I kitea he kohuke oneone whānui, ko te α-iron-(III) oxyhydroxide, he mea hangarua hei whakakorikori i te whakaiti i te hauhā waro ki te waikawa formic. Whiwhinga: Ahorangi Kazuhiko Maeda
He huarahi pai te whakaiti i te CO2 ki ngā wahie kawe pērā i te waikawa formic (HCOOH) hei ārai i te pikinga o ngā taumata CO2 i te āhuarangi. Hei āwhina i tēnei mahi, i tīpakohia e tētahi rōpū rangahau i te Whare Wānanga Hangarau o Tōkyō tētahi kohuke rino e wātea ana, ā, i utaina ki runga i tētahi tautoko alumina hei whakawhanake i tētahi whakakorikori ka taea te huri i te CO2 ki te HCOOH, tata ki te 90% te whiriwhiringa!
He kōwhiringa tino pai ngā waka hiko mō te tini o te tangata, ā, ko tētahi take matua, kāore he tukunga waro i roto. Heoi, ko tētahi ngoikoretanga nui mō te tini ko te kore o te tawhiti me te roa o te wā utu. Koinei te painga nui o ngā wahie wai pērā i te penehīni. Ko te tikanga o te nui o te pūngao he tawhiti roa me te tere o te whakakī hinu.
Mā te huri mai i te penehīni, te tīhiera rānei ki tētahi atu wahie wai ka taea te whakakore i ngā tukunga waro me te pupuri tonu i ngā painga o ngā wahie wai. Hei tauira, i roto i te pūtau wahie, ka taea e te waikawa formic te whakakaha i te miihini me te tuku wai me te hauhā waro. Heoi, ki te puta te waikawa formic mā te whakaiti i te CO2 o te hau ki te HCOOH, ko te wai anake te putanga kupenga.
He mea rongonui te pikinga o ngā taumata o te hauhā waro i roto i te āhuarangi me tā rātou takoha ki te mahana o te ao. I a ngā kairangahau e whakamātautau ana i ngā huarahi rerekē ki te raruraru, ka puta he otinga whai hua—te huri i te hauhā waro nui rawa i roto i te āhuarangi hei matū whai pūngao.
Kua aro nui te iwi ki te whakaputanga o ngā wahie pēnei i te waikawa formic (HCOOH) mā te whakaiti i te CO2 i te rā nā te mea he rua ngā painga o tēnei tukanga: ka whakaiti i ngā tukunga CO2 nui, ā, ka āwhina hoki ki te whakaiti i te korenga o te pūngao e pā ana ki a tātou i tēnei wā. Hei kaikawe pai mō te hauwai me te matotoru o te pūngao, ka taea e te HCOOH te whakarato pūngao mā te tahunga, me te tuku noa i te wai hei hua taha.
Hei whakatutuki i tēnei otinga whai hua, kua whakawhanakehia e ngā kaipūtaiao ngā pūnaha whakaahua-whakakorikori e whakaiti ana i te hauhā waro mā te āwhina o te rā. Kei roto i tēnei pūnaha he papa mimiti mārama (arā, he kaiwhakaahua-whakaoho) me tētahi whakakorikori e āhei ai te whakawhiti irahiko maha e hiahiatia ana mō te whakaiti i te CO2 ki te HCOOH. Nō reira ka tīmata te rapu i ngā whakakorikori e tika ana, e whai hua ana hoki!
Te whakaiti i te hauhā waro mā te whakamahi i ngā whakaahua matatini e whakamahia whānuitia ana. Whiwhinga: Ahorangi Kazuhiko Maeda
Nā te pai o te mahi me te āheinga ki te hangarua, e kiia ana ko ngā whakakorikori totoka ngā mea pai rawa atu mō tēnei mahi, ā, i roto i ngā tau, kua tūhuratia ngā āheinga whakakorikori o te maha o ngā anga whakarewa-ora (MOF) e ahu mai ana i te cobalt, te manganese, te nickel me te rino, ā, kei roto i ēnei he painga o te MOF i ētahi atu konganuku. Heoi, ko te nuinga o ngā whakakorikori e ahu mai ana i te rino kua pūrongohia tae noa ki tēnei wā ko te haukini waro anake te hua matua, ehara i te HCOOH.
Heoi, i tere te whakatau i tēnei raruraru e tētahi rōpū kairangahau i te Whare Wānanga Hangarau o Tōkyō (Tokyo Tech) i arahina e Ahorangi Kazuhiko Maeda. I roto i tētahi rangahau tata nei i whakaputaina i roto i te puka matū Angewandte Chemie, i whakaatu te rōpū i tētahi whakakorikori rino e tautokona ana e te alumina (Al2O3) mā te whakamahi i te α-rino(III) oxyhydroxide (α-FeO​​​ OH; geothite). Ko te whakakorikori α-FeO​​​OH/Al2O3 hou e whakaatu ana i te mahi tino pai o te hurihanga CO2 ki te HCOOH me te tino pai o te hangarua. I te pātaihia mō tā rātou whiringa whakakorikori, i mea a Ahorangi Maeda: "E hiahia ana mātou ki te tūhura i ngā huānga maha atu hei whakakorikori i roto i ngā pūnaha whakaiti whakaahua CO2. Me hiahia mātou ki tētahi whakakorikori totoka e kaha ana, e taea te hangarua, kāore e paitini, ā, he iti te utu. Koia mātou i whiriwhiri ai i ngā kohuke oneone kua horapa whānuitia pērā i te goethite mō ā mātou whakamātautau."
I whakamahia e te tīma tētahi tikanga whakakī māmā hei hanga i tā rātou whakakorikori. Kātahi ka whakamahia e rātou ngā rauemi Al2O3 e tautokona ana e te rino hei whakaiti i te CO2 i te pāmahana rūma i te aroaro o tētahi whakakorikori whakaahua e ahu mai ana i te ruthenium (Ru), te kaituku irahiko, me te mārama e kitea ana me ngā roangaru neke atu i te 400 nanometer.
He tino whakatenatena ngā hua. Ko te whiriwhiringa o tā rātou pūnaha mō te hua matua HCOOH he 80–90% me te hua matūriki o te 4.3% (e tohu ana i te whai huatanga o te pūnaha).
E whakaatu ana tēnei rangahau i tētahi whakakorikori totoka rino tuatahi o tōna momo ka taea te whakaputa HCOOH ina honoa ki tētahi kaiwhakaahua-whakaaro whai hua. Ka matapakihia hoki te hiranga o te rauemi tautoko tika (Al2O3) me tōna pānga ki te tauhohenga whakaiti whakaahua-matū.
"Tērā pea ka āwhina ngā māramatanga mai i tēnei rangahau ki te whakawhanake i ngā whakakorikori hou kāore he konganuku rangatira hei whakaiti i te hauhā waro ki ētahi atu matū whai hua."E whakaatu ana tā mātou rangahau ehara i te mea uaua te ara ki tētahi ōhanga pūngao matomato. Ahakoa ngā tikanga whakarite whakakorikori ngāwari ka taea te whakaputa hua pai, ā, e mōhiotia whānuitia ana ka taea te whakamahi i ngā matū whai kiko o te whenua, ki te tautokona e ngā matū pēnei i te alumina, hei whakakorikori whiriwhiri mō te whakaiti i te CO2," te whakatau a Ahorangi Maeda.
Tohutoro: "Alumina-Supported Alpha-Iron (III) Oxyhydroxide as a Recyclable Solid Catalyst for CO2 Photoreduction under Visible Light" na Daehyeon An, Dr. Shunta Nishioka, Dr. Shuhei Yasuda, Dr. Tomoki Kanazawa, Dr. Yoshinobu, Prof.. Toshiyuki, Prof. 12 Haratua 2022, Angewandte Chemie.DOI: 10.1002 / anie.202204948
"Koinei te painga nui o ngā wahie wai pērā i te penehīni. Nā te nui o te pūngao, ka roa te tawhiti me te tere o te whakakī hinu."
Me pēhea ētahi tau? He aha te whakataurite o te kiato pūngao o te waikawa formic ki te penehīni? Kotahi noa te ngota waro i roto i te tātai matū, kāore au i te tino whakapono ka tata ki te penehīni.
Hei tāpiritanga atu ki tēnā, he tino paitini te haunga, ā, hei waikawa, he nui ake te waikura i te penehīni. Ehara ēnei i te mea he raruraru hangarau kāore e taea te whakatau, engari ki te kore te waikawa formic e tuku painga nui ki te whakanui ake i te tawhiti me te whakaiti i te wā whakakī hinu pākahiko, kāore pea e tika ana te whakapau kaha.
Me i whakaaro rātou ki te tango i te goethite mai i te oneone, he mahi keri nui e hiahiatia ana te pūngao, ā, ka kino pea ki te taiao.
Tērā pea ka kōrero rātou mō te nui o te goethite i roto i te oneone, nā te mea ki taku whakaaro ka nui ake te pūngao e hiahiatia ana hei tiki i ngā rauemi mata e tika ana, hei tauhohe hoki i aua rauemi hei hanga goethite.
He mea tika kia tirohia te huringa ora katoa o te tukanga, me te tatau i te utu pūngao o ngā mea katoa. Kāore a NASA i kite i tētahi whakarewatanga kore utu. Me maumahara ētahi atu ki tēnei.
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