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首页> 外文会议>International Conference on Indoor Air Quality and Climate >Ozone catalytic oxidation of indoor formaldehyde over MnO_x-CeO_2/TiO_2 catalysts prepared by chemical vapor condensation at room temperature: effect of a ceria additive
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Ozone catalytic oxidation of indoor formaldehyde over MnO_x-CeO_2/TiO_2 catalysts prepared by chemical vapor condensation at room temperature: effect of a ceria additive

机译：室内甲醛的臭氧催化氧化在室温下通过化学蒸汽缩合制备的MNO_X-CEO_2 / TiO_2催化剂：二氧化铈添加剂的作用

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Formaldehyde (HCHO) is not only one of the harmful compounds in VOC_s, but also is known the indoor pollutant recognized as a major indoor pollutant (Zhao et al, 2012; Van et al, 2007). The introduction of some amount of noble metal loaded on TiO_2 surface is known to improve catalytic activity, especially, manganese oxides (MnO_x) alternatives to catalysts due to their potentially applications and high catalytic efficiency, sustained activity in the oxidation technology, and low cost. CeO_2 is well known as a good oxygen storage system and the incorporation of variable valence ions into ceria lattice has improved oxygen mobility and stability in typical VOC oxidation reactions. For that reason, many studies reported enhanced MnO_x-CeO_2/TiO_2 properties according to the synthesis methods. Recently, our research group (Park et al. 2011) successfully synthesizes the support materials by a chemical vapor condensation (CVC) method, proved the more active support and the subsequent Mn_2O_3/CVC-TiO_2 catalyst showed high dispersion, a large surface area and a small crystallite size. Moreover, these catalysts possessed higher catalytic oxidation activity for VOCs decomposition than the Mn_2O_3/P25-TiO_2, even at lower temperature (25°C). Thus, in this study, MnO_x-CeO_2/TiO_2 catalysts prepared using CVC method were used as a catalyst for the ozone (O_3) catalytic oxidation of formaldehyde (HCHO) at room-temperature selective.
机译：甲醛（HCHO）不仅是VOC_S中的一种有害化合物，而且还已知室内污染物被认为是一个主要的室内污染物（Zhao等，2012; Van等，2007）。已知在TiO_2表面上载有一定量的贵金属，特别是由于它们的潜在应用和高催化效率，氧化技术的持续活性以及低成本，改善催化活性，特别是锰氧化物（MnO_x）替代物。 CEO_2是良好的氧气储存系统，并将可变价离子掺入CERIA格子，在典型的VOC氧化反应中具有改善的氧气迁移率和稳定性。因此，许多研究报告了根据合成方法的增强的MNO_X-CEO_2 / TiO_2属性。最近，我们的研究组（Park等人2011）通过化学蒸汽缩合（CVC）方法成功地合成了支持材料，证明了更活跃的载体，随后的Mn_2O_3 / CVC-TiO_2催化剂显示出高分散体，大表面积和小微晶尺寸。此外，这些催化剂对于VOCS分解具有比MN_2O_3 / P25-TiO_2更高的VOCS分解的催化氧化活性，即使在较低温度（25℃）上也是如此。因此，在本研究中，使用CVC方法制备的MnO_X-CeO_2 / TiO_2催化剂用作室温选择性在室温下的臭氧（O_3）甲醛（Hcho）的臭氧（O_3）催化氧化的催化剂。

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