Synthesis,Characterization Of AgBr Composite Photocatalysts And Their Application In Removing The Typical Pollutants From Water

The increasing deterioration of the environment has become a concern.Wastewater discharge has seriously affected the human health.Solar energy is a best one of the most effective ways to be used to solve the energy depletion and environmental problems because it is an almost inexhaustible clean energy.It is a economic and effective technology that photocatalytic technology has attract almost all of the researchers domestic and overseas.In this paper,MCM41 was used as a carrier,Cr,TiO2 and AgBr loaded in the surface,we get the target catalyst AgBr-TiO2-Cr-MCM41.Then Cs2.5H0.5PW12O40was used as a carrier,AgBr loaded in the surface,we get the target catalyst AgBr-Cs2.5H0.5PW12O40.Using AR18,Cr(?)and phenol as degradation agent,we studied some of factors.The experimental result as hereunder mentioned:(1)Using the method of hydrothermal synthesis of metal chromium doped MCM41,then loaded TiO2 by hydrolysis of butyl titanate,at the last,by the chemical precipitation-deposition method to compose the final catalyst.A series of characterization methods were used in this paper,XRD and BET indicate that the new catalyst maintain the pore structure well.UV-Vis indicate that the new catalyst has a wider range of the light response.The catalytic activity test indicate that AgBr-TiO2-Cr-MCM41 has a well catalytic performance than TiO2-Cr-MCM41.The experiment of free radical inhibition indicate that ·O2-is the leading active substance.(2)By the simple method of chemical precipitation-deposition,we get the catalyst AgBr-Cs2.5H0.5PW12O40,A series of characterization methods were used in this paper,besides,the AR18 is used as degradation agent,some important influence factors about the performance of catalyst were discussed,then we discussed the influence factors and active substance.(3)Alter the target degradation substance,the catalytic AgBr-Cs2.5H0.5PW12O40 was used to degrade the pollutant Cr(?)and phenol,they both co-treating.We change the amount of Cr(?)and phenol to research the reaction rate.The result indicate that acid solution promote the degradation of Cr(?)and the alkaline solution promote the degradation of phenol.