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Synthesis and Characterization of Nano-/Micro-Crystalline SnO using Microwave and Hydrothermal Techniques

A.M. EL-Rafei, H. Youssef, N. M. Ahmed

Journal of Ceramic Science and Technology, Vol. 5, No. 3 (2014), pp. 217-222

DOI: 10.4416/JCST2014-00010

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Abstract

Microwave (M-H) and conventional hydrothermal (C-H) synthesis of nano-/micro-sized SnO are compared. The phase composition and morphology of the products were investigated by means of X-ray diffraction (XRD) and scanning electron microscopy (SEM), respectively. The XRD results of microwave-heated samples indicated early crystallization of tetragonal romarchite phase after only 1 h at 120 °C compared to 4 h at 120 °C for the conventional method. The crystallization path under microwave heating showed the presence of abhurite phase with an intermediate composition between tin oxide and the starting precursor. Also, romarchite (SnO) decomposes at 700 °C for 1 h in air and transforms into nano-sized cassiterite (SnO2).

Keywords

Tin oxides, semiconductors, microwaves, nanostructures, chemical synthesis

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