Synthesis of Porous MgO into Sheet-Like Structure via Solution Routes

Abstract:

A simple solution route employing the reaction of magnesium acetate tetrahydrate ((CH₃COO)₂Mg.4H₂O) and hexamethylenetetramine (C₆H₁₂N₄) has been demonstrated to successfully grown MgO thin film on both Mg and MgO substrates at two different temperature i.e 90 °C and 150 °C for 4 h. Morphological observations revealed that the porous structure of MgO film was obtained on Mg substrate while sheet-like structure film was observed when using MgO substrate. EDX indicated only Mg and O were present in all films. The MgO bandgap obtained varies with type of substrate used and temperature. The MgO film growth on Mg substrate bandgap increased from 5.18 eV to 5.27 eV with temperature increased from 90 °C to 150 °C. Similar increased was also observed with MgO film growth on MgO substrate. However the results obtained are well below of MgO bulk energy bandgap. This was probably due to non-stoichiometry of deposited layers and crystallinity of the samples as shown by EDX and XRD results respectively.

• Periodical: Materials Science Forum (Volume 694)
• Pages: 625-629
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.694.625
• Online since: July 2011
• Authors: Maria Abu Bakar, Muhammad Azmi Abdul Hamid, Azman Jalar, Roslinda Shamsudin
• Keywords: Aqueous Chemical Growth, MgO, Optical Property, Porous-Like, Sheet-Like

References

[1] N. Yasui, H. Nomuraa, A.I. Ektessabi, Characteristics of ion beam modified magnesium oxide films, Thin Solid Films 447 –448 (2004) 377–382.

DOI: 10.1016/s0040-6090(03)01087-3

[2] Z. Yuna, Z. Guocai, Synthesis of MgO microspheres with nanosheets in a mechanical force reactor and its optical property, Mater. Sci. Eng. B 142 (2007) 93–97.

DOI: 10.1016/j.mseb.2007.07.001

[3] L. Sun, H. He, C. Liu, Z. Ye, Local super-saturation dependent synthesis of MgO nanosheets, Appl. Surf. Sci. 257 (2011) 3607–3611.

DOI: 10.1016/j.apsusc.2010.11.087

[4] L. Qin, J. Zhao, X. Zou, Synthesis and morphology evolution of tubular tetrapod MgO by thermal evaporation, Mater. Chem. Phys. 113 (2009) 468–473.

DOI: 10.1016/j.matchemphys.2008.07.115

[5] J.-H. Boo, S.-B.Lee, K.-S. Yu, W. Koh, Y. Kim, Growth of magnesium oxide thin films using single molecular precursors by metal-organic chemical vapor deposition, Thin Solid Films 341 (1999) 63-67.

DOI: 10.1016/s0040-6090(98)01524-7

[6] L. Vayssieres, Growth of arrayed nanorods and nanowires of ZnO from aqueous solutions, Adv. Mater. 15 (2005) 464-466.

DOI: 10.1002/adma.200390108

[7] T. Jintakosol, P. Singjai, Effect of annealing treatment on luminescence property of MgO nanowires, Curr. Appl. Phys. 9 (2009) 1288–1292.

DOI: 10.1016/j.cap.2009.02.014

[8] Y. He, J. Wang, H. Deng, Q. Yin, J. Gong, Comparison of different methods to prepare MgO whiskers, Ceram. Int. l 34 (2008) 1399–1403.

DOI: 10.1016/j.ceramint.2007.03.034

[9] M.A. Shah, A. Qurashi, Novel surfactant-free synthesis of MgO nanoflakes, J. Alloys Compd. 482 (2009) 548–551.

DOI: 10.1016/j.jallcom.2009.04.129

[10] P. Chrysicopoulou, D. Davazoglou, Chr. Trapalis, G. Kordas, Optical properties of very thin (>100 nm) sol–gel TiO films, Thin Solid Films 323 (1998) 188–193.

DOI: 10.1016/s0040-6090(97)01018-3

[11] S.H. Tamboli, R.B. Patil, S.V. Kamat, V. Puri, R.K. Puri, Modification of optical properties of MgO thin films by vapour chopping, J. Alloys Compd. 477 (2009) 855–859.

DOI: 10.1016/j.jallcom.2008.11.011

[12] A.M.E. Raj, L.C. Nehru, M. Jayachandran, C. Sanjeeviraja. Spray pyrolysis deposition and characterization of highly (100) oriented magnesium oxide thin films. Cryst. Res. Technol. 42 (2007) 867.

DOI: 10.1002/crat.200710918

[13] L. Kumari, W.Z. Li, C.H. Vannoy, R.M. Leblanc, D.Z. Wang. Synthesis, characterization and optical properties of Mg(OH)2 micro-/nanostructure and its conversion to MgO. Ceram. Int. 35 (2009) 3355–3364.

DOI: 10.1016/j.ceramint.2009.05.035