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Adhikari, Amrita De,Oraon, Ramesh,Tiwari, Santosh Kumar,Saren, Pupulata,Lee, Joong Hee,Kim, Nam Hoon,Nayak, Ganesh Chandra American Chemical Society 2018 INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH - Vol.57 No.5
<P>CoFe<SUB>2</SUB>O<SUB>4</SUB> nanospheres ornamented CdS nanorods were successfully assembled over the reduced graphene oxide nanosheets. Such hierarchical morphology established by field emission scanning electron microscopy and transmission electron microscopy studies, with high surface area offered a high specific capacitance of 1487 F g<SUP>–1</SUP> at a current density of 5 A g<SUP>–1</SUP> owing to fast diffusion of ions, facile transportation of electrons, and great synergism between the components, which led to reversible redox reactions. Furthermore, the electrode material has specific capacitance retention of 78% up to 5000 cycles, thus demonstrating its good reversibility and cyclic stability. The resulting CdS-CoFe<SUB>2</SUB>O<SUB>4</SUB>@reduced graphene oxide nanohybrid can deliver excellent electrochemical performance and can be a potential candidate for supercapacitor application.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/iecred/2018/iecred.2018.57.issue-5/acs.iecr.7b04885/production/images/medium/ie-2017-04885n_0010.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ie7b04885'>ACS Electronic Supporting Info</A></P>
Santosh Kr. Tiwari,Goutam Hatui,Ramesh Oraon,Amrita De Adhikari,Ganesh Chandra Nayak 한국물리학회 2017 Current Applied Physics Vol.17 No.9
Herein, we report an efficient approach for the fabrication of polymer blend nanocomposites with welldispersed graphene oxide in polycarbonate (PC)/poly methyl methacrylate (PMMA) through melt compounding under the controlled temperature and pressure. Graphene oxide was synthesized by Improved Hummer's method and consequently dispersed in PC and PMMA through different mixing sequences to access their dispersion in the blend nanocomposites. Thermo-mechanical investigations indicate ~119.4% increase in tensile strength, ~64.87% increase in the Young's modulus and ~16.3% increase in glass transition value for the sample prepared by mixing GO first with PMMA and then with PC, in comparison to neat blend. This reinforcement in thermo-mechanical properties of sample prepared by mixing GO first with PMMA and then with PC, on incorporation of 1% of graphene oxide (by weight) is due to the effective interfacial adhesion and uniform load transfer at the interfaces of polymer blend nanocomposites. Furthermore, Thermogravimetric analysis showed a remarkable decrease in weight loss at elevated temperature for the nanocomposites, which confirms the role of graphene oxide on thermal stability of PNCs. The fabricated blend nanocomposites are ecofriendly, cost effective and can be used for various industrial applications where elevated temperature is required.