Preparation and characterization of Ni(OH)2 nanoparticles coated with dialkyldithiophosphate

Ni(OH), nanoparticles modified with di-n-hexadecyldithiophosphate (DDP) were prepared by a chemical surface modification method. The structure of the nanocluster was investigated using infrared spectroscopy, x-ray photoelectron spectroscopy, x-ray diffraction, transmission electron microscopy, and P-31 nuclear magnetic resonance spectroscopy. The thermal stability of DDP coating on the Ni(OH), nanoparticles was compared to that of pyridinium di-n-hexadecyldithiophosphate (PyDDP) using thermogravimetric analysis. It was found that coated Ni(OH), nanoparticles had an average diameter of about 5 nm, Surface modification with DDP prevented water adsorption and effectively improved the dispersive capacity and antioxidative stability of Ni(OH), nanoparticles, The thermal stability of DDP coatings on the surface of nano-Ni(OH), particles was higher than that of PyDDP coatings because of the chemical interaction between PyDDP and Ni(OH), during the coating process.