02142nas a2200265   4500008004100000245013900041210006900180260000800249300001200257490000800269520122400277100002101501700001401522700002001536700002201556700001901578700002301597700002401620700002101644700001701665700002301682700001901705700002201724856013001746       2017                        eng d00aMagnetic reduced graphene oxide loaded hydrogels: highly versatile and efficient adsorbents for dyes and selective Cr(VI) ions removal0 aMagnetic reduced graphene oxide loaded hydrogels highly versatil  cDEC  a360-3690 v5073 aThe formation of composites of reduced graphene oxide (rGO) and magnetic nanoparticles (MP) has flourished in recent years as they combine the advantages of both nanomaterials. Most of these composite materials are prepared by in situ formation of MP onto rGO or by the post-adsorption onto rGO. We report here on a simple and highly controlled method for the fabrication of different magnetic 3D rGO-loaded hydrogels. Cellulose bound magnetic nanoparticles (MP@cellulose) were synthesized by chemical co-precipitation and loaded together with rGO into poly(ethylene glycol) dimethacrylate based hydrogels during their fabrication using photo-polymerization. The magnetic rGO-loaded hydrogels proved to be highly adaptable to different applications. The as-formed composites allowed for efficient dye removal with an adsorption capacity of 111.9 +/- 4 mg g(-1) in the case of methylene blue (MB). Integration of poly(ethyleneimine) (PEI) allowed for the selective capturing of Cr6+ ions with an adsorption capacity of 313 12 mg g-1. Most importantly, independent of the application, the magnetic rGO-loaded hydrogel can be regenerated without loss of its adsorption capacity. (C) 2017 Elsevier Inc. All rights reserved.1 aHalouane, Fatima1 aOz, Yavuz1 aMeziane, Dalila1 aBarras, Alexandre1 aJuraszek, Jean1 aSingh, Santosh, K.1 aKurungot, Sreekumar1 aShaw, Pankaj, K.1 aSanyal, Rana1 aBoukherroub, Rabah1 aSanyal, Amitav1 aSzunerits, Sabine  uhttps://library.ncl.res.in/content/magnetic-reduced-graphene-oxide-loaded-hydrogels-highly-versatile-and-efficient-adsorbents01952nas a2200217   4500008004100000022001300041245013000054210007300184260000800257300001400265490000700279520113300286100002301419700002601442700002301468700002101491700002401512700002701536700002501563856014601588       2018                        eng d  a1434194800aSubstituent‐induced deformed ni–porphyrin as an electrocatalyst for the electrochemical conversion of water into dioxygen0 aSubstituent‐induced deformed ni–porphyrin as an electrocatalyst   cAPR  a1549-15550 v143 a<p>The electrochemical water oxidation ability of complexes 5,15‐diphenylporphinatonickel(II) (A) and 5,15‐bis(3,5‐di‐tert‐butylphenyl)porphinatonickel(II) (B) in the oxygen evolution reaction (OER) have been investigated in an alkaline medium. Complex B was found to be kinetically and thermodynamically more active than complex A. The overpotential and Tafel slope of complex B are lower than those of complex A by 30 mV and around 45 mV/decade, respectively, which supports the higher activity of B. Moreover, stability tests endorse the sustainability of both samples under alkaline conditions. It has been found that the 3,5‐di‐tert‐butylphenyl substituent in B plays a decisive role in achieving a better OER onset potential and current than that obtained with A, which is a result of the modulation of the structural parameters of B. Furthermore, the measured OER activities of A and B have been correlated with their molecular arrangement as well as differences in their bonding characteristics and dipole moments. For further insight, the obtained results have been confirmed by a theoretical study.</p>1 aKrishna, J., V. S.1 aKrishna, Narra, Vamsi1 aSingh, Santosh, K.1 aShaw, Pankaj, K.1 aDhavale, Vishal, M.1 aVardhaman, Anil, Kumar1 aGiribabu, Lingamallu  uhttps://library.ncl.res.in/content/substituent%E2%80%90induced-deformed-ni%E2%80%93porphyrin-electrocatalyst-electrochemical-conversion-water