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首页> 外文期刊>Nanobiotechnology, IET >Biosynthesis of eco-friendly and recyclable Pd/LDHs catalyst using the withered leaves extract for Suzuki coupling reaction
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Biosynthesis of eco-friendly and recyclable Pd/LDHs catalyst using the withered leaves extract for Suzuki coupling reaction

机译：枯叶提取物用于铃木偶联反应生物合成环保可回收的Pd / LDHs催化剂

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摘要

The hydrotalcite-supported palladium (Pd) catalyst is prepared with a green and environmentally friendly route, introducing the extract of withered leaves as a dispersant and reducing agent (Pd/LDHs-B). Compared with the as-prepared catalyst (Pd/LDHs-P with the average diameter of 4.3 nm) using a chemical synthesis method with polyvinylpyrrolidone as a dispersant and ascorbic acid (Vc) as a reductant, the results indicate that the size of Pd nanoparticles in Pd/LDHs-B is smaller (ca. 3.6 nm). The Pd-LHDs-B (0.5 mmol parts per thousand) exhibits higher activity (98.66%) than Pd/LDHs-P (98.19%) in the Suzuki reaction of 4-bromotoluene and phenylboronic acid at 60 degrees C for 30 min. Also, the reusability of Pd/LDHs-B is confirmed by recycling tests without a significant decrease in activity.
机译：水滑石负载的钯（Pd）催化剂采用绿色环保的方法制备，引入了枯萎叶的提取物作为分散剂和还原剂（Pd / LDHs-B）。与使用聚乙烯吡咯烷酮作为分散剂和抗坏血酸（Vc）作为还原剂的化学合成方法制备的催化剂（Pd / LDHs-P平均直径为4.3 nm）相比，结果表明Pd纳米颗粒的尺寸Pd / LDHs-B中的λ较小（约3.6 nm）在4-溴甲苯和苯硼酸在60摄氏度下进行30分钟的Suzuki反应中，Pd-LHDs-B（0.5 mmol / 1000）比Pd / LDHs-P（98.19％）具有更高的活性（98.66％）。同样，Pd / LDHs-B的可重复使用性通过回收测试得到了证实，而活性没有明显降低。

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