Impact of Mixed Nitrogen Dioxide (NO_2) and Nitrogen Oxide (NO) Gases on Titanium Dioxide Photodegradation of NO_x

机译：二氧化氮（NO_2）和一氧化氮（NO）混合气体对二氧化钛光降解NO_x的影响

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Nitrogen oxides (NO_x) emitted from vehicle exhausts are associated with adverse health effects on the public. Self-cleaning, air-purifying concrete pavement is a rapidly emerging technology that can be constructed using photocatalyst such as titanium dioxide (TiO_2). The main objective of this study was to evaluate the environmental effectiveness of TiO_2 coating in photodegrading mixed NO_2 and NO gases from the atmosphere. Results of the experimental program determined that increasing the flow rate and NO_2/NO_x ratio negatively affect the effectiveness of the photocatalytic process. However, within the evaluated range, the titanium content and aggregate gradation had little impact on NO_x removal efficiency. The highest photodegradation rate was observed at 25% relative humidity, which balances the availability of hydroxyl radicals at the surface with NO_x contact with the photocatalytic surface.

机译：汽车尾气排放的氮氧化物（NO_x）与公众健康受到不利影响。自清洁，空气净化的混凝土路面是一项快速发展的技术，可以使用光催化剂（如二氧化钛（TiO_2））来构造。这项研究的主要目的是评估TiO_2涂层在光降解大气中的混合NO_2和NO气体方面的环境有效性。实验程序的结果确定增加流速和NO_2 / NO_x比率会对光催化过程的有效性产生负面影响。但是，在评估范围内，钛含量和聚集体的分级对NO_x去除效率的影响很小。在25％的相对湿度下观察到了最高的光降解速率，这使表面的羟基自由基与NO_x与光催化表面的接触达到了平衡。

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《Transportation and Development Institute congress;TDI Congress 2011》|2012年|p.731-740|共10页
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Marion Schmitt; Heather Dylla; Marwa M. Hassan; Louay N. Mohammad; Tyson Rupnow; Earle Wright;
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中图分类交通运输经济;
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Impact of Mixed Nitrogen Dioxide (NO_2) and Nitrogen Oxide (NO) Gases on Titanium Dioxide Photodegradation of NO_x

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