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首页> 外文期刊>Environmental Science & Technology >Development and Optimization of a TiO_2-Coated Fiber-Optic Cable Reactor: Photocatalytic Degradation of 4-Chlorophenol
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Development and Optimization of a TiO_2-Coated Fiber-Optic Cable Reactor: Photocatalytic Degradation of 4-Chlorophenol

机译:TiO_2涂层光纤反应器的开发和优化:光催化降解4-氯苯酚

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摘要

We have developed, characterized, and utilized a photochemical reactor system that employs an optical fiber cable as a means of light transmission to solid-supported TiO_2. Light energy is transmitted to Ti02 particles, which are chemically anchored onto quartz fiber cores, via radial refraction of light out of the fiber. Operational factors that influence the efficiency of the bundled-array optical fiber reactor are as follows: the uniformity and extent of light propagation down the fiber, the degree of light absorption by the TiO_2 coating of the refracted light, and the ability of the chemical substrates to diffuse intotheTiO_2 coating. A TiO_2 coating layer that minimizes the interfacial surface area of the quartz core and TiO_2 particles and operation with incident irradiation angles near 90° enhance light propagation down the fibers. A maximum quantum efficiency of φ = 0.011 for the oxidation of 4-chlorophenol was achieved. This can be compared to a maximum quantum efficiency of φ = 0.0065 for 4-chlorophenol oxidation in a TiO_2 slurry reactor operated under similar conditions.
机译:我们已经开发,表征并利用了光化学反应器系统,该系统使用光纤电缆作为将光传输到固体负载的TiO_2的手段。光能通过光从光纤中的径向折射传输到TiO2颗粒,该颗粒化学固定在石英纤维芯上。影响捆束阵列光纤反应器效率的操作因素如下:光沿光纤传播的均匀性和程度,折射光的TiO_2涂层对光的吸收程度以及化学基质的能力扩散到TiO_2涂层中。 TiO_2涂层可将石英芯和TiO_2颗粒的界面表面积最小化,并且在入射角接近90°的情况下工作可增强光沿纤维的传播。对于4-氯苯酚的氧化,实现了最大量子效率φ= 0.011。这可以与在相似条件下运行的TiO_2淤浆反应器中4-氯苯酚氧化的最大量子效率φ= 0.0065进行比较。

著录项

  • 来源
    《Environmental Science & Technology》 |1995年第12期|p.2974-2981|共8页
  • 作者单位

    Environmental Engineering Science, W. M. Keck Laboratories, California Institute of Technology, Pasadena, California 91125;

  • 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 环境化学;
  • 关键词

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