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首页> 外文期刊>The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical >Generation of atomistic models of periodic mesoporous silica by kinetic Monte Carlo simulation of the synthesis of the material
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Generation of atomistic models of periodic mesoporous silica by kinetic Monte Carlo simulation of the synthesis of the material

机译:通过材料合成的动力学蒙特卡洛模拟生成周期性介孔二氧化硅的原子模型

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摘要

We have developed a molecular simulation method for the generation of realistic atomic-level models for periodic mesoporous silicas. Using simplified interaction potentials and simplified representations of the templating micelles, the simulation follows the reaction path of the hydrothermal synthesis and calcination of the silica material in a kinetic Monte Carlo (kMC) simulation. The only input to the simulation is the geometry of the micelle and the number of silicic acid monomers at the beginning of the synthesis. We simulated the adsorption properties of the PMS models using Grand Canonical Monte Carlo simulation. With use of MCM-41 materials of different pore sizes as a prototype material, experimental and simulated adsorption isotherms for nitrogen, ethane, and carbon dioxide were compared, showing good agreement between simulation and experiment.
机译:我们已经开发了一种分子模拟方法,可以生成周期性介孔二氧化硅的真实原子级模型。使用简化的相互作用势和模板胶束的简化表示,该模拟遵循动力学蒙特卡罗(kMC)模拟中二氧化硅材料的水热合成和煅烧的反应路径。模拟的唯一输入是胶束的几何形状以及合成开始时硅酸单体的数量。我们使用Grand Canonical Monte Carlo模拟法模拟了PMS模型的吸附特性。以不同孔径的MCM-41材料为原型材料,比较了氮,乙烷和二氧化碳的实验和模拟吸附等温线,表明模拟和实验之间具有良好的一致性。

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