Synthesis, characterization and catalytic activity of ordered macroporous silicas functionalized with organosulfur groups

Journal Article · Tue May 06 04:00:00 EDT 2008 · Materials Research Bulletin

OSTI ID:21143997

Quanzhou, Wu ^[1]; Jufang, Liao; Qiang, Yin; Yuguang, Li ^[2]

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1. School of Chinese Traditional Medicine, Guangzhou University of Chinese Medicine, Zhuangzhou, Guangdong 510006 (China)
2. School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Zhuangzhou, Guangdong 510275 (China)

Hybrid three-dimensionally ordered macroporous (3DOM) SiO{sub 2}-SO{sub 3}H materials with different S/Si ratio have been prepared by colloidal crystal templating method. The process involved preparation of 3DOM SiO{sub 2}-SH materials by co-condensation of (3-mercaptopropyl)triethoxysilane and tetraethoxysilane via sol-gel transformation, and following oxidation of -SH group to -SO{sub 3}H group by H{sub 2}O{sub 2}. Materials were characterized by scanning electron microscopy (SEM), Fourier transform infra-red spectrometer (FTIR), thermogravimetric analysis (TGA), and nitrogen adsorption measurement. SEM observation shows that the macropores are highly ordered with a typical 'surface-templated' structure. The surface area of 3DOM SiO{sub 2}-SH material is 25.1 m{sup 2}/g and SiO{sub 2}-SO{sub 3}H material is 18.6 m{sup 2}/g. Catalytic activity test shows that 3DOM SiO{sub 2}-SO{sub 3}H materials possess a high activity for the esterification of acetic acid and n-butanol, and the activity is increased with the amount of sulfur in the materials. This study provided significant results for developing new application of 3DOM materials.

• OSTI ID: 21143997
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 5 Vol. 43; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ACETIC ACID
ADSORPTION
BUILDING MATERIALS
BUTANOLS
CRYSTALS
ESTERIFICATION
FOURIER TRANSFORMATION
HYBRIDIZATION
HYDROGEN PEROXIDE
INFRARED SPECTRA
OXIDATION
SCANNING ELECTRON MICROSCOPY
SILICA
SILICON OXIDES
SOL-GEL PROCESS
SPECTROMETERS
SURFACE AREA
SURFACES
SYNTHESIS
THERMAL GRAVIMETRIC ANALYSIS