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首页> 外文期刊>Current Graphene Science >Preliminary Study on the Quick Synthesis of Manganese Oxide-redu ced Graphene Oxide Nano-hybrids and their Magnetic Properties | Bentham Science
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Preliminary Study on the Quick Synthesis of Manganese Oxide-redu ced Graphene Oxide Nano-hybrids and their Magnetic Properties | Bentham Science

机译：氧化锰还原的氧化石墨烯纳米杂化物的快速合成及其磁性的初步研究边沁科学

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Background: Various studies have been carried out on MnOx supported on high-surfacearea nano-carbon based supports like CNTs and graphene. Most methods reported in literature uselengthy procedures involving multiple steps to grow MnOx nanostructures on reduced graphene oxide.Moreover, most methods using ultrasonication or electrochemical deposition of MnOx use KMnO4 asthe precursor, which invariably leads to K impurities.Objective: Manganese oxide and partially reduced graphene oxide (MnOx-PRGO) nano-hybrids wereprepared using a one step wet chemical process to study their magnetic properties.Method and Results: A simple wet chemical method via a combination of microwave and sonicationprocesses was utilized to prepare MnOx-PRGO nano-hybrids with different MnOx loadings. The combinationof the two processes allowed control over minimising the residual K impurities in such systems.The as-prepared MnOx-PRGO nano-hybrids were extensively characterised using transmissionelectron microscopy, Fourier transform-Infra-red spectroscopy, thermo-gravimetric analysis and X-rayphotoelectron spectroscopy.Conclusion: The MnOx-PRGO nano-hybrids responded to magnetic fields at room temperature, whichwas dependant on the MnOx loading. The system showed some ferromagnetic behaviour at low appliedmagnetic fields with Hc = 127.5 Oe and remanant magnetisation of 0.076 emu/g. The Neel temperaturewas found to be 9 K. The hybrid system showed paramagnetic behaviour with a near linear 1/χversus Tplot.
机译：背景：已经对高表面积纳米碳基载体（如CNT和石墨烯）上负载的MnOx进行了各种研究。文献中报道的大多数方法都使用冗长的过程，包括在还原的氧化石墨烯上生长MnOx纳米结构的步骤。此外，大多数使用超声或电化学沉积MnOx的方法都使用KMnO4作为前体，这必然会导致K杂质。采用一步湿法制备氧化锰（MnOx-PRGO）纳米杂化物，研究其磁性能。不同的MnOx负载。两种方法的结合使得可以控制这些系统中残留的K杂质。利用透射电子显微镜，傅里叶变换红外光谱，热重分析和X射线光电子技术对所制备的MnOx-PRGO纳米杂化物进行了广泛表征。结论：MnOx-PRGO纳米杂化物对室温下的磁场有反应，这取决于MnOx的负载量。该系统在低磁场（Hc = 127.5 Oe）和剩余磁化强度为0.076 emu / g时显示出一些铁磁行为。发现Neel温度为9K。混合系统显示顺磁性行为，线性T / p与T / plot接近。

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