The Malaysian Journal of Analytical Sciences Vol 16 No 3 (2012): 220 – 227

 

 

 

SYNTHESIS AND CHARACTERIZATION OF Ti-PHENYL@SiO₂

CORE-SHELL NANOPARTICLES CATALYST

 

(Penyediaan dan Pencirian Pemangkin Ti-Phenyl@SiO₂ Teras-Cangkerang Nanopartikel)

 

Syamsi Aini^1,2,  Jon Efendi^1,2, Hendrik Oktendy Lintang¹, Hadi Nur¹*

 

¹Ibnu Sina Institute for Fundamental Science Studies,

Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor, Malaysia

²Department of Chemistry, Faculty of Mathematics and Natural Sciences,

Universitas Negeri Padang, Jln. Prof. Dr. Hamka, Air Tawar, Padang 25131, West Sumatera, Indonesia

 

*Corresponding author: hadi@kimia.fs.utm.my

 

 

Abstract

This study highlights the potential use of Ti-Phenyl@SiO₂ core-shell nanoparticles as heterogeneous catalysis in oxidation reaction. The Ti-Phenyl@SiO₂ was synthesized by reduction of TiCl₄ and diazonium salt with sodiumborohydride to produce phenyl titanium nanoparticles (Ti-Phenyl), followed by the silica shell coating using tetraethyl orthosilicate (TEOS). The Ti-Phenyl@SiO₂ nanoparticles were characterized by Fourier transform infrared (FTIR) spectrometer, diffuse reflectance (DR) UV-visible spectrometer, thermogravimetric analyzer (TGA), X-ray diffraction (XRD) spectrometer, field emission scanning electron microscope (FESEM) and transmission electron microscope (TEM). The core-shell size of Ti-Phenyl@SiO₂ was in the range of 40 to 100 nm with its core composed with an agglomeration of Ti-Phenyl. The Ti-Phenyl@SiO₂ was active as a catalyst in the liquid phase epoxidation of 1-octene with aqueous hydrogen peroxide as an oxidant.

 

Keywords: Ti-Phenyl@SiO₂, core-shell, nanoparticles, epoxidation, aqueous hydrogen peroxide

 

References

1.       Tatsumi, T. (2000). Importance of hydrophobicity in the liquid phase oxidation catalyzed by titanosilicates. Research on Chemical Intermediates, 26(1), 7-12.

2.       Nur, H. Manan, A.F.N.A., Wei, L.K., Muhid, M.N.M., Hamdan, H. (2005). Simultaneous adsorption of a mixture of paraquat and dye by NaY zeolite covered with alkylsilane. Journal of Hazardous Materials, 117, 35-40.

3.       Nur, H., Hau, N.Y.,  Misnon, I.I., Hamdan, H., Muhid, M.N.M. Hydrophobic fluorinated TiO₂-ZrO₂ as catalyst in epoxidation of 1-octene with aqueous hydrogen peroxide. Materials Letters, 60, 2274-2277.

4.       Corma, A. Domine, M. Gaona, J.A. Jorda, J.L. Navarro, M.T. Rey, F. Pariente, J.P. Tsuji, J. McCulloch, B., Nemeth, L.T. (1998). Strategies to improve the epoxidation activity and selectivity of Ti-MCM-41. Chemical Communications. 2211-2212.

5.       Ghosh, D., Chen, S. (2008). Palladium nanoparticles passivated by metal-carbon covalent linkages. Journal of Materials Chemistry, 18(7), 755-762.

6.       Ghosh, D., Pradhan, S., Chen, W., Chen, S. (2008). Titanium nanoparticles stabilized by Ti−C covalent bonds. Chemistry of Materials, 20(4), 1248-1250.

7.       Chen, W., Chen, S., Ding, F., Wang, H., Brown, L. E., Konopelski, J. P. (2008). Nanoparticle - mediated intervalence transfer. Journal of the American Chemical Society, 130(36), 12156-12162.

8.       Chou, K.-S., Chen, C.-C. (2007). Fabrication and characterization of silver core and porous silica shell nanocomposite particles. Microporous and Mesoporous Materials, 98(1-3), 208-213.

9.       Arends, I.W.C.E., Sheldon, R.A. (2001). Activities and stabilities of heterogeneous catalysts in selective liquid phase oxidations: recent developments. Applied Catalysis A: General, 212(1-2), 175-187.

10.    Corma, A., García, H. (2002). Lewis acids as catalysts in oxidation reactions: from homogeneous to heterogeneous systems. Chemical Reviews, 102(10), 3837-3892.

11.    Ayi, A., Khare, V., Strauch, P., Girard, J., Fromm, K., Taubert, A. (2010). On the chemical synthesis of titanium nanoparticles from ionic liquids. Monatshefte für Chemie / Chemical Monthly, 141(12), 1273-1278.

12.    Halalay, I.C., Balogh, M.P. (2008). Sonochemical method for producing titanium metal powder. Ultrasonics Sonochemistry, 15(5), 684-688.

13.    Dhara, S., Giri, P.K. (2012). Ti nanoparticles decorated ZnO nanowires heterostructure: photocurrent and photoluminescence properties. Journal of Experimental Nanoscience, 1-9.

14.    Uchida, M., Oyane, A. Kim, H.M., Kokubo, T., Ito, A. (2004). Biomimetic coating of laminin-apatite composite on titanium metal and its excellent cell-adhesive properties. Advanced Materials, 16(13), 1071-1074.