Saadoon M. Abdulkareem, Rusul Mohamed Alsaffar, Ghassan Hassan Abdul Razzaq, Jalal Hasan Mohammed, Tabarak Mohammed Awad, Mustafa A. Alheety, Leqaa A. Mohammed, Abdulwahhab H. Mageed, Ehab M. Ali, Adil Hussein Dalaf, Sarvesh Rustagi, Suresh Ghotekar
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引用次数: 0
摘要
这项工作包括用两种方法合成 MWCNTs-CoNiFerrite 复合材料，即直接法和间接法；不过，在这两种方法中，都使用了超声作为一种环境友好型方法。使用 XRD、SEM 和 TEM 对这些复合材料进行了表征，以验证这两种方法的成分效应，这将对储氢能力产生影响。XRD 测量结果表明，在这两种情况下，碳纳米管上都形成了钴镍铁素体。此外，扫描电子显微镜（SEM）和透射电子显微镜（TEM）的测量结果证明，所制备材料的成分在形状和尺寸上都有所不同。制备的复合材料被用作固态储氢的新材料，使用了 298 和 77 K 两种不同的温度，压力范围为 0 至 900 mmHg。结果表明，直接合成和间接合成的 MWCNTs-CoNiFe2O4 在 77 K 时的氢气储存量分别达到了 1.65 和 1.12 wt%，这表明制备方法对储存气体能力的重要性。
Effect of direct and indirect in-situ sonochemical synthesis methods of MWCNTs–CoNiFerrite on the hydrogen storage
This work includes the synthesis of MWCNTs–CoNiFerrite composites in two methods, direct method and indirect method; however, in both cases, ultrasound was used as an environmentally friendly method. These composites were characterized using XRD, SEM, and TEM to verify the compositional effects of both methods, which would have effects on hydrogen storage capacity. The XRD measurements showed that, in both cases, cobalt–nickel ferrite was formed on the carbon nanotubes. Furthermore, the SEM and TEM measurements proved that the composition of the resulting materials was different in shape and size. The prepared composites were used as new materials for hydrogen storage in the solid state, using two different temperatures, 298 and 77 K, at a pressure ranging from 0 to 900 mmHg. The results showed that the H2 storage results reached 1.65 and 1.12 wt% at 77 K for both direct and indirect synthesized MWCNTs–CoNiFe2O4, respectively, which indicates the importance of the preparation method in the ability to store gases.
期刊介绍：
The primary objective of the Journal of Sol-Gel Science and Technology (JSST), the official journal of the International Sol-Gel Society, is to provide an international forum for the dissemination of scientific, technological, and general knowledge about materials processed by chemical nanotechnologies known as the "sol-gel" process. The materials of interest include gels, gel-derived glasses, ceramics in form of nano- and micro-powders, bulk, fibres, thin films and coatings as well as more recent materials such as hybrid organic-inorganic materials and composites. Such materials exhibit a wide range of optical, electronic, magnetic, chemical, environmental, and biomedical properties and functionalities. Methods for producing sol-gel-derived materials and the industrial uses of these materials are also of great interest.
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