Peralta-Hernández J M, Meas-Vong Yunny, Rodríguez Francisco J, Chapman Thomas W, Maldonado Manuel I, Godínez Luis A
Electrochemistry Department, Centro de Investigación y Desarrollo Tecnológico en Electroquímica, Parque Tecnológico Querétaro Sanfandila, Pedro Escobedo, 76700, Querétaro, México.
Water Res. 2006 May;40(9):1754-62. doi: 10.1016/j.watres.2006.03.004. Epub 2006 Apr 19.
In this work, the design and construction of an annular tube reactor for the electrochemical and photo-electrochemical in situ generation of H2O2 are described. By cathodic reduction of dissolved oxygen and the coupled oxidation of water at a UV-illuminated nanocrystalline-TiO2 semiconductor anode, it was found that the electrochemically generated H2O2 can be employed to readily oxidize the model compound Direct Yellow-52 in dilute acidic solution at high rates in the presence of small quantities of dissolved iron(II). Although, the model organic compound is chemically stable under UV radiation, its electrochemical oxidation rate increases substantially when the semiconductor anode is illuminated as compared to the same processes carried out in the dark.
在这项工作中，描述了一种用于电化学和光电化学原位生成过氧化氢的环形管式反应器的设计与构建。通过在紫外线照射的纳米晶二氧化钛半导体阳极上对溶解氧进行阴极还原以及水的耦合氧化，发现在少量溶解铁（II）存在的情况下，电化学生成的过氧化氢可用于在稀酸性溶液中快速氧化模型化合物直接黄-52。尽管该模型有机化合物在紫外线辐射下化学性质稳定，但与在黑暗中进行的相同过程相比，当半导体阳极受到光照时，其电化学氧化速率会大幅提高。
