MSCE  Vol.3 No.6 , June 2015
Development of an Analytical Method for Evaluating the Catalytic Active Sites of Titanium Silicalite Zeolite
ABSTRACT

A simple, quick, sensitive, accurate and precise method has been developed for evaluating the catalytic active sites of titanium silicalite-1 (TS-1). The catalytic active sites of titanium silicalite zeolite depend on the effectively active species (EAS) in TS-1 which react with specific substrates quickly. However, the EAS was hard to be evaluated with conventional instruments and techniques in the past. In this paper, the EAS was formed in TS-1 upon interaction with H2O2, and its presence could be confirmed by UV-vis spectroscopy which has an absorption peak at 385 nm. The absorbance at 385 nm was found to be linearly related to time, and when the absorbance and the increasing rate of absorbance (k) increased, the catalytic performance of TS-1 enhanced.


Cite this paper
Huang, X. , Xue, Y. , Gao, X. , Li, B. , Wen, Y. , Wang, X. (2015) Development of an Analytical Method for Evaluating the Catalytic Active Sites of Titanium Silicalite Zeolite. Journal of Materials Science and Chemical Engineering, 3, 1-6. doi: 10.4236/msce.2015.36001.
References
[1]   Taramasso, M. and Donato, S. (1983) Preparation of Porous Crystalline Synthetic Material Comprised of Silicon and Titanium Oxidest. US Patent No. 4410501.

[2]   Xin, H., Zhao, J. and Xu, S. (2010) Enhanced Catalytic Oxidation by Hierarchically Structured TS-1 Zeolite. The Journal of Physical Chemistry C, 114, 6553-6559. http://dx.doi.org/10.1021/jp912112h

[3]   Zou, Y., Song, W. and Dai, C. (2013) Modification of Small-Crystal Titanium Silicalite-1 with Organic Base: Recrystallization and Catalytic Properties in the Hydroxylation of Phenol. Applied Catalysis A: General, 453, 272-279. http://dx.doi.org/10.1016/j.apcata.2012.12.027

[4]   Wang, Y., Lin, M. and Tuel, A. (2007) Hollow TS-1 Crystal Formed Via a Dissolution-Recrystallization Process. Microporous and Mesoporous Materials, 102, 80-85. http://dx.doi.org/10.1016/j.micromeso.2006.12.019

[5]   Ke, X., Li, X. and Chang, Z. (2007) Synthesis of Mesoporous TS-1 by Hydrothermal and Steam-Assisted Dry Gel Conversion Techniques with the Aid of Triethanolamine. Microporous and Mesoporous Materials, 106, 75-78. http://dx.doi.org/10.1016/j.micromeso.2007.02.034

[6]   Zhu, Y., Hua, Z. and Zhou, X. (2013) CTBA-Templated Me-soporous TS-1 Zeolite as Active Catalytic in a Desulfrization Process: The Decreased Hydrophobicity Is More Favourable in Thiophene Oxidation. The Royal Society of Chemistry, 3, 4193-4198.

[7]   Chen, L., Wang, Y. and He, M. (2011) Hydrothermal Synthesis of Hierarchical Titanium Silicalite-1 Using Single Template. Materials Research Bulletin, 46, 698-701. http://dx.doi.org/10.1016/j.materresbull.2011.01.015

[8]   Huang, J., Liu, C. and Sun, D.H. (2014) Biosynthesized Gold Nanoparticles Supported over TS-1 toward Efficient Catalyst for Epoxidation of Styrene. Chemical Engineering Journal, 235, 215-223. http://dx.doi.org/10.1016/j.cej.2013.09.035

[9]   Shia, C.F., Zhua, B. and Lina, M. (2011) Cyclohexane Mild Oxidation Catalyzed by New Titanosilicate with Hollow Structure. Catalysis Today, 175, 398-403. http://dx.doi.org/10.1016/j.cattod.2011.05.012

[10]   Xiang, F.G., Duana, X.Z. and Qiana, G. (2014) Au Nanoparticles Deposited on the External Surfaces of TS-1: Enhanced Stability and Activity for Direct Propylene Epoxidation with H2 and O2. Applied Catalysis B: Environmental, 151, 396-401.

[11]   Li, G., Wang, X. S. and Yan, H. S. (2001) Effect of Sodium Ions on Propylene Epoxidation Catalyzed by Titanium Silicalite. Applied Catalysis A: General, 218, 31-38. http://dx.doi.org/10.1016/S0926-860X(01)00607-X

[12]   Yao, P.X., Wang, Y.Q. and Zhang, T. (2014) Effect of So-dium Ions in Synthesis of Titanium Silicalite-1 on Its Catalytic Performance for Cyclohexanone Ammoximation. Chem. Sci. Eng, 8, 149-155.

[13]   Wu, X.X., Wang, Y.Q. and Zhang, T. (2014) Effect of TS-1 Treatment by Tetrapropyl Ammonium Hydroxide on Cyclohexanone Ammoximation. Catalysis Communications, 50, 59-62. http://dx.doi.org/10.1016/j.catcom.2014.03.003

[14]   Sirijaraensreab, J. and Limtrakul, J. (2013) Mechanisms of the Ammonia Oxidation by Hydrogen Peroxide over the Perfect and Defective Ti species of TS-1 Zeolite. Physical Chemistry Chemical Physics, 15, 18093. http://dx.doi.org/10.1039/c3cp52682h

[15]   Shetti, V.N., Srinivas, D. and Ratnasamy, P. (2004) Enhancement of Che-moselectivity in Epoxidation Reactions over TS-1 Catalysts by Alkali and Alkaline Metal Ions Ti-Peroxo Species in the TS-1/H2O2/H2O System. Journal of Molecular Catalysis A: Chemical, 210, 171-178. http://dx.doi.org/10.1016/j.molcata.2003.09.014

[16]   Bonino, F., Damin, A. and Ricchiardi, G. (2004) Tiperoxo Species in the TS-1/H2O2/H2O System. Journal of Physical Chemistry B, 108, 3573-3583. http://dx.doi.org/10.1021/jp036166e

[17]   Thangaraj, A., Eapen, M. J., Sivasanker, S. and Ratnasamy, P. (1992) Studies on the Synhtesis of Titanium Silicalite, TS-1. Zeolites, 12, 943-050. http://dx.doi.org/10.1016/0144-2449(92)90159-M

 
 
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