriwa ka tona, ti solid catalysts ti tekiwa tani hi ti candidates ta kahle eka ntirho lowu, naswona eka malembe lawa yanga hundza, vuswikoti bya catalytic bya ti cobalt, manganese, nickel na iron-based metal-organic frameworks (MOFs) totala byi lavisisiwile, exikarhi ka swona Leyi yo hetelela yina swipfuno swokarhi eka tinsimbi tin’wana.Hambiswiritano, ti catalysts totala letinga vikiwa kufikela sweswi ti humesa ntsena carbon monoxide tani hi leswi xiendliwa lexikulu, hayi HCOOH.
Hambiswiritano, xiphiqo lexi xi hatle xi tlhantlhiwile hi ntlawa wa valavisisi va Tokyo Institute of Technology (Tokyo Tech) lowu a wu rhangela hi Profesa Kazuhiko Maeda.Eka nkambisiso wa sweswinyana lowu kandziyisiweke eka magazini wa tikhemikhali wa Angewandte Chemie, ntlawa lowu wu kombise xihlohloteri lexi seketeriwaka hi alumina (Al2O3) lexi sekeriweke eka nsimbi hi ku tirhisa α-iron(III) oxyhydroxide (α-FeO ​​OH; geothite).Novhele ya α-FeO ​​OH/Al2O3 catalyst yi kombisa matirhelo ya kahle swinene yo hundzula CO2 ku ya eka HCOOH na ku vuyiseriwa ka kahle swinene.Loko va vutisiwile hi ku hlawula ka vona ka catalyst, Profesa Maeda u te: "Hi lava ku lavisisa swiaki swo tala swo tala tanihi swihlohloteri eka tisisiteme ta CO2 photoreduction. Hi lava xihlohloteri xo tiya lexi tirhaka, lexi nga tlheriseriwaka endzhaku, lexi nga riki na chefu naswona a yi durhi.Hi yona mhaka leyi hi hlawuleke timinerali ta misava leti hangalasiweke ngopfu to tanihi goethite eka swikambelo swa hina.”
Xipano lexi xi tirhise ndlela yo olova ya impregnation ku hlanganisa catalyst ya vona.Kutani va tirhise switirhisiwa swa Al2O3 leswi seketeriwaka hi nsimbi ku hunguta hi photocatalytically CO2 eka mahiselo ya kamara eka vukona bya ruthenium-based (Ru) photosensitizer, electron donor, na ku vonakala loku vonakaka loku nga na wavelengths yo tlula 400 nanometers.
Mbuyelo wa khutaza swinene.Ku hlawula ka sisiteme ya vona eka xiendliwa lexikulu xa HCOOH akuri 80–90% na mbuyelo wa quantum wa 4.3% (leswi kombisaka ku tirha kahle ka sisiteme).
Dyondzo leyi yi humesa xitirhisiwa xo sungula xa muxaka wa xona xa iron-based solid catalyst lexi nga humesaka HCOOH loko xi hlanganisiwa na photosensitizer leyi tirhaka kahle.Yi tlhela yi vulavula hi nkoka wa switirhisiwa leswi faneleke swo seketela (Al2O3) na mbuyelo wa yona eka photochemical reduction reaction.
Vutivi lebyi humaka eka ndzavisiso lowu byi nga pfuna ku tumbuluxa swihlohloteri leswintshwa leswi nga riki na nsimbi swa xiyimo xa le henhla swa photoreduction ya khaboni-dayokisayidi ku ya eka tikhemikhali tin’wana leti pfunaka.”Vulavisisi bya hina byi kombisa leswaku ndlela yo ya eka ikhonomi ya eneji ya rihlaza a yi rharhangananga.Hambi ku ri tindlela to olova to lunghiselela swihlohloteri ti nga humesa mbuyelo lowukulu, naswona swa tiveka kahle leswaku swihlanganisi leswi nga na tinsimbi to tala, loko swi seketeriwa hi swihlanganisi swo fana na alumina, swi nga tirhisiwa na swona tanihi xihlohloteri xo hlawula xa CO2 ku hungutiwa,” ku gimeta Prof. Maeda.
Swikombo: “Alumina-Supported Alpha-Iron (III) Oxyhydroxide tanihi Xihlohloteri xo tiya lexi nga vuyeleriwaka xa ku hunguta ku vonakala ka CO2 ehansi ka ku vonakala loku vonakaka” hi Daehyeon An, Dokodela Shunta Nishioka, Dokodela Shuhei Yasuda, Dokodela Tomoki Kanazawa, Dokodela Yoshinobu Kamakura, Prof .. Toshiyuki Yokoi, Prof. Shunsuke Nozawa, Prof. Kazuhiko Maeda, 12 Mawuwani 2022, Angewandte Chemie.DOI: 10.1002 / anie.202204948. Xihlamusela-marito xa Xitsonga
"Hi kona laha mafurha ya mati yo fana na petirolo ya nga na vuyelo lebyikulu. Ku tala ka wona ka eneji lokukulu swi vula ku famba mpfhuka wo leha na ku hatlisa ku chela petirolo."
Xana ku vuriwa yini hi tinomboro tin’wana?Xana ku tsindziyela ka eneji ya formic acid ku pimanisiwa njhani na petirolo?Hi athomo yin’we ntsena ya khaboni eka fomula ya tikhemikhali, ndza kanakana leswaku a yi ta tshinela hambi ku ri ekusuhi na petirolo.
Ku engetela eka sweswo, nun’hwelo wuna chefu swinene naswona, tani hi acid, wu onha ngopfu kutlula petirolo.Leswi ahi swiphiqo swa vunjhiniyara leswinga tlhantlhiwangiki, kambe handle ka loko formic acid yinyika swipfuno leswikulu eka ku engetela range xikan’we naku hunguta nkarhi wo chela mafurha eka betri, kumbexana aswi faneri ku endla matshalatshala.
Loko va kunguhata ku humesa goethite eka misava, akuri ntirho wa migodi lowu lavaka eneji yotala naswona wunga onha mbango.
Vanga boxa goethite yotala emisaveni tani hileswi ndzi ehleketaka leswaku swinga lava matimba yotala kuva ku kuma switirhisiwa leswi lavekaka swa raw naku swi endla leswaku kuta endliwa goethite.
Swi fanerile ku languta xirhendzevutani hinkwaxo xa vutomi bya endlelo na ku hlayela ntsengo wa eneji ya xin’wana na xin’wana.NASA a yi kumanga nchumu lowu vuriwaka ku rhumeriwa ka mahala.Van’wana va fanele ku hlayisa leswi emiehleketweni.
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