Green Synthesis of CoFe2O4 and Investigation of its Catalytic Efficiency for Degradation of Dyes in Aqueous Medium

Author:

Saeed Muhammad1,Mansha Asim2,Hamayun Muhammad3,Ahmad Aziz4,Ulhaq Atta2,Ashfaq Muhammad1

Affiliation:

1. Department of Chemistry , Government College University Faisalabad , Faisalabad 38000 , Pakistan , e-mail:

2. Department of Chemistry , Government College University Faisalabad , Faisalabad 38000 , Pakistan

3. Department of Chemistry , University of Gujrat, Hafiz Hayat Campus , Gujrat , Pakistan

4. National Center for Nanoscience and Technology , University of Chinese Academy of Sciences , Beijing 100190 , China

Abstract

Abstract The catalytic wet oxidation is one the methods used for elimination of dyes from aqueous medium in which various metal based materials can be used as heterogeneous catalysts. Bimetallic oxides as heterogeneous catalysts have gained much attention as bimetallization improve the catalytic properties of the resulting particles. The biosynthetic green method is the most viable and simple method for synthesis of bimetallic oxides nanoparticles. Here, we report the green synthesis of CoFe2O4 particles using Azadirachata indica leaves extract as reducing and stabilizing agent. The synthesized particles were characterized using X-ray diffraction, thermogravimetric analysis, Fourier-transform infrared spectroscopy and scanning electron microscopy. The synthesized CoFe2O4 particles were tested as a catalyst for mineralization of rhodamine B and methylene blue dyes in the presence of hydrogen peroxide in aqueous media. More than 95% dyes degraded in 120 min. The reaction kinetics was described in terms of Langmuir–Hinshelwood mechanism which suggests that molecules of dye and hydrogen peroxide adsorbed surface of CoFe2O4 and then react together.

Publisher

Walter de Gruyter GmbH

Subject

Physical and Theoretical Chemistry

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