Preparation and Characterization of a Porous Structure PbO2-ZrO2 Nanocomposite Electrode and Its Application in Electrocatalytic Degradation of Crystal Violet
Preparation and Characterization of a Porous Structure PbO2-ZrO2 Nanocomposite Electrode and Its Application in Electrocatalytic Degradation of Crystal Violet
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多孔结构PbO2-ZrO2纳米复合电极的制备、表征及其在电催化降解结晶紫中的应用
DOI：
10.1149/2.0161713jes
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发表时间：
2017-09
影响因子：
3.9
通讯作者：
Huailiang Feng
中科院分区：
文献类型：
--
作者：
Yingwu Yao;Chunjiao Huang;Xin Chen;Feng Wei;Huailiang Feng
采用气泡模板复合电沉积法首次成功制备了新型多孔PbO - zro - 2纳米复合电极。扫描电镜（SEM）和x射线衍射（XRD）结果表明，新型多孔PbO - 2- zro - 2纳米复合电极具有三维多孔结构，晶体尺寸小于平面PbO - 2- zro - 2纳米复合电极。在电极上可以观察到氧化锆纳米颗粒。循环伏安法测定表明，多孔PbO - 2- zro - 2纳米复合电极的电化学活性表面积是平面PbO - 2- zro - 2电极的3倍。在结晶紫电催化氧化过程中，90 min后多孔复合电极的去色效率为99.8%，COD去除率为69.2%。降解过程遵循准一级动力学。多孔复合电极的速率常数可达0.04916 min−1，是平面复合电极（0.01188 min−1）的4.5倍。此外，三维多孔结构可以增强羟基自由基的生成能力。实验结果表明，多孔PbO - zro - 2纳米复合电极在污染物降解领域具有很大的应用潜力。
A novel porous PbO 2-ZrO 2 nanocomposite electrode was successfully prepared by bubbles template composite electrodeposition methods for the first time. Scanning electronic microscopy (SEM) and X-ray diffraction (XRD) results show that the novel porous PbO 2-ZrO 2 nanocomposite electrodes have the three-dimensional porous structure and smaller crystal sizes than planar PbO 2-ZrO 2 nanocomposite electrodes. ZrO 2 nanoparticles can be observed on the electrodes. The cyclic voltammetry measurement show that the electrochemical active surface area of porous PbO 2-ZrO 2 nanocomposite electrodes is 3 times than that of planar PbO 2-ZrO 2 electrodes. In the electrocatalytic oxidization process of crystal violet, the color and COD removal efficiency on the porous composite electrodes is 99.8% and 69.2% after 90 min. The degradation process follows pseudo-first-order kinetics. The rate constant for porous composite electrodes can reach 0.04916 min− 1, which is 4.5 times than that for planar composite electrodes (0.01188 min− 1). Moreover, the three-dimensional porous structure can enhance the generation capacity of hydroxyl radicals. The experiment results illustrate that the porous PbO 2-ZrO 2 nanocomposite electrodes have a great application potential in the pollutant degradation fields.
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