钛合金表面铁氧化物膜层类Fenton催化剂制备及降解苯酚性能

发布时间：2018-05-06 15:29

  本文选题：铁氧化膜层 + 类Fenton催化剂　； 参考：《无机化学学报》2017年10期

【摘要】：采用微弧氧化法在硅酸盐电解液体系中于钛合金表面成功制备了铁氧化物膜层类Fenton催化剂。采用SEM、XRD以及XPS对所得膜层的表面形貌、晶体结构及物相组成进行表征,发现膜层中含有金红石相TiO_2(R-TiO_2),和非晶态的铁氧化物Fe_3O_4;对膜层的表面形貌分析发现电解液中加入铁氰化钾后表面粗糙度及平均孔尺寸增大。以苯酚作为目标降解物,研究了膜层类Fenton催化活性,同时研究了铁源含量、苯酚浓度、H_2O_2投料量以及pH值对膜层降解苯酚效率的影响,优化了降解条件,研究发现在pH 3.0、温度30℃、H_2O_26.0 mmol·L~(-1)、苯酚35 mg·L~(-1)及铁氰化钾含量10 g·L~(-1)的条件下降解90 min,苯酚降解效率可达90%。通过对不同温度下降解苯酚的反应动力学研究,利用阿伦尼乌斯方程得到了该膜层类Fenton降解苯酚的反应活化能Ea为96.9 kJ·mol~(-1)。最后,评价了膜层的稳定性并分析了稳定性衰减的原因。
[Abstract]:Fe oxide film Fenton catalyst was successfully prepared on the surface of titanium alloy by microarc oxidation in silicate electrolyte system. The surface morphology, crystal structure and phase composition of the film were characterized by SEM and XPS. It is found that there are rutile phase tio _ 2o _ 2 and amorphous iron oxide Fe _ 3O _ 4 in the film layer, and the surface roughness and average pore size increase with the addition of potassium ferricyanide into the electrolyte. The catalytic activity of membrane Fenton was studied with phenol as the target degradation material. At the same time, the effects of the content of Tie Yuan, the amount of H _ 2O _ 2 and pH value on the degradation efficiency of the film were studied, and the degradation conditions were optimized. It was found that the degradation efficiency of phenol could reach 90 min under pH 3.0, temperature 30 鈩，

本文编号：1852855