An Experimental Study On Using Titania-bearing Metallurgical Slags To Prepare Photocatalyst

To solve the problem that semiconductor photocatalyst had low rate of quantum, low utilization rate of sunlight and high preparation cost, in this pape, abandoned Titania-containing Metallurgical slag(TCMS) photocatalysts was explored as raw material to prepare photocatalyst.The influence of preparation conditions about residue particle size, slag time, aging time raw material mixing ratio and calcination temperature, etc were studied,Through the analysis text of ICP,EDS,XRD,UV-Vis,BET, etc under the optimum preparation conditions, physical, chemical and optical properties. was evaluatedThrough comparison of photocatalysts prepared by different methods,the results showed the surface area of photocatalyst prepared by three methods were surface area 18.16m2?g-1, 1.057m2?g-1, 18.17m2?g-1, the dosage of photocatalyst is 0.5g·L-1, irradiation time is 2h, the degradation rate of 25mg·L-1 Methyl orange were 93.2%, 88.0%, 97.7%. The comprehensive performance of photocatalyst prepared by Sulfuric acid dissolved at room temperature hydrothermal method was best, including the existence of good Photocatalysis TiO2 anatase crystalline phase and Fe2O3, the photocatalyst had a strong absorption on the range of 380~800nm wavelength range of visible light, it can be seen catalyst can generate strong signal of hydroxyl radical in sunlight region, 355nm, and 532nm.In order to study metallurgical slag containing titanium photocatalyst for the effect of persistent organic pollutants, 2, 4 - dichlorophenol was degraded by best conditions photocatalyst prepared by three methods. By analyzing 2, 4-dichlorophenol degradation products using FTIR, UV absorption spectra, IC HPLC and other modern detection means, the degradation mechanism of 2, 4– dichlorophenol was studied. the results showed that in the photocatalytic degradation process of the 2, 4- dichlorophenol solution, -Cl and -OH was removed from the benzene ring fiist, and some small organic molecules of intermediate products were possible to be produced, and then further degradated.