Hydrothermal Synthesis of Cuprous Oxide Nanoflowers and Characterization of Their Optical Properties

Year 2018, Volume: 22 Issue: 2, 397 - 401, 15.08.2018

Aziz Genç

https://doi.org/10.19113/sdufbed.58150

Cited By: 2

Abstract

In this study, the facile, one-step synthesis of cuprous oxide nanostructures via hydrothermal reaction is reported. Nanoflower-like cuprous oxides with average sizes of ~230 nm are synthesized by using copper (Cu) acetate monohydrate as the Cu source, glucose as the reducing agent and polyvinylpyrrolidone (PVP) as the surfactant in basic aqueous solutions at 140^oC for 6 h. The effects of the NaOH content on the morphology of synthesized structures are also investigated, where hexapods were synthesized when no NaOH used and submicron sized octahedra were obtained with increased NaOH amount. The optical properties of the synthesized structures are studied by using photoluminescence (PL) and UV-Vis spectroscopy. PL spectra revealed the presence of different band edge emissions located at similar wavelengths for all the three samples, where the intensity of the emissions varied from sample to sample. An absorbance peak located at ~355 nm and a direct bandgap value of about Eg = 2.16 eV are measured via UV-Vis spectroscopy of the nanoflower-like cuprous oxides. 

Keywords

Cuprous oxide, Hydrothermal synthesis; Microstructure; Optical properties

References

• [1] Kuo, C.H., Huang, M.H. 2010. Morphologically controlled synthesis of Cu2O nanocrystals and their properties. Nano Today, 5 (2010), 106-116.
• [2] Sun, S., Yang, Z. 2014. Recent advances in tuning crystal facets of polyhedral cuprous oxide architectures. RSC Advances, 4 (2014), 3804-3822.
• [3] Zhang, L. Wang, H. 2011. Cuprous oxide Nanoshells with Geometrically Tunable Optical Properties. ACS Nano, 5 (2011), 3257-3267.
• [4] Karapetyan, A., Reymers, A., Giorgio, S., Fauquet, C., Sajti, L., Nitsche, S., Nersesyan, M., Gevorgyan, V., Marine, W. 2015. Cuprous oxide thin films prepared by thermal oxidation of copper layer. Morphological and optical properties. Journal of Luminescence, 159 (2015), 325-332.
• [5] Wei, H.M., Gong, H.B., Chen, L., Zi, M., Cao, B.Q. 2012. Photovoltaic Efficiency Enhancement of Cu2O Solar Cells Achieved by Controlling Homojunction Orientation and Surface Microstructure, Journal of Physical Chemistry, 116 (2012), 10510-10515.
• [6] Li, S., Ge, X., Jiang, S., Peng, X., Zhang, Z., Li, W., Yu, S. 2015. Synthesis of octahedral and cubic Cu2O microcrystals in sub- and super-critical methanol and their photocatalytic performance. Journal of Materials Science, 50 (2015), 4115-4121.
• [7] Li, R., Yan, X., Yu, L., Zhang, Z., Tang, Q., Pan, Y. 2013. The morphology dependence of cuprous oxide and its photocatalytic properties. CrystEngComm, 15 (2013), 10049-10058.
• [8] Han, K., Tao, M. 2009. Electrochemically deposited p-n homojunction cuprous oxide solar cells. Solar Energy Materials & Solar Cells, 93 (2009), 153-157.
• [9] Zhang, H., Zhu, Q,. Zhang, Y., Wang, Y., Zhao, L., Yu, B. 2007. One-Pot Synthesis and Hierarchical Assembly of Hollow Cu2O Microspheres with Nanocrystals-Composed Multishell and Their Gas-Sensing Properties. Advanced Functional Materials, 17 (2007), 2766-2771.
• [10] Zhang, J., Liu, J., Peng, Q., Wang, X., Li, Y. 2006. Nearly Monodisperse Cu2O and CuO Nanospheres: Preparation and Applications for Sensitive Gas Sensors. Chemistry of Materials, 18 (2006), 867-871.
• [11] Pang, H., Gao, F., Lu, Q. 2009. Morphology effect on antibacterial activity of cuprous oxide. Chemical Communications, (2009), 1076-1078.
• [12] Poizot, P., Laruelle, S., Grugeon, S., Dupont, L., Tarascon, J.M. 2000. Nano-sized transition-metal oxides as negative-electrode materials for lithium-ion batteries. Nature, 407 (2000), 496-499.
• [13] Gou, L., Murphy, C.J. 2004. Controlling the size of Cu2O nanocubes from 200 to 25 nm. Journal of Materials Chemistry, 14 (2004), 735-738.
• [14] Ko, E., Choi, J., Okamoto, K., Tak, Y., Lee, J. 2006. Cu2O Nanowires in an Alumina Template: Electrochemical Conditions for the Synthesis and Photoluminescence Characteristics. Chemical Physics Physical Chemistry, 7 (2006), 1505-1509.
• [15] Nguyen, M.A., Bedford, N.M., Ren, Y., Zahran, E.M., Goodin, R.C., Chagani, F.F., Bachas, L.G., Knecht, M.R. 2015. Direct Synthetic Control over the Size, Composition, and Photocatalytic Activity of Octahedral Copper Oxide Materials: Correlation Between Surface Structure and Catalytic Functionality. ACS Applied Materials Interfaces, 7 (2015), 13238-13250.
• [16] Ghosh, S., Das, R., Naskar, M.K. 2016. Morphological evolution of hexapod Cu2O microcrystals by a rapid template-free autoclaving technique. Materials Letters, 183 (2016), 325-328.
• [17] Zhang, L., Yuan, F., Zhang, X., Yang, L. 2011. Facile synthesis of flower like copper oxide and their application to hydrogen peroxide and nitrite sensing. Chemistry Central Journal, 5 (2011), 75.
• [18] Einarsrud, M.A., Grande, T. 2014. 1D oxide nanostructures from chemical solutions. Chemical Society Reviews, 43 (2014), 2187-2199.
• [19] Zhang, X., Xie, Y., Xu, F., Xu, D., Liu, H. 2004. Growth and morphological evolution of hexapod-shaped cuprous oxide microcrystals at room temperature, Canadian Journal of Chemistry, 82 (2004), 1341-1345.
• [20] Das, K., De, S.K. 2009. Optical and photoconductivity studies of Cu2O nanowires synthesized by solvothermal method. Journal of Luminescence, 129 (2009), 1015-1022.
• [21] Wei, H., Gong, H., Wang, Y., Hu, X., Chen, L., Xu, H., Liu, P., Cao, B. 2011. Three kinds of Cu2O/ZnO heterostructure solar cells fabricated with electrochemical deposition and their structure-related photovoltaic properties. Cryst. Eng. Comm., 13 (2011), 6065-6070.
• [22] No, Y.S., Oh, D.H., Kim, S.Y., Yoo, K.H., Kim, T.W. 2012. Structural, optical, and electrical properties of Cu2O nanocubes grown on indium-tin-oxide-coated glass substrates by using seed-layer-free electrochemical deposition method. Applied Surface Science, 258 (2012), 7581-7583.
• [23] Tauc, J., Grigorovici, R., Vancu, A. 1966. Optical Properties and Electronic Structure of Amorphous Germanium. Physica Status Solidi, 15 (1966), 628-637.