Fabrication of nanofibrous vinyl brushes of clay minerals as an active support for gold nanoparticles for catalytic reduction

IF 2.1 4区工程技术 Q3 CHEMISTRY, INORGANIC & NUCLEAR

Gold Bulletin Pub Date : 2023-06-23 DOI:10.1007/s13404-023-00328-0

Talha Baig, Shaista Taimur, Afza Shahid

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Abstract

This study encompasses the synthesis of gold nanoparticles (GNPs) captured on nanofibrous vinyl brushes (NVBs) using sepiolite nanoclay as a matrix. The diameter of GNPs was found to be 2–8 nm investigated by a particle-size analyzer. Due to the high surface reactivity, GNPs are more susceptible to agglomeration which reduces their efficacy as catalyst. A suitable support could be employed to arrest the discrete gold particles on its surface. The distinct textural morphology of sepiolite allows it to be a promising choice as support. Silanol groups on the surface of sepiolite nanofibers were consumed to graft vinyl brushes using hydrolyzed vinyl triethoxy silane. This grafting was characterized by FT-IR spectroscopy. Morphological studies of developed nanocomposites (AuNVBs) were conducted by TEM and FESEM revealing evidently the incorporation of well-distributed GNPs. XRD diffractograms have validated the connectivity of GNPs on NVBs surface. GNPs immobilized on the surface of NVBs are commendable candidates as catalyst to enhance the reaction rate for the conversion of 4- nitrophenol to 4- aminophenol.

Graphical abstract

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粘土矿物纳米纤维乙烯基刷的制备作为催化还原金纳米颗粒的活性载体

这项研究包括使用海泡石纳米粘土作为基质合成在纳米纤维乙烯基刷（NVBs）上捕获的金纳米颗粒（GNPs）。粒度分析仪研究发现GNP的直径为2–8 nm。由于高表面反应性，GNP更容易结块，这降低了它们作为催化剂的功效。可以使用合适的载体来将离散的金颗粒捕获在其表面上。海泡石独特的结构形态使其成为一种很有前途的载体选择。利用水解乙烯基三乙氧基硅烷，消耗海泡石纳米纤维表面的硅烷醇基团接枝乙烯基刷。通过FT-IR光谱对该接枝进行了表征。通过TEM和FESEM对所开发的纳米复合材料（AuNVBs）进行了形态研究，明显揭示了分布良好的GNPs的掺入。XRD衍射图验证了GNP在NVBs表面的连接性。固定在NVBs表面的GNPs是值得称赞的候选催化剂，可以提高4-硝基苯酚转化为4-氨基苯酚的反应速率。图形摘要

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来源期刊

Gold Bulletin Chemistry-Inorganic Chemistry

CiteScore

3.70

自引率

4.50%

发文量

期刊介绍： Gold Bulletin is the premier international peer reviewed journal on the latest science, technology and applications of gold. It includes papers on the latest research advances, state-of-the-art reviews, conference reports, book reviews and highlights of patents and scientific literature. Gold Bulletin does not publish manuscripts covering the snthesis of Gold nanoparticles in the presence of plant extracts or other nature-derived extracts. Gold Bulletin has been published over 40 years as a multidisciplinary journal read by chemists, physicists, engineers, metallurgists, materials scientists, biotechnologists, surface scientists, and nanotechnologists amongst others, both within industry and academia. Gold Bulletin is published in Association with the World Gold Council.