Synthesis of Mesoporous Silica at Room Temperature and Near-neutral pH with EDTANa2 as Mineralization Agent

Chem. J. Chinese Universities

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Synthesis of Mesoporous Silica at Room Temperature and Near-neutral pH with EDTANa₂ as Mineralization Agent

XIAO Qiang¹, WANG Jin-Gui¹, GAO Di¹, SUN Ping-Chuan¹, YUAN Zhong-Yong¹, CHEN Tie-Hong¹, LI Bao-Hui², DING Da-Tong²

1. College of Chemistry,
2. College of Physics, Nankai University, Tianjin 300071, China

Received:2005-11-15 Revised:1900-01-01 Online:2006-08-10 Published:2006-08-10
Contact: CHEN Tie-Hong

Abstract

Abstract: Using EDTANa₂ as mineralization agent, mesoporous silicas with wormlike mesopores and thick pore wall(about 3 nm) were facilely synthesized at room temperature and near-neutral pH. The mesoporous silica can be obtained with reactants molar composition range of n(CTAB):n(TEOS):n(EDTANa₂):n(H₂O)=(0.05—0.2):(0.1—2):(0.1—0.5):(100—500). XRD, N₂ sorption, FTIR, SEM and TEM methods were carried out to investigate the topological and morphological properties of the mesoporous silicas. As the amount of CTAB increased, the d spacing value of mesoporous silica increased correspondingly. Temperature has a great effect on the synthesis of mesoporous silica. When temperature increased from 2 ℃ to 20 ℃, morphologies of the mesoporous silica varied from hollow micro-tubes to granule aggregates. Based on the experiments, a modified neutral mechanism of (S⁺-E^-)⁰-I⁰ was proposed.

Key words: Mesoporous silica, Neutral pH, Room temperature, Thick-wall, EDTANa₂

CLC Number:

O614

TrendMD:

XIAO Qiang¹, WANG Jin-Gui¹, GAO Di¹, SUN Ping-Chuan¹, YUAN Zhong-Yong¹, CHEN Tie-Hong¹, LI Bao-Hui², DING Da-Tong². Synthesis of Mesoporous Silica at Room Temperature and Near-neutral pH with EDTANa₂ as Mineralization Agent[J]. Chem. J. Chinese Universities, doi: .

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Synthesis of Mesoporous Silica at Room Temperature and Near-neutral pH with EDTANa₂ as Mineralization Agent

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