Magnesium hydroxide/reduced graphene oxide [MG(OH)2/RGO] nanocomposites were prepared by the chemical precipitation method with magnesium chloride hexahydrate,sodium hydroxide,and graphene oxide (GO) as raw materials and caprolactam as a solvent.The influences of the reaction time and the amount of GO on the performance of the nanocomposites were investigated.The results showed that GO in nanocomposites was in situ reduced,and Mg(OH)2 nanosheets were loaded on the surface of RGO.All Mg(OH)2/RGO exhibited excellent photocatalytic degradation for methylene blue(MB),which could be completely degraded within 5min.This was due to the synergistic effect of Mg(OH)2 nanosheets and RGO on the photocatalytic degradation of MB.The Mg(OH)2 nanosheets with large specific surface areas showed good adsorption of MB,and meanwhile,the Mg(OH)2 nanosheets loaded on the surface of RGO could guarantee the photocatalytic effect of RGO.Besides,the reaction time had little effect on the photocatalytic performance,but with an increase of the GO content,the reusability of nanocomposites was significantly improved.
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