FeS2 nanocrystals were synthesized by the reaction of Fe(NO3)3·9H2O with NH2CSNH2 in ethylene glycol via a solvothermal process using PVP as surfactant.The products were characterized by XRD and TEM.The results show that PVP plays a significant effect on the phase and morphology of the as-synthesized nanocrystal FeS2.
Chain-like MoS2assemblies consisting of hexagonal MoS2nanoparticles(20-60 nm) have been successfully synthesized in a Triton X-100/cyclohexane/hexanol/water W/O reverse microemulsion in the presence of(NH 4)2MoS 4 as the molybdenum source and NH2OH·HCl as the reducing agent.The products were characterized by X-ray powder diffraction(XRD),transmission electron microscopy(TEM) and UV-vis diffuse reflectance absorption spectra.The influence of synthetic parameters such as acidity,water/oil ratio(0),aging time and annealing temperature on the formation of MoS2assemblies was investigated.TEM analysis showed that these synthetic factors played important roles in controlling the size of MoS2nanoparticles and the length of the chain-like MoS2assemblies.XRD analysis indicated that the well-crystallized MoS2nanoparticles could be obtained by annealing the precursors at 700 C for2h under a flow of N2atmosphere.In addition,the as-prepared chain-like MoS2nanoparticles exhibited excellent photocatalytic H2activity in Ru(bpy) 3 2+-MoS2-H2A three-component molecular systems under visible light irradiation.
LIU MeiYingLI XiaoQianXU ZhiLingLI BoNaCHEN LinLinSHAN NanNan
