Yiya Peng

Microwave-templated synthesis of CdS nanotubes in aqueous solution at room temperature

CdS nanotubes were synthesized via a new method, which employed TM01-type microwave irradiation as a template. The reactions were completed in aqueous solution at room temperature. The products were investigated with X-ray diffraction, transmission electron microscopy and high-resolution transmission electron microscopy. The formation mechanism of CdS nanotubes with a face centered cubic structure is proposed.

α -MnSe crystallites through solvothermal reaction in ethylenediamine

Abstract α-MnSe crystallites were prepared by solvothermal reaction in ethylenediamine at 190 °C. X-ray diffraction gave the α-MnSe phase of product, X-ray photoelectron spectroscopy indicated the valence state of Mn2+ and Se2−. The flaky morphology was found by the transmission electron microscope images. The optimal synthetic conditions were explored by using other nitrogen-containing solvents, and lowering the reaction temperature.

Solvothermal-reduction route to nanocrystalline α- and β-NiS

Nanocrystalline α-NiS and β-NiS were synthesized through a solvothermal reducing process at 110 °C with ethanol and pyridine as solvent, respectively. X-ray diffraction (XRD), inductively coupled plasma-atomic emission spectra (ICP-AES) and transmission electron microscopy (TEM) were used to characterize the samples. In this reaction, due to the different properties of the solvents, solvent determines the phases of as-prepared NiS. And it was found that the as-prepared α-NiS had higher phase stability than the normal NiS.

Growth of 5H-type silicon carbide whisker

Abstract During a study of graphitization in a commercial Acheson furnace, alpha silicon carbide whiskers were accidentally found, which belongs to the 5H-type. The whiskers are about 2–300 μm in diameter and 5–50 mm long. The whiskers were studied by XRD and SEM, and the formation conditions of the whiskers were discussed.

Cu5.5FeS6.5 nanotubes—a new kind of ternary sulfide nanotube

A new kind of ternary sulfide nanotubes, Cu5.5FeS6.5 nanotubes, was synthesized in autoclaves at 195 °C and it was found that armchair, zigzag and complex arrangements exist in the nanotubes.