Abstract
The newly synthesized CdNa2?2C2O4?2H2O crystals having a size of 0.30 × 0.25 × 0.20 mm3 were grown by the single-diffusion reaction method in the silica gel medium at 28?C temperature. The crystalline nature of crystals was determined in 20 days by 1) varying the concentrations of the feed solutions and the gel pH level, 2) changing the specific gravity of the feed solution, and 3) changing the gel aging period. The crystals were characterized by using the methods such as powder X-ray diffraction, FTIR, UV, SEM-EDAX, TGA/DTA, and micro-hardness test. The structure of as-grown crystals was determined by the powder crystal XRD patterns. FTIR & SEM-EDAX spectral analyses were used to confirm the presence of the required functional groups of as grown crystals. UV absorption spectrum, the absorption peaks at 224.64 nanometer, determined the energy gap. TGA/DTA thermo gram was used to detect the thermal stability of sodium mixed cadmium oxalate dihydrate crystals. The present grown crystals were brittle and also plastic in nature was identified by Vickers micro-hardness test.
Highlights
Single oxalate crystals can be prepared by using the gel growth single-diffusion technique
We have taken an attempt for the first time to grow sodium mixed cadmium dioxalate dehydrate (SCO) crystals in silica gel medium using single diffusion reaction technique
This sodium hydroxide is expected to react with oxalic acid, diffusing in a gel from the supernatant solution and forming sodium mixed cadmium oxalate crystals (SCO) by the following reaction
Summary
Single oxalate crystals can be prepared by using the gel growth single-diffusion technique. We have taken an attempt for the first time to grow sodium mixed cadmium dioxalate dehydrate (SCO) crystals in silica gel medium using single diffusion reaction technique. It acts as bidentate, donor ligand and forms with metal centers chains. The insolubility of oxalates in water [9] is an advantage in growing these crystals by silica gel method, and the gel grown transition metal oxalate materials have attracted many solid state physicists to study their thermal properties and their potential applications in the field of organic semiconductors, analytical chemistry, and in industries [10]. The principal aim of the present study is mainly focused to study the 1) growth of sodium mixed cadmium dioxalate (SCO) crystals in single diffusion technique, 2) optical properties, 3) changes in the physicochemical properties as a function of increasing temperature with time, and 4) mechanical properties of as grown SCO crystals and identifies their potential functional significances in the electronic industries
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