Controlled synthesis, characterization, and crystallization of Ni-P nanospheres

Article Abstract:

The size-and composition-controlled synthesis of Ni-P nanospheres from Nickel chloride and sodium hypophosphite is investigated by changing conditions like the ratio of starting materials, pH value, and reduction temperature to find that the nominal H2PO2(super -)/Ni(sub 2+) ratio, pH, and reduction temperature can affect the size and composition of the Ni-P nanospheres in different ways. The behavior of crystallization of the Ni-P nanospheres is affected by phosphorous concentration, to form either Ni3P and fccNi with low levels of phosphorous content or form metastable Ni12P5 and Ni5P2 phases and coated with P-rich shell with high phosphorus concentrations.

Industrial inorganic chemicals, not elsewhere classified, Nickel Compounds, Sodium Hypophosphite, Structure, Chemical properties, Nanoparticles

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Temperature-dependant Raman scattering of silicon nanowires

Article Abstract:

The analyses of the phonon confinement effect, anharmonic phonon processes and lattice stress effect is conducted to study the temperature-dependency of the Raman Scattering of the silicon nanowires. The results show that the relative intensities of silicon nanowires are larger than that of bulk silicon and also increase with the increase in temperature.

Silicon & Inorganic Compounds, Optical properties, Phonons, Raman effect, Silicon compounds, Atomic properties

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Comparative X-ray photoelectron spectroscopic study on the desulfurization of thiophene by Raney nickel and rapidly quenched skeletal nickel

Article Abstract:

The desulfurization of thiophene on Raney Ni and rapidly quenched skeletal Ni (RQ Ni) is studied in ultrahigh vacuum by X-ray photoelectron spectroscopy. The lower reactivity of RQ Ni toward thiophene is tentatively attributed to lattice expansion of Ni crystallites in RQ Ni due to rapid quenching.

Science & research, Primary nonferrous metals, not elsewhere classified, Primary Smelting and Refining of Nonferrous Metal (except Copper and Aluminum), Primary Nickel, Refined Nickel, Research, X-ray spectroscopy, Nickel, Thiophene, Nickel (Metal)

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