Iindlela ze-Photochemical oxidation zokuthotywa kwezinto ezingcolisayo ziquka iinkqubo ezibandakanya zombini i-catalytic kunye ne-non-catalytic photochemical oxidation. Eyangaphambili isoloko isebenzisa ioksijini kunye nehydrogen peroxide njengezixube kwaye ixhomekeke kukukhanya kwe-ultraviolet (UV) ukuqalisa i-oxidation kunye nokubola kwezinto ezingcolisayo. Le yokugqibela, eyaziwa ngokuba yi-photocatalytic oxidation, ingahlelwa ngokubanzi njenge-homogeneous kunye ne-heterogeneous catalysis.
Kwi-heterogeneous photocatalytic degradation, umlinganiselo othile we-photosensitive semiconductor material ungeniswa kwinkqubo engcolileyo, idibaniswe nomlinganiselo othile wemitha yokukhanya. Oku kubangela uchulumanco lwezibini "ze-electron-hole" kumphezulu we-photosensitive semiconductor phantsi kokuvezwa kokukhanya. Ioksijini enyibilikileyo, iimolekyuli zamanzi, kunye nezinye izinto ezibhengezwa kwi-semiconductor zinxibelelana nezi zibini "ze-electron-hole", zigcina amandla angaphezulu. Oku kuvumela amasuntswana e-semiconductor ukuba oyise imiqobo yokusabela kwe-thermodynamic kwaye asebenze njenge-catalysts kwi-catalyst reactions ezahlukeneyo, ukuvelisa ii-radicals eziphezulu ze-oxidative ezifana ne- •HO. Ezi radicals ke ziququzelele ukuthotywa kwezinto ezingcolisayo ngeenkqubo ezinjengokongezwa kwe-hydroxyl, ukutshintshwa, kunye nokudluliselwa kwe-electron.
Iindlela ze-Photochemical oxidation ziquka i-photosensitized oxidation, i-photoexcited oxidation, kunye ne-photocatalytic oxidation. I-Photochemical oxidation idibanisa i-chemical oxidation kunye ne-radiation ukunyusa izinga kunye nomthamo we-oxidative we-oxidation reactions xa kuthelekiswa ne-chemical oxidation okanye unyango lwe-radiation. Ukukhanya kwe-Ultraviolet ngokuqhelekileyo kusetyenziswa njengomthombo wemitha kwi-photocatalytic oxidation.
Ukongeza, isixa esimiselweyo seoksijini efana ne-hydrogen peroxide, i-ozone, okanye izinto ezithile ezincedisayo kufuneka zifakwe emanzini. Le ndlela iyasebenza kakhulu ekususeni iimolekyuli ezincinci zezinto eziphilayo, ezinje ngedayi, ekunzima ukuzithobisa kwaye zinetyhefu. Iimpendulo ze-Photochemical oxidation zivelisa iiradicals ezininzi ezisebenza kakhulu emanzini, eziphazamisa ngokulula ubume bezinto eziphilayo.
Ixesha lokuposa: Sep-07-2023
