Adsorption of formaldehyde vapor by amine-functionalized mesoporous silica materials.

The amine-functionalized mesoporous silica materials were prepared via the co-condensation reaction of tetraethoxysilane and three types of organoalkoxysilanes: 3-aminopropyl-trimethoxysilane, n-(2-aminoethyl)-3-aminopropyltrimethoxysilane, and 3-(2-(2-aminoehtylamino)ethylamino) propyl-trimethoxysilane. Cetyltrimethylammonium bromide was used as a template for forming pores. Specific surface area and pore volume of the amine-functionalized mesoporous silica materials were determined using surface area and pore size analyzer. Fourier transform infrared (FTIR) spectroscope was employed for identifying the functional groups on pore surface. In addition, the amine-functionalized mesoporous silica materials were applied as adsorbents for adsorbing formaldehyde vapor. FTIR spectra showed the evidence of the reaction between formaldehyde molecules and amine groups on pore surface of adsorbents. The equilibrium data of formaldehyde adsorbed on the adsorbents were analyzed using the Langmuir, Freundlich and Temkin isotherm. The sample functionalized from n-(2-aminoethyl)-3-aminopropyltrimethoxysilane showed the highest adsorption capacity owing to its amine groups and the large pore diameter.

[1]  S. Haam,et al.  Organic dye adsorption on mesoporous hybrid gels , 2004 .

[2]  Xiu‐Ping Yan,et al.  An imprinted organic--inorganic hybrid sorbent for selective separation of cadmium from aqueous solution. , 2004, Analytical chemistry.

[3]  K. Kaneko Adsorption of Gases , 1994 .

[4]  K. László Characterization and adsorption properties of polymer-based microporous carbons with different surface chemistry , 2005 .

[5]  Alireza Abbaspur,et al.  Equilibrium isotherm studies for the sorption of benzene, toluene, and phenol onto organo-zeolites and as-synthesized MCM-41 , 2004 .

[6]  K. Sing Reporting physisorption data for gas/solid systems with special reference to the determination of surface area and porosity (Recommendations 1984) , 1985 .

[7]  Bengt Danielsson,et al.  Sol–gel based thermal biosensor for glucose , 2001 .

[8]  Shaojun Dong,et al.  Electrogenerated chemiluminescence biosensor with alcohol dehydrogenase and tris(2,2'-bipyridyl)ruthenium (II) immobilized in sol-gel hybrid material. , 2005, Biosensors & bioelectronics.

[9]  E. Barrett,et al.  The Determination of Pore Volume and Area Distributions in Porous Substances. II. Comparison between Nitrogen Isotherm and Mercury Porosimeter Methods , 1951 .

[10]  J. A. Wang,et al.  Effects of structural defects and acid–basic properties on the activity and selectivity of isopropanol decomposition on nanocrystallite sol–gel alumina catalyst , 1999 .

[11]  E. Rideal Adsorption of Gases , 1932, Nature.

[12]  Galen D. Stucky,et al.  MESOPOROUS SILICATE SEQUESTRATION AND RELEASE OF PROTEINS , 1999 .

[13]  D. B. Jackson,et al.  Organomodified hexagonal mesoporous silicates , 1999 .

[14]  E. Barrett,et al.  (CONTRIBUTION FROM THE MULTIPLE FELLOWSHIP OF BAUGH AND SONS COMPANY, MELLOX INSTITUTE) The Determination of Pore Volume and Area Distributions in Porous Substances. I. Computations from Nitrogen Isotherms , 1951 .

[15]  J. B. Higgins,et al.  A new family of mesoporous molecular sieves prepared with liquid crystal templates , 1992 .

[16]  G. Socrates,et al.  Infrared and Raman characteristic group frequencies : tables and charts , 2001 .

[17]  I. Langmuir THE ADSORPTION OF GASES ON PLANE SURFACES OF GLASS, MICA AND PLATINUM. , 1918 .

[18]  H. Freundlich Über die Adsorption in Lösungen , 1907 .

[19]  D. Zhao,et al.  A new class of hybrid mesoporous materials with functionalized organic monolayers for selective adsorption of heavy metal ions , 2000 .

[20]  F. Tompkins Physical adsorption on non-uniform surfaces , 1950 .

[21]  I. Bakunina,et al.  A new precursor for the immobilization of enzymes inside sol-gel-derived hybrid silica nanocomposites containing polysaccharides. , 2004, Journal of biochemical and biophysical methods.

[22]  Luyan Zhang,et al.  Immobilization of enzymes in mesoporous materials: controlling the entrance to nanospace , 2004 .

[23]  Z. Xue,et al.  Functionalized sol–gels for mercury(II) separation: a comparison of mesoporous materials prepared with and without surfactant templates , 2004 .

[24]  Brent H. Shanks,et al.  Design of multifunctionalized mesoporous silicas for esterification of fatty acid , 2005 .

[25]  X. Zhao,et al.  Functionalized nanoporous silicas for the immobilization of penicillin acylase , 2004 .

[26]  M. P. Domínguez,et al.  Hydrolysis catalyst effect on sol-gel silica structure , 1998 .

[27]  H. Boudriot,et al.  Über die Adsorption von n-Alkylammoniumionen an Silberhalogeniden in wäßrigen Lösungen , 1970 .

[28]  E. Teller,et al.  ADSORPTION OF GASES IN MULTIMOLECULAR LAYERS , 1938 .

[29]  Jiyong Park,et al.  Preparation and characterization of organo-modified SBA-15 by using polypropylene glycol as a swelling agent , 2003 .

[30]  E. Maginn,et al.  Heavy Metal Remediation Using Functionalized Mesoporous Silicas with Controlled Macrostructure , 2001 .

[31]  G. Lu,et al.  Characterization of the structural and surface properties of chemically modified MCM-41 material , 2000 .

[32]  W. Tanthapanichakoon,et al.  Preparation of activated carbons from coffee residue for the adsorption of formaldehyde , 2005 .

[33]  Jing-tang Zheng,et al.  Influence of heat treatment of rayon-based activated carbon fibers on the adsorption of formaldehyde. , 2003, Journal of colloid and interface science.

[34]  Baohong Liu,et al.  Amperometric biosensor based on a nanoporous ZrO2 matrix , 2003 .

[35]  Zhongmin Liu,et al.  Preparation of ordered carbon/silica hybrid mesoporous materials with specific pore size expansion , 2005 .

[36]  J. S. Beck,et al.  Ordered mesoporous molecular sieves synthesized by a liquid-crystal template mechanism , 1992, Nature.