Improved hydrogen adsorption of ZnO doped multi-walled carbon nanotubes |
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| Affiliation: | 1. Department of Environmental Engineering, Engineering Faculty, Karabuk University, 78050 Karabuk, Turkey;2. Mining Engineering, Engineering Faculty, Van Yuzuncu Yil University, 65080, Van, Turkey;3. Department of Energy Systems Engineering, Technology Faculty, Karabuk University, 78050, Karabuk, Turkey;1. Department of Energy Systems Engineering, Karabuk University, Karabuk, Turkey;2. Vocational School of TOBB Technical Sciences, Karabuk University, 78050 Karabuk, Turkey;1. Institute of Chemistry, Jan Długosz University, Al. Armii Krajowej 13/15, 42-200, Częstochowa, Poland;2. Department of Inorganic Chemistry, Ivan Franko Lviv National University, Kyryla I Mefodia 6, 79005, Lviv, Ukraine;1. IFISUR, Universidad Nacional del Sur, CONICET, Departamento de Química - UNS, Av. L. N. Alem 1253, B8000CPB, Bahía Blanca, Argentina;2. IFISUR, Universidad Nacional del Sur, CONICET, Departamento de Física - UNS, Av. L. N. Alem 1253, B8000CPB, Bahía Blanca, Argentina;3. Departamento de Física Teórica, Atómica y Óptica- Universidad de Valladolid, Paseo Belén 7, 47011, Valladolid, Spain;1. Physics Dept., Amirkabir University of Technology, P.O. Box 15875-4413, Tehran, Iran;2. Institute of Nanoscience and Nanotechnology, University of Kashan, Kashan, Iran;3. Physics Dept., Faculty of Science, Imam Khomeini International University, P. O. Box 34149-16818, Qazvin, Iran |
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| Abstract: | Hydrogen storage is still one of the most important problems to improve hydrogen energy usage widespread. New materials capable of storing hydrogen with high efficiency must be introduced to overcome this problem. In recent years, addition of metals or inorganic compounds to multiwalled carbon nanotubes (MWCNTs) has been generally used for hydrogen uptake studies to enhance adsorption property of the nanotubes. In this study, Zinc oxide (ZnO) nanoparticles doped MWCNTs (ZnO-MWCNTs) have been produced as new reversible hydrogen storage materials, and we have investigated characterization of ZnO-MWCNTs by XRD, SEM, TGA, TEM and BET analyses. The functionalized MWCNTs and ZnO doped MWCNTs were subjected to hydrogenation step by dynamic gas sorption analyser under pressure of 5–50 bar. The hydrogen uptake capacities of the materials under different pressures were measured gravimetrically. It was indicated that by controlling the pressures for hydrogenation of ZnO-MWCNTs induces the spillover of ZnO nanoparticles in the layer of MWCNTs which in return with high hydrogen adsorption capacity. Consequently, the hydrogen adsorption of the functionalized MWCNTs (f-MWCNTs) and the ZnO-MWCNTs were achieved to be 1.05 wt% and 2.7091 wt% under pressure of 50 bar as maximum. |
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| Keywords: | ZnO nanoparticles MWCNTs Hydrogen storage Physisorption |
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