EFFECT OF ACID CONCENTRATION ON CHARACTERS OF SILICA GEL SYNTHESIZED FROM SODIUM SILICATE

https://doi.org/10.22146/ijc.21834

Nuryono Nuryono(1*), Narsito Narsito(2)

(1) Chemistry Department, Faculty of Mathematics and Natural Sciences Gadjah Mada University, Yogyakarta
(2) Chemistry Department, Faculty of Mathematics and Natural Sciences Gadjah Mada University, Yogyakarta
(*) Corresponding Author

Abstract


In this research, synthesis and characterization of silica gel from sodium silicate through sol-gel process using H2SO4, HCl, and citric acid have been investigated. Synthesis was carried out by mixing and stirring  20 mL of H2SO4, HCl or citric acid  at certain concentration with 50 mL of sodium silicate solution (Na2O 0.17 M and SiO2 0.61 M) for one hour and let to form gel.  The gel was washed with distillated water, and dried in an oven at 100 oC. Characterization of silica gel was carried out by determination of acidity, water adsorption capacity, and water content. Identification of functional group and structure were identified using x-ray diffractometer (XRD) and infrared (IR) spectrophotometer, respectively.  Results showed that at a range of investigated concentration (0.6 - 3.0 M) the increase of concentration, formation of gel with H2SO4 tended to be faster, but with HCl and citric acid to be slower. The increase of acid concentration caused water content, water adsorption capacity, and acidity of the silica gel resulted with HCl and citric acid tended to be increased, increased, and increased, but with H2SO4 to be decreased, increased, and decreased, respectively. Based on the IR spectra and XRD data, it could concluded that the synthetic silica gels contained silanol (Si-OH) and siloxane (Si-O-Si) and were amorphous, showing similar pattern to kieselgel G 60 produced by Merck.


Keywords


silica gel; adsorption capacity; sodium silicate; acidity

Full Text:

Full Text PDF


References

[1]   Oscik, J., 1982, Adsorption, John Wiley & Sons Inc., Chichester.

[2]   C.J. Brinker and Scherer, G.W., 1990, Sol-Gel Science: The Physics and Chemistry of Sol-Gel Processing, Academic Press Inc., New York.

[3]   Nakanishi, K., Minakuchi, H., Soga, N., and Tanaka, N., 1997, J. Sol-Gel Sci. Technol. 8, 547

[4]   Wagh, P.B., Begag, R., Pajonk, G.M., Venkasteswara, A., and Haranath, D., 1999, Mater. Chem. Phys., 57, 214

[5]   Cao, B. and Zhu, C., 1999, J. Non-Cryst. Solids, 246, 34

[6]   Venkateswara, A., and Haranath, D., 1999, Micropor. Mesopor. Mater., 30, 267

[7]   Siouffi, A.M., 2003, Silica Gel-Based Monoliths Prepared by the Sol-GelMethod: Facts and Figures, J. Chromatogr. A., 1000, 801-818

[8]   Pang, J.B., Qiu, K.Y. and Wei, Y., 2001, J. Non-Cryst. Solids, 283, 101-108

[9]   Hukkamaeki, J., and Pakkanen, T.T., 2003, Micropor. Mesopor. Mater., 65, 189-196

[10] Sierra., L., Lopez, B., and Guth, J.L. 2000, Micropor. Mesopor. Mater., 30, 519-527

[11] Mukai, S.R., Nishihara, H. and Tamon, H.  2003, Micropor. Mesopor. Mater., 65, 43-51

[12] Tsyganenko, A.A., Storozheva, E.N., Manoilova, E.N., Lesage, T., Daturi, M., and Lavalley, J.C., 2000, Catal. Letters, 70, 159-163

[13] Silverstein, R.M., Basslerr, G.C., and Morrill, T.C., 1981, Spectrometric Identification of Organic Compounds, 4th edition, John Wiley and Sons, Ney York

[14] Kalapathy, U., Proctor, A., and Shultz, J., 2000, Bioresource Technology, 73, 257-262

[15] Schott, R.P.W., 1993, Silica Gel and Bonded Phases, John Wiley & Sons Ltd., Chichester.



DOI: https://doi.org/10.22146/ijc.21834

Article Metrics

Abstract views : 857 | views : 3987


Copyright (c) 2010 Indonesian Journal of Chemistry

Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

 


Indonesian Journal of Chemistry (ISSN 1411-9420 / 2460-1578) - Chemistry Department, Universitas Gadjah Mada, Indonesia.

Web
Analytics View The Statistics of Indones. J. Chem.