Synthesis, characterization and degradation activity of Methyl orange Azo dye using synthesized CuO/α-Fe2O3 nanocomposite

Document Type : Research Paper


1 Faculty of Chemical, Petroleum and Gas Engineering, Semnan University, Semnan, Iran

2 Faculty of Nanotechnology, Semnan University, Semnan, Iran


This study investigated the photo-degradation of methyl orange (MO) as a type of azo dye using a CuO/α-Fe2O3 nanocomposite. A CuO/α-Fe2O3 powder with a crystalline size in the range of 27-49 nm was successfully prepared using simple co-precipitation along with a sonication method. The characterization of the synthesized sample was done via XRD, FE-SEM, EDS, FTIR and DRS analyses. The Tauc equation revealed that the band gap of the nano composite in the direct mood was 2.05 ev, which is in the visible light range. The effect of operating factors containing dye concentration, photocatalyst dosage and pH on dye degradation efficiency was measured. Response Surface Method (RSM) was employed to specify the parameter effects. The photocatalytic activity of the CuO/α-Fe2O3 nanocomposite was evaluated by degradation of MO under visible light irradiation. The results showed that the pH value played a very effective role in the dye degradation process efficiency. Also, the photocatalytic degradation of MO obtained was equal to 88.47% in the optimal values. 


Main Subjects

[1] de la Plata, G. B. O., Alfano, O. M., Cassano, A. E. (2010). Decomposition of 2-chlorophenol employing goethite as Fenton catalyst. I. Proposal of a feasible, combined reaction scheme of heterogeneous and homogeneous reactions. Applied catalysis B: Environmental, 95(1), 1-13.
[2] Davis, R. J., Gainer, J. L., O'Neal, G., Wu, I. W. (1994). Photocatalytic decolorization of wastewater dyes. Water environment research, 66(1), 50-53.
[3] Matthews, R. W. (1991). Photooxidative degradation of coloured organics in water using supported catalysts. TiO2 on sand. Water research, 25(10), 1169-1176.
[4] Oyama, T., Otsu, T., Hidano, Y., Tsukamoto, T., Serpone, N., Hidaka, H. (2014). Remediation of aquatic environments contaminated with hydrophilic and lipophilic pharmaceuticals by TiO2-photoassisted ozonation. Journal of environmental Chemical engineering, 2(1), 84-89.
[5] Barroso, M., Cowan, A. J., Pendlebury, S. R., Grätzel, M., Klug, D. R., Durrant, J. R. (2011). The role of cobalt phosphate in enhancing the photocatalytic activity of α-Fe2O3 toward water oxidation. Journal of the American chemical society, 133(38), 14868-14871.
[6] Zhou, L., Wang, W., Xu, H., Sun, S., Shang, M. (2009). Bi2O3 hierarchical nanostructures: controllable synthesis, growth mechanism, and their application in photocatalysis. Chemistry–A European journal, 15(7), 1776-1782.
[7] Ke, D., Liu, S., Dai, K., Zhou, J., Zhang, L., Peng, T. (2009). CdS/regenerated cellulose nanocomposite films for highly efficient photocatalytic H2 production under visible light irradiation. The journal of physical chemistry C, 113(36), 16021-16026.
[8] Liu, X. M., Yang, G., Fu, S. Y. (2007). Mass synthesis of nanocrystalline spinel ferrites by a polymer-pyrolysis route. Materials science and engineering: C, 27(4), 750-755.
[9] Todorova, S., Cao, J. L., Paneva, D., Tenchev, K., Mitov, I., Kadinov, G. Idakiev, V. (2010). Mesoporous CuO-Fe 2 O 3 composite catalysts for complete n-hexane oxidation. Studies in surface science and catalysis, 175, 547-550.
[10] Jayaprakash, R., Seehra, M. S., Prakash, T., Kumar, S. (2013). Effect of α-Fe2O3 phase on structural, magnetic and dielectric properties of Mn–Zn ferrite nanoparticles. Journal of physics and chemistry of solids, 74(7), 943-949.
[11] Mallick, P., Dash, B. N. (2013). X-ray diffraction and UV-visible characterizations of α-Fe2O3 nanoparticles annealed at different temperature. Nanoscience and nanotechnology, 3(5), 130-134.
[12] Morales, J., Sánchez, L., Martin, F., Ramos-Barrado, J. R., Sánchez, M. (2004). Nanostructured CuO thin film electrodes prepared by spray pyrolysis: a simple method for enhancing the electrochemical performance of CuO in lithium cells. Electrochimica acta, 49(26), 4589-4597.
[13] Lin, J., Lin, Y., Liu, P., Meziani, M. J., Allard, L. F., Sun, Y. P. (2002). Hot-fluid annealing for crystalline titanium dioxide nanoparticles in stable suspension. Journal of the American chemical society, 124(38), 11514-11518.
[14] Morales, A. E., Mora, E. S., Pal, U. (2007). Use of diffuse reflectance spectroscopy for optical characterization of un-supported nanostructures. Revista Mexicana de Fisica S, 53(5), 18.
[15] Tumuluri, A., Naidu, K. L., Raju, K. J. (2014). Band gap determination using Tauc’s plot for LiNbO3 thin films. Chemical technology, 6(6), 3353-3356.
[16] Torrent, J., Barrón, V. (2002). Diffuse reflectance spectroscopy of iron oxides. Encyclopedia of surface and colloid science, 1, 1438-1446.
[17] Mallick, P. (2014). Influence of different materials on the microstructure and optical band gap of α-Fe2O3 nanoparticles. Materials science-Poland, 32(2), 193-197.
[18] Mallick, P., Dash, B. N. (2013). X-ray diffraction and UV-visible characterizations of α-Fe2O3 nanoparticles annealed at different temperature. Nanoscience and nanotechnology, 3(5), 130-134.
[19] Al-Kuhaili, M. F., Saleem, M., Durrani, S. M. A. (2012). Optical properties of iron oxide (α-Fe2O3) thin films deposited by the reactive evaporation of iron. Journal of alloys and compounds, 521, 178-182.
[20] Shahmiri, M., Ibrahim, N. A., Zainuddin, N., Asim, N., Bakhtyar, B., Zaharim, A., Sopian, K. (2013). Effect of pH on the synthesis of CuO nanosheets by quick precipitation method. WSEAS transactions on environment and development, 9(2), 137-145.
[21] Kannaki, K., Ramesh, P. S., Geetha, D. (2012). Hydrothermal synthesis of CuO nanostructure and their characterizations. International journal of scientific and engineering research 3(9), 1-4.
[22] Darezereshki, E., Bakhtiari, F. (2013). Synthesis and characterization of tenorite (CuO) nanoparticles from smelting furnace dust (SFD). Journal of mining and metallurgy, section B: Metallurgy, 49(1), 21-26.
[23] Basavaraja, S., Balaji, D. S., Bedre, M. D., Raghunandan, D., Swamy, P. P., Venkataraman, A. (2011). Solvothermal synthesis and characterization of acicular α-Fe2O3 nanoparticles. Bulletin of materials science, 34(7), 1313-1317.
[24] Cho, I. H., Zoh, K. D. (2007). Photocatalytic degradation of azo dye (Reactive Red 120) in TiO2/UV system: optimization and modeling using a response surface methodology (RSM) based on the central composite design. Dyes and pigments, 75(3), 533-543.
[25] Eskandarloo, H., Badiei, A., Haug, C. (2014). Enhanced photocatalytic degradation of an azo textile dye by using TiO2/NiO coupled nanoparticles: Optimization of synthesis and operational key factors. Materials science in semiconductor processing, 27, 240-253.
[26] Satheesh, R., Vignesh, K., Suganthi, A., Rajarajan, M. (2014). Visible light responsive photocatalytic applications of transition metal (M= Cu, Ni and Co) doped α-Fe2O3 nanoparticles. Journal of environmental chemical engineering, 2(4), 1956-1968.
[27] Kaur, B., Kumar, B., Garg, N., Kaur, N. (2015). Statistical optimization of conditions for decolorization of synthetic dyes by Cordyceps militaris MTCC 3936 using RSM. Biomed research international, 2015, 1-17.
[28] Wang, L., Fu, X., Han, Y., Chang, E., Wu, H., Wang, H., Qi, X. (2013). Preparation, characterization, and photocatalytic activity of TiO2/ZnO nanocomposites. Journal of nanomaterials, 2013, 15.
[29] Topkaya, E., Konyar, M., Yatmaz, H. C., Öztürk, K. (2014). Pure ZnO and composite ZnO/TiO2 catalyst plates: a comparative study for the degradation of azo dye, pesticide and antibiotic in aqueous solutions. Journal of colloid and interface science, 430, 6-11.
Volume 2, Issue 3
July 2016
Pages 143-151
  • Receive Date: 13 June 2015
  • Revise Date: 19 November 2016
  • Accept Date: 22 January 2017
  • First Publish Date: 22 April 2017