Facile synthesis of Ru supported on WO₃ nanosheets for highly selective cellulose hydrogenolysis to ethylene glycol.

Metal–organic framework (MOFs) based composites have received more research interest for photocatalytic applications during recent years. In this work, a highly active, visible light photocatalyst BiOBr/UiO-66-NH₂ hybrid composite was successfully prepared by introducing various amounts of UiO-66-NH₂ with BiOBr through a co-precipitation method. The composites were applied for the photocatalytic degradation of RhB (rhodamine B) dye. The developed BiOBr/UiO-66-NH₂ composites exhibited higher photocatalytic activity than the pristine material. In RhB degradation experiments the hybrid composite with 15 wt% of UiO-66-NH₂ shows degradation efficiency conversion of 83% within two hours under visible light irradiation. The high photodegradation efficiency of BUN-15 could be ascribed to efficient interfacial charge transfer at the heterojunction and the synergistic effect between BiOBr/UiO-66-NH₂. In addition, an active species trapping experiment confirmed that photo-generated hole⁺ and O₂ ⁻ radicals are the major species involved in RhB degradation under visible light.

Water produced from alkaline–surfactant–polymer flooding technology is more difficult to treat than that from water flooding. In this study, a novel magnetic demulsifier, called M-5010, was synthesized through the reaction of 5010, a type of demulsifier currently used in oilfields, and epoxy group functionalized Fe₃O₄@SiO₂ microspheres. The oil removal rates and effect of the demulsifier dosage as well as the settling time were investigated. It was found that the oil removal rate of M-5010 was higher than that of 5010 under the same conditions. In addition, M-5010 can be recycled and reused by using an external magnetic field that acts as a material phase separator. Accordingly, we found that M-5010 is still effective after being reused for 5 cycles. Our results indicate that the magnetic demulsifier we fabricated can be used as an effective and recyclable material for the removal of oil from oil contaminated wastewater.