Preparation and Photoelectrochemical Property of PbO2-TiO2 Nanocomposite Electrodes
Preparation and Photoelectrochemical Property of PbO2-TiO2 Nanocomposite Electrodes
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DOI：
10.1149/2.0441501jes
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发表时间：
2015
影响因子：
3.9
通讯作者：
Yingwu Yao;Y. Li;Lihua Cui;N. Yu;Haishu Dong
中科院分区：
文献类型：
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作者：
Yingwu Yao;Y. Li;Lihua Cui;N. Yu;Haishu Dong
采用电沉积法在含有纳米tio2的硝酸铅溶液中制备了PbO - tio2纳米复合电极。研究了tio2浓度、电流密度和搅拌速率对PbO - tio2纳米复合电极中tio2纳米颗粒重量百分比（wt%）的影响。在含有8 g L−1 tio2纳米粒子的硝酸铅溶液中，电流密度为30 mA cm−2，搅拌速度为120 rpm， PbO - tio2纳米复合电极中tio2含量达到8.79 wt%。采用扫描电子显微镜（SEM）和x射线衍射仪（XRD）对PbO - tio2纳米复合电极的形貌和结构进行了表征。PbO - tio2纳米复合电极比PbO - 2电极更细、更紧凑。PbO - tio2纳米复合电极的使用寿命达到149 h，是PbO - tio2纳米复合电极的4倍。采用线性扫描伏安（LSV）、光电流响应（PCR）和电化学阻抗谱（EIS）研究了PbO - tio2纳米复合电极在紫外照射下的光电性能。结果表明，PbO - tio2纳米复合电极在紫外光照射下具有显著的光电流响应。经过120 min的光电催化降解，对MB和COD的去除率分别达到98.5%和70.7%，降解过程符合一级反应动力学。结果表明，PbO - tio2纳米复合电极是一种很有前途的光电催化负极材料。
PbO 2-TiO 2 nanocomposite electrodes were prepared by the electrodeposition method in the lead nitrate solution containing TiO 2 nanoparticles. The influences of TiO 2 concentration, current density and stirring rate on the weight percentage (wt%) of TiO 2 nanoparticles in the PbO 2-TiO 2 nanocomposite electrodes were investigated. TiO 2 content in the PbO 2-TiO 2 nanocomposite electrodes reaches 8.79 wt% from lead nitrate solution containing 8 g L− 1 TiO 2 nanoparticles with current density at 30 mA cm− 2 and stirring rate at 120 rpm. The morphology and structure of PbO 2-TiO 2 nanocomposite electrodes were characterized by scanning electrons microscopy (SEM) and X-ray diffraction (XRD). PbO 2-TiO 2 nanocomposite electrodes are finer and more compact than PbO 2 electrodes. The service life of PbO 2-TiO 2 nanocomposite electrodes reaches 149 h, which is four times longer than that of PbO 2 electrodes. The photoelectrochemical property of PbO 2-TiO 2 nanocomposite electrodes was investigated by linear sweep voltammogram (LSV), photocurrent response (PCR) and electrochemical impedance spectroscopy (EIS) under UV irradiation. The results show that PbO 2-TiO 2 nanocomposite electrodes possess remarkable photocurrent response under UV irradiation. The MB and COD removal efficiency reaches 98.5% and 70.7% by photoelectrocatalytic degradation after 120 min, the degradation process follow the first-order reaction kinetics. The results demonstrate that PbO 2-TiO 2 nanocomposite electrodes are promising photoelectrocatalytic anode materials.