• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Nanotechnology research journal >Electrodeposition of Electrocatalytic and Photocatalytic Fe/TiO_2 Composite Coatings Using Methanesulfonate Electrolytes
【24h】

Electrodeposition of Electrocatalytic and Photocatalytic Fe/TiO_2 Composite Coatings Using Methanesulfonate Electrolytes

机译：甲烷磺酸盐电解质对电催化和光催化Fe / TiO_2复合涂层的电沉积

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The chapter presents the main results of recent experimental investigation of the electrodeposition and characterization of Fe/TiO_2 composite coatings obtained from an environmentally friendly methanesulfonate iron plating bath containing colloidal TiO_2 particles. The effect of plating bath composition and electrolysis conditions on the content of titania particles in coatings has been investigated. The content of the TiO_2 particles in the electrodeposited composite coatings increases with an increase in titania concentrations in the suspension electrolyte and with a decrease in the current density. The kinetics of Fe/TiO_2 composites electrochemical deposition is shown to obey the improved Guglielmi's model. The inclusion of titania particles in the iron matrix results in an increase in microhardness of electrodeposits due to dispersion strengthening effect. The electrocatalytic properties of Fe/TiO_2 composites are studied by means of voltammetry, electrochemical impedance spectroscopy (EIS) and chronoamperometry methods. Iron/titania electrodeposited composite coatings exhibit enhanced electrocatalytic activity towards hydrogen and oxygen evolution reactions (HER and OER) in an alkaline solution. The electrocatalytic activity increases with an increase in TiO_2 content in iron matrix. The kinetic parameters are calculated on the basis of Tafel plots and EIS measurements and possible mechanisms of the HER and OER are considered. The chapter also reports the performance of Fe/TiO_2 electrodeposited composite coatings as heterogeneous photocatalysts for the decomposition of some organic contaminants. Although iron electrodeposited matrix is a cheap, available, nontoxic and easily repairable support for TiO_2 photocatalysts, it is not corrosion-resisting enough. In order to improve the corrosion stability, as-deposited Fe/TiO_2 composite coatings obtained from a methanesulfonate iron plating bath are modified by cathodic treatment in a solution containing cerium (III) methanesulfonate. As a result, a very thin layer of cerium oxides is formed on the surface of Fe matrix. The corrosion resistance of iron/titania coatings after their modification by ceria film is studied by means of voltammetry and electrochemical impedance spectroscopy. The surface modification of Fe/TiO_2 composites by ceria layer results in a marked improvement in their corrosion stability which allows their application as photocatalysts for wastewater treatment. The photocatalytic properties of TiO_2 particles immobilized on Fe/TiO_2 composite electrodeposits modified by ceria layers are tested in the reaction of photochemical degradation of methyl orange and methylene blue dyes in water under the action of UV radiation.
机译：本章介绍了最近的实验研究的主要结果，这些实验是从含有胶体TiO_2颗粒的环保甲烷磺酸铁电镀液中获得的Fe / TiO_2复合涂层的电沉积和表征的。研究了镀液组成和电解条件对涂料中二氧化钛颗粒含量的影响。电沉积复合涂层中TiO_2颗粒的含量随悬浮电解质中二氧化钛浓度的增加和电流密度的降低而增加。研究表明，Fe / TiO_2复合材料电化学沉积的动力学符合改进的Guglielmi模型。由于分散增强作用，铁基质中包含二氧化钛颗粒导致电沉积的显微硬度增加。通过伏安法，电化学阻抗谱（EIS）和计时电流法研究了Fe / TiO_2复合材料的电催化性能。铁/二氧化钛电沉积复合涂层在碱性溶液中对氢气和氧气逸出反应（HER和OER）表现出增强的电催化活性。电催化活性随铁基体中TiO_2含量的增加而增加。根据Tafel图和EIS测量值计算动力学参数，并考虑HER和OER的可能机理。本章还报告了Fe / TiO_2电沉积复合涂层作为非均相光催化剂分解某些有机污染物的性能。尽管铁电沉积基质是TiO_2光催化剂的便宜，可用，无毒且易于修复的载体，但它的耐腐蚀性不足。为了提高腐蚀稳定性，在包含甲磺酸铈（III）的溶液中通过阴极处理对从甲磺酸铁电镀液中获得的沉积的Fe / TiO_2复合涂层进行了改性。结果，在Fe基体的表面上形成了非常薄的氧化铈层。通过伏安法和电化学阻抗谱研究了二氧化铈膜改性后的铁/二氧化钛涂层的耐腐蚀性。二氧化铈层对Fe / TiO_2复合材料的表面改性导致其腐蚀稳定性有了显着改善，从而使其可用作废水处理的光催化剂。在紫外辐射的作用下，在水中甲基橙和亚甲基蓝染料的光化学降解反应中，测试了固定在二氧化铈层修饰的Fe / TiO_2复合电沉积物上的TiO_2颗粒的光催化性能。

著录项

  • 来源
    《Nanotechnology research journal》 |2017年第3期|445-490|共46页
  • 作者

    V. S. Protsenko; E. A. Vasileva; A. V. Tsurkan; F. I. Danilov;

  • 作者单位

    Ukrainian State University of Chemical Technology, Dnipro, Ukraine;

    Ukrainian State University of Chemical Technology, Dnipro, Ukraine;

    Ukrainian State University of Chemical Technology, Dnipro, Ukraine;

    Ukrainian State University of Chemical Technology, Dnipro, Ukraine;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号