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所在平台: Udemy |
课程主页: https://www.udemy.com/course/course-of-bet-surface-analysis/
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**Coursera 课程总结：BET 表面分析** 本课程深入介绍了BET（Brunauer-Emmett-Teller）表面分析方法，这是一种基于气体吸附的材料表面性质分析技术。课程将涵盖BET理论的核心概念、不同类型的吸附等温线及其物理意义，以及在材料科学中常见的滞后现象。 **核心内容包括：** * **BET模型理论：** 详细讲解BET方程及其组成部分，阐述其在计算固体材料比表面积方面的原理。 * **吸附等温线类型与滞后：** 探讨不同吸附等温线的形状，以及它们如何反映材料的孔隙结构特征，并解释滞后现象的成因。 * **样品制备：** 重点介绍样品称量和脱气（Degassing）过程，这是获取准确BET分析结果的关键步骤。 * **实验操作：** 以Quantachrome公司的NOVA 4200仪器为例，演示气体吸附分析的实验流程。 * **数据处理：** 讲解如何使用NOVAWin软件处理吸附等温线数据，计算材料的比表面积、孔容和孔径分布。 **学习目标：** 通过学习本课程，您将对BET表面分析有深刻的理解，并掌握在催化剂、药物、陶瓷、碳材料、吸附剂、金属有机骨架材料和建筑材料等领域的实际应用技能。您将能够自信地进行BET实验，处理实验数据，并解读分析结果。
Adsorption isotherms show how gases adhere to the surface of a solid (adsorbent) at different pressures. Based on nitrogen gas adsorption, the BET method is essential for analyzing materials such as catalysts, pharmaceuticals, ceramics, carbons, sorbents, metal-organic frameworks, and building materials. This course provides fundamental knowledge and practical skills in surface area analysis, pore volume, and material pore distribution.Topics We Will Discuss:Theory of the BET model, Types of Isotherms, and HysteresisSample Preparation (Weighing and Degassing process)Experimental Procedure with the Quantachrome InstrumentProcessing Experimental Data using the NovaWin ProgramThe BET theory is a mathematical model used to calculate the surface area of a solid. We'll consider the BET equation and its parts. We will look at some of the different isotherm profiles that can form as the adsorption proceeds, which depend on the porous features of the sample and give a good picture of the range and complexity of possible isotherm profiles. In the part of Sample preparation, we'll pay attention to the degassing process. We'll look at a machine called NOVA 4200, produced by Quantachrome. We'll also use the NOVA Win program to work with a gas sorption analyser.By enrolling, you'll gain a deep understanding of these concepts and their applications in real-world scenarios.
