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首页> 外文期刊>Nanobiotechnology, IET >Catalytic hydrolysis of cellobiose using different acid-functionalised Fe3O4 magnetic nanoparticles
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Catalytic hydrolysis of cellobiose using different acid-functionalised Fe3O4 magnetic nanoparticles

机译：使用不同的酸官能化的Fe3O4磁性纳米粒子催化水解纤维二糖

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摘要

The present study demonstrated the preparation of three different acid-functionalised magnetic nanoparticles (MNPs) and evaluation for their catalytic efficacy in hydrolysis of cellobiose. Initially, iron oxide (Fe3O4)MNPs were synthesised, which further modified by applying silica coating (Fe3O4-MNPs@Si) and functionalised with alkylsulfonic acid (Fe3O4-MNPs@Si@AS), butylcarboxylic acid (Fe3O4-MNPs@Si@BCOOH) and sulphonic acid (Fe3O4-MNPs@Si@SO3H) groups. The Fourier transform infrared analysis confirmed the presence of above-mentioned acid functional groups on MNPs. Similarly, X-ray diffraction pattern and energy dispersive X-ray spectroscopy analysis confirmed the crystalline nature and elemental composition of MNPs, respectively. TEM micrographs showed the synthesis of spherical and polydispersed nanoparticles having diameter size in the range of 20-80 nm. Cellobiose hydrolysis was used as a model reaction to evaluate the catalytic efficacy of acid-functionalised nanoparticles. A maximum 74.8% cellobiose conversion was reported in case of Fe3O4-MNPs@Si@SO3H in first cycle of hydrolysis. Moreover, thus used acid-functionalised MNPs were magnetically separated and reused. In second cycle of hydrolysis, Fe3O4-MNPs@Si@SO3H showed 49.8% cellobiose conversion followed by Fe3O4-MNPs@Si@AS (45%) and Fe3O4-MNPs@Si@BCOOH (18.3%). However, similar pattern was reported in case of third cycle of hydrolysis. The proposed approach is considered as rapid and convenient. Moreover, reuse of acid-functionalised MNPs makes the process economically viable.
机译：本研究证明了三种不同的酸官能化磁性纳米粒子（MNPs）的制备及其对纤维二糖水解的催化效果的评估。最初，合成氧化铁（Fe3O4）MNP，然后通过应用二氧化硅涂层（Fe3O4-MNPs @ Si）进行进一步修饰，并用烷基磺酸（Fe3O4-MNPs @ Si @ AS），丁基羧酸（Fe3O4-MNPs @ Si @ BCOOH）进行官能化。 ）和磺酸（Fe3O4-MNPs @ Si @ SO3H）基团。傅里叶变换红外分析证实了在MNP上存在上述酸官能团。同样，X射线衍射图和能量色散X射线光谱分析分别证实了MNP的晶体性质和元素组成。 TEM显微照片显示了直径尺寸在20-80nm范围内的球形和多分散的纳米颗粒的合成。纤维二糖水解用作模型反应，以评估酸官能化纳米粒子的催化功效。在水解的第一个循环中，Fe3O4-MNPs @ Si @ SO3H的情况下，最大纤维二糖转化率达到74.8％。此外，将如此使用的酸官能化的MNP进行磁分离并重新使用。在水解的第二个循环中，Fe3O4-MNPs @ Si @ SO3H显示出49.8％的纤维二糖转化率，随后是Fe3O4-MNPs @ Si @ AS（45％）和Fe3O4-MNPs @ Si @ BCOOH（18.3％）。然而，据报道在第三水解周期的情况下类似的模式。所提出的方法被认为是快速且方便的。而且，酸官能化的MNP的重复使用使该方法在经济上可行。

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