A simple and low-cost route to fabricate durable superhydrophobic magnetic polyurethane sponge was obtained by immersing a polyurethane sponge in a colloidal suspension of straw soot and magnetic nanoparticles. The as prepared sponge was used for separation of oil/water mixture. XRD, FT-IR, VSM, SEM and contact angle measurement analysis were used for characterization the materials. The effects of different stabilizer or surfactants (cetyltrimethylammonium bromide (CTAB), sodium dodecyl sulfate (SDS) and polyethylene glycol 6000 (PEG 6000)) on the morphology and geometrical structure of magnetic nanoparticles were investigated. For increasing the hydrophobic property of the surface, the sponge was further modified using PDMS. Results indicated that this matter can promote interfacial interactions between the sponge surface and oil. The prepared sponge showed excellent superhydrophobicity with water contact angle as high as 154°. Experiments showed that the amount of the absorbed oil was about 30 times of sponges own weight, it has our 30 times recyclability and the advantage of magnetic separation.
Pure copper chromite (CuCr 2 O 4 ) nanostructures were prepared via a new simple route. Nanostructures were synthesized by heat treatment in air at 900°C for 5 h, using powder, which was obtained by a solvent-free solidstate reaction (using ball milling) from 1:2 molar ratio of [Cu(en) 2 (H 2 O) 2 ]Cl 2 and [Cr(en) 3 ]Cl 3 Á3H 2 O as novel precursors. The effect of ball milling duration and calcination temperature on the morphology and size of copper chromite was investigated. It was found that these parameters have significant influence on the morphology and size of the CuCr 2 O 4 . The as-synthesized CuCr 2 O 4 nanostructures were characterized by means of several techniques such as X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, energy dispersive X-ray microanalysis, transmission electron microscopy and UVVis diffuse reflectance spectroscopy. Furthermore, the photocatalytic degradation of anionic dyes such as eosin Y, erythrosine and phenol red as water pollutants was performed to study the catalytic properties of as-prepared nanostructures.
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