Vol 6, No 7 (2015) > Metalurgy and Material Engineering >

Effect of Citric Acid Addition upon the Precipitation Process on the Nanostructural Characteristics of ZnO Nanoparticles

Imam Akbar, Akhmad Herman Yuwono, Nofrijon Sofyan, Ghiska Ramahdita, Amalia Sholehah

 

Abstract:

Zinc oxide (ZnO) nanoparticles have been investigated in depth, due to their potential as a semiconductor material in dye
sensitized solar cell applications. In
this current research, ZnO nanostructure was synthesized using a simple
precipitation technique with the addition
of citric acid (C6H8O7)as the capping agent. Various ratios of ZnO and
citric acid were prepared, i.e. 1:1,
2:1, 4:1 and calcination temperatures of 150 and 400°C were used to investigate
the effect of those parameters on the ZnO nanostructure and its crystallinity. The nanostructure
characteristics, i.e. nanocrystallite
size, crystallinity, and optical properties were determined by using x-ray diffraction (XRD),
scanning electron microscopy (SEM),
and ultra-violet visible (UV-Vis) spectroscopy, respectively. The investigation results
showed that ZnO nanostructure was formed as spherical shapes and rods in the range of 19.8–30.8 nm with the lowest
band gap energy (Eg) of 3.15
eV obtained under conditions of a 4:1 ratio and calcined at 400°C.
Considering nanostructural characteristics, the ZnO nanostructures in this
study would be suitable for application as a semiconductor oxide layer in a dye
sensitized solar cell.

Keywords: Citric acid; Crystallinity; Dye-sensitized solar cell; Nanostructure, ZnO

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References


Cho, S., Jang, J.W., Jung, S.H., Lee, B.R., Oh, E., Lee, K.H., 2009. Precursor Effects of Citric Acid and Citrates on ZnO Crystal Formation. Langmuir, Volume 25(6), pp. 3825–3831

Cho, S., Jang, J.W., Jung, A., Lee, S.H., Lee, J., Lee, J.S., Lee, K.H., 2011. Formation of Amorphous Zinc Citrate Spheres and their Conversion to Crystalline ZnO Nanostructures. Langmuir, Volume 27(1), pp. 371–378

Fan, Z., Lu, J.G., 2005. Zinc Oxide Nanostructures: Synthesis and Properties. J. Nanosci. Nanotechnol., Volume 10, pp.1561–1573

Gooch, J.W., 2011. Kubelka-Munk Equation. Encyclopedic Dictionary of Polymers, 2nd Edition, pp. 414–415

Ikono, R., Akwalia, P.R., Siswanto, Bambang, W.W., Sukarto, A., Rochman, N.T., 2012. Effect of PH Variation on Particle Size and Purity of Nano Zinc Oxide Synthesized by Sol-Gel Method, Intl. J. Eng. Tech., Volume 12(6), pp. 5–9

Kubelka, P., Munk, F., 1931. Ein Beitrag zur Optik der Farbanstriche. Z. Tech. Phys., Volume 12, pp. 593–601

Mor, G.K., Shankar, K., Paulose, M., Varghese, O.K., Grimes, G.A., 2006. Use of Highly Ordered TiO2 Nanotube Arrays in Dye-sensitized Solar Cells. Nano Letters, Volume 6(2), pp. 215–218

Peng, Q., Qin, Y., 2011. ZnO Nanowires and their Application for Solar Cells, in Nanowires Implementations and Applications, Abbass Hashim (Ed.), ISBN: 978-953-307-318-7, InTech., pp. 157–178

Raoufi, D., 2013. Synthesis and Microstructural Properties of ZnO Nanoparticles Prepared by the Precipitation Method. Renewable Energy, Volume 50, pp.932–937

Suwanboon, S., Amornpitoksuk, P., Bangrak, P., Randorn. C., 2014. Physical and Chemical Properties of Multifunctional ZnO Nanostructures Prepared by Precipitation and Hydrothermal Methods. Ceramics International, Volume 40(1), pp. 975–983

Tauc, J., Grigorovici, R., Vancu, A., 1966. Optical Properties and Electronic Structure of Amorphous Germanium. Phys. Stat. Sol., Volume 15(2), pp. 627–637

Turner, S., Tavernier, S.M.F., Huyberechts, G., Blermans, E., Bals, S., Batenburg, K.J., van Tendeloo, G., 2009. Assisted Spray Pyrolysis Production and Characterization of ZnO Nanoparticles with Narrow Size Distribution. J. Nanoparticle Research, Volume 12(2), pp. 615–622

Xu, J., Fan, K., Shi, W., Li, K., Peng, T., 2013. Application of ZnO Micro-flowers as Scattering Layer for ZnO-based Dye-sensitized Solar Cells with Enhanced Conversion Efficiency. Solar Energy, Volume 101, pp. 150–159

Zhang, H., Yang, D., Li, S., Ma, X., Ji, Y., Xu, J., Que, D., 2005. Controllable Growth of ZnO Nanostructures by Citric Acid Assisted Hydrothermal Process. Mater. Letters, Volume 59, pp. 1696–1700