Synthesis of hollow organosiliceous spheres for volatile organic compound removal

Wang, Hongning, Tang, Mei, Han, Lu, Cao, Jianyu, Zhang, Zhihui, Huang, Weiqiu, Chen, Ruoyu and Yu, Chengzhong (2014) Synthesis of hollow organosiliceous spheres for volatile organic compound removal. Journal of Materials Chemistry A, 2 45: 19298-19307. doi:10.1039/c4ta02899f

Author Wang, Hongning
Tang, Mei
Han, Lu
Cao, Jianyu
Zhang, Zhihui
Huang, Weiqiu
Chen, Ruoyu
Yu, Chengzhong
Title Synthesis of hollow organosiliceous spheres for volatile organic compound removal
Journal name Journal of Materials Chemistry A   Check publisher's open access policy
ISSN 2050-7496
Publication date 2014-12-07
Year available 2014
Sub-type Article (original research)
DOI 10.1039/c4ta02899f
Open Access Status Not Open Access
Volume 2
Issue 45
Start page 19298
End page 19307
Total pages 10
Place of publication Cambridge, United Kingdom
Publisher R S C Publications
Collection year 2015
Language eng
Formatted abstract
Hollow organosiliceous sphere (HOS) materials have been successfully synthesized by a co-condensation method with tetraethylorthosilicate (TEOS) and organosilane (1,2-bis(triethoxysilyl)ethane, BTSE) as mixed silica sources under acidic conditions. The application of HOSs as adsorbents for the volatile organic compound (VOC) abatement was demonstrated. The HOSs were characterized by transmission electron microscopy (TEM), N2 sorption isotherms, FT-IR spectroscopy, thermogravimetric analysis (TGA) and X-ray photoelectron spectroscopy (XPS). The results indicated that all samples showed a uniform hollow mesostructure and the organic groups were chemically incorporated into the walls of HOSs. The static adsorption and stability behaviors of water vapor, n-hexane and 93# gasoline on HOSs were investigated, with commercial silica gel (SG) and activated carbon (AC) as references. It was found that the sample with an initial molar ratio BTSE/(BTSE + TEOS) of 25% (HOS-25%) had the largest VOC adsorption capacity (1.36 g g−1n-hexane and 1.35 g g−1 93# gasoline) and the smallest water vapor adsorption capacity (0.0120 g g−1) under static adsorption conditions. The dynamic adsorption behaviors of n-hexane on HOS-25% were evaluated via breakthrough curves. The dynamic adsorption capacities of n-hexane are in the following order: SG < AC < HOS-25% and the stability is in the order of AC < SG < HOS-25%. The larger dynamic VOC capacity of the HOSs may be attributed to the synergetic effect between the unique morphology and hybrid walls. The static and dynamic n-hexane and water vapor competitive adsorption results suggested that HOS-25% had a much higher adsorption tendency for VOCs over water vapor. The HOSs with high hydrophobicity, large VOC removal capacity and excellent recyclability show great potential for VOC controlling.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2015 Collection
Australian Institute for Bioengineering and Nanotechnology Publications
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