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Vol. 31 No. 12 (2019): Vol 31 Issue 12

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Fabrication of MgFe2O4-ZnO Nanocomposites for Photocatalysis of Organic Pollutants under Solar Light Radiation

https://doi.org/10.14233/ajchem.2019.22368
Krushitha Shetty
Department of Nanotechnology, Visvesvaraya Technological University, P.G. Center, Muddenahalli, Chikkaballapur-562103, India
B.S. Prathibha
Department of Chemistry, B.N.M. Institute of Technology, Bangalore-560070, India
Dinesh Rangappa
Department of Nanotechnology, Visvesvaraya Technological University, P.G. Center, Muddenahalli, Chikkaballapur-562103, India
K.S. Anatharaju
Department of Chemistry, Dayanand Sagar College of Engineering, Kumaraswamy Layout, Bangalore-560078, India
H.P. Nagaswarupa
Research Center, Department of Science, East West Institute of Technology, Bangalore-560091, India
S.C. Prashantha
Research Center, Department of Science, East West Institute of Technology, Bangalore-560091, India

Corresponding Author(s) : B.S. Prathibha

pratbnmit@gmail.com

Asian Journal of Chemistry, Vol. 31 No. 12 (2019): Vol 31 Issue 12

Abstract

MgFe2O4, ZnO and MgFe2O4-ZnO samples were successfully prepared through low temperature solution combustion route. The structural and morphological investigation were accomplished by PXRD, HRSEM, UV-visible and FTIR. The PXRD results point towards the reduced size of synthesized nanocomposites, which was further confirmed by HRSEM studies. Optical properties of the prepared samples were examined by UV-visible spectroscopy. The band gap seems to be widened for prepared nanocomposites compared to pure MgFe2O4. The photocatalytic degradation of methylene blue under sunlight was superior in contrast to pure MgFe2O4 and ZnO. MgFe2O4-ZnO (1:1) acts as the most effective photocatalyst activity compared to pure MgFe2O4 and ZnO. EIS data was proven to be an efficient tool for understanding the electronic properties for photocatalytic studies. The enhanced sunlight-driven photocatalytic activities of MgFe2O4-ZnO nanocomposite is supported by the factors such as quantization effect, band gap widening and efficient charge separation. MgFe2O4-ZnO showed excellent reusability with high photocatalytic efficiencies suggesting its suitability for solar photocatalytic applications. Additionally, scavenging test was conducted to know the role of all active species during photoelectrocatalysis. This work presents a facile and effective route for the construction of MgFe2O4-ZnO nanocomposites with intriguing structures and multiple functions.

Keywords

MgFe2O4-ZnO Photoelectrocatalysis Photoluminescence Electrochemical activity
Shetty, K., Prathibha, B., Rangappa, D., Anatharaju, K., Nagaswarupa, H., & Prashantha, S. (2019). Fabrication of MgFe2O4-ZnO Nanocomposites for Photocatalysis of Organic Pollutants under Solar Light Radiation. Asian Journal of Chemistry, 31(12), 2995–3003. https://doi.org/10.14233/ajchem.2019.22368
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