Yazisa:
Kwinkalo yesayensi yezinto,titanium dioxide(TiO2) iye yavela njengento ekhangayo kunye noluhlu olubanzi lwezicelo.Le khompawundi ineepropathi ezigqwesileyo zeekhemikhali kunye nezomzimba, iyenza ixabiseke kakhulu kumacandelo amashishini amaninzi.Ukuze uqonde ngokupheleleyo iimpawu zayo ezikhethekileyo, ubume be-titanium dioxide obunomtsalane kufuneka bufundwe nzulu.Kule post blog, siza kuphonononga ubume be-titanium dioxide kwaye sikhanyise ngezizathu ezisisiseko emva kweempawu zayo ezikhethekileyo.
1. Ubume bekristale:
I-Titanium dioksidi inesakhiwo sekristale, esimiselwe ngokuyintloko lulungiselelo olukhethekileyo lweeathom.NangonaI-TiO2inezigaba ezintathu ze-crystalline (i-anatase, i-rutile, kunye ne-brookite), siya kugxininisa kwiifom ezimbini eziqhelekileyo: i-rutile kunye ne-anatase.
A. Rutile Ulwakhiwo:
Isigaba se-rutile saziwa nge-tetragonal crystal structure, apho i-athomu ye-titanium nganye ijikelezwe zii-athom ze-oksijini ezintandathu, zenza i-octahedron ejijekileyo.Eli lungiselelo lenza umaleko oshinyeneyo weathom nolungelelwaniso olusondeleyo lweoksijini.Esi sakhiwo sinika irutile uzinzo olukhethekileyo kunye nokuqina, oko kuyenza ilungele usetyenziso olwahlukeneyo, kubandakanywa ipeyinti, iiseramics, kunye nesunscreen.
B. Isakhiwo se-Anatase:
Kwimeko ye-anatase, iiathom ze-titanium zibotshelelwa kwiiathom zeoksijini ezintlanu, zenze ii-octahedron ezabelana ngemiphetho.Ke ngoko, olu lungiselelo lukhokelela kwisakhiwo esivulekileyo esineathom ezimbalwa kwiyunithi nganye xa kuthelekiswa nerutile.Nangona ubuninzi bayo obuphantsi, i-anatase ibonisa iimpawu ezibalaseleyo ze-photocatalytic, okwenza kube yinto ebalulekileyo kwiiseli zelanga, iinkqubo zokucoca umoya kunye neengubo zokuzicoca.
2. Isikhewu sebhendi yamandla:
I-gap yebhendi yamandla yenye into ebalulekileyo ye-TiO2 kwaye inegalelo kwiipropati zayo ezizodwa.Esi sikhewu simisela ukuhanjiswa kombane kunye novakalelo lwaso ekufunxeni kokukhanya.
A. Ulwakhiwo lwebhendi yeRutile:
Rutile TiO2inomsantsa omxinwa webhendi omalunga ne-3.0 eV, iwenza umqhubi wombane olinganiselweyo.Nangona kunjalo, ukwakheka kwebhendi yayo inokufunxa ukukhanya kwe-ultraviolet (UV), iyenze ilungele ukusetyenziswa kwizikhuseli ze-UV ezifana ne-sunscreen.
B. Isakhiwo sebhendi ye-Anatase:
UAnatase, kwelinye icala, ubonisa umsantsa obanzi webhendi omalunga ne-3.2 eV.Olu phawu lunika i-anatase TiO2 umsebenzi ogqwesileyo we-photocatalytic.Xa evezwe ekukhanyeni, ii-electron ezikwibhendi ye-valence ziyavuya kwaye zitsibe kwibhendi yokuqhuba, nto leyo ebangela ukuba kwenzeke i-oxidation eyahlukeneyo kunye nokuncipha kokusabela.Ezi zakhiwo zivula umnyango kwizicelo ezifana nokucocwa kwamanzi kunye nokunciphisa ukungcoliseka komoya.
3. Iziphene kunye noHlengahlengiso:
Iubume beTio2alinaziphene.Ezi ziphene kunye nokuguqulwa kuchaphazela kakhulu iimpawu zabo zomzimba kunye neekhemikhali.
A. Izithuba zeoksijini:
Iziphene ngendlela yezithuba ze-oxygen ngaphakathi kwe-TiO2 lattice yazisa ukuxinwa kwee-electron ezingasebenziyo, okukhokelela ekunyuseni komsebenzi we-catalytic kunye nokwakhiwa kwamaziko ombala.
B. Ukulungiswa komphezulu:
Ukuguqulwa komgangatho olawulwayo, okufana ne-doping kunye nezinye ii-ion zetsimbi zenguqu okanye ukusebenza kunye ne-organic compounds, kunokuphucula ngakumbi iimpawu ezithile ze-TiO2.Ngokomzekelo, i-doping ngesinyithi njengeplatinam inokuphucula ukusebenza kwayo, ngelixa amaqela asebenzayo e-organic enokuphucula uzinzo kunye nokusebenza kwefoto.
Ukuququmbela:
Ukuqonda isakhiwo esingaqhelekanga seTio2 kubalulekile ekuqondeni iimpawu zayo ezimangalisayo kunye noluhlu olubanzi lokusetyenziswa.Ifomu nganye ye-crystalline ye-TiO2 ineempawu ezizodwa, ukusuka kwisakhiwo se-tetragonal rutile ukuya kwi-open, photocatalytically active phase anatase.Ngokuphonononga izikhewu zebhendi yamandla kunye neziphene ngaphakathi kwemathiriyeli, izazinzulu zinokunyusa ngakumbi iipropathi zazo zokusetyenziswa ukusuka kubuchule bokucoca ukuya ekuvuneni amandla.Njengoko siqhubeka nokutyhila iimfihlelo ze-titanium dioxide, amandla ayo kwi-revolution yezoshishino ahlala ethembisa.
Ixesha lokuposa: Oct-30-2023