Qhia:
Hauv kev tshawb fawb ntawm cov ntaub ntawv kev tshawb fawb,Titanium Dioxide(TiO2) tau tshwm sim raws li kev nyiam sib txuas nrog ntau cov ntawv thov. Qhov no sib txuas tau muaj cov tshuaj zoo heev thiab cov khoom siv lub cev, ua rau nws incaluable hauv ntau tus sectors. Txhawm rau kom nkag siab nws cov txiaj ntsig zoo, Titanium Dioxide cov qauv tsim nyog yuav tsum tau kawm hauv qhov tob. Hauv cov ncej blog, peb yuav tshawb txog cov qauv ntawm titanium dioxide thiab shed teeb rau cov laj thawj tseem ceeb tom qab nws cov khoom tshwj xeeb.
1. Crystal qauv:
Titanium Dioxide muaj cov qauv crystal, txiav txim siab feem ntau los ntawm nws cov kev qhia tshwj xeeb ntawm atoms. Txawm yogTos2Muaj peb ntu crystalline (anatase, rutile, thiab Brookite), peb yuav tsom rau ob daim ntawv feem ntau: rutile thiab anatase.
A. Rutile qauv:
Lub retile theem yog paub rau nws Tetriaonal Crystal Crystal Crystal, nyob rau hauv txhua qhov chaw ntawm cov pa atoms, tsim ib rab riam phom Octahedron. Cov txheej txheem no ua yeeb yam ntom ntom ntom txheej nrog lub kaw-ntim kev ua pa. Tus qauv no muab Rutile tshwj xeeb thiab kav ntev, ua rau nws haum rau ntau cov ntawv thov, suav nrog cov xim av, suav nrog pleev xim, thiab txawm tias muaj tshuaj pleev thaiv duab.
B. Anatase qauv:
Nyob rau hauv cov ntaub ntawv ntawm anatase, lub titanium atoms raug sib khi mus rau tsib oxygen atoms, ua cov estahedrons uas sib koom cov npoo. Yog li ntawd, cov kev teeb tsa no tau ua rau muaj cov qauv qhib ntau dua nrog tsawg dua atoms ib ntu ntim piv rau rutile. Txawm hais tias nws qis ntom ntom, anatase cov ntawv pov thawj zoo cov duab photocatalytic zoo nkauj, ua kom muaj cov yees duab huab cua thiab ntxuav cov txheej txheem huab cua thiab ntxuav cov txheej txheem ua kom huv.
2. Lub zog band sib txawv:
Lub zog band sib txawv yog lwm tus yam ntxwv tseem ceeb ntawm TiO2 thiab ua rau nws cov khoom tshwj xeeb. Qhov kev sib tw no txiav txim siab cov khoom siv hluav taws xob thiab nws cov rhiab rau kev nqus lub teeb.
A. Retile band qauv:
Rutile tio2Muaj ib qho kev sib tw sib kis nqaim ntawm kwv yees li 3.0 eV, ua rau nws muaj feem cuam tshuam nrog tus neeg saib xyuas hluav taws xob. Txawm li cas los xij, nws cov qauv band tuaj yeem nqus tau cov teeb tsa (UV), ua rau nws siv rau hauv UV tiv thaiv xws li tshuaj pleev thaiv hnub.
B. Anatase Band qauv:
Anatase, ntawm qhov tod tes, ua kom pom cov hlua dav dav dav hlau ntawm kwv yees li 3.2 ev. Cov xeeb ceem no muab anationase tio2 zoo heev photocatalytic kev ua si. Thaum raug rau lub teeb, hluav taws xob hauv txoj hlua valence zoo siab heev thiab dhia mus rau hauv txoj hlua conduction, ua rau ntau cov oxidation thiab txo cov tshuaj tiv thaiv kom tshwm sim. Cov khoom siv qhib lub qhov rooj rau cov ntawv thov xws li cov dej huv thiab huab cua ua qias tuaj.
3. Tsis xws luag thiab hloov kho:
TusTus qauv ntawm Tii2yog tsis yog tsis muaj qhov khuam. Cov tsis xws luag thiab hloov kho cuam tshuam ntau yam cuam tshuam rau lawv lub cev thiab tshuaj lom neeg.
A. Oxygen Vacancies:
Qhov tsis xws luag nyob rau hauv daim ntawv ntawm Oxygen paub nyob rau hauv Ti ~ concentration kev ua haujlwm, ua rau kev ua kom muaj kev ua haujlwm ntxiv thiab tsim cov chaw xim xim.
B. Deg Kev Hloov Deg:
Tswj cov khoom hloov kho thaj chaw, xws li doping nrog lwm cov kev hloov cov hlau ions lossis ua haujlwm nrog cov organic sib txuas, tuaj yeem txhim khu qee qhov khoom ntawm Ti2. Piv txwv li, doping nrog hlau xws li platinum tuaj yeem txhim kho nws cov kev ua tau zoo heev, thaum muaj cov khoom siv ua haujlwm los txhim kho cov khoom ruaj khov thiab kev yees duab.
Hauv kev xaus:
Nkag siab txog tus qauv txawv tshaj plawary ntawm TiS2 yog qhov tseem ceeb kom nkag siab nws cov yam ntxwv zoo nkauj thiab ntau ntawm cov kev siv. Txhua daim ntawv crystalline ntawm TiO2 muaj cov khoom muaj txiaj ntsig, los ntawm Tetranconal Rutile cov qauv rau qhov qhib, photocatytically cov khoom siv anatase. Los ntawm kev tshawb nrhiav band nkhaus thiab tsis xws luag, cov kws tshawb fawb tuaj yeem ua kom zoo dua lawv cov cuab yeej siv los ntawm cov txheej txheem lim dej kom muaj zog sau. Raws li peb txuas ntxiv daws cov tsis zais ntawm titanium dioxide, nws muaj peev xwm hauv kev lag luam kev hloov pauv tseem muaj kev cog lus.
Lub Sijhawm Post: Oct-30-2023