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首页> 外文期刊>Journal of Hazardous Materials >Double-side active TiO_2-modified nanofiltration membranes in continuous flow photocatalytic reactors for effective water purification
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Double-side active TiO_2-modified nanofiltration membranes in continuous flow photocatalytic reactors for effective water purification

机译：连续流光催化反应器中的双面活性TiO_2改性纳米过滤膜，可有效净化水

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摘要

A chemical vapour deposition (CVD) based innovative approach was applied with the purpose to develop composite TiO_2 photocatalytic nanofiltration (NF) membranes. The method involved pyrolytic decomposition of titanium tetraisopropoxide (TTIP) vapor and formation of TiO_2 nanoparticles through homogeneous gas phase reactions and aggregation of the produced intermediate species. The grown nanoparticles diffused and deposited on the surface of γ-alumina NF membrane tubes. The CVD reac tor allowed for online monitoring of the carrier gas permeability during the treatment, providing a first insight on the pore efficiency and thickness of the formed photocatalytic layers. In addition, the thin TiO_2 deposits were developed on both membrane sides without sacrificing the high yield rates. Impor tant innovation was also introduced in what concerns the photocatalytic performance evaluation. The membrane efficiency to photo degrade typical water pollutants, was evaluated in a continuous flow water purification device, applying UV irradiation on both membrane sides. The developed composite NF mem branes were highly efficient in the decomposition of methyl orange exhibiting low adsorption-fouling tendency and high water permeability.
机译：基于化学气相沉积（CVD）的创新方法被用于开发复合TiO_2光催化纳米过滤（NF）膜。该方法涉及四异丙醇钛（TTIP）蒸气的热解分解，以及通过均相气相反应和生成的中间物种的聚集形成TiO_2纳米粒子。生长的纳米颗粒扩散并沉积在γ-氧化铝NF膜管的表面。 CVD反应器可在线监测处理过程中的载气渗透性，从而首次了解形成的光催化层的孔隙效率和厚度。另外，在不牺牲高产率的情况下，在薄膜的两面都形成了薄的TiO_2沉积物。在有关光催化性能评估方面也引入了重要的创新。在连续流水净化设备中，通过在膜的两面都进行紫外线照射，对光降解典型水污染物的膜效率进行了评估。研制的复合NF mem膜在甲基橙的分解中表现出很高的效率，表现出低的吸附结垢趋势和高的水渗透性。

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  • 来源
    《Journal of Hazardous Materials》 |2012年第15期|p.304-316|共13页
  • 作者

    G.Em.Romanos; C.P. Athanasekou; F.K. Katsaros; N.K.Kanellopoulos; D.D.Dionysiou; V. Likodimos; P. Falaras;

  • 作者单位

    Institute of Physical Chemistry, NCSR Demokritos, 153 10 Agio Paraskevi Attikis, Athens. Greece;

    Institute of Physical Chemistry, NCSR Demokritos, 153 10 Agio Paraskevi Attikis, Athens. Greece;

    Institute of Physical Chemistry, NCSR Demokritos, 153 10 Agio Paraskevi Attikis, Athens. Greece;

    Institute of Physical Chemistry, NCSR Demokritos, 153 10 Agio Paraskevi Attikis, Athens. Greece;

    Department of Civil and Environmental Engineering, University of Cincinnati, Cincinnati, OH 45221-0071, USA;

    Institute of Physical Chemistry, NCSR Demokritos, 153 10 Agio Paraskevi Attikis, Athens. Greece;

    Institute of Physical Chemistry, NCSR Demokritos, 153 10 Agio Paraskevi Attikis, Athens. Greece;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    NF membranes; continuous flow; ultra thin TiO_2 layers; pollutant photodegradation; water purification;

    机译：NF膜;连续流TiO_2超薄层;污染物的光降解净水;

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