02516nas a2200241   4500008004100000022001400041245017300055210006900228260011000297300001600407490000600423520150400429100002201933700002701955700002601982700003102008700002202039700002502061700002002086700001802106700002002124856013002144       2016                        eng d  a2046-206900aSunlight assisted degradation of dye molecules and reduction of toxic Cr(VI) in aqueous medium using magnetically recoverable Fe3O4/reduced graphene oxide nanocomposite0 aSunlight assisted degradation of dye molecules and reduction of   aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcJAN  a11049-110630 v63 a<p>In view of the significant impact of magnetically recoverable catalysts in photocatalytic applications, Fe3O4/reduced graphene oxide (rGO) nanocomposite photocatalyst was synthesized by adopting an eco-friendly solution chemistry approach and has been characterized by high resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy and photoluminescence (PL) spectroscopy. Fe3O4/rGO nanocomposite is efficiently utilized towards photocatalytic degradation of carcinogenic and mutagenic cationic as well as anionic dye molecules namely methyl green (MG), methyl blue (MB) and rhodamine B (RhB) under direct sunlight irradiation. The Fe3O4/rGO nanocomposite also demonstrated excellent photocatalytic reduction of aqueous Cr(VI) solution to nontoxic aqueous Cr(III) solution of more than 96% within 25 min under sunlight irradiation. Moreover, reusability of the magnetically recovered photocatalyst was studied efficiently up to 10 cycles in the degradation process. The catalyst was also characterized after the degradation of the dye molecule and the particle size of the Fe3O4 nanoparticles on the rGO sheets remained unchanged. The present investigation focuses on the importance of the use of Fe3O4/rGO nanocomposite towards photocatalytic degradation of waste water containing organic dye pollutants and toxic Cr(VI), as an easily recoverable and reusable photocatalyst with potential for many environmental remediation applications.</p>1 aBoruah, Purna, K.1 aBorthakur, Priyakshree1 aDarabdhara, Gitashree1 aKamaja, Chaitanya, Krishna1 aKarbhal, Indrapal1 aShelke, Manjusha, V.1 aPhukan, Pallabi1 aSaikia, Dulen1 aDas, Manash, R.  uhttp://library.ncl.res.in/content/sunlight-assisted-degradation-dye-molecules-and-reduction-toxic-crvi-aqueous-medium-using-002038nas a2200169   4500008004100000245018200041210006900223260000800292490000800300520131700308100002201625700002501647700002201672700002501694700002001719856012901739       2017                        eng d00aAmmonia-modified graphene sheets decorated with magnetic Fe3O4 nanoparticles for the photocatalytic and photo-Fenton degradation of phenolic compounds under sunlight irradiation0 aAmmoniamodified graphene sheets decorated with magnetic Fe3O4 na  cNOV0 v3253 aSynthesis of easily separable and eco-friendly efficient catalyst with both photocatalytic and photo-Fenton degradation properties is of great importance for environment remediation application. Herein, ammonia-modified graphene (AG) sheets decorated with Fe3O4 nanoparticles (AG/Fe3O4) as a magnetically recoverable photocatalyst by a simple in situ solution chemistry approach. First, we have functionalized graphene oxide (GO) sheets by amide functional group and then Fe3O4 nanoparticles (NPs) are doped onto the functionalized GO surface. The AG/Fe3O4 nanocomposite showed efficient photocatalytic activity towards degradation of phenol (92.43%), 2-nitrophenol (2-NP) (98%) and 2-chlorophenol (2-CP) (97.15%) within 70–120 min. Consequently, in case of photo-Fenton degradation phenomenon, 93.56% phenol, 98.76% 2-NP and 98.06% of 2-CP degradation were achieved within 50–80 min using AG/Fe3O4 nanocomposite under sunlight irradiation. The synergistic effect between amide functionalized graphene and Fe3O4 nanoparticles (NPs) enhances the photocatalytic activity by preventing the recombination rate of electron-hole-pair in Fe3O4 NPs. Furthermore, the remarkable reusability of the AG/Fe3O4 nanocomposite was observed up to ten cycles during the photocatalytic degradation of these phenolic compounds.1 aBoruah, Purna, K.1 aSharma, Bhagyasmeeta1 aKarbhal, Indrapal1 aShelke, Manjusha, V.1 aDas, Manash, R.  uhttp://library.ncl.res.in/content/ammonia-modified-graphene-sheets-decorated-magnetic-fe3o4-nanoparticles-photocatalytic-and