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Zirconia‐Pillaring in Layered HNb 3 O 8 and HNbMoO 6
Author(s) -
Wang ShuoFeng,
Liu ShuMin,
Li BaoJun,
Guo XianJi
Publication year - 2020
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.202000779
Subject(s) - cubic zirconia , zirconium , materials science , intercalation (chemistry) , niobium , chemical engineering , diethylene glycol , inorganic chemistry , ion exchange , composite material , chemistry , metallurgy , ion , ceramic , ethylene glycol , organic chemistry , engineering
In this work, the pillaring of two layered niobium‐based oxides (HNb 3 O 8 and HNbMoO 6 ) with zirconia was investigated in detail. Two novel zirconia‐pillared layered metal oxides, zirconia‐pillared layered HNb 3 O 8 and zirconia‐pillared layered HNbMoO 6 , have been successfully prepared. Both pillared products exhibited a higher thermal stability exceeding 673 K. For the pillaring of layered HNb 3 O 8 , two different pre‐expanding agents, 1‐dodecanamine and 1,12 ‐dodecanediamine, were alternatively used, and two kinds of zirconium‐pillaring solutions containing zirconium(IV) polyoxocations obtained through two different ways were employed. The 1,12 ‐dodecanediamine‐pre‐expanded layered intermediate was applicable and 1‐dodecanamine‐pre‐expanded one was not applicable to the intercalation of zirconium(IV) polyoxocations in interlayer regions of the layered niobium‐based oxides. More interestingly, the zirconium‐pillaring solutions prepared by using an appropriate amount of diethylene glycol as stabilizing agent was advantage for constructing the ordered zirconia‐pillared product, whereas the zirconium‐pillaring solutions obtained in the case of absence of diethylene glycol seemed not to conduct well an ions‐exchange reaction with the alkylamine‐pre‐expanded layered intermediates. The order degree of zirconia‐pillared layered transition metal oxides was closely related to the host sheets. The zirconia‐pillared layered HNb 3 O 8 contained more defects, while the zirconia‐pillared layered HNbMoO 6 had fewer defects.