Preparation Of Iron And Its Oxide Nanocomposites For The Degradation Of Organic Dyes At Room Temperature

As the essential substance to human daily life, water is also very valuable nature resources, and act as the irreplaceable role in industry, agriculture and social development. However, with the rapid development of global industrialization and the growth of population, a great number of diffusion of pollutants in surface water and groundwater has become a major world problem, especially the emission of industrial dye water. In the effort to solve the problem of water pollution, wastewater treatment has made great progress, some physical, chemical and biological methods have been widely used, including adsorption, photocatalytic oxidation, chemical catalytic oxidation, electrochemical and biological degration etc. Adsorption-Fenton and Fenton, which were used in this experiment are effective treatment. However, there are also some disadvantages, such as low efficiency of recovery and utilization, poor recycling performance and inferior stability.In this paper,the preparation of several noval nanomaterials with Na BH4 reduction at room temperature improves the weakness of traditional method in a certain extent. In addition, combined with the existing means of characterization,we carried out a systematic studies on the morp Hology, structure and also the performance and mechanism. Based on the experimental researches, the main contents are as follows:The chain-like Fe nanoparticles were prepared by Na BH4 reduction at room temperature. In order to contrast, we also prepared Fe3O4 and Fe/Fe3O4, and studied the adsorption performance for degradation of dyes,We chose orange II(OR II)as the model organic dyes. By the means of XRD, to determine its composition. With FESEM, its morphology can be observed. By UV-Vis test, we can obtain its adsorption performance, deter mine the maximum adsorption quantity and study the adsorption mechanism. After adsorption, stripping-cleaning-dry, we used the sample as the Photo-Fenton catalysts, and test the Fenton performance by UV-Vis. In order to test the stability, we carried out six circular Photo-Fenton degradation of OR II experiments.We prepared Fe3O4-r GO nanostructure composite materials of different concentrations of GO by Na BH4 at room temperature and studied their p Hotocatalytic performance. With the help of XRD and FT-IR, we determined their compositions, in the means of Roman analysis, we further proved whether the GO was reducted to r GO. The results of XPS analysis further supported the type of iron oxide in the compound. With FESEM, we can observe and compare the morp Hology of the patterns of different concentration of GO. After that, we carried out Photo-Fenton degredation OR II experiment to value the performance of different patterns and deter mine the optimal concentration of GO.