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Facile preparation of macro-mesoporous zirconium titanate monoliths via a sol–gel reaction accompanied by phase separation

Published online by Cambridge University Press:  30 September 2019

Mingliang Sun ,
Tianbo Zhao ,
Zhaofei Ma  and
Zunfeng Li
Mingliang Sun
Affiliation:
Key Laboratory of Cluster Science of Ministry of Education, Beijing Institute of Technology, Beijing 102488, China
Tianbo Zhao*
Affiliation:
Key Laboratory of Cluster Science of Ministry of Education, Beijing Institute of Technology, Beijing 102488, China
Zhaofei Ma
Affiliation:
Key Laboratory of Cluster Science of Ministry of Education, Beijing Institute of Technology, Beijing 102488, China
Zunfeng Li
Affiliation:
Key Laboratory of Cluster Science of Ministry of Education, Beijing Institute of Technology, Beijing 102488, China
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Macro-mesoporous zirconium titanate monoliths have been successfully prepared via a sol–gel process accompanied by phase separation, with poly(ethylene oxide) (PEO) as a phase separation inducer and N-methylformamide (NFA) as a gelation accelerator. The size and morphology of macropores are controlled by the PEO and NFA amount. By choosing appropriate starting composition, the co-continuous structure could be obtained. The as-dried gel is amorphous, the pore size is in the range of 0.05–0.5 μm, the porosity is 46%, and the surface area is 111 m2/g. After heat treatment at 500 °C, the gel transforms into the phase ZrTiO4, the macropore diameter decreases slightly, the porosity increases to 63%, and the surface area decreases to 40 m2/g. Moreover, the macroporous structure is well maintained, and the skeleton becomes dense and smooth. The samples have macropores, mesopores, and micropores before and after heat treatment.

Keywords

sol–gelporosityoxide
Type
Article
Information
Journal of Materials Research , Volume 34 , Issue 24 , 30 December 2019 , pp. 4066 - 4075
Copyright
Copyright © Materials Research Society 2019 

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