催化学报

催化学报 ›› 2009, Vol. 30 ›› Issue (2): 154-158.

• 研究论文 • 上一篇    下一篇

铈掺杂Ti/TiO2电极的制备及催化降解油田废水性能

张翼1,于婷1,张玉洁2,吴盛文1   

  1. 1 大庆石油学院化学化工学院, 黑龙江大庆 163318; 2 大庆油田有限责任公司第二采油厂, 黑龙江大庆 163414
  • 收稿日期:2009-02-25 出版日期:2009-02-25 发布日期:2012-11-21

Preparation of Ce-Doped Ti/TiO2 Electrodes and Its Catalytic Performance for Degradation of Oil-Field Wastewater

ZHANG Yi1, YU Ting1*, ZHANG Yujie2, WU Shengwen1   

  1. 1 School of Chemistry and Chemical Engineering, Daqing Petroleum Institute, Daqing 163318, Heilongjiang, China; 2 No.2 Oil Production Company, Daqing Oilfield Company Limited, Daqing 163414, Heilongjiang, China
  • Received:2009-02-25 Online:2009-02-25 Published:2012-11-21

PDF

847

被引次数

36

摘要： 用溶胶-凝胶法制备了稀土(Ce)掺杂TiO2电极,优化了制备改性TiO2电极的稀土掺杂量、热处理温度及热处理时间. 借助于油田废水化学需氧量(COD)去除情况分析了电极的电催化氧化能力,并分析了电极结构与电催化特性之间的关系. 采用SEM, EDX和XRD分析了制备电极的表面形貌、元素组成和晶体结构. 结果表明,掺杂Ce后电极的表面凹凸感变小,表面更为平滑、致密,几乎没有裂缝,这种均匀一致的高密度小碎片结构可能具有较大的表面粗糙度和比表面积,有利于催化反应. TiO2电极的晶体结构主要为锐钛矿型. 稀土的掺入使得晶相所对应的衍射峰强度变弱且峰形宽化,说明适量Ce的掺杂使涂层表面TiO2晶粒细化了. 在掺杂比为Ti∶Ce=100∶1.5, 热处理温度为450 ℃, 热处理时间为90 min时制备的掺杂Ce元素的电极性能最好,此电极对目标有机物COD去除率达到80%, 而不掺杂稀土元素的Ti/TiO2电极为阳极时COD去除率在同样时间内仅为62%, 说明稀土的掺杂提高了电极催化性能.

关键词: 溶胶-凝胶法, 铈, 二氧化钛电极, 锐钛矿, 油田废水

Abstract: Ce-doped Ti/TiO2 electrodes were prepared by the sol-gel method under the op timal conditions of temperature of 450 ℃, time of 90 min, and doping amount of Ce 1 .5%. Ce doping enhanced the catalytic pe rformance of the electrode. The chemical oxygen demand reduction of oil-field w as tewater was up to 80% after 90 min treatment with the Ce-dope d Ti/TiO2 electrode.

Key words: sol-gel method, cerium, titania electrode, anatase, oil-field wastewater