Moreno B, Vidoni O, Ovalles C, Chaudret B, Urbina C, Krentzein H
INTEVEP, S.A., Apdo. 76343, Caracas, 1070A, Venezuela
J Colloid Interface Sci. 1998 Nov 15;207(2):251-257. doi: 10.1006/jcis.1998.5631.
The synthesis and characterization of molybdenum colloidal particles were evaluated using thermal and sonochemical methods and starting from different metal precursors, Mo(CO)6 and (NH4)2MoS4. The products were characterized by elemental analysis, spectroscopic (UV, FTIR), and surface analysis (XPS) techniques, as well as by transmission electron microscopy (TEM) for determining the particle sizes. Using Mo(CO)6 as metal source, particle sizes with an average diameter of 1.5 nm can be obtained using tert-amyl alcohol as solvent and tetrahydrothiophene as sulfurating ligand. The characterization of these particles showed that they are composed of molybdenum oxide MoO3. Using (NH4)2MoS4 as metal precursor, particles with average diameters of 4.7 and 2.5 nm were synthesized using thermal and sonochemical methods, respectively. The characterization of these particles showed them to be composed of molybdenum sulfide, MoS2. The sonochemical method proved to be the fastest and most convenient synthetic pathway of obtaining small colloidal particles at low temperatures and with control of the average size. Copyright 1998 Academic Press.
采用热法和超声化学法，以不同的金属前驱体Mo(CO)₆和(NH₄)₂MoS₄为原料，对钼胶体颗粒的合成及表征进行了评估。通过元素分析、光谱（紫外、傅里叶变换红外光谱）和表面分析（X射线光电子能谱）技术，以及通过透射电子显微镜（TEM）测定颗粒尺寸，对产物进行了表征。以Mo(CO)₆作为金属源，使用叔戊醇作为溶剂、四氢噻吩作为硫化配体，可以获得平均直径为1.5 nm的颗粒。对这些颗粒的表征表明它们由氧化钼MoO₃组成。以(NH₄)₂MoS₄作为金属前驱体，分别使用热法和超声化学法合成了平均直径为4.7和2.5 nm的颗粒。对这些颗粒的表征表明它们由硫化钼MoS₂组成。超声化学法被证明是在低温下获得小胶体颗粒且能控制平均尺寸的最快、最便捷的合成途径。版权所有1998年学术出版社。
