Study on Degradation of Tetracycline Hydrochloride by TiO2/MMT Composites
In order to solve the problem of the environmental pollution caused by the discharge of antibiotic wastewater,TiO2/MMT composites were prepared by hydrolysis method with montmorillonite(MMT)as raw material,and the phase characterization of TiO2/MMT was performed by SEM,XRD,FTIR and XPS.Using tetracycline hydrochloride(TC)as the target degradation molecule,the degradation performance of the prepared composites on TC was investigated.The process of TC degradation was tracked by UV-vis spectroscopy.Phase characterization showed that TiO2 was uniformly dispersed on the surface of MMT.TiO2 in TiO2/MMT was anatase phase.We detected the presence of N element of TiO2/MMT recovery samples.The activity data showed that 30%TiO2/MMT(400℃,2 h)composite had the best photocatalytic TC degradation performance,and the degra-dation rate of 100 mg/L TC under UV light was 87.64%,which was better than that of pure TiO2(68.74%)and pure MMT(72.22%).After 6 cycles of the experiment,the catalyst still had 75%TC degradation activity,indicating that TiO2/MMT had high TC degradation activity and chemical stability.·O2-and h+ were the main active substances for TiO2/MMT photocatalytic degradation of tetracycline hydrochloride.
万方数据
