Synthesis and Photoactivity of Fe3O4/TiO2-Co as a Magnetically Separable Visible Light Responsive Photocatalyst

Eko Sri Kunarti(1*), Indriana Kartini(2), Akhmad Syoufian(3), Karolina Martha Widyandari(4)

(1) Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Sekip Utara, Yogyakarta 55281, Indonesia
(2) Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Sekip Utara, Yogyakarta 55281, Indonesia
(3) Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Sekip Utara, Yogyakarta 55281, Indonesia
(4) Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Sekip Utara, Yogyakarta 55281, Indonesia
(*) Corresponding Author


Synthesis of magnetic photocatalyst, Fe3O4/TiO2-Co, with characterization and photoactivity examination have been conducted. The synthesis was initiated by preparation of Fe3O4 particles using coprecipitation method. The Fe3O4 particles were then coated with TiO2-Co at a various ratio of Fe3O4:TiO2 and concentration of Co(II) dopant. The Fe3O4/TiO2-Co was characterized by FTIR, XRD, TEM, SEM-EDX, VSM, and SR UV-visible methods. Photoactivity of the Fe3O4/TiO2-Co was carried out using methylene blue as a target molecule in degradation reaction within a batch system. By using optimum conditions, the degradation of methylene blue solution was performed under exposure to UV, visible light and dark condition. Results showed that the Fe3O4/TiO2-Co formation was confirmed by the presence of Fe3O4 and anatase diffraction peaks in the X-ray diffractogram. SR UV-Vis spectra indicated that the Fe3O4/TiO2-Co was responsive to visible light. Band gap energy of the Fe3O4/TiO2-Co with dopant concentration of 1; 5; 10 and 15% were 3.22; 3.12; 3.09 and 2.81 eV, respectively. The methylene blue solution can be well photodegraded at a pH of 10 for 210 min. The Fe3O4/TiO2-Co has the highest ability to methylene blue photodegradation with dopant concentration of 10% gave degradation yield of 80.51 and 95.38% under UV and visible irradiation, respectively.


Fe3O4 /TiO2-Co; photocatalyst; methylene blue; magnetic; visible light

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[1] Hoffmann, M.R., Martin, S.T., Choi, W., and Bahnemann, D.W., 1995, Environmental applications of semiconductor photocatalysis, Chem. Rev., 95 (1), 69–96.

[2] Yin, S., Liu, B., Zhang, P., Morikawa, T., Yamanaka, K., and Sato, T., 2008, Photocatalytic oxidation of under visible led light irradiation over nitrogen-doped titania particles with iron or platinum loading, J. Phys. Chem. C, 112 (32), 12425–12431.

[3] Qiu, R., Zhang, D., Diao, Z., Huang, X., He, C., Morel, J.L., and Xiong, Y., 2012, Visible light induced photocatalytic reduction of Cr(VI) over polymer-sensitized TiO2 and its synergism with phenol oxidation, Water Res., 46 (7), 2299–2306.

[4] Shen, Y., Xiong, T., Du, H., Jin, H., Shang, J., and Yang, K., 2009, Phosphorous, nitrogen, and molybdenum ternary co-doped TiO2: Preparation and photocatalytic activities under visible light, J. Sol-Gel Sci. Technol., 50 (1), 98–102.

[5] Xu, C., Rangaiah, G.P., and Zhao, X.S., 2014, Photocatalytic degradation of methylene blue by titanium dioxide: experimental and modeling study, Ind. Eng. Chem. Res., 53 (38), 14641–14649.

[6] Kunarti, E.S., Syoufian, A., Budi, I.S., and Pradipta, A.R., 2016, Preparation and properties of Fe3O4/SiO2/TiO2 core-shell nanocomposite as recoverable photocatalyst, Asian J. Chem., 28 (6), 1343–1346.

[7] Daghrir, R., Drogui, P., and Robert, D., 2013, Modified TiO2 for environmental photocatalytic applications: A review, Ind. Eng. Chem. Res., 52 (10), 3581–3599.

[8] Kumar, S.G., and Devi, L.G., 2011, Review on modified TiO2 photocatalysis under UV/visible light: Selected result and related mechanisms on interfacial charge carrier transfer dynamics, J. Phys. Chem. A, 115 (46), 13211–13241.

[9] Chen, X., and Mao, S.S., 2007, Titanium dioxide nanomaterials: synthesis, properties, modifications, and applications, Chem. Rev., 107 (7), 2891–2959.

[10] Choi, J., Park, H., and Hoffmann, M.R., 2010, Effects of single metal-ion doping on the visible-light photoreactivity of TiO2, J. Phys. Chem. C, 114 (2), 783–792.

[11] Hamal, D.B., and Klabunde, K.J., 2011, Valence state and catalytic role of cobalt ions in cobalt TiO2 nanoparticle photocatalysts for acetaldehyde degradation under visible light, J. Phys. Chem. C, 115 (35), 17359–17367.

[12] Pozzo, R.L., Baltanás, M.A., and Cassano, A.E., 2010, Supported titanium dioxide as photocatalyst in water decontamination: State of the art, Catal. Today, 39 (3), 219–231.

[13] Liu, H., He, Y., and Liang, X., 2013, Magnetic photocatalysts containing TiO2 nanocrystals: Morphology effect on photocatalytic activity, J. Mater. Res., 29 (1), 98–106.

[14] Widyandari, K.M., 2016, Sintesis Nanokomposit Fe3O4/TiO2-Co dan Uji Aktivitasnya sebagai Fotokatalis, Undergraduate Thesis, Universitas Gadjah Mada, Yogyakarta.

[15] Chatti, R., Rayalu, S.S., Dubey, N., Labhsetwar, N., and Devotta, S., 2007, Solar-based photoreduction of methyl orange using zeolite supported photocatalytic materials, Sol. Energy Mater. Sol. Cells, 91 (2-3), 180–190.

[16] Hamadanian, M., Reisi-Vanani, A., and Majedi, A., 2010, Sol-gel preparation and characterization of Co/TiO2 nanoparticles: applications to the degradation of methyl orange, J. Iran. Chem. Soc., 7 (Suppl. 2), S52–S58.

[17] Mital, G.S., and Manoj, T., 2011, A review of TiO2 nanoparticles, Chin. Sci. Bull., 56 (16), 1639–1657.

[18] Belessi, V., Romanos, G., Boukos, N., Lambropoulou, D., and Trapalis, C., 2009, Removal of reactive red 195 from aqueous solutions by adsorption on the surface of TiO2 nanoparticles, J. Hazard. Mater., 170 (2-3), 836–844.

[19] Abkenar, S.D., 2016, Application of magnetic-modified Fe3O4 nanoparticles for removal of crystal violet from aqueous solution: Kinetic, equilibrium and thermodynamic studies, J. Appl. Chem. Res., 10 (1), 65–74.


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