Preparation and characteristics of a nano-PbO2 anode for organic wastewater treatment
Preparation and characteristics of a nano-PbO2 anode for organic wastewater treatment
复制标题
DOI：
10.1016/j.cej.2010.08.018
复制
发表时间：
2011
影响因子：
15.1
通讯作者：
Chaogui Tan;B. Xiang;Yijiu Li;Jian Fang;Min Huang
中科院分区：
文献类型：
--
作者：
Chaogui Tan;B. Xiang;Yijiu Li;Jian Fang;Min Huang
采用脉冲电沉积（PED）法制备了纳米PbO 2阳极（PbO 2/NT）。采用电化学阳极氧化法制备了自组织TiO 2纳米管（NT）阵列，并将其作为基底，采用PED法负载PbO 2。通过场发射扫描电子显微镜和X-射线衍射研究了纳米二氧化铅粒子的形貌和结构特性，揭示了纳米二氧化铅粒子在NT壁上的成功沉积。结果表明，TiO 2纳米管阵列负载PbO 2电极（PbO 2/NT）的电化学活性受电镀时间的影响。计时电流实验表明，PbO 2/NT阳极比传统的PbO 2/Ti阳极具有更强的氧化能力。PbO 2/NT由于其独特的微观结构，在碱性条件下能有效地氧化氯气。电流密度对PbO 2/NT去除总有机碳（TOC）的影响因有机反应物的不同而异。异丙醇的TOC去除率主要受传质控制，而4-氯酚（4-CP）的去除率主要受钝化影响。研究了pH、流速和支持电解质对PbO 2/NT或PbO 2/Ti体系TOC去除率的协同效应。
A nano-PbO2anode (PbO2/NT) was prepared by a pulse electrodeposition (PED) method. Self-organized TiO2nanotube (NT) arrays were produced by electrochemical anodization and used as a substrate to load PbO2by PED method. The morphological and structural properties were studied by the field-emission scanning electron microscopy and X-ray diffraction revealing successful deposition of lead dioxide nanoparticles on the NT walls. The electrochemical activity of PbO2loaded on TiO2nanotube arrays electrode (PbO2/NT) was found to be influenced by the length of electrochemical plating time. Chronoamperometric experiments showed that PbO2/NT anodes possessed stronger oxidation ability than that of traditional PbO2anodes (PbO2/Ti). PbO2/NT, due to its unique microstructure, could oxidize chlorine effectively under basic conditions. The effect of current density on total organic carbon (TOC) removal by PbO2/NT varied with different organic reactants used. The TOC removal rate of isopropanol was controlled by mass transfer, while the removal rate of 4-chlorophenol (4-CP) was mainly influenced by passivation. The synergistic effects of pH, flow rate, and supporting electrolyte on the TOC removal percentage using PbO2/NT or PbO2/Ti were investigated as well.