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Construction and implementation of safety curriculum system for cross-disciplinary laboratories in colleges and universities
Experimental Technology and Management 2023, 40(11): 7-14,34
Published: 20 November 2023
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With the deepening of scientific research and the increasing of interdisciplinary crossover, laboratory safety education faces many problems such as diversified personnel disciplinary backgrounds, inconsistent basic level, curriculum to be optimized, and professionalism and systematicity of teaching implementation to be strengthened. This paper proposes the construction and implementation of a set of laboratory safety curriculum system that adapts to the needs of interdisciplinary development. Firstly, from the theoretical and practical perspectives, the construction concept and key contents of the laboratory safety course system adapted to the development of cross-disciplinary development are analyzed in depth, including the educational concept, teaching objectives, curriculum, organization and implementation, and evaluation of the effect of various aspects. Then, taking the practice of laboratory safety education in a university as an example to analyze the specific method of constructing the laboratory safety MOOC that adapts to the cross-disciplinary needs of electrical and chemical, biological and other disciplines. Finally, discussing the strategy of laboratory safety education access implementation in the light of students’ development needs and talent cultivation programs. By exploring the theory and practice of laboratory safety education, it is hoped to provide new ideas and strategies for improving the level and effectiveness of laboratory safety education in colleges and universities.

Research Article Issue
Direct imaging and mechanism study of C6 α-olefin adsorption on faujasite and Linde Type A zeolites
Nano Research 2022, 15(6): 5322-5330
Published: 15 March 2022
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Linear α-olefins are important chemical raw materials. To purify α-olefins from a high-temperature Fischer–Tropsch synthetic oil, it is necessary to separate the α-olefins from the paraffins, which is challenging. Adsorption separation by zeolites is a promising alternative to energy-intensive distillation for α-olefin/paraffin separation. An integrated differential phase-contrast scanning transmission electron microscopy (iDPC-STEM) technique is used in combination with density functional theory (DFT) simulations and batch adsorption experiments to study the adsorption behavior of C6 α-olefins and the mechanism of selective adsorption of C6 α-olefin/paraffin. Direct electron microscopy real-space imaging of the atomic frameworks of the faujasite (FAU) and Linde Type A (LTA) zeolites and the C6 α-olefin-adsorption positions on their lattices is achieved through iDPC-STEM. The images provide direct evidence that C6 α-olefins preferentially adsorb at the edges of the FAU and LTA zeolite cavities. DFT calculations further reveal the relationship between host–guest interactions and different molecular orientations. Calculated and experimental results also show that the presence of calcium cations can enhance the selectivity of zeolites for α-olefin/paraffin adsorption. This work provides a means to investigate the behavior of guest molecules and the host–guest interactions in the adsorption or catalytic process of nanoporous materials.

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