Water pollution has become serious environmental problem nowadays. Advanced oxidation processes(AOP) have been widely applied in water treatment.However, traditional Fenton reaction based on Fe2﹢-H2O2 system has obvious drawbacks, which limit its applications In this study, magnetic Fe3O4core-C shell nanoparticles(Fe3O4@C NPs) were prepared for the decoloration of methylene blue(MB) via the co-precipitation followed by the hydrothermal dehydrogenation of glucose. Fe3O4@C NPs showed high catalytic activity of the decoloration of MB through the decomposition of H2O2 in Fenton-like reactions. Fe3O4@C NPs had much higher activity than bare Fe3O4 cores, suggesting the coating of carbon enhanced the catalytic activity. The performance of Fe3O4@C NPs was better at lower pH and higher temperature, but was significantly inhibited in the presence of radical scavenger tertiary butanol. Fe3O4@C NPs could be magnetic separated and regenerated, and maintained with very good catalytic activity. The implication for the applications of Fe3O4@C NP-catalyzed Fenton-like reactions in water treatment was discussed.
Graphene/polyester staple sponge(GPSS)is a high-performance adsorbent for the cleanup of crude oil spill,but the use of hydrazine hydrate as the reducing agent for the preparation of GPSS is not friendly to the environment.Herein,we reported that graphene oxide/polyester staple composite could be hydrothermally reduced by bioresource glucose to prepare GPSS of similar performance.GPSS could be applied in the absorption of oils and organic solvents thanks to its large pore volume and hydrophobicity.The absorption capacity of the novel glucose-reduced GPSS was competitive to those of the most effective absorbents for oil spill cleanup.The used GPSS could be easily regenerated by soaking in ethanol to remove the absorbed oil.The green synthesis,high oil absorption performance and easy recycling of the glucose-reduced GPSS make it a good candidate for cleaning oil spills.
Ruihan WuYitong BaiZhu MingLinyun ChenHua YangSheng-Tao YangJianbin Luo
