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用于 CO 光催化还原为清洁燃料的 CNTs/Fe-BTC 复合材料：批量和连续体系。

CNTs/Fe-BTC Composite Materials for the CO-Photocatalytic Reduction to Clean Fuels: Batch and Continuous System.

机构信息

Área de Ingeniería Química, Departamento de Ingeniería de Procesos e Hidráulica, Universidad Autónoma Metropolitana-Iztapalapa, Mexico City 09340, Mexico.

Laboratorio de Catálisis y Materiales, ESIQIE-Instituto Politécnico Nacional Zacatenco, Mexico City 07738, Mexico.

出版信息

Molecules. 2023 Jun 13;28(12):4738. doi: 10.3390/molecules28124738.

DOI:10.3390/molecules28124738
PMID:37375292
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10304569/
Abstract

CNTs/Fe-BTC composite materials were synthesized with the one-step solvothermal method. MWCNTs and SWCNTs were incorporated in situ during synthesis. The composite materials were characterized by different analytical techniques and used in the CO-photocatalytic reduction to value-added products and clean fuels. In the incorporation of CNTs into Fe-BTC, better physical-chemical and optical properties were observed compared to Fe-BTC pristine. SEM images showed that CNTs were incorporated into the porous structure of Fe-BTC, indicating the synergy between them. Fe-BTC pristine showed to be selective to ethanol and methanol; although, it was more selective to ethanol. However, the incorporation of small amounts of CNTs into Fe-BTC not only showed higher production rates but changes in the selectivity compared with the Fe-BTC pristine were also observed. It is important to mention that the incorporation of CNTs into MOF Fe-BTC allowed for increasing the mobility of electrons, decreasing the recombination of charge carriers (electron/hole), and increasing the photocatalytic activity. In both reaction systems (batch and continuous), composite materials showed to be selective towards methanol and ethanol; however, in the continuous system, lower production rates were observed due to the decrease in the residence time compared to the batch system. Therefore, these composite materials are very promising systems to convert CO to clean fuels that could replace fossil fuels soon.

摘要

采用一步溶剂热法合成 CNTs/Fe-BTC 复合材料。MWCNTs 和 SWCNTs 在合成过程中被原位掺入。采用多种分析技术对复合材料进行了表征，并将其用于 CO 光催化还原为附加值产品和清洁燃料。在将 CNTs 掺入 Fe-BTC 中时，与原始的 Fe-BTC 相比，观察到更好的物理化学和光学性能。SEM 图像表明 CNTs 被掺入 Fe-BTC 的多孔结构中，表明它们之间存在协同作用。原始的 Fe-BTC 对乙醇和甲醇具有选择性；然而，它对乙醇的选择性更高。然而，将少量 CNTs 掺入 Fe-BTC 中不仅显示出更高的产率，而且与原始的 Fe-BTC 相比，选择性也发生了变化。值得一提的是，将 CNTs 掺入 MOF Fe-BTC 中允许增加电子的迁移率，减少载流子（电子/空穴）的复合，并提高光催化活性。在这两个反应体系（间歇式和连续式）中，复合材料对甲醇和乙醇均具有选择性；然而，在连续式体系中，由于与间歇式体系相比，停留时间的减少，观察到较低的产率。因此，这些复合材料是将 CO 转化为清洁燃料的很有前途的体系，这些清洁燃料可能很快就能替代化石燃料。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/74de/10304569/fcc7aa1ed99e/molecules-28-04738-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/74de/10304569/fd428a311f04/molecules-28-04738-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/74de/10304569/7202267e0114/molecules-28-04738-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/74de/10304569/522c5740e0ed/molecules-28-04738-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/74de/10304569/65a65922f490/molecules-28-04738-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/74de/10304569/9c99528711f1/molecules-28-04738-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/74de/10304569/c5e28afa8d79/molecules-28-04738-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/74de/10304569/31163b08f3f0/molecules-28-04738-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/74de/10304569/fcc7aa1ed99e/molecules-28-04738-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/74de/10304569/fd428a311f04/molecules-28-04738-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/74de/10304569/7202267e0114/molecules-28-04738-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/74de/10304569/522c5740e0ed/molecules-28-04738-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/74de/10304569/65a65922f490/molecules-28-04738-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/74de/10304569/9c99528711f1/molecules-28-04738-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/74de/10304569/c5e28afa8d79/molecules-28-04738-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/74de/10304569/31163b08f3f0/molecules-28-04738-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/74de/10304569/fcc7aa1ed99e/molecules-28-04738-g008.jpg

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