The role of solvent preparation in soft template assisted synthesis of mesoporous alumina

Wu, Wei1,2; Zhu, Mingming2; Zhang, Dongke2

2018-04

10.1016/j.micromeso.2017.10.017

MICROPOROUS AND MESOPOROUS MATERIALS   影响因子和分区

1387-1811

1873-3093

Synthesis of mesoporous aluminas (MM) in aqueous and alcoholic solutions in soft template assisted sol-gel process was systematically studied with a particular attention to the role of the initial solvent preparation. Two synthesis pathways were employed, namely, the aqueous phase synthesis in water and water/ethanol mixtures and the solvent evaporation-induced self-assembly (EISA) synthesis in alcohols (ethanol, isopropanol and n-butanol). The results showed that in all the reaction mediums, the hydrolysis of aluminium isopropoxide played a crucial role. Decreasing water proportion reduced the hydrolysis rate of aluminium isopropoxide and consequently led to a more uniform stacking of the boelunite colloids formed and narrower the pore size distribution (PSD), higher surface area and greater pore volume of the MA synthesized. For the EISA pathway conducted in alcohols, the tardiness and incompleteness of hydrolysis in isopropanol provoked a random stacking of the aluminium precursor species, resulted in a disordered mesoporosity and a broad PSD. Under the experimental conditions studied for the EISA pathway, the addition of 3.0 mL HNO3 per 20 mmol of aluminium isopropoxide in ethanol favoured the formation of a uniform MA with very narrow PSD.

Mesoporous alumina Boehmite Solvent effect EISA Structural properties

SCI ; EI

英语

第一 ; 通讯

Australian Research Council (ARC)[LP100200135] ; Australian Research Council (ARC)[LP100200136]

Chemistry ; Science & Technology - Other Topics ; Materials Science

Chemistry, Applied ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:000426228300002

ELSEVIER SCIENCE BV

20174304311018

Alumina ; Aluminum oxide ; Corundum ; Ethanol ; Hydrolysis ; Mesoporous materials ; Pore size ; Self assembly ; Sol-gel process ; Structural properties

Minerals:482.2 ; Chemical Reactions:802.2 ; Organic Compounds:804.1 ; Inorganic Compounds:804.2 ; Glass:812.3 ; Materials Science:951

MATERIALS SCIENCE

Web of Science

1.South Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
2.Univ Western Australia, Ctr Energy M473, 35 Stirling Highway, Crawley, WA 6009, Australia

Wu, Wei,Zhu, Mingming,Zhang, Dongke. The role of solvent preparation in soft template assisted synthesis of mesoporous alumina[J]. MICROPOROUS AND MESOPOROUS MATERIALS,2018,260:9-16.

Wu, Wei,Zhu, Mingming,&Zhang, Dongke.(2018).The role of solvent preparation in soft template assisted synthesis of mesoporous alumina.MICROPOROUS AND MESOPOROUS MATERIALS,260,9-16.

Wu, Wei,et al."The role of solvent preparation in soft template assisted synthesis of mesoporous alumina".MICROPOROUS AND MESOPOROUS MATERIALS 260(2018):9-16.