<br>通过咪唑和碳纳米管纸的耦合优化二氧化碳吸附/解吸，以实现从环境空气中自发吸收二氧化碳和太阳能驱动的释放,Advanced Functional Materials

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通过咪唑和碳纳米管纸的耦合优化二氧化碳吸附/解吸，以实现从环境空气中自发吸收二氧化碳和太阳能驱动的释放
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2024-04-15 , DOI: 10.1002/adfm.202400423
Chujia Li _{1,

2} , Xuebo Cao ₁ , Guangchun Liu ₁ , Lin Huang ₁ , Mingming Chu ₁ , Ruobing Cheng ₁ , Aijun Wang ₂ , Zhen Xu ₃

Affiliation

直接空气捕获(DAC) 是一种减轻温室效应的可持续技术，也是获取取之不竭的CO ₂用于生产昂贵的化学品和能源产品的可靠途径。目前使用胺相关吸附剂的DAC技术依赖于化学吸附，同时它们消耗大量能量用于CO ₂释放和通过加热再生吸附剂。开发具有弱可逆吸附的新 DAC 工艺可以大幅降低再生能量。在此，展示了CO ₂呼吸纸（CBP）的设计用于从环境空气中自发提取CO ₂并进行太阳能驱动的再生。 CBP是在密度泛函理论计算的基础上，通过将2-乙基-4-甲基咪唑偶联到碳纳米管纸上而制备的。在环境条件下，CBP 在 0–35 °C 下通过非共价静电相互作用自发捕获大气中的 CO ₂ ，容量为 0.14–1.75 mmol g ^–1 。一旦暴露在阳光下，所有吸附的CO ₂都会被释放并转化为浓缩气体进行储存。有吸引力的是，由于CO ₂的红外敏感性，太阳能驱动的CO ₂释放效率远高于传统的变温方法。除了可逆性之外，温和的条件也保证了CBP的耐久性。这些发现表明，CBP 是具有成本效益的 DAC 的有希望的候选者。

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Optimizing CO2 Adsorption/Desorption via the Coupling of Imidazole and Carbon Nanotubes Paper for Spontaneous CO2 Uptake from Ambient Air and Solar-Driven Release

Direct air capture (DAC) is a sustainable technology to alleviate the greenhouse effect and a reliable pathway to acquire inexhaustible CO₂ for the production of costly chemicals and energy products. Current DAC technologies with amine-related sorbents rely on chemisorption, while they consume intensive energy for CO₂ release and sorbent regeneration by heating. Developing new DAC processes with weak, reversible adsorption can substantially reduce the regeneration energies. Herein, the design of CO₂ breathing paper (CBP) is demonstrated toward spontaneous CO₂ extraction from ambient air and solar-driven regeneration. The CBP is fabricated by coupling 2-ethyl-4-methylimidazole to carbon nanotube paper on the basis of density functional theory calculations. At ambient conditions, CBP spontaneously captures atmospheric CO₂ with a capacity of 0.14–1.75 mmol g^–1 at 0–35 °C through non-covalent electrostatic interaction. Upon exposure to sunlight, all adsorbed CO₂ can be released and converted to concentrated gas for storage. Attractively, the efficiency of solar-driven CO₂ release is much higher than the traditional temperature-swing method owing to the IR sensitivity of CO₂. Besides the reversibility, the mild conditions also ensure the durability of CBP. These findings suggest that the CBP is a promising candidate for cost-effective DAC.

更新日期：2024-04-15

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