Efficient adsorption separation of methane from C_(2)-C_(3) hydrocarbons in a Co(Ⅱ)-nodes metal-organic framework

Methane(CH_(4))as a substitute for other mineral fuels plays a crucial role in reducing energy consumption and preventing environmental pollution.The present study employs a solvothermal method to fabricate a porous framework Co-metal-organic framework(Co-MOF)containing two distinct secondary building units(SBUs):an anionic[Co_(2)(μ_(2)-OH)(COO)_(4)(H_(2)O)]and a neutral[CoN_(2)(COO)_(2)].Notably,within the anionic SBUs,the coordinated water molecules induce the generation of divergent unsaturated Co(Ⅱ)centers in the unidirectional porous channels,thereby creating open metal sites.The adsorption performance of Co-MOF towards pure component gases was systematically investigated.The results demonstrated that Co-MOF exhibits superior adsorption capacity for C_(2)-C_(3) hydrocarbons compared to CH_(4),which offers the potential for efficient adsorption and separation of CH_(4) from C_(2)-C_(3) hydrocarbons.The gas selectivity separation ratios of Co-MOF for C_(2)H_(6)/CH_(4) and C_(3)H_8/CH_(4) were calculated using the ideal adsorbed solution theory method at 273/298 K and 0.1 MPa.The results revealed that Co-MOF achieved remarkable equilibrium separation selectivity for CH_(4) and C_(2)-C_(3) hydrocarbon gases among non-modified MOFs,signifying the potential of the synthesized Co-MOF for efficient recovery and purification of CH_(4) from C_(2)-C_(3) hydrocarbons.Breakthrough experiments further demonstrate the ability of Co-MOF to purify methane from C_(2)-C_(3) hydrocarbons in practical gas separation scenarios.Additionally,molecular simulation calculations further substantiate the propensity of anionic SBUs to interact with C_(2)-C_(3) hydrocarbon compounds.This study provides a novel paradigm for the development of porous MOF materials in the application of gas mixture separation.

什么是“好政策”?——公共政策质量研究综述

公共政策质量是决定国家发展绩效的重要因素。政策质量研究需要回答三个基本问题:公共政策质量的内涵是什么?影响因素有哪些?如何提升公共政策质量?公共政策质量内涵形成了质量本质、政策成败和政策过程三大研究进路。高质量公共政策应对外部环境具有较强回应性、制定过程和政策内容合情合理合法、切实关照利益相关者利益、执行有效和结果合乎政策目标。研究发现,政策环境、政策系统、政策行动者、政策能力和政策资源是影响公共政策质量的重要因素。因此,应树立全系统、全过程和整体性的公共政策质量管理体系,从制度化的政策体系、科学化的制定过程、有效的政策执行和合乎目标的政策产出四个方面提升公共政策质量。未来需要通过更多的实证研究检验公共政策质量的影响因素及其权重,以更深度的案例研究推动中国公共政策质量持续优化,以触发更多的“好政策”,提升公共政策绩效,推动国家治理现代化。

有机化学课程思政体系的构建方法与实践

理工科类专业课融入思政元素,实现知识传授的同时,发挥价值引领作用是践行“立德树人根本任务”的关键环节。基于有机化学课程教学方法改革,构建了“三个载体+四种途径”的有机化学课程思政体系,即以“理论教学、实验应用和卓越创新”三个教学模块为载体,“显性引导与隐性熏陶相结合、情境体验式、任务驱动式和专题嵌入式”为四种实现途径。并以“重氮化合物和偶氮化合物”为教学案例阐述全方位、多途径将思政元素与理论知识相融合的方法,培养出“有理想、有追求、有担当、有作为、有品质、有修养”的六有化学本科生,促进学生的全面发展。