Photoelectrochemical Oxidation

Njira za Photochemical oxidation pakuwonongeka kwa zoipitsa zimaphatikizapo njira zophatikizira zonse zomwe zimathandizira komanso zopanda mphamvu za Photochemical oxidation. Oyamba nthawi zambiri amagwiritsa ntchito oxygen ndi hydrogen peroxide monga oxidant ndipo amadalira kuwala kwa ultraviolet (UV) kuyambitsa makutidwe ndi okosijeni ndi kuwola kwa zoipitsa. Yotsirizirayi, yomwe imadziwika kuti photocatalytic oxidation, imatha kugawidwa m'magulu amtundu umodzi komanso wosiyanasiyana.

Mu heterogeneous photocatalytic degradation, kuchuluka kwa photosensitive semiconductor zakuthupi kumalowetsedwa mu dongosolo loipitsidwa, kuphatikiza ndi kuchuluka kwa ma radiation owala. Izi zimabweretsa chisangalalo cha "electron-hole" awiriawiri pa photosensitive semiconductor pamwamba pa kuyatsa. Mpweya wosungunuka, mamolekyu amadzi, ndi zinthu zina zomwe zimayikidwa pa semiconductor zimagwirizana ndi "electron-hole" awiriawiriwa, kusunga mphamvu zochulukirapo. Izi zimathandiza semiconductor particles kugonjetsa thermodynamic anachita zotchinga ndi kuchita monga chothandizira zosiyanasiyana chothandizira zimachitikira, kupanga kwambiri okosijeni ankafuna kusintha zinthu mopitirira monga • H O. Ma radicals awa amathandizira kuwonongeka kwa zoipitsa kudzera munjira monga kuwonjezera kwa hydroxyl, kulowetsa, ndi kusamutsa ma elekitironi.

Njira za Photochemical oxidation zimaphatikizira makutidwe ndi okosijeni a photosensitized, okosijeni wa Photoexcited, ndi Photocatalytic oxidation. Photochemical makutidwe ndi okosijeni amaphatikiza makutidwe ndi okosijeni wamankhwala ndi ma radiation kuti apititse patsogolo kuchuluka kwa makutidwe ndi okosijeni amachitidwe a okosijeni poyerekeza ndi makutidwe ndi okosijeni amankhwala kapena ma radiation. Kuwala kwa ultraviolet kumagwiritsidwa ntchito ngati gwero la radiation mu photocatalytic oxidation.

Kuphatikiza apo, mulingo wodziwikiratu wa okosijeni monga hydrogen peroxide, ozoni, kapena zopangira zina ziyenera kulowetsedwa m'madzi. Njirayi ndi yothandiza kwambiri pakuchotsa mamolekyu ang'onoang'ono, monga utoto, omwe ndi ovuta kuwatsitsa komanso kukhala ndi kawopsedwe. Photochemical oxidation reactions imapanga ma radicals ambiri otakasika kwambiri m'madzi, omwe amasokoneza mosavuta kapangidwe ka organic.