Kutulutsa kwa Photoelectrochemical

Njira zochotsera poizoni pogwiritsa ntchito photochemical powononga zinthu zoipitsa zimaphatikizapo njira zomwe zimaphatikizapo catalytic ndi non-catalytic photochemical oxidation. Njira zoyamba nthawi zambiri zimagwiritsa ntchito okosijeni ndi hydrogen peroxide ngati ma oxidants ndipo zimadalira kuwala kwa ultraviolet (UV) kuti ziyambe kuwononga zinthu zoipitsa. Njira zomalizazi, zomwe zimadziwika kuti photocatalytic oxidation, nthawi zambiri zimatha kugawidwa m'magulu monga homogeneous ndi heterogeneous catalysis.

Mu kuwonongeka kwa ma photocatalytic kosiyanasiyana, kuchuluka kwa zinthu za semiconductor zomwe zimakhala ndi kuwala zimalowetsedwa mu dongosolo loipitsidwa, kuphatikiza ndi kuchuluka kwa kuwala. Izi zimapangitsa kuti pakhale kukwiya kwa ma "electron-hole" awiriawiri pamwamba pa semiconductor yomwe imakhala ndi kuwala pansi pa kuwala. Mpweya wosungunuka, mamolekyu amadzi, ndi zinthu zina zomwe zimakhudzidwa ndi semiconductor zimalumikizana ndi ma "electron-hole" awa, kusunga mphamvu yochulukirapo. Izi zimathandiza tinthu ta semiconductor kugonjetsa zopinga za thermodynamic reaction ndikugwira ntchito ngati ma catalyst mu machitidwe osiyanasiyana a catalytic, ndikupanga ma radicals oxidative kwambiri monga •HO. Ma radical awa amathandizira kuwonongeka kwa zonyansa kudzera munjira monga kuwonjezera hydroxyl, kusintha, ndi kusamutsa ma electron.

Njira zoyeretsera kuwala kwa photochemical zimaphatikizapo oxidation yomwe imadziwika ndi kuwala kwa photosensitized, oxidation yomwe imatuluka ndi kuwala kwa photocatalytic, ndi oxidation yomwe imatuluka ndi kuwala kwa photocatalytic. Oxidation ya photochemical imaphatikiza oxidation ya mankhwala ndi kuwala kwa radiation kuti iwonjezere liwiro ndi mphamvu ya okosijeni ya zochitika za okosijeni poyerekeza ndi okosijeni ya mankhwala kapena chithandizo cha kuwala kwa radiation. Kuwala kwa ultraviolet nthawi zambiri kumagwiritsidwa ntchito ngati gwero la kuwala kwa photocatalytic oxidation.

Kuphatikiza apo, kuchuluka kwa ma oxidants monga hydrogen peroxide, ozone, kapena ma catalysts enaake kuyenera kulowetsedwa m'madzi. Njirayi ndi yothandiza kwambiri pochotsa mamolekyu ang'onoang'ono achilengedwe, monga utoto, omwe ndi ovuta kuwawononga komanso omwe ali ndi poizoni. Zochita za Photochemical oxidation zimapanga ma radicals ambiri omwe amagwira ntchito kwambiri m'madzi, omwe amasokoneza mosavuta kapangidwe ka mankhwala achilengedwe.