高效吸附CO2的MgAl-LDH/高岭土复合材料的制备

IF 2.8 4区生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Journal of chemical technology and biotechnology Pub Date : 2024-12-19 DOI:10.1002/jctb.7802

Wenjie Liu, Yao Zhou, Weifeng Gong, Tongtong Tang, Yu Yang, Chao Yao, ShiXiang Zuo, Xiazhang Li

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引用次数: 0

摘要

二氧化碳排放对生活和环境的各个方面都产生了负面影响，因此开发具有高二氧化碳吸附性能的材料至关重要。结果本研究以高岭土纳米管（HNTs）为载体，采用便捷的共沉淀法制备了MgAl层状双氢氧化物（LDH），得到MgAl-LDH/HNT复合材料，并对其CO2吸附性能进行了评价。采用多种方法对复合材料的物理化学性能进行了表征。结果表明，比例为1:1的MgAl-LDH/HNT复合材料具有优异的材料结构，比表面积达到178.24 m2 g−1。在CO2吸附性能测试中，MgAl-LDH/HNT 1:1复合材料的吸附性能最好，CO2吸附量为3.91 mmol g−1。吸附过程包括物理吸附和化学吸附。动力学分析结果表明，吸附过程以物理吸附为主。该材料在循环稳定性测试中也表现出良好的性能，在6次循环后保持了94%以上的再生效率。结论MgAl-LDH/HNT材料具有良好的性能和稳定性。这为开发具有更高CO2吸附性能的新型吸附剂提供了有效的途径和方向。©2024化学工业学会（SCI）。

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Preparation of MgAl-LDH/halloysite composite materials for efficient CO2 adsorption

Background

CO₂ emissions have had negative impacts on various aspects of life and the environment, making the development of materials with high CO₂ adsorption performance crucial.

Result

In this study, halloysite nanotubes (HNTs) were used as a carrier to prepare MgAl layered double hydroxide (LDH) via a convenient coprecipitation method, resulting in MgAl-LDH/HNT composite material, which was then evaluated for its CO₂ adsorption performance. The physicochemical properties of the composite material were characterized using various methods. Results showed that the 1:1 ratio MgAl-LDH/HNT composite exhibited superior material structure, with a specific surface area reaching 178.24 m² g⁻¹. In CO₂ adsorption performance tests, the 1:1 MgAl-LDH/HNT composite showed the best adsorption performance, with a CO₂ adsorption capacity of 3.91 mmol g⁻¹. This adsorption process includes physical adsorption and chemical adsorption. Kinetic analysis results indicate that the adsorption process is mainly dominated by physical adsorption. The material also demonstrated good performance in cyclic stability tests, maintaining a regeneration efficiency of over 94% after six cycles.

Conclusion

The MgAl-LDH/HNT material has good properties and stability. This provides an effective pathway and direction for the development of new adsorbents with higher CO₂ adsorption performance. © 2024 Society of Chemical Industry (SCI).

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来源期刊

Journal of chemical technology and biotechnology 工程技术-工程：化工

CiteScore

7.00

自引率

5.90%

发文量

268

审稿时长

1.7 months

期刊介绍： Journal of Chemical Technology and Biotechnology(JCTB) is an international, inter-disciplinary peer-reviewed journal concerned with the application of scientific discoveries and advancements in chemical and biological technology that aim towards economically and environmentally sustainable industrial processes.