ʻOkiʻi kiʻiʻeleʻele

ʻO nā ʻano hana hoʻoheheʻe kiʻi kiʻimika no ka hoʻohaumia ʻana o nā mea haumia e pili ana i ka catalytic a me ka non-catalytic photochemical oxidation. Hoʻohana pinepine ka mea mua i ka oxygen a me ka hydrogen peroxide ma ke ʻano he oxidants a hilinaʻi i ke kukui ultraviolet (UV) e hoʻomaka i ka hoʻoheheʻe ʻana a me ka decomposition o nā mea haumia. ʻO ka mea hope, i ʻike ʻia he photocatalytic oxidation, hiki ke hoʻokaʻawale ʻia he catalysis homogeneous a heterogeneous.

I loko o ka heterogeneous photocatalytic degradation, hoʻokomo ʻia kahi nui o nā mea semiconductor photosensitive i loko o ka ʻōnaehana polluted, i hui pū ʻia me kahi nui o ka radiation māmā. ʻO kēia ka hopena i ka hauʻoli o nā pālua "electron-hole" ma ka ʻili semiconductor photosensitive ma lalo o ka hoʻomālamalama māmā. ʻO ka oxygen i hoʻoheheʻe ʻia, nā molekele wai, a me nā mea ʻē aʻe i hoʻopili ʻia ma ka semiconductor e pili pū me kēia mau "electron-hole" paʻa, e mālama ana i ka ikehu keu. ʻO kēia ka mea e hiki ai i nā ʻāpana semiconductor ke lanakila i nā pale hoʻonā thermodynamic a hana ma ke ʻano he catalysts i nā hopena catalytic like ʻole, e hana ana i nā radical oxidative loa e like me •H O. A laila hoʻomaʻamaʻa kēia mau radical i ka hoʻohaʻahaʻa ʻana o nā mea haumia ma o nā kaʻina hana e like me ka hoʻohui hydroxyl, substitution, a me ka hoʻololi electron.

Hoʻopili ʻia nā ʻano hana hoʻokahe kiʻi kiʻi kiʻi kiʻi kiʻi kiʻi paʻi kiʻi, photoexcited oxidation, a me photocatalytic oxidation. Hoʻohui ʻia ka oxidation photochemical i ka oxidation kemika a me ka radiation e hoʻonui ai i ka nui a me ka hiki ke hoʻopaʻa ʻia o nā hopena oxidation i hoʻohālikelike ʻia me ka hoʻokaʻina kemika a i ʻole ka mālama radiation. Hoʻohana mau ʻia ke kukui Ultraviolet e like me ke kumu radiation i ka photocatalytic oxidation.

Hoʻohui ʻia, pono e hoʻokomo ʻia ka nui o nā oxidants e like me hydrogen peroxide, ozone, a i ʻole kekahi mau catalysts i loko o ka wai. He mea maikaʻi loa kēia ʻano hana no ka wehe ʻana i nā molekala liʻiliʻi, e like me nā mea pena, paʻakikī ke hoʻohaʻahaʻa a loaʻa i nā mea ʻona. Hoʻoulu ʻia nā mea hoʻoheheʻe Photochemical i nā radical reactive he nui i loko o ka wai, e hoʻopau koke i ke ʻano o nā mea hoʻohui.