Tinoshandisa makuki kuti tivandudze ruzivo rwenyu. Nekuramba muchitsvaga saiti ino, munobvuma kushandisa kwedu makuki. Ruzivo rwakawanda.
Kuramba kuripo kwehupfumi hwenyika kuchida mafuta ane kabhoni yakawanda kwakaita kuti kabhoni dhayokisaidhi (CO2) iwedzere mumhepo. Kunyangwe zvikaitwa kuedza kuderedza kuburitswa kwekabhoni dhayokisaidhi, hazvina kukwana kugadzirisa migumisiro yakaipa yegasi riri mumhepo.
Saka masayendisiti akagadzira nzira dzekugadzira dzekushandisa kabhoni dhayokisaidhi iri mumhepo nekuishandura kuita mamorekuru anobatsira akadai se formic acid (HCOOH) ne methanol. Kuderedzwa kwekabhoni dhayokisaidhi uchishandisa chiedza chinoonekwa inzira yakajairika yekushandura kwakadaro.
Chikwata chemasayendisiti kubva kuTokyo Institute of Technology, chinotungamirwa naProfessor Kazuhiko Maeda, chafambira mberi zvikuru uye chakanyora izvi mubhuku repasi rose rinonzi “Angewandte Chemie” rakanyorwa musi wa8 Chivabvu, 2023.
Vakagadzira tin-based metal-organic framework (MOF) inobvumira selective photoreduction yecarbon dioxide. Vaongorori vanogadzira tin itsva (Sn)-based MOF ine chemical formula [SnII2(H3ttc)2.MeOH]n (H3ttc: trithiocyanuric acid uye MeOH: methanol).
Maphotocatalyst eCO2 anoonekwa nechiedza anoshanda zvakanyanya anoshandisa simbi dzinokosha dzisingawanzoonekwi sezvikamu zvikuru. Uyezve, kubatanidzwa kwemabasa ekupinza chiedza uye ekugadzirisa chiedza muchikamu chimwe chete chemorekuru chinoumbwa nesimbi dzakawanda kuchiri dambudziko renguva refu. Saka, Sn inzvimbo yakakodzera nekuti inogona kugadzirisa matambudziko ese ari maviri.
MOFs ndidzo dzakanakisa pakugadzira simbi nezvinhu zvechisikigo, uye MOFs dziri kudzidzwa senzira yekurima panzvimbo pema photocatalysts echinyakare.
Sn isarudzo inogona kushandiswa neMOF-based photocatalysts nekuti inogona kushanda se catalyst uye scavenger panguva ye photocatalytic process. Kunyangwe MOFs dzine lead, iron, uye zirconium-based MOFs dzakadzidzwa zvakanyanya, zvishoma zvinozivikanwa nezve tin-based MOFs.
H3ttc, MeOH uye tin chloride zvakashandiswa sezvinhu zvekutanga kugadzira MOF KGF-10 yakagadzirwa netin, uye vaongorori vakasarudza kushandisa 1,3-dimethyl-2-phenyl-2,3-dihydro-1H-benzo[d]imidazole. inoshanda semupi wemaerekitironi uye sosi yehydrogen.
KGF-10 inozobva yaongororwa nenzira dzakasiyana-siyana. Vakaona kuti chinhu chacho chine bandgap ye2.5 eV, chinotora mawavelength echiedza chinoonekwa, uye chine simba rekudzikisa carbon dioxide zvine mwero.
Masayendisiti paakangonzwisisa hunhu hwezvinhu zvitsva izvi, vakazvishandisa kuderedza kabhoni dhayokisaidhi kana paine chiedza chinoonekwa. Vakaona kuti KGF-10 inogona kushandura CO2 kuita formate (HCOO–) zvinobudirira uye zvine hungwaru ne99% pasina chikonzero chekuwedzera photosensitizers kana catalysts.
Inewo quantum goho rakawanda (chiyero chehuwandu hwemaerekitironi anobatanidzwa mukuita kwechiitiko kusvika kuhuwandu hwemaphotoni echiitiko) che9.8% pahurefu hwewavelength ye400 nm. Uyezve, ongororo yechimiro yakaitwa mukati mekuita kwechiitiko yakaratidza kuti KGF-10 yakagadziriswa chimiro chakasimudzira kudzikiswa kwephotocatalytic.
Chidzidzo ichi chinopa kekutanga photocatalyst inoshanda zvikuru, ine chinhu chimwe chete, isina simbi inokosha isina tin kuti ikurumidze kushandurwa kwecarbon dioxide kuti iite maumbirwo. Hunhu hunoshamisa hweKGF-10 hwakawanikwa nechikwata hunovhura mikana mitsva yekushandiswa kwayo se photocatalyst mumabasa akadai sekuderedza kuburitswa kweCO2 uchishandisa simba rezuva.
Purofesa Maeda akagumisa achiti: “Zvatakawana zvinoratidza kuti MOFs dzinogona kushanda senzvimbo yekushandisa simbi dzisina chepfu, dzisingadhuri, uye dzakapfuma pasi rose kugadzira mabasa epamusoro ekugadzira ma photocatalytic asingawanzo kuwanikwa uchishandisa ma molecular metal complexes.”
Kamakura Y nevamwe (2023) Mafuremu esimbi-organic akavakirwa paTin(II) anogonesa kuderedza carbon dioxide zvakanaka uye zvinosarudzwa kuti iumbwe pasi pechiedza chinoonekwa. Applied Chemistry, International Edition. doi:10.1002/ani.202305923
Mubvunzurudzo iyi, Dr. Stuart Wright, Senior Scientist kuGatan/EDAX, anokurukura neAZoMaterials mashandisirwo akawanda e electron backscatter diffraction (EBSD) musayenzi yezvinhu uye simbi.
Mubvunzurudzo iyi, AZoM inokurukura nezvemakore makumi matatu eruzivo rwakakosha rweAvantes mukuongorora ma spectroscopy, basa ravo uye remangwana rezvigadzirwa neAvantes Product Manager Ger Loop.
Mubvunzurudzo iyi, AZoM inotaura naAndrew Storey weLECO nezve glow discharge spectroscopy uye kugona kunopiwa neLECO GDS950.
Makamera eClearView® anoshanda zvakanyanya anovandudza mashandiro ekushandisa electron microscopy (TEM) inofambiswa nemagetsi.
XRF Scientific Orbis Laboratory Jaw Crusher imhando yekupwanya simbi ine simba rekuita zvinhu zviviri, ine simba rekushandisa simbi yekupwanya simbi inogona kuderedza saizi yesampuro nekupeta ka55 saizi yayo yepakutanga.
Dzidza nezve Bruer's Hysitron PI 89 SEM picoindenter, picoindenter yemazuva ano yekuongorora nanomechanical quantitative in situ.
Musika wepasi rose we semiconductor wapinda munguva inonakidza. Kudiwa kwetekinoroji ye chip kwakakonzera uye kwakakanganisa indasitiri, uye kushomeka kwe chip kuri kutarisirwa kuramba kuripo kwenguva yakati. Mafambiro aripo anogona kuumba ramangwana reindasitiri, uye maitiro aya acharamba achiitika.
Musiyano mukuru uripo pakati pemabhatiri egraphene nemabhatiri e-solid-state ndewekuumbwa kweelectrode yega yega. Kunyangwe cathode ichiwanzo gadziriswa, ma allotropes ekabhoni anogonawo kushandiswa kugadzira anodes.
Mumakore achangopfuura, Indaneti yezvinhu yakaunzwa nekukurumidza mumaindasitiri anenge ese, asi inonyanya kukosha muindasitiri yemotokari dzemagetsi.