Extraordinary Adsorption Properties of Nano Porous Hydrophobic Silica Aerogels

Xiao Qing Wei; Xing Yuan Ni; Zhi Hua Zhang; Jun Shen; Ai Du; Guo Qing Zu

doi:10.4028/www.scientific.net/KEM.512-515.45

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 512-515Extraordinary Adsorption Properties of Nano Porous...

Extraordinary Adsorption Properties of Nano Porous Hydrophobic Silica Aerogels

Abstract:

The adsorption properties of hydrophobic silica aerogels were studied. Polyethoxy- disiloxanes (E-40), ethanol (EtOH), hydrogen fluoride (HF) were used as silican precursor, solvent and catalyst, respectively, followed by solvent substitution and surface modification to prepare silica aerogels. Scanning electronic microscopy, nitrogen adsorption analyzer, contact angle measurement and Fourier transform infrared spectroscopy were used to characterize the structure and properties of silica aerogels. The conclusion is that the silica aerogels are with good hydrophobicity and the gas adsorption capacities is excellent for toxic gases such as benzene and carbon tetrachloride, which is 2~3 times higher than that of activated carbon fiber (ACF) or granule of activated carbon (GAC). Moreover, the adsorption capacity for organic solvent is 20-30 times of its own weight, which is much larger than that of GAC or Poly vinyl alcohol (PVA). In addition, the adsorption capacity of silica aerogels remains almost the same value after two times of adsorption- desorption processes, which means that the process is recyclable, low-cost and environmental friendly.

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Key Engineering Materials (Volumes 512-515)

Pages:

45-48

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.512-515.45

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Online since:

June 2012

Authors:

Xiao Qing Wei, Xing Yuan Ni, Zhi Hua Zhang, Jun Shen, Ai Du, Guo Qing Zu

Keywords:

Adsorption Material, Ambient Pressure Drying, Hydrophobic, Silica Aerogels

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References

[1] X.Q. Guo, Y. Shun, J.Y. Xu, Study on the preparation of air purification resins and their adsorption properties, Ion exc adsorpt. 14(1998) 533-539.

Google Scholar

[2] G. Hong, Z.P. Zhong, Utilization of activated carbon fiber in environment protection, Energy Res util. 3(2003) 17-19.

Google Scholar

[3] D.R. Wang, Development and application of activated carbon nano fiber, Carbon. 1(2003) 35-41.

Google Scholar

[4] Y.Y. Zhang, W.H. Zhang, X.J. Zhang, Situation of activated carbon research and new development, Clean Coal Tech. 5(1999) 24-26.

Google Scholar

[5] M. Schmidt, F. Schwertfeger, Applications for silica aerogel products, J. Non Cryst. Solids. 225(1998), 364-368.

DOI: 10.1016/s0022-3093(98)00054-4

Google Scholar

[6] L.W. Hrubesh, Aerogel applications, J. Non-Cryst. Solids. 225(1998) 335-342.

Google Scholar

[7] G. Barillaro, A. Diligenti, G.Marola and L.M. Strambini, A silicon enystalline resistor with an adsorbing porous layer as gas sensor, Sensor Actuat B-Chem. 105(2005) 278-282.

DOI: 10.1016/s0925-4005(04)00447-2

Google Scholar

[8] Q. Sun, G.M. Wu, B. Zhou, Preparation of hydrophobic silica aerogel films on glass, J. Funct. Mater. 33(2002) 430-434.

Google Scholar

[9] J. Wang, G.M. Wu, J. Shen, et al., Scratch-resistant improvement of Sol-Gel derived nano- porous silica films, J. Sol-Gel Sci. Technol. 18(2000) 219-224.

Google Scholar

[10] Z.H. Zhang, Nano porous silica aerogels prepared with ambient pressure drying and the adsorption properties. Ph.D. Thesis (Tongji University, Shanghai, China, 2006) 71.

Google Scholar

[11] S.J. Gregg, K.S. W.Sing Adsorption, Surface Area and Porosity. Acadmic Press, London, New York, 1982, p.2.

Google Scholar