A low-temperature solvothermal method to prepare hollow spherical WS2 nanoparticles modified by TOA

Tungsten disulfide hollow spherical nanoparticles with diameters of about 100 nm modified by trioctylamine (TOA) have been successfully prepared by a solvothermal process in pyridine. For comparison, WS2 sample was also prepared without TOA modification and sheet-like pieces and their irregular aggregates were obtained. The products were characterized by X-ray power diffraction (XRD), X-ray photoelectron microscopy (XPS), transmission electron microscopy (TEM) and high revolution transmission electron microscopy (HRTEM), respectively.