Direct synthesis and spectrum analysis of CeO₂ nanoparticles deposited on carbon nanotubes

Abstract

A novel method of direct synthesis of CeO₂ nanoparticles onto multi-walled carbon nanotubes (MWNTs) was developed with advantages of simplicity, ease of scale-up, and low costs. The size of CeO₂ particles deposited on the MWNTs was less than 6 nm. SEM and TEM were employed to analysis the CeO₂ coated MWNTs, and the properties of FTIR spectrum and UV-vis absorption spectrum were investigated. The functional groups on the MWNTs obtained by nitric acid treatment play an important role on the deposition of the CeO₂ particles. The carbon nanotubes possess broadened UV absorption function after being coated with CeO₂ nanopartilces.

Keywords

nanocomposites / chemical synthesis / spectrum

References

[1] Rinzler A. G., Hafner J. H., Nikolaev P., . Unraveling Nanotubes-field-emission from an Atomic Wire[J]. Science, 1995, 269(5230): 1 550-1 553.

[2] Dillon A. C., Jones K. M., Bekkedahl T. A., . Storage of Hydrogen in Single-walled Carbon Nanotubes[J]. Nature, 1997, 386(6623): 377-379.

[3] Tsang S. C., Chen Y. K., Green M. L. H. A Simple Chemical Method of Opening and Filling Carbon Nanotubes[J]. Nature, 1994, 372(6502): 159-162.

[4] Hu C. G., Wang W. L., Liao K. J., . Systematic Investigation on the Properties of Carbon Nanotube Electrodes with Different Chemical Treatments[J]. J. Phys. Chem. Solids, 2004, 65(10): 1 731-1 736.

[5] Chen G. R., Xu C. L., Mao Z. Q., . Deposition of the Platinum Crystals on the Carbon Nanotubes[J]. Chinese Science Bulletin, 2000, 45(2): 134-137.

[6] Ota K., Kawabata A., Murakami H., . Metal Nanocrystals Grown by Vacuum Deposition on Aligned Carbon Nanotubes[J]. Materials Transactions, 2001, 42(8): 1 684-1 687.

[7] Ajayan P. M., Stephan O., Redlich P., . Carbon Nanotubes as Removable Templates for Metal-oxide Nanocomposites and Nanostructures[J]. Nature, 1995, 375(6532): 564-567.

[8] Landi B. J., Evans C. M., Worman J. J., . Noncovalent Attachment of CdSe Quantum Dots to Single Wall Carbon Nanotubes[J]. Materials Letters, 2006, 60(29–30): 3 502-3 506.

[9] Hu C. G., Zhang Y. Y., Bao G., . DNA Functionalized Single-walled Carbon Nanotubes for Electrochemical Detection[J]. J. Phys. Chem. B, 2005, 109(43): 20 072-20 076.

[10] Mogensen M., Sammes N. M., Tompsett G. A. Physical, Chemical and Electrochemical Properties of Pure and Doped Ceria[J]. Solid State Ion., 2000, 129(1–4): 63-94.

[11] Ozawa M. Role of Cerium-zirconium Mixed Oxides as Catalysts for Car Pollution: a Short Review[J]. Journal of Alloys Compounds, 1998, 277: 886-890.

[12] Feng X. D., Sayle D. C., Wang Z. L. Converting Ceria Polyhedral Nanoparticles into Single-crystal Nanospheres[J]. Science, 2006, 312(5779): 1 504-1 508.

[13] Imanaka N., Masui T., Hirai H., . Amorphous Cerium-titanium Solid Solution Phosphate as a Novel Family of Band Gap Tunable Sunscreen Materials[J]. Chem. Mater., 2003, 15(12): 2 289

[14] Zhou J., Mullins D. R. Adsorption and Reaction of Formaldehyde on Thin-film Cerium Oxide[J]. Surf. Sci., 2006, 600(7): 1 540-1 546.

[15] Li Y. H., Ding J., Chen J. F., . Preparation of Ceria Nanoparticles Supported on Carbon Nanotubes[J]. Mater. Res. Bull., 2002, 37(2): 313-318.

[16] Wei J. Q., Ding J., Zhang X. F., . Coated Double-walled Carbon Nanotubes with Ceria Nanoparticles[J]. Materials Letters, 2005, 59(2–3): 322-325.

[17] Liu H., Hu C. G., Wang Z. L. Composite-hydroxide-mediated Approach for the Synthesis of Nanostructures of Complex Functional-oxides[J]. Nano Lett., 2006, 6(7): 1 535-1 540.

[18] Hu C. G., Liu H., Lao C. S., . Size-manipulable Synthesis of Single-crystalline BaMnO₃ and BaTi_1/2Mn_1/2O₃ Nanorods/Nanowires[J]. Journal of Physical Chemistry B, 2006, 110(29): 14 050-14 054.

[19] Binet C., Daturi M., Lavalley J. C. IR Study of Polycrystalline Ceria Properties in Oxidised and Reduced States[J]. Catalysis Today, 1999, 50(2): 207-225.

[20] Hu C. G., Zhang Z. W., Liu H., . Direct Synthesis and Structure Characterization of Ultrafine CeO₂ Nanoparticles[J]. Nanotechnology, 2006, 17(24): 5 983-5 987.