Kawanishi, Japan, Nov. 15, 2022 /PRNewswire/ — Nneɛma a atwa yɛn ho ahyia ho nsɛm te sɛ wim nsakrae, abɔdeɛ mu nneɛma a ɛresɛe, mmoa ahodoɔ a wɔyera, plastic a wɔsɛe no ne kwaeɛ a wɔsɛe no reyɛ kɛseɛ wɔ wiase nyinaa ɛnam nnipa dodoɔ a ɛrepaapae nti.
Carbon dioxide (CO2) yɛ mframa a ɛma wim yɛ hyew na ɛyɛ nneɛma atitiriw a ɛde wim nsakrae ba no mu biako. Wɔ eyi mu no, ɔkwan bi a wɔfrɛ no “artificial photosynthesis (CO2 photoreduction)” betumi ayɛ nneɛma a wɔde yɛ aduan a nkwa wom a wɔde yɛ pɛtro ne nnuru a efi CO2, nsu ne owia ahoɔden mu, sɛnea afifide yɛ no. Bere koro no ara mu no, wɔtew CO2 a wɔtow gu no so nso, efisɛ wɔde CO2 di dwuma sɛ aduan a wɔde yɛ ahoɔden ne nnuru a wɔde yɛ nneɛma. Enti, wobu photosynthesis a wɔde nsa ayɛ sɛ mfiridwuma a aba so foforo a wɔde yɛ ahabammono no mu biako.
MOFs (Metal Organic Frameworks) yɛ nneɛma a ɛyɛ ultraporous a ɛyɛ dadeɛ a ɛnyɛ abɔdeɛ ne organic linkers akuwakuw. Wobetumi adi wɔn so wɔ molecule level wɔ nanometer kwan so na ɛwɔ soro kɛse. Esiane saa nneɛma yi nti, wobetumi de MOFs adi dwuma wɔ gas a wɔkora so, mpaapaemu, dade a wɔtwetwe, catalysis, nnuru a wɔde ma, nsuo a wɔde yɛ adwuma, sensor, electrodes, filters, ne nea ɛkeka ho Nnansa yi ara, wɔahu sɛ MOFs wɔ CO2 capture tumi a ɛbɛtumi ayɛ photoreduced CO2, kyerɛ sɛ, artificial photosynthesis.
Nanso quantum dots deɛ, ɛyɛ nneɛma a ɛyɛ teateaa paa (0.5–9 nm) a ne optical su ne quantum chemistry ne quantum mechanics mmara hyia. Wɔfrɛ wɔn “atɔm anaa molecule a wɔde ayɛ” efisɛ quantum dot biara yɛ atɔm anaa molecule mpempem kakraa bi anaa mpempem kakraa bi pɛ. Wɔ saa kɛseyɛ yi mu no, ahoɔden dodow a ɛwɔ ɛlɛtrɔnik no mu no nkɔ so bio na ɛtetew esiane honam fam adeyɛ bi a wonim no sɛ quantum confinement effect nti. Wɔ eyi mu no, hann a ɛba no asorɔkye tenten begyina quantum dots no kɛse so. Saa quantum dots yi nso wobetumi de adi dwuma wɔ artificial photosynthesis mu esiane wɔn hann a ɛtwetwe tumi kɛse, tumi a ɛma exciton pii ne asase ani kɛse nti.
Wɔayɛ MOF ne quantum dots nyinaa wɔ Green Science Alliance ase. Kan no, wɔde MOF quantum dot composite nneɛma adi dwuma yiye de ayɛ formic acid sɛ ade titiriw a ɛma hann a wɔde ayɛ nneɛma yɛ adwuma. Nanso, saa nneɛma a ɛma nneɛma yɛ kɛse yi yɛ powder na ɛsɛ sɛ wɔde filtration boaboa saa catalyst powders yi ano wɔ adeyɛ biara mu. Enti, esiane sɛ saa akwan yi nkɔ so nti, ɛyɛ den sɛ wɔde bedi dwuma wɔ mfiridwuma mu mfaso a mfaso wɔ so.
Wɔ mmuaema mu no, Owura Tetsuro Kajino, Owura Hirohisa Iwabayashi, ne Oduruyɛfo Ryohei Mori a wɔwɔ Green Science Alliance Co., Ltd. de wɔn mfiridwuma dii dwuma de siw saa nneɛma titiriw a wɔde yɛ hann a ɛma hann yɛ adwuma yi antumi ankɔ baabiara wɔ ntama a ne bo nyɛ den so na wɔyɛɛ ɔkwan foforo a wɔfa so yɛ formic acid. a ebetumi ayɛ adwuma bere nyinaa wɔ mfiridwuma mu nneɛma a mfaso wɔ so mu. Sɛ wɔyɛ photosynthesis a wɔde ayɛ adwuma no wie a, wobetumi ayi nsu a formic acid wom no afi mu de ayi, na wɔasan de nsu pa foforo ahyɛ ade no mu de akɔ so asan afi photosynthesis a wɔde ayɛ no ase.
Formic acid betumi asi hydrogen pɛtro ananmu. Ade titiriw biako nti a esiw hydrogen fekuw a ɛtrɛw wɔ wiase nyinaa ano ne sɛ hydrogen yɛ atɔm ketewaa bi wɔ amansan no mu, enti ɛyɛ den sɛ wɔbɛkora so, na hydrogen tank a ɛwɔ tumi kɛse a ɛkata so a wɔbɛyɛ no bɛyɛ nea ne bo yɛ den yiye. Nea ɛka ho no, hydrogen mframa betumi apae na ɛde ahobammɔ ato asiane mu. Esiane sɛ formic acid yɛ nsu nti, ɛnyɛ den sɛ wɔbɛkora so sɛ pɛtro. Sɛ ɛho hia a, wobetumi de formic acid adi dwuma de ama hydrogen ayɛ wɔ beae a ɛwɔ hɔ no. Nea ɛka ho no, wobetumi de formic acid adi dwuma sɛ ade a wɔde yɛ nnuru ahorow.
Ɛwom sɛ sɛnea afiri a wɔde yɛ hann no yɛ adwuma yiye no da so ara sua de, nanso Green Science Alliance bɛkɔ so ako ama nkɔso a ɛbɛma wɔatumi ayɛ adwuma yiye de ayɛ nneɛma a mfaso wɔ so a wɔde bedi dwuma wɔ afiri a wɔde yɛ hann mu.