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Advances in Nano Research Volume 15, Number 1, July 2023 , pages 35-48 DOI: https://doi.org/10.12989/anr.2023.15.1.035 |
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Sol-gel synthesis, computational chemistry, and applications of Cao nanoparticles for the remediation of methyl orange contaminated water |
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Nnabuk Okon Eddy, Rajni Garg, Rishav Garg, Samson I. Eze, Emeka Chima Ogoko, Henrietta Ijeoma Kelle, Richard Alexis Ukpe, Raphael Ogbodo and Favour Chijoke
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| Abstract | ||
| Nanoparticles are known for their outstanding properties such as particle size, surface area, optical and electrical properties. These properties have significantly boasted their applications in various surface phenomena. In this work, calcium oxide nanoparticles were synthesized from periwinkle shells as an approach towards waste management through resource recovery. The sol gel method was used for the synthesis. The nanoparticles were characterized using X-Ray diffractometer (XRD), Fourier Transformed Infra-Red Spectrophotometer (FTIR), Brunauer Emmett Teller (BET), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and ultra violet visible spectrophotometer (UV-visible). while DLS and SEM underestimate the particle diameter, the BET analysis reveals surface area of 138.998 m2/g, pore volume = 0.167 m3/g and pore diameter of 2.47 nm. The nanoparticles were also employed as an adsorbent for the purification of dye (methyl orange) contaminated water. The adsorbent showed excellent removal efficiency (up to 97 %) for the dye through the mechanism of physical adsorption. The adsorption of the dye fitted the Langmuir and Temkin models. Analysis of FTIR spectrum after adsorption complemented with computational chemistry modelling to reveal the imine nitrogen group as the site for the adsorption of the dye unto the nanomaterials. The synthesized nanomaterials have an average particle size of 24 nm, showed a unique XRD peak and is thermally and mechanically stable within the investigated temperature range (30 to 70 °C). | ||
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| Address | ||
| Nnabuk Okon Eddy, Samson I. Eze and Favour Chijoke: Department of Pure and Industrial Chemistry, University of Nigeria, Nsukka, Enugu State, Nigeria Rajni Garg: Department of Applied Sciences, Galgotias College of Engineering & Technology, Greater Noida, Uttar Pradesh 201310, India Rishav Garg: Department of Civil Engineering, Galgotias College of Engineering & Technology, Greater Noida, Uttar Pradesh 201310, India Emeka Chima Ogoko and Henrietta Ijeoma Kelle: Department of Chemistry, National Open University of Nigeria, National Headquarter, Jabbi, Abuja, Nigeria Richard Alexis Ukpe: Department of Chemistry, Federal University, Otuoke, Bayelsa State, Nigeria Raphael Ogbodo: Department of Chemistry, University of Iowa, Iowa City, 52244 Iowa, USA | ||