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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Effect of Diffusional Film on Formation of Hydrogen Peroxide in Photocatalytic Reactions
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Effect of Diffusional Film on Formation of Hydrogen Peroxide in Photocatalytic Reactions

机译：扩散膜对光催化反应中过氧化氢形成的影响

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We recently found that photocatalytic reactions produce H_2O_2 at a concentration level of ppm(parts per million)from water.For some reason,however,other researchers have paid little attention to the formation of HiCh in this reaction.Of course,one of the reasons is due to low sensitivities of the conventional methods employed to measure the H_2O_2 concentration.However,we suppose that there is another reason which makes it difficult to measure it.To elucidate this reason,therefore,an effect of linear liquid velocity on the photocatalytic formation of H_2O_2 from water is experimentally investigated,and an explanation for the experimental result is made using a mathematical model that takes into consideration the formation and decomposition of H_2O_2 and its diffusion through a film in the neighborhood of the photocatalyst surface into a bulk liquid.This effect is also discussed on the formation of H_2O_2 from an aqueous solution of formic acid.As a result,it is concluded that the diffusion film is responsible for the reduction in the H_2O_2 concentration.
机译：最近，我们发现光催化反应从水中产生浓度为ppm（ppm）的H_2O_2。但是由于某些原因，其他研究人员却很少关注此反应中HiCh的形成。当然，原因之一这是由于测量H_2O_2浓度的常规方法灵敏度较低。但是，我们认为还有另一个原因使其难以测量。因此，为了阐明该原因，线性液体速度对光催化形成的影响实验研究了水中H_2O_2的含量，并使用数学模型对实验结果进行了解释，该模型考虑了H_2O_2的形成和分解以及其通过光催化剂表面附近的薄膜扩散到本体液体中的扩散。讨论了甲酸水溶液中H_2O_2生成的影响。钠离子膜负责减少H_2O_2的浓度。

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