Royal Society Open Science ( IF 2.9 ) Pub Date : 2020-09-30 , DOI: 10.1098/rsos.200783 Damjan Vengust 1 , Mojca Vilfan 1, 2 , Aleš Mrzel 1
High specific surface area makes carbon nanofibres suitable for catalyst support. Here we report on optimization of carbon nanofibre (CNF) growth on molybdenum carbide nanowires (MoCNW) by direct carburization of nanowire bundles. Typical CNFs obtained by this method are several hundreds of nanometres long at a diameter of 10–20 nm. We show that nanofibre growth does not depend on the initial morphology of the nanowires: nanofibres grow on individual bundles of MoCNW, on dense networks of nanowires deposited on silicon substrate, and on free-standing nanowire foils. We find that carbon nanofibres remain firmly attached to the nanowires even if they are modified into and further into nanowires. The method thus enables production of a novel hybrid material composed of nanowires densely covered with carbon nanofibres. We have additionally shown that the obtained CNFs can easily be self-decorated with platinum nanoparticles with diameters of several nanometres directly from water solution at room temperature without reducing agents. Such efficient synthesis and decoration process yield hybrid platinum/CNF/molybdenum-based NW materials, which are a promising material for a wide range of possible future applications, including sensitive sensorics and improved catalysis.
中文翻译：
碳纳米纤维在碳化钼纳米线上的生长及其贵金属纳米颗粒的自装饰
高比表面积使碳纳米纤维适合用作催化剂载体。在这里，我们报告了通过直接渗碳在碳化钼纳米线（MoCNW）上优化碳纳米纤维（CNF）的生长纳米线束。通过这种方法获得的典型 CNF 长数百纳米，直径为 10-20 nm。我们表明，纳米纤维的生长并不依赖于纳米线的初始形态：纳米纤维在单个 MoCNW 束、沉积在硅基板上的密集纳米线网络以及独立的纳米线箔上生长。我们发现碳纳米纤维仍然牢固地附着在纳米线上，即使它们被修改成并进一步深入纳米线。因此，该方法能够生产由以下成分组成的新型混合材料：纳米线密集地覆盖着碳纳米纤维。我们还表明，所获得的 CNF 可以很容易地在室温下直接从水溶液中用直径为几纳米的铂纳米颗粒进行自装饰，无需还原剂。 这种高效的合成和装饰过程产生了混合铂/CNF/钼基纳米线材料，这是一种有前景的材料，可用于广泛的未来应用，包括敏感传感和改进的催化作用。
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