M
Mohammad Razaul Karim
Researcher at King Abdulaziz University
Publications - 63
Citations - 1805
Mohammad Razaul Karim is an academic researcher from King Abdulaziz University. The author has contributed to research in topics: Graphene & Oxide. The author has an hindex of 18, co-authored 60 publications receiving 1409 citations. Previous affiliations of Mohammad Razaul Karim include Tennessee State University & Kumamoto University.
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Graphene Oxide Nanosheet with High Proton Conductivity
Mohammad Razaul Karim,Kazuto Hatakeyama,Takeshi Matsui,Hiroshi Takehira,Takaaki Taniguchi,Michio Koinuma,Yasumichi Matsumoto,Tomoyuki Akutagawa,Takayoshi Nakamura,Shin Ichiro Noro,Teppei Yamada,Hiroshi Kitagawa,Shinya Hayami +12 more
TL;DR: This finding indicates the possibility of GO-based perfect two-dimensional proton-conductive materials for applications in fuel cells, sensors, and so on.
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Proton Conductivities of Graphene Oxide Nanosheets: Single, Multilayer, and Modified Nanosheets
Kazuto Hatakeyama,Mohammad Razaul Karim,Chikako Ogata,Hikaru Tateishi,Asami Funatsu,Takaaki Taniguchi,Michio Koinuma,Shinya Hayami,Yasumichi Matsumoto +8 more
TL;DR: This experiment confirmed that the epoxide groups are the major contributor to the efficient proton transport and the reported methods might be applicable to the optimization of the proton conductivity in other layered solid electrolytes.
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Optimization of proton conductivity in graphene oxide by filling sulfate ions
Kazuto Hatakeyama,Mohammad Razaul Karim,Mohammad Razaul Karim,Chikako Ogata,Hikaru Tateishi,Takaaki Taniguchi,Michio Koinuma,Shinya Hayami,Yasumichi Matsumoto +8 more
TL;DR: Graphene oxide (GO) walled channels filled by sulfate ions exhibit an optimized proton Conductivity, which is higher than the proton conductivity of all other forms of GO.
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Electrical conductivity and ferromagnetism in a reduced graphene-metal oxide hybrid
Mohammad Razaul Karim,Mohammad Razaul Karim,Hideaki Shinoda,Mina Nakai,Kazuto Hatakeyama,Hidenobu Kamihata,Takeshi Matsui,Takaaki Taniguchi,Michio Koinuma,Keita Kuroiwa,Mohamedally Kurmoo,Yasumichi Matsumoto,Shinya Hayami +12 more
TL;DR: The rare coexistence of ferromagnetism and electrical conductivity is observed in the reduced graphene oxide-metal oxide hybrids, rGO-Co, RGO-Ni, and as mentioned in this paper, using chemical reduction with hydrazine or ultraviolet photo-irradiation of the graphene oxide−metal complexes.
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Effect of Interlayer Distance and Oxygen Content on Proton Conductivity of Graphite Oxide
Mohammad Razaul Karim,Md. Saidul Islam,Kazuto Hatakeyama,Masaaki Nakamura,Ryo Ohtani,Michio Koinuma,Shinya Hayami +6 more
TL;DR: In this paper, the effect of interlayer distance and oxygen content on proton conductivity of graphite oxide is presented, and the extent of oxidation, nature of functional groups, interlayer distances, and morphologies are studied through Raman spectroscopy, XPS, powder XRD pattern, and SEM images.