Treatment of phenol containing industrial wastewater by noble metal supported TiO2 photocatalysis
In this paper,pure TiO2 was prepared by sol-gel method with butyl titanate as precursor,and Ag/TiO2 with different mass fractions were prepared by solution standing method.The phase structure and morphology of the catalyst were characterized by XRD and TEM.Using phenol as a simulated pollutant,the loading amount of Ag,light intensity,initial concentration of phenol,and catalyst reusability were studied.The experimental results showed that the catalytic degradation effect was best when the Ag loading amount was 2％,the light intensity was 400W,and the phenol concentration in the wastewater sample was less than 400mg·L-1.Moreover,the catalytic activity of the catalyst remained at a high level after 8 cycles of reuse.TEM and XRD characterization analysis found that TiO2 catalyst was successfully synthesized,and Ag nanoparticles were evenly dispersed on the surface of TiO2.
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