O metotia o le fa'a'okesaita photochemical mo le fa'aleagaina o mea fa'aleagaina e aofia ai faiga e aofia ai le fa'a'okesaita photochemical catalytic ma le non-catalytic. O le muamua e masani ona fa'aogaina le okesene ma le hydrogen peroxide o ni oxidants ma fa'alagolago i le malamalama ultraviolet (UV) e amata ai le fa'a'okesaita ma le fa'aleagaina o mea fa'aleagaina. O le mulimuli, e ta'ua o le fa'a'okesaita photocatalytic, e mafai ona fa'avasegaina o ni catalysis homogeneous ma heterogeneous.
I le fa'aleagaina eseese o le photocatalytic, o se aofa'iga patino o mea semiconductor photosensitive e fa'aofiina i totonu o le faiga ua fa'aleagaina, fa'atasi ai ma se aofa'iga patino o le malamalama. O lenei mea e mafua ai le fa'aosofia o paga "electron-hole" i luga o le semiconductor photosensitive i lalo o le malamalama. O le okesene ua liu suavai, molela'au vai, ma isi mea o lo'o pipii i luga o le semiconductor e fegalegaleai ma nei paga "electron-hole", ma teuina ai le malosi tele. O lenei mea e mafai ai e vaega o le semiconductor ona fa'ato'ilaloina fa'alavelave fa'avevela ma galue o ni mea fa'atupu fa'alavelave i le tele o fa'alavelave fa'atupu fa'alavelave, e fa'atupuina ai ni radicals e maualuga le oxidative e pei o le •HO. Ona fa'afaigofieina lea e nei radicals le fa'aleagaina o mea fa'aleagaina e ala i faiga e pei o le fa'aopoopoga hydroxyl, suiga, ma le fesiitaiga o eletise.
O metotia o le fa'a'okesaine fa'a-photochemical e aofia ai le fa'a'okesaine fa'a-photosensitized, fa'a'okesaine fa'a-photoexcited, ma le fa'a'okesaine fa'a-photocatalytic. O le fa'a'okesaine fa'a-photochemical e tu'ufa'atasia ai le fa'a'okesaine fa'a-chemical ma le fa'asalalauina o le radiation e fa'aleleia atili ai le saoasaoa ma le gafatia fa'a'okesaine o tali fa'a'okesaine pe a fa'atusatusa i le fa'a'okesaine fa'a-chemical ta'itasi po'o le togafitiga fa'asalalauina o le radiation. E masani ona fa'aaogaina le malamalama ultraviolet o se puna o fa'asalalauina i le fa'a'okesaine fa'a-photocatalytic.
E le gata i lea, e tatau ona fa'aofi i totonu o le vai se aofa'iga ua fuafuaina muamua o mea e fa'aola ai le ea e pei o le hydrogen peroxide, ozone, po'o ni mea fa'aola patino. E matua aoga tele lenei metotia mo le aveeseina o molela'au laiti, e pei o vali, e faigata ona fa'aleagaina ma e o'ona. O tali atu i le fa'aola o le ea e mafua ai le tele o mea e matua tali atu i le vai, lea e faigofie ona fa'alavelaveina ai le fausaga o mea fa'aola.
Taimi na lafoina ai: Setema-07-2023
