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Graphite sheets have been synthesized by using hexachlorobutadiene (C4Cl6) and Na as reactants at 500 °C in an autoclave. Transmission electron microscopy images show that the average dimension of graphite sheets is about 8 × 15 μm and the thickness ranges 20–50 nm. The possible reaction mechanism is discussed. [Copyright &y& Elsevier]

Amorphous phosphorus nitride (P3N5) hollow spheres were synthesized via reacting PCl3 with NaNH2 at room temperature. Transmission electron microscopy (TEM) images showed the hollow spheres with a diameter of 80–150 nm. X-ray photoelectron spectra (XPS) were used to determine the molar ratio of 1:1.60 for P:N. The optical properties of the as-prepared P3N5 were investigated. [Copyright &y& Elsevier]

Nanocrystalline titanium diboride (TiB2) powders were successfully synthesized at 650 °C by using TiCl4, Mg and MgB2 as the reactants. Transmission electron microscopy images show that typical TiB2 crystallites are composed of uniform particles with the average grain size of about 40 nm. [Copyright &y& Elsevier]