光热膜的制备以及光芬顿催化性能的研究

Preparation of Photothermal Membrane and Catalytic Performance of Photo-Fenton

以刻蚀模板法制备的多孔碳纤维(CF)为载体,选取四氧化三铁(Fe_(3)O_(4))作为催化剂,将二者均匀混合并通过真空抽滤的方式制备出了具有界面加热和光芬顿催化性能的光热膜(PTM)。通过X射线衍射仪(XRD)、扫描电子显微镜(SEM)、比表面与孔隙度分析仪、紫外可见光分光光度计等对材料进行表征,研究了pH值、H_(2)O_(2)投加量和太阳光辐照密度对降解效率的影响。实验结果表明:在pH值为5、H_(2)O_(2)投加量为300μL和太阳光辐射密度为3 kW/m^(2)的条件下,反应进行80 min后,质量浓度为10 mg/L的罗丹明B(RhB)的降解率可以达到100%。此外,用PTM反复降解RhB溶液10次后,催化效率依然可以达到92%,表明此光热膜具有高的稳定性。

A carrier and a catalyst,i.e.,porous carbon fiber prepared by the etching template method and ferroferric oxide(Fe_(3)O_(4)),respectively,were uniformly mixed and vacuum-filtered to prepare a photothermal membrane(PTM)with interfacial heating and photo-Fenton catalytic properties.The material was characterized using X-ray diffractometer,scanning electron microscope,specific surface-area and porosity tester,and ultraviolet-visible spectrometer.Additionally,the effects of pH,hydrogen peroxide dosage,and solar radiation density on the degradation efficiency of the material were studied.The experimental results show that the degradation rate of RhB reached 100%after 80 min of reaction when the initial concentration of RhB was 10 mg/L,the pH value was 5,the dosage amount of H_(2)O_(2)was 300μL,and the solar radiation density was 3 kW/m^(2).The catalytic efficiency of the photothermal membrane was 92%after 10 experimental cycles,indicating the high stability of the PTM.