Silver Iodide Nanoparticles Using a Spinning Disk Reactor

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Silver Iodide Nanoparticles Using a Spinning Disk Reactor ( silver-iodide-nanoparticles-using-spinning-disk-reactor )

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The 1st International Seminar on Fundamental and Application ISFAChE 2010 of Chemical Engineering November 3-4, 2010, Bali-Indonesia Figure 3: XRD Patterns of Synthesized AgI Particles of Run 0401 Effects of reactant concentration In this series of experiments, the reactant (AgNO3 and KI) concentrations were varied from 0.03 to 0.20 M. The concentrations of AgNO3 and KI were the same. Other fixed operation variables were indicated in Table 2, in which the yields were presented. When the reactant concentration increased from 0.03 to 0.20 M, the yield of AgI increased from 55% to 100%. The SEM micrographs of the AgI particles at a reactant concentration of 0.03 g/L, 0.05 g/L, 0.10 g/L, and 0.20 g/L are shown in Figures 4(a), 4(b), 4(c)and 4(d), respectively. The particle size gradually decreased when the reactant concentration increased. A higher concentration of reactants resulted in a higher reaction rate that increased the supersaturation and the yield improved for the same reaction time i.e., the same retention time on the rotating disk. In general, higher supersaturation resulted in more and smaller primary particles. Table 2: Effect of Reactant Concemtration on Yield. Other Operating Variables Kept Constant are: LA=LB=0.5 L/min, [PEG]=5.0g/L, N=4000 rpm Run No. 0926 0924 0331 0327 Reactant Concemtration (M) 0.03 0.05 0.10 0.20 Yield (%) 55 71 94 100 (a) (b) E002-4

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