FR-CNTs-PbO_2/SnO_2-Sb/Ti电极性能及电催化降解罗丹明B  

Study on the properties of FR-CNTs-PbO_2/SnO_2-Sb/Ti electrode and its application in electro-catalytic degradation of Rhodamine B

作　　者：吴根英[1] 许双姐[1] 王君翔[1] 柳建设[1] 许贺[1] 

机构地区：[1]东华大学环境科学与工程学院,上海201620

出　　处：《环境化学》2013年第3期358-365,共8页Environmental Chemistry

基　　金：国家自然科学基金(41073060);国家自然科学基金青年基金(21005014);上海市"晨光计划"(11CG34)资助

摘　　要：利用碳纳米管(CNTs)的优异性能和氟树脂(FR)的憎水性能,采用电化学共沉积法制备掺杂型FR-CNTs-PbO2/SnO2-Sb/Ti复合电极.运用扫描电子显微镜(SEM)和X射线衍射(XRD)仪对该电极的形貌和组成进行表征,采用接触角仪和阳极极化曲线对电极的电化学性能进行考察.结果表明,该电极比FR-PbO2/SnO2-Sb/Ti和PbO2/SnO2-Sb/Ti电极具有更强的憎水性能和更高的O2析出电位,这将有利于提高电极的电催化性能和电流利用效率.将FR-CNTs-PbO2/SnO2-Sb/Ti电极应用于罗丹明B(RhB)的降解研究,30 mA.cm-2电流密度下,处理10μmol.L-1RhB 15 min,RhB去除率高达90.21%.相同条件下,FR-PbO2/SnO2-Sb/Ti电极对RhB的去除率仅为69.08%.且FR-CNTs-PbO2/SnO2-Sb/Ti电极的反应速率常数为0.2215 min-1,是FR-PbO2/SnO2-Sb/Ti电极(k=0.1191 min-1)的近2倍.由此可见,较强的憎水性和较高的析氧电位,增强了FR-CNTs-PbO2/SnO2-Sb/Ti电极的电化学性质和电催化效果.In this paper,the doped FR-CNTs-PbO2/SnO2-Sb/Ti electrode was prepared by an electrolytic deposition technique based on the excellent performance of carbon nanotubes（CNTs） and the hydrophobicity of fluorine resin（FR）.The surface morphologies and composition of this electrode were examined by scanning electron microscopy（SEM） and X-Ray Diffraction（XRD）.The electrochemical performances of FR-CNTs-PbO2/SnO2-Sb/Ti electrode were investigated using the contact angle meter and anode polarization curve.The results showed that the FR-CNTs-PbO2/SnO2-Sb/Ti anode exhibits higher hydrophobicity and oxygen evolution potential than FR-PbO2/SnO2-Sb/Ti and PbO2/SnO2-Sb/Ti electrodes,which would be beneficial to the enhancement of electro-catalytic performance and current efficiency.Under the current density of 30 mA · cm-2,the removal efficiency of 10 μmol · L-1 RhB can be 90.21% in 15 min using the FR-CNTs-PbO2/SnO2-Sb/Ti electrode.However,the removal efficiency of RhB on FR-PbO2/SnO2-Sb/Ti electrode was 69.08% under the same conditions.Moreover,the reaction rate constant of FR-CNTs-PbO2/SnO2-Sb/Ti electrode can be 0.2215 min-1,which is nearly twice as high as that of FR-PbO2/SnO2-Sb/Ti electrode（k = 0.1191 min-1）.Thus,the electrochemical properties and the electro-catalytic effect of FR-CNTs-PbO2/SnO2-Sb/Ti electrode were significantly improved due to the enhancement of hydrophobicity and oxygen evolution potential.

关 键 词：碳纳米管 氧化铅 电化学降解 罗丹明B 

分 类 号：O643.32[理学—物理化学]