Mohammad Razaul Karim, Kazuto Hatakeyama, Takeshi Matsui, Hiroshi Takehira et al.
We measured the proton conductivity of bulk graphite oxide (GO'), a graphene oxide/proton hybrid (GO-H), and a graphene oxide (GO) nanosheet for the first time. GO is a well-known electronic insulator, but for proton conduction we observed the reverse trend, as it exhibited superionic conductivity. ...
Kazuto Hatakeyama, Mohammad Razaul Karim, Chikako Ogata, Hikaru Tateishi et al.
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. The sulphate ion increases the water absorbing capacity and hydrogen bond reformation process in GO.
Mohammad Razaul Karim, Md. Saidul Islam, Kazuto Hatakeyama, Masaaki Nakamura et al.
The effect of interlayer distance and oxygen content on proton conductivity of graphite oxide is presented. Bulk-state proton conductivities were measured using coin-shaped pellets of three different graphite oxide samples, namely, H-GO, S-GO, and B-GO, generated respectively from the techniques of ...
Mohammad Razaul Karim, Hideaki Shinoda, Mina Nakai, Kazuto Hatakeyama et al.
Abstract The rare coexistence of ferromagnetism and electrical conductivity is observed in the reduced graphene oxide–metal oxide hybrids, rGO‐Co, rGO‐Ni, and rGO‐Fe, using chemical reduction with hydrazine or ultraviolet photoirradiation of the graphene oxide–metal complexes, GO‐Co, GO‐Ni, and GO‐F...
Mohammad Razaul Karim, Kazuto Hatakeyama, Michio Koinuma, Shinya Hayami
Proton conductors are necessary in fuel cells, hydrogen separation, steam electrolysis, sensors and biological transport systems. Advances in the development of proton conductors from carbon allotropes, perovskites, ceramics and metal organic frameworks have been reviewed.
Mohammad A. Hasnat, M. Maria Rahman, S. M. Borhanuddin, Ayesha Siddiqua et al.
Md. Azharul Arafath, Farook Adam, Mohamed B. Khadeer Ahamed, Mohammad Razaul Karim et al.
Muhammad Rashed Al Mamun, Mohammad Razaul Karim, Mohammed M. Rahman, Abdullah M. Asiri et al.
Shinya Hayami, Mohammad Razaul Karim, Young Ho Lee
Abstract Long‐chain‐alkylated terpyridine cobalt(II) complexes provide an opportunity for the study not only of their unique physical properties but also of the synchronicity between spin‐state transitions and crystal–liquid‐crystal phase transitions because the thermal motion of the long alkyl chai...
Mohammad Razaul Karim, Mohammed M. Rahman, Abdullah M. Asiri, Shinya Hayami
We report multifunctionalities including the solid electrolytic property, electron conductivity (EnC), and photocatalytic water splitting (PWS) ability of organic-only hybrids obtained by intercalating short and branched-chain alkylamines including methylamine (MA), butylamine (BA), pentylamine (PA)...
Mohammad A. Hasnat, Jamil A. Safwan, Md. Shariful Islam, Zidnia Rahman et al.
Mohammad A. Hasnat, Mohammad Razaul Karim, Masato Machida
Mohammed M. Rahman, Abdul Wahid, Abdullah M. Asiri, Md. Rabiul Awual et al.
In this approach, amidol, a toxic organic chemical, is used as a staining developer electrochemically detected by using binary SnO<sub>2</sub>@Nd<sub>2</sub>O<sub>3</sub> nanocomposites (NCs) by deposition onto a flat glassy carbon electrode (GCE).
M. Maria Rahman, Nahida Akter, Mohammad Razaul Karim, N. Ahmad et al.
Dali Rani Sarker, Md. Nizam Uddin, Md. Elias, Zidnia Rahman et al.
From a sustainability standpoint, TiO2 semiconductor photocatalyst has a lot of potential in water purification. However, due to TiO2's high band gap and rapid recombination rate of electron/hole (e−/h+) pairs, visible light exposure is not practicable. To overcome these limitations, this study inve...