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采用超临界发泡和浸渍法制备具有形态和尺寸可变性的微孔聚合物稳定金属纳米复合材料用于催化氢化。

Fabrication of a form- and size-variable microcellular-polymer-stabilized metal nanocomposite using supercritical foaming and impregnation for catalytic hydrogenation.

机构信息

Department of Chemistry, National DongHwa University, Shoufeng, Hualien, 97401, Taiwan.

出版信息

Nanoscale Res Lett. 2012 May 31;7(1):283. doi: 10.1186/1556-276X-7-283.

DOI:10.1186/1556-276X-7-283
PMID:22651135
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC3422202/
Abstract

This article presents the fabrication of size-controllable and shape-flexible microcellular high-density polyethylene-stabilized palladium nanoparticles (Pd/m-HDPE) using supercritical foaming, followed by supercritical impregnation. These nanomaterials are investigated for use as heterogeneous hydrogenation catalysts of biphenyls in supercritical carbon dioxide with no significant surface and inner mass transfer resistance. The morphology of the Pd/m-HDPE is examined using scanning electron microscopy images of the pores inside Pd/m-HDPE catalysts and transmission electron microscopy images of the Pd particles confined in an HDPE structure. This nanocomposite simplifies industrial design and operation. These Pd/m-HDPE catalysts can be recycled easily and reused without complex recovery and cleaning procedures.

摘要

本文提出了一种使用超临界发泡和超临界浸渍制备具有可控尺寸和灵活形状的微孔高密度聚乙烯稳定钯纳米粒子（Pd/m-HDPE）的方法。这些纳米材料被用作超临界二氧化碳中联苯的非均相加氢催化剂，没有明显的表面和内扩散阻力。通过扫描电子显微镜观察 Pd/m-HDPE 催化剂内部孔的形貌和透射电子显微镜观察 Pd 粒子在 HDPE 结构中的受限形貌，研究了 Pd/m-HDPE 的形态。这种纳米复合材料简化了工业设计和操作。这些 Pd/m-HDPE 催化剂可以很容易地回收和再利用，而无需复杂的回收和清洁程序。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/42bd/3422202/72f82b866542/1556-276X-7-283-4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/42bd/3422202/ffc469eab45c/1556-276X-7-283-1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/42bd/3422202/45e6b3b97527/1556-276X-7-283-2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/42bd/3422202/8c3f564051cf/1556-276X-7-283-3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/42bd/3422202/72f82b866542/1556-276X-7-283-4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/42bd/3422202/ffc469eab45c/1556-276X-7-283-1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/42bd/3422202/45e6b3b97527/1556-276X-7-283-2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/42bd/3422202/8c3f564051cf/1556-276X-7-283-3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/42bd/3422202/72f82b866542/1556-276X-7-283-4.jpg

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本文引用的文献

1
Kinetic study of hydrodechlorination of chlorobiphenyl with polymer-stabilized palladium nanoparticles in supercritical carbon dioxide.超临界二氧化碳中聚合物稳定钯纳米粒子催化氯代联苯加氢脱氯的动力学研究
J Phys Chem A. 2009 Sep 10;113(36):9772-8. doi: 10.1021/jp9008459.
2
Destruction of pentachlorobiphenyl in soil by supercritical CO(2) extraction coupled with polymer-stabilized palladium nanoparticles.超临界二氧化碳萃取结合聚合物稳定钯纳米颗粒对土壤中五氯联苯的降解
Chemosphere. 2009 May;75(5):629-633. doi: 10.1016/j.chemosphere.2009.01.018. Epub 2009 Feb 10.
3
Catalytic hydrogenation of polyaromatic hydrocarbon (PAH) compounds in supercritical carbon dioxide over supported palladium.
负载型钯催化剂在超临界二氧化碳中对多环芳烃（PAH）化合物的催化氢化反应
J Environ Monit. 2007 Dec;9(12):1344-51. doi: 10.1039/b715318j. Epub 2007 Oct 23.
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Supercritical Fluids in Heterogeneous Catalysis.多相催化中的超临界流体
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