Samanta, Aniruddha and Chanda, Dipak K and Das, Pradip Sekhar and Ghosh, Jiten and Mukhopadhyay, Anoop Kumar and Dey, Arjun (2016) Synthesis of Nano Calcium Hydroxide in Aqueous Medium. Journal of the American Ceramic Society, 99 (3). pp. 787-795. ISSN 0002-7820

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Abstract

The present work reports a simple, inexpensive method for synthesis of calcium hydroxide Ca(OH)(2)] nanoparticles (CHNPs). The method involves chemical precipitation (CP) in aqueous medium at room temperature. Calcium nitrate dihydrate Ca(NO3)(2).2H(2)O] and sodium hydroxide were used as precursors. The CHNPs were characterized by Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), Rietveld analysis, field-emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM), BET surface area evaluation as well as particle size distribution analysis techniques. The results confirmed the synthesis of CHNPs as the major phase. The CHNPs exhibited an average size of about 350 nm. In addition, some calcite phase formed due to the inevitable carbonation process. A very minor amount of aragonite phase was also present. A schematically developed new qualitative model is proposed to explain the genesis and subsequent evolution of the various phases at the nanoscale. The model helps to identify the rate-controlling step. It also highlights the implication of reaction kinetics control in synthesis of predesigned nanophase assembly.

Item Type:	Article
Subjects:	Engineering Materials
Divisions:	Non-Oxide Ceramics & Composites
Depositing User:	Bidhan Chaudhuri
Date Deposited:	07 Nov 2016 11:42
Last Modified:	07 Nov 2016 11:42
URI:	http://cgcri.csircentral.net/id/eprint/3668

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