Aqueous synthesis of CdO nanoparticles under ultrasonic waves and evaluation of their structural, morphological and optical properties

作者：Javan N S^*; Azizian Kalandaragh Y; Khodayari A

来源：Optoelectronics and Advanced Materials-Rapid Communications, 2013, 7(9-10): 639-642.

• CdO nanoparticles
• Ultrasonic waves
• Quantum confinement effects
• X-ray diffraction

Cd(OH)(2) nanocrystals were prepared by inducement of ultrasonic waves using aqueous solutions of cadmium acetate and sodium hydroxide in presence of 5 mmol 3-Mercaptopropionic acid (3-MPA) as a capping agent. After thermal treatment at 250 degrees C during 1 hour, Cd(OH)(2) nanocrystals transforms to CdO regime. The X-ray diffraction (XRD) studies display that the products are well crystallized in the form of cubic structure. Scanning electron microscope (SEM) images reveal that the product consisting of sphere nanocrystallites of about 30-50nm diameter, which aggregated in the form of polydispersive clusters. Optical measurements indicate a direct band gap of about 3.4 eV. There was observed a blue shift of about 1.1 eV, in comparison to its bulk value due to quantum confinement effects of electrons and holes.

• 出版日期2013-10