The investigation of an organic acid assisted sol-gel method for preparing monolithic zirconia aerogels

Xiaoqing Wang; Chengyuan Li; Zhenyu Shi; Mingjia Zhi; Zhanglian Hong

doi:10.1039/c7ra13041d

The investigation of an organic acid assisted sol-gel method for preparing monolithic zirconia aerogels

Xiaoqing Wang
, Chengyuan Li
, Zhenyu Shi
, Mingjia Zhi^*
, Zhanglian Hong

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

40 Citations (Scopus)

10 Downloads (CityUHK Scholars)

Abstract

In our previous work, a citric acid assisted sol-gel method was developed for preparing monolithic metal oxide aerogels. Such method adopted citric acid as the gelator, which replaced the well-studied proton scavenger propylene oxide. In this work, we have further extended this "organic acid assisted" sol-gel method and investigated the gelation mechanism. Four different organic acids (butanedioic acid, l-malic acid, l-aspartic acid and mercaptosuccinic acid) with an identical main chain but different side groups were used as the gelators for preparing monolithic zirconia aerogels. It was found that complex interactions including covalent bond and coordination bond interactions between organic acids and zirconium ions were vital to give a rigid gel network. After supercritical drying, crystalline zirconia aerogels can be obtained with high surface areas over 330 m² g^-1 and large pore volumes over 3.574 cm³ g^-1. © The Royal Society of Chemistry 2018.

Original language	English
Pages (from-to)	8011-8020
Journal	RSC Advances
Volume	8
Issue number	15
DOIs	https://doi.org/10.1039/c7ra13041d
Publication status	Published - 2018
Externally published	Yes

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title = "The investigation of an organic acid assisted sol-gel method for preparing monolithic zirconia aerogels",

abstract = "In our previous work, a citric acid assisted sol-gel method was developed for preparing monolithic metal oxide aerogels. Such method adopted citric acid as the gelator, which replaced the well-studied proton scavenger propylene oxide. In this work, we have further extended this {"}organic acid assisted{"} sol-gel method and investigated the gelation mechanism. Four different organic acids (butanedioic acid, l-malic acid, l-aspartic acid and mercaptosuccinic acid) with an identical main chain but different side groups were used as the gelators for preparing monolithic zirconia aerogels. It was found that complex interactions including covalent bond and coordination bond interactions between organic acids and zirconium ions were vital to give a rigid gel network. After supercritical drying, crystalline zirconia aerogels can be obtained with high surface areas over 330 m2 g-1 and large pore volumes over 3.574 cm3 g-1. {\textcopyright} The Royal Society of Chemistry 2018.",

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T1 - The investigation of an organic acid assisted sol-gel method for preparing monolithic zirconia aerogels

AU - Wang, Xiaoqing

AU - Li, Chengyuan

AU - Shi, Zhenyu

AU - Zhi, Mingjia

AU - Hong, Zhanglian

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2018

Y1 - 2018

N2 - In our previous work, a citric acid assisted sol-gel method was developed for preparing monolithic metal oxide aerogels. Such method adopted citric acid as the gelator, which replaced the well-studied proton scavenger propylene oxide. In this work, we have further extended this "organic acid assisted" sol-gel method and investigated the gelation mechanism. Four different organic acids (butanedioic acid, l-malic acid, l-aspartic acid and mercaptosuccinic acid) with an identical main chain but different side groups were used as the gelators for preparing monolithic zirconia aerogels. It was found that complex interactions including covalent bond and coordination bond interactions between organic acids and zirconium ions were vital to give a rigid gel network. After supercritical drying, crystalline zirconia aerogels can be obtained with high surface areas over 330 m2 g-1 and large pore volumes over 3.574 cm3 g-1. © The Royal Society of Chemistry 2018.

AB - In our previous work, a citric acid assisted sol-gel method was developed for preparing monolithic metal oxide aerogels. Such method adopted citric acid as the gelator, which replaced the well-studied proton scavenger propylene oxide. In this work, we have further extended this "organic acid assisted" sol-gel method and investigated the gelation mechanism. Four different organic acids (butanedioic acid, l-malic acid, l-aspartic acid and mercaptosuccinic acid) with an identical main chain but different side groups were used as the gelators for preparing monolithic zirconia aerogels. It was found that complex interactions including covalent bond and coordination bond interactions between organic acids and zirconium ions were vital to give a rigid gel network. After supercritical drying, crystalline zirconia aerogels can be obtained with high surface areas over 330 m2 g-1 and large pore volumes over 3.574 cm3 g-1. © The Royal Society of Chemistry 2018.

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DO - 10.1039/c7ra13041d

M3 - RGC 21 - Publication in refereed journal

C2 - 35542027

SN - 2046-2069

VL - 8

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EP - 8020

JO - RSC Advances

JF - RSC Advances

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The investigation of an organic acid assisted sol-gel method for preparing monolithic zirconia aerogels

Abstract

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