Issue 42, 2016, Issue in Progress
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RSC Advances

Ca(OH)2 nano-pods: investigation on the effect of solvent ratio on morphology and CO2 adsorption capacity

Farah Diana Mohd Daud,ab   Kumaravel Vignesh,*ac   Srimala Sreekantan,*a   Abdul Rahman Mohamed,d   Misook Kang*e  and  Byeong Sub Kwake  

* Corresponding authors

a School of Materials and Mineral Resources Engineering, Engineering Campus, Universiti Sains Malaysia (USM), Nibong Tebal, Penang, Malaysia
E-mail: sreekantansrimala1974@gmail.com, vignesh134@gmail.com
Fax: +60-604-5941011
Tel: +60-604-5995215

b Department of Manufacturing and Materials Engineering, Faculty of Engineering, International Islamic University Malaysia (IIUM), P.O. Box 10, 50728 Kuala Lumpur, Malaysia

c Anano Sphere Sdn Bhd, Lorong Industri 11, Kawasan Industri Bukit Panchor, Nibong Tebal 14300, Penang, Malaysia

d School of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia (USM), Nibong Tebal, Penang, Malaysia

e Department of Chemistry, College of Science, Yeungnam University, Gyeongsan, Gyeongbuk 712-749, Republic of Korea
E-mail: mskang@ynu.ac.kr

Abstract

Ca(OH)2 nano-pods were synthesized through a precipitation method. Solvents such as ethanol/deionized water (DIW) and dimethylformamide (DMF)/deionized water (DIW) were used at different volume ratios to synthesize the samples. Various characterization techniques such as X-ray diffraction (XRD), filed emission scanning electron microscopy (FESEM), high resolution transmission electron microscopy (HRTEM) and BET surface area analysis were employed to investigate the role of solvent on the crystallinity, morphology and surface area of Ca(OH)2. The solvent mixtures with a high volume of organic solvent (ethanol or DMF) acted as good capping agents to suppress the growth of Ca(OH)2 in the (1010) direction and induce anisotropic growth along the (0001) direction. A uniform pod like morphology was observed for the Ca(OH)2 sorbent synthesized using ethanol/DIW with a volume ratio of 78 ml/02 ml. Besides, the sorbents synthesized using ethanol/DIW showed good CO2 adsorption capacity and high surface area when compared to that of DMF/DIW.

Graphical abstract: Ca(OH)2 nano-pods: investigation on the effect of solvent ratio on morphology and CO2 adsorption capacity

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Article information

DOI
https://doi.org/10.1039/C5RA27771J
Article type
Paper
Submitted
26 Dec 2015
Accepted
31 Mar 2016
First published
08 Apr 2016

RSC Adv., 2016,6, 36031-36038

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Ca(OH)2 nano-pods: investigation on the effect of solvent ratio on morphology and CO2 adsorption capacity

F. D. Mohd Daud, K. Vignesh, S. Sreekantan, A. R. Mohamed, M. Kang and B. S. Kwak, RSC Adv., 2016, 6, 36031 DOI: 10.1039/C5RA27771J

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