A highly recyclable dip-catalyst produced from palladium nanoparticle-embedded bacterial cellulose and plant fibers,Green Chemistry

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A highly recyclable dip-catalyst produced from palladium nanoparticle-embedded bacterial cellulose and plant fibers
Green Chemistry ( IF 9.3 ) Pub Date : 2018-01-25 00:00:00 , DOI: 10.1039/c7gc02835k
Zhouyang Xiang _{1,

2,

3,

4} , Yong Chen _{4,

5,

6,

7} , Qingguo Liu _{4,

5,

6,

7} , Fachuang Lu _{1,

2,

3,

4,

8}

Affiliation

Bacterial cellulose (BC) with its ultrafine nano-reticular structure may provide great support and distribution to metal nanoparticles. In this study, polyethylenimine was introduced into dialdehyde BC to improve the binding stability between BC and palladium (Pd) nanoparticles. The Pd nanoparticle-embedded BC (Pd-BC) was further composited with plant fibers to fabricate a paper-like “dip-catalyst” through a paper handsheet making method. This catalyst has structural features including the fact that PEI-BC provides a great distribution and binding stability to Pd particles, while plant fibers as a supporting component may reduce the cost of fabrication, provide mechanical strength, and improve the contact between the reactants and Pd particles due to their porosity. The dip-catalyst or catalyst sheet was employed in the Suzuki–Miyaura reaction, providing a high reaction rate, a yield of nearly 100% and a high turnover frequency (TOF). It demonstrated an easy reusability and an extensive recycling capability with the same catalyst sheet being used 26 times and still having a yield of nearly 90%. This catalyst sheet produced from sustainable materials is expected to play an important role in organic synthesis.

中文翻译：

一种由钯纳米粒子包埋的细菌纤维素和植物纤维制成的高度可回收的浸渍催化剂

具有超细纳米网状结构的细菌纤维素（BC）可以为金属纳米颗粒提供强大的支撑和分布。在这项研究中，将聚乙烯亚胺引入到二醛BC中，以改善BC与钯（Pd）纳米颗粒之间的结合稳定性。通过手抄纸的制备方法，将嵌入Pd纳米颗粒的BC（Pd-BC）与植物纤维进一步复合，以制备纸状“浸入催化剂”。该催化剂具有以下结构特征：PEI-BC对Pd颗粒具有良好的分布和结合稳定性，而植物纤维作为支撑成分可以降低制造成本，提供机械强度并改善反应物与Pd之间的接触颗粒由于其多孔性。在Suzuki-Miyaura反应中使用了浸入催化剂或催化剂片，提供高反应速率，近100％的收率和高周转率（TOF）。它显示出易于重复使用的特性和广泛的循环利用能力，同一催化剂片材已使用26次，但收率仍接近90％。预期这种由可持续材料生产的催化剂片材将在有机合成中发挥重要作用。

更新日期：2018-03-06

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