<p>In this paper, silica nanoparticles with particle size of ~ 10-20 nm were selected as a support for the synthesis of Co<sub>3</sub>O<sub>4</sub> nanoparticles by impregnation of silica nanoparticles in solution of Co(II) in a specific concentrations and then calcination to 800 <sup>o</sup>C. This nanocomposite was then, used as a catalyst for oxidative degradation of methyl orange (MO) with ammonium persulfate in aqueous media. Effect of pH, temperature, contact time, amount of oxidant and catalyst were studied in the presence of manuscript. Scanning electron microscope (SEM), electron dispersive spectroscopy (EDS), FT-IR, and ICP-AES analyses were used for analysis of silica-supported Co<sub>3</sub>O<sub>4</sub> (Co<sub>3</sub>O<sub>4</sub>/SiO<sub>2</sub>). Treating MO with ammonium persulfate in the presence of Co<sub>3</sub>O<sub>4</sub>/SiO<sub>2 </sub>led to complete degradation of MO under the optimized conditions. Also, the catalyst exhibited recyclability at least over 10 consecutive runs. Copyright © 2016 BCREC GROUP. All rights reserved</p><p><em>Received: 12<sup>nd</sup> December 2015; Revised: 27<sup>th</sup> January 2016; Accepted: 27<sup>th</sup> January 2016</em></p><p><strong>How to Cite</strong>: Baghban, A., Doustkhah, E., Rostamnia, S., Aghbash, K.O. (2016). Silica-Supported Co<sub>3</sub>O<sub>4</sub> Nanoparticles as a Recyclable Catalyst for Rapid Degradation of Azodye. <em>Bulletin of Chemical Reaction Engineering & Catalysis</em>, 11 (3): 284-291 (doi:10.9767/bcrec.11.3.568.284-291)</p><p><strong>Permalink/DOI</strong>: <a href="http://doi.org/10.9767/bcrec.11.3.568.284-291">http://doi.org/10.9767/bcrec.11.3.568.284-291</a></p>
Silica-Supported Co3O4 Nanoparticles as a Recyclable Catalyst for Rapid Degradation of Azodye