Synthesis of chain-like MoS_2 nanoparticles in W/O reverse microemulsion and application in photocatalysis  

作　　者：LIU MeiYing LI XiaoQian XU ZhiLing LI BoNa CHEN LinLin SHAN NanNan 

机构地区：[1]Institute of Chemistry.for Functionalized Materials Faculty of Chemistry and Chemical Engineering,Liaoning Normal University,Dalian 116029,China

出　　处：《Chinese Science Bulletin》2012年第30期3862-3866,共5页

基　　金：supported by the National Natural Science Foundation of China (20803033);the National Basic Research Program of China(2009CB220010);the Scientific Research Foundation for the Returned Overseas Chinese Scholars,State Education Ministry;the Scientific Research Fund of Liaoning Provincial Education Department (L2010225)

摘　　要：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.Chain-like MoS2 assemblies consisting of hexagonal MoS2 nanoparticles （20-60 nm） have been successfully synthesized in a Triton X-100/cyclohexane/hexanol/water W/O reverse microemulsion in the presence of （NH4）2MoS4 as the molybdenum source and NH2OH. HCI as the reducing agent. The products were characterized by X-ray powder diffraction （XRD）, transmission elec- tron microscopy （TEM） and UV-vis diffuse reflectance absorption spectra. The influence of synthetic parameters such as acidity, water/oil ratio （coo）, aging time and annealing temperature on the formation of MoS2 assemblies was investigated. TEM analysis showed that these synthetic factors played important roles in controlling the size of MoS2 nanoparticles and the length of the chain-like MoS2 assemblies. XRD analysis indicated that the well-crystallized MoS2 nanoparticles could be obtained by annealing the precursors at 700~C for 2 h under a flow of N2 atmosphere. In addition, the as-prepared chain-like MoS2 nanoparticles exhibited excellent photocatalytic H2 activity in Ru（bpy）3^2＋-MoS2-H2A three-component molecular systems under visible light irradiation.

关 键 词：微乳液合成 二硫化钼 纳米粒子 反相微乳液 光催化 O型 链状 X射线粉末衍射 

分 类 号：TB383.1[一般工业技术—材料科学与工程] O643.3[理学—物理化学]