整体多通道Fe-Fe2O3活化H2O2降解苯酚性能研究

Performance study of Fe-Fe2O3 monolith in activation of H2O2 for phenol degradation

采用阳极氧化法成功制备出整体多通道Fe-Fe2O3,并以整体多通道Fe-Fe2O3为阴极,铂片为阳极,外加H2O2,构建非均相芬顿体系,利用电催化作用促进Fe(Ⅲ)还原为 Fe(Ⅱ).结果显示:在溶液pH为7,H2O2浓度为1.0 mmol/L,施加电压为-0.4 V的条件下,苯酚去除率在60 min内能够达到96%,这表明整体多通道Fe-Fe2O3是较理想的非均相催化剂.ICP溶出测试结果说明,电催化作用能够有效促进Fe(Ⅲ)还原为Fe(Ⅱ),从而提高催化效率.

The Fe-Fe2O3 monolith is successfully prepared by anodization method.Fe-Fe2O3 monolith and Pt sheet are employed as the cathode and anode,respectively,and H2O2 is added externally to construct the heterogeneous Fenton system.Meanwhile,the Fe(Ⅲ) is reduced to Fe(Ⅱ) by electrocatalysis.It is found that the phenol removal rate can reach 96% in 60 min under the condition in which pH is 7,H2O2 concentration is 1.0 mmol/L and applied voltage is -0.4 V.The result shows that Fe-Fe2O3 monolith is an ideal heterogeneous catalyst.The results of ICP test show that electrocatalysis can effectively promote the reduction of Fe (Ⅲ) to Fe (Ⅱ),thereby improve catalytic efficiency.