Synthesis and Characterization of CdO–SnO2 Nanocomposites Prepared by Hydrothermal Method

Abstract

In this work, (1-x)CdO-xSnO 2 nanocomposites (B 0.15) have been synthesized via hydrothermal route. The structural study reveals that CdO nanostructures possess crystalline phase and cubic structure. The CdO-SnO 2 nanocomposites possess both cubic and orthorhombic structure with good crystallinity. The crystallite size in the nanocomposites was found to be in the range of 9.6-19.6 nm. Field emission scanning electronic microscopy and highresolution tunnelling microscopy analysis confirm the presence of both cubic and orthorhombic structures which is also confirmed from X-ray diffraction studies. Fourier transform infrared spectroscopy (FTIR) studies confirm that CdO-SnO 2 nanocomposites possess the characteristics band of both CdO and SnO 2 nanostructures. The UV-visible absorption studies confirm that the optical absorption band in CdO-SnO 2 nanocomposites possesses both blue and red shift as compared to that of CdO nanostructures. Photoluminescence spectroscopy studies reveal the appearance of strong emission peak at 513, 469 and 369 nm corresponding to green, blue and violet emission spectrum, respectively, in CdO-SnO 2 nanocomposites. The FTIR studies confirm the presence of hydroxyl and water functional group due to atmospheric water vapours and chemical bonding in CdO and CdO-SnO 2 nanocomposites. Raman spectroscopy confirms the presence of Raman bands of both CdO and SnO 2 phases in the CdO-SnO 2 nanocomposites.

Highly efficient and stable AgI–CdO nanocomposites for photocatalytic and antibacterial activity

“…78,79 Whereas, the pure CdO showed an absorption peak at 430 cm −1 for CdO vibrational modes. 69,80 On the other hand, all AgI–CdO nanocomposite samples displayed a significant shift with the appearance of a sharp and broad signal at 3600 & 1443 cm −1 for O–H. In addition, a small peak at 430 cm −1 for CdO is shown as a sharp and strong peak in all composite materials.…”