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首页> 外文期刊>Nanobiotechnology, IET >Facile synthesis of palladium nanocatalyst using gum kondagogu (Cochlospermum gossypium): a natural biopolymer
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Facile synthesis of palladium nanocatalyst using gum kondagogu (Cochlospermum gossypium): a natural biopolymer

机译：使用天然胶聚合物kondagogu（ Cochlospermum gossypium ）轻松合成钯纳米催化剂

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摘要

Palladium nanoparticles (Pd NPs) were synthesised by using gum kondagogu (GK), a non-toxic ecofriendly biopolymer. GK acted as both reducing and stabilising agent for the synthesis of Pd NPs. Various reaction parameters, such as concentration of gum, Pd chloride and reaction pH were standardised for the stable synthesis of GK reduced stabilised Pd NPs (GK-Pd NPs). The nanoparticles have been characterised using ultraviolet–visible spectroscopy, transmission electron microscopy and X-ray diffraction. Physical characterisation revealed that the gum synthesised Pd NPs were in the size range of 6.5 ± 2.3 nm and crystallised in face centred cubic (FCC) symmetry. Fourier transform infrared spectroscopy implicated the role of carboxyl, amine and hydroxyl groups in the synthesis. The synthesised Pd NPs were found to be highly stable in nature. The synthesised nanoparticles were found to function as an effective green catalyst ( = 0.182 min) in the reduction of 4-nitrophenol by sodium borohydride, which was evident from the colour change of bright yellow (nitrophenolate; − 400 nm) to colourless (4-AP; − 294 nm) solution. The overall objectives of the current communication were: (i) to synthesize the Pd NPs using a green reducing/capping agent; GK and (ii) to determine the catalytic performance of the synthesised Pd NPs.
机译：钯纳米颗粒（Pd NPs）是通过使用无毒的生态友好型生物聚合物konda kondagogu（GK）合成的。 GK在合成Pd NP时既充当还原剂又充当稳定剂。为稳定合成GK还原的稳定Pd NPs（GK-Pd NPs），标准化了各种反应参数，如树胶浓度，氯化钯和反应pH值。纳米粒子已经使用紫外可见光谱，透射电子显微镜和X射线衍射进行了表征。物理表征表明，口香糖合成的Pd NP的尺寸范围为6.5±2.3 nm，并以面心立方（FCC）对称性结晶。傅里叶变换红外光谱法涉及羧基，胺基和羟基在合成中的作用。发现合成的Pd NPs本质上是高度稳定的。发现合成的纳米颗粒在硼氢化钠还原4-硝基苯酚中起有效的绿色催化剂（= 0.182分钟）的作用，这从亮黄色（硝基酚盐；-400 nm）到无色（4- AP；-294 nm）溶液。当前通报的总体目标是：（i）使用绿色还原/封端剂合成Pd NPs； GK和（ii）确定合成的Pd NPs的催化性能。

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