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FeS_(2) (pyrite) electrodeposition thin films and study of growth mechanism

Science china(Technological Sciences) 2005年第6期48卷 601-611页

作者： dong youzhong1. zheng yufeng1. zhang xiaogang2, duan he1. sun yanfei1.& chen yanhua1.1. department of physics, xinjiang university, urumqi 830046, china 2. Institute of Applied Chemistry, xinjiang university, urumqi 830046, china 1. department of physics Xinjiang University 830046 Urumqi China 2. Institute of Applied Chemistry Xinjiang University 830046 Urumqi China

Ferrous sulfide (FeS) thin films were initially electrodeposited on indium-tin oxide (ITO) substrates in the aqueous solution containing iron, sulfur elements and then annealed in the sulfur atmosphere. Thereby, we successfully obtained the single-phased iron pyrite (FeS2) thin films with good quality. The experimental parameters for electrodeposition and the post-growth thermal-dynamical conditions have been calculated so that more details about the effect of thermal-dynamical conditions on the micromechanism concerned with the iron pyrite crystal growth as well as the properties of the samples have been discussed.

关键词： electrodeposition, FeS2 (pyrite), thin films, growth dynamics.

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Solvothermal synthesis of nanocrystalline FeS_2

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Science china(physics,Mechanics & Astronomy) 2005年第2期48卷 188-200页

作者： chen {1.1, zheng yufeng1. zhang xiaogang2, sun yanfei1.& dong youzhong1.. physics department of xinjiang university, urumqi 830046, china 2. Institute of Applied Chemistry of xinjiang university, urumqi 830046, china physics department of xinjiang university Urumqi 830046 China Institute of Applied Chemistry of xinjiang university Urumqi 830046 China

This paper reports on the synthesis of the nanocrystalline FeS2 via a solvent-thermal process. Using FeSO4 and NH2CSNH2 as precursors and polyvinyl- pyrrolidone (PVP) as a protective agent (dispersant), we have successfully synthesized nanocrystalline FeS2 both under acidic conditions (pH = 5) and under alkali conditions (pH = 10) at various temperatures and for different time in alcohol-water solution. X-ray diffraction (XRD), Transmission electron microscopy (TEM) and Ultraviolet Visible (UV-VIS) spectroscopy were used to characterize the morphology, structure, particle size and optical characterization of sample synthesized under acidic condition, and the XRD pattern was refined by Rietveld method. The experimental result shows that nanocrystalline FeS2 with uniform size, highly crystallized quality and excellent dispersivity has been synthesized at 200℃for 36 h.

关键词： FeS2 (Pyrite), solvothermal, PVP, the Rietveld method.

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