TY - JOUR
T1 - Comprehensive studies on phosphoric acid treatment of porous titania toward titanium phosphate and pyrophosphate monoliths with pore hierarchy and a nanostructured pore surface
AU - Zhu, Yang
AU - Hasegawa, George
AU - Kanamori, Kazuyoshi
AU - Nakanishi, Kazuki
N1 - Funding Information:
This work was financially supported by the Advanced Low Carbon Technology Research and Development Program (ALCA, JST Japan), Japan Society for the Promotion of Science (JSPS) KAKENHI Grant Numbers JP26288106, 16K05935 and 15J00156.
Publisher Copyright:
© 2018 the Partner Organisations.
PY - 2018/6
Y1 - 2018/6
N2 - Simple post-treatments of the porous titania monolith in varied concentrations of phosphoric acid solution provide a series of monolithic titanium phosphates (TiPs) with a hierarchically porous structure together with an exquisite macropore surface. Depending on the reaction conditions, platy crystallites composed of either Ti2O3(H2PO4)2·2H2O, Ti(HPO4)2·H2O (α-TiP), or Ti2O(PO4)2·2H2O (π-TiP) are generated on the macropore skeleton via a dissolution and reprecipitation process, which forms distinct wrinkled surface morphologies. In addition, the treatments effectively suppress the shrinkage during drying, leading to lower bulk density. Post-calcination in air yields porous titanium pyrophosphates preserving the intricate porous architecture in some cases. Notably, the hierarchically porous TiP2O7 monoliths prepared from the α-TiP precursors have a good thermal robustness related to bulk density.
AB - Simple post-treatments of the porous titania monolith in varied concentrations of phosphoric acid solution provide a series of monolithic titanium phosphates (TiPs) with a hierarchically porous structure together with an exquisite macropore surface. Depending on the reaction conditions, platy crystallites composed of either Ti2O3(H2PO4)2·2H2O, Ti(HPO4)2·H2O (α-TiP), or Ti2O(PO4)2·2H2O (π-TiP) are generated on the macropore skeleton via a dissolution and reprecipitation process, which forms distinct wrinkled surface morphologies. In addition, the treatments effectively suppress the shrinkage during drying, leading to lower bulk density. Post-calcination in air yields porous titanium pyrophosphates preserving the intricate porous architecture in some cases. Notably, the hierarchically porous TiP2O7 monoliths prepared from the α-TiP precursors have a good thermal robustness related to bulk density.
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U2 - 10.1039/c8qi00146d
DO - 10.1039/c8qi00146d
M3 - Article
AN - SCOPUS:85048386458
VL - 5
SP - 1397
EP - 1404
JO - Inorganic Chemistry Frontiers
JF - Inorganic Chemistry Frontiers
SN - 2052-1545
IS - 6
ER -