STRUCTURAL PROPERTIES OF MANGANESE-FUNCTIONALIZED SILICA AEROGELS
0.01 contain manganese as manganese oxides.
Secondly, manganese-functionalized aerogels (MnAEG) with a molar ratio Mn/Si = 0.005–0.02, were prepared according to the acid-base of the sol-gel polymerization of a tetraethylorthosilicate precursor, which is followed in combination with a supercritical drying using CO2. The prepared materials were characterized using the following techniques: X-ray powder diffraction (XRD), energy-dispersive X-ray elemental analysis (EDX), nitrogen physisorption, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The characterization results on manganese-functionalized aerogels (MnAEG) showed Mn oxide nanoparticles incorporated into the aerogel already at a low Mn concentration (Mn/Si = 0.005), which means that Mn aerogels are not promising silica supports for Mn catalysts applied for water cleaning, because they do not contain isolated Mn sites.]]>
0,01vsebujeta mangan v obliki manganovih oksidov.
Z manganom - funkcionalizirane silikatne aerogele (MnAEG) z molskim razmerjem Mn/Si = 0.005–0.02 sem pripravila s kislinsko – bazično sol-gel polimerizacijo tetraetilortosilikatnega prekurzorja v kombinaciji z superkritičnim sušenjem z CO2. Pripravljene materiale sem okarakterizirala z rentgensko praškovno difrakcijo (XRD), dušikovo fizisorpcijo, elementno analizo (EDX), vrstičnim elektronskim mikroskopom (SEM) in presevnim elektronskim mikroskopom (TEM). Karakterizacijske metode so pokazale, da je mangan v silikatnih aerogelih (MnAEG) prisoten v obliki nanodelcev manganovega oksida in ne kot mangan na izoliranih mestih že pri zelo nizkem Mn/Si molskem razmerju (Mn/Si = 0.005).To pomeni, da manganovi aerogeli niso obetavni katalizatorji za čiščenje vode.]]>
2016
2016-08-31 14:11:34
1033
: SiO2 aerogels, manganese-functionalized SiO2 aerogels, sol–gel process, CO2 supercritical drying
SiO2, manganovi SiO2 aerogeli, sol–gel postopek, superkritično sušenje s CO2
m2
Nataša
Novak Tušar
991
Tatjana
Kobal
70
COBISS_ID
3
4488443
NUK URN
18
URN:SI:UNG:REP:NUYSHZ8W
Tatjana_Kobal.pdf
4577489
Predstavitvena datoteka
2016-08-31 14:14:07