Izindlela ze-Photochemical oxidation zokucekelwa phansi kwezinto ezingcolisayo zifaka izinqubo ezibandakanya kokubili i-catalytic ne-non-catalytic photochemical oxidation. Eyangaphambili ivamise ukusebenzisa umoya-mpilo ne-hydrogen peroxide njengama-oxidants futhi ithembele ekukhanyeni kwe-ultraviolet (UV) ukuqalisa ukubola nokubola kwezinto ezingcolisayo. Lokhu kwakamuva, okwaziwa ngokuthi i-photocatalytic oxidation, ngokuvamile kungahlukaniswa njenge-homogeneous and heterogeneous catalysis.
Ekonakalisweni okuhlukahlukene kwe-photocatalytic, inani elithile lezinto ezibonakalayo ze-photocatalytic semiconductor zethulwa ohlelweni olungcolile, kuhlanganiswe nenani elithile lemisebe yokukhanya. Lokhu kubangela isasasa lamapheya "e-electron-hole" endaweni ye-photosensitive semiconductor ngaphansi kokuchayeka ekukhanyeni. I-oxygen encibilikisiwe, ama-molecule amanzi, nezinye izinto ezikhangiswe ku-semiconductor zisebenzisana nalawa mapheya "e-electron-hole", agcina amandla engeziwe. Lokhu kuvumela izinhlayiya ze-semiconductor ukuthi zinqobe izithiyo zokusabela kwe-thermodynamic futhi zisebenze njengama-catalysts ekuphenduleni okuhlukahlukene kwe-catalytic, okukhiqiza ama-radicals ane-oxidative kakhulu njenge-•HO. Lawa ma-radicals abe esesiza ukucekelwa phansi kwezinto ezingcolisayo ngezinqubo ezifana nokwengezwa kwe-hydroxyl, ukufaka esikhundleni, nokudluliswa kwama-electron.
Izindlela ze-Photochemical oxidation zifaka i-photosensitized oxidation, i-photoexcited oxidation, kanye ne-photocatalytic oxidation. I-Photochemical oxidation ihlanganisa i-chemical oxidation nemisebe ukuze kuthuthukiswe izinga namandla oksijini wokusabela kwe-oxidation uma kuqhathaniswa ne-chemical oxidation ngayinye noma ukwelashwa ngemisebe. Ukukhanya kwe-Ultraviolet kuvame ukusetshenziswa njengomthombo wemisebe ku-photocatalytic oxidation.
Ukwengeza, inani elinqunyelwe kusengaphambili lama-oxidants njenge-hydrogen peroxide, i-ozone, noma izisusa ezithile kufanele zifakwe emanzini. Le ndlela iphumelela kakhulu ekukhipheni ama-molecule amancane, afana nodayi, okunzima ukuwehlisa futhi abe nobuthi. Ukusabela kwe-Photochemical oxidation kukhiqiza ama-radicals amaningi asebenza kakhulu emanzini, aphazamisa kalula ukwakheka kwezinhlanganisela eziphilayo.
Isikhathi sokuthumela: Sep-07-2023
