• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Zinc–iron silicate for heterogeneous catalytic ozonation of acrylic acid: efficiency and mechanism
【24h】

Zinc–iron silicate for heterogeneous catalytic ozonation of acrylic acid: efficiency and mechanism

机译：用于丙烯酸的异质催化臭氧化的锌 - 铁硅酸盐：效率和机理

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This research aimed at researching the degradation of acrylic acid (AA) in aqueous solution, by catalytic and non-catalytic ozonation processes performed in a semi-continuous reactor. Zinc–iron silicate was synthesized and characterized using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) analysis, Fourier transformation infrared (FT-IR) and energy dispersive spectrometry (EDS). The characterization studies showed that Fe–Si binary oxide, Zn–Si binary oxide, ZnO and Fe _(2) O _(3) deposits were formed on the surface of poor crystallinity zinc–iron silicate which contained abundant functional groups. Catalytic ozonation test results revealed that zinc–iron silicate exhibited high catalytic activity and stability in catalytic ozonation of AA in aqueous solution. The inclusion of zinc–iron silicate in the ozonation process enhanced AA decomposition by 28.7% and TOC removal by 20%, compared to the ozonation alone. The main AA removal mechanisms involved direct oxidation by ozone and indirect oxidation by hydroxyl radicals generated by the ozone chain reaction accelerated by zinc–iron silicate. The surface characteristics and chemical composition are significant factors determining the catalytic activity of zinc–iron silicate.
机译：该研究旨在通过在半连续反应器中进行催化和非催化臭氧化方法研究水溶液中丙烯酸（AA）的降解。合成锌 - 铁硅酸盐，用X射线衍射（XRD），X射线光电子能谱（XPS）分析，傅里叶变换红外（FT-IR）和能量分散光谱（EDS）进行了特征。表征研究表明，在含有丰富的官能团的差的结晶性锌 - 铁硅酸盐表面上形成Fe-Si二元氧化物，Zn-Si二元氧化物，ZnO和Fe _（3）o℃沉积物。催化臭氧化试验结果显示，锌 - 铁硅酸盐在水溶液中催化臭氧化的催化活性和稳定性表现出高催化活性和稳定性。将锌 - 铁硅酸盐在臭氧处理过程中增强了28.7％的分解，与单独的臭氧相比，将TOC除去20％。主要AA去除机制涉及通过臭氧链反应产生的臭氧和间接氧化通过氧化铁硅酸铁加速的羟基自由基。表面特性和化学成分是确定硅酸盐催化活性的重要因素。

著录项

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