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Spinel phase transition metal oxide, cobalt oxide containing reactive dye wastewater aspects have important applications in the catalytic degradation. Micron or nanometer alumina due to its good chemical stability, high thermal stability, and specific surface area of ??hundreds of square meters, as catalyst carrier attentions. In this paper, using the hydrothermal method, the use of surfactant lecithin and cetyl trimethyl ammonium bromide as a template, cobalt tetroxide spherical nano-structure, alumina nanoparticles were prepared by a saturated solution impregnation - high temperature solid The method of reacting the supported catalyst synthesized cobalt tetroxide / alumina composite. Application of X-ray diffraction (XRD), field emission scanning electron microscope (FESEM), Fourier transform infrared spectroscopy (FTIR), and products were characterized by UV - visible spectroscopy (UV-vis) method. Main results are as follows: 1, lecithin surfactants, organic cobalt salt Co (Ac) 2 for the cobalt source, cosolvent ethanol, by means of ultrasonic waves and strong magnetic stirring lecithin form spherical micelles. Spherical micelles as templates, cobalt tetroxide microspheres synthesized under hydrothermal conditions. The amount of ethanol solvent, hydrothermal reaction temperature, hydrothermal reaction time, and pH on the morphology, a preliminary discussion of the formation mechanism of cobalt tetroxide microspheres. Cetyl trimethyl ammonium bromide surfactant as aluminum source, aluminum nitrate nonahydrate triethylamine as the precipitating agent, 200 ° C, 12h hydrothermal conditions first prepared carrier alumina precursor AlOOH, then 520 ° C, 3h high-temperature solid-phase reaction the carrier Al 2 O 3 . On this basis, the research supported catalyst Co 3 O 4 / Al 2 O 3 complexes on catalytic degradation of Rhodamine B, as well as loading, initial pH value of Rhodamine B and rhodamine B solution mass concentration and other factors affect its catalytic properties, and compare the performance of different metal oxide catalytic complex. The results show that: Co 3 O 4 1/3 load, rhodamine B concentration of 5mg / L, increase or decrease Rhodamine B when the initial pH of the degradation rate is the highest. However, under the same conditions, V 2 O 5 / Al 2 O 3 similar MnO 2 / Al 2 O 3 , the catalytic degradation of Rhodamine B is superior to Co 3 O 4 < / sub> / Al 2 O 3 . These results lay a good foundation for future similar catalyst.
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