Efficient magnetic and antibacterial properties of CdO/ZnO nanocomposites prepared via facile hydrothermal method

Abstract

The effect of molar composition on the efficiency of antibacterial and magnetic properties of binary transition metal oxide nanocomposites synthesized using pH optimized hydrothermal method is reported. Its response to X-ray diffraction confirmed the crystallinity of nanocomposites. The average crystallite size is observed to be 27.37 nm, 30.21 nm and 32.3 nm for 1:1, 2:1 and 1:2 molar ratioed CdO/ZnO nanocomposites respectively. FT-IR spectroscopy revealed the presence of moisture and other functional groups, which is further confirmed the Thermogravimetric analysis showing approximately 1.5% of thermal decomposition within 200 °C in all composition. The synthesized composites are characterized for surface morphology using High-resolution scanning electron microscopy and Energy dispersive X-ray analysis showed mixed nanorods, nanotubes and spheroid structures. The optical band gap of proposed nanocomposites is characterized by UV-diffused reflectance spectroscopy showing the variation of optical band gap confirming the change in a molar proportion of CdO/ZnO nanocomposites particles. Investigation on magnetic properties displayed its paramagnetic behavior by illustrating the hysteresis curves of all nanocomposites. The antibacterial activities of proposed nanocomposites investigated for both Gram-positive and Gram-negative bacteria showed its efficiency towards antibacterial application.

Keywords

• Fuel and capping agent free
• Magnetic properties
• Antibacterial activity
• Streptococcus pyogenes
• Klebsiella pneumonia