...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Building and Environment >Effect of titanium dioxide properties and support material on photocatalytic oxidation of indoor air pollutants
【24h】

Effect of titanium dioxide properties and support material on photocatalytic oxidation of indoor air pollutants

机译：二氧化钛性能及载体材料对室内空气污染物光催化氧化的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相关主题

摘要

Indoor air purification through photocatalytic oxidation (PCO) has been demonstrated to be an effective technique; nevertheless, further research is needed to address some of the existing shortcomings of PCO systems. In the present study, the influence of titanium dioxide (TiO2) features and the type of support material on the performance of PCO air purifiers are investigated. TiO2 photocatalysts are prepared via hydrothermal route followed by a calcination step (300-800 degrees C). Calcination temperature offers a good control over the characteristics of titania, in particular crystallinity and surface area, enabling fabrication of TiO2 with the most desirable set of properties. Two support materials with distinct adsorption properties, namely nickel foam filter (NFF) and activated carbon fiber (ACF) are examined for deposition of TiO2. The developed photocatalytic filters are evaluated by the removal efficiency of methyl ethyl ketone (MEK) and the amount of generated by-products. The photocatalyst calcined at 300 degrees C exhibited the highest activity, which was roughly 1.6 times higher than that of commercial P25. This can be attributed to the fact that at 300 degrees C the best trade-off between degree of crystallinity, crystal phase/size, surface area, and surface hydroxyl groups population was reached. The steady-state MEK removal efficiency and amount of by-products were 62.2% and 180 ppb for TiO2/ACF and 36.3% and 217.5 ppb for TiO2/NFF, respectively. This synergistic effect of TiO2/ACF and the concept of in-situ regeneration of ACF are also discussed.
机译：通过光催化氧化（PCO）的室内空气净化已被证明是一种有效的技术;尽管如此，需要进一步研究来解决PCO系统的一些现有缺点。在本研究中，研究了二氧化钛（TiO2）特征和载体类型对PCO空气净化器的性能的影响。通过水热途径制备TiO2光催化剂，然后通过煅烧步骤（300-800℃）。煅烧温度对二氧化钛，特别是结晶度和表面积的特性提供了良好的控制，从而能够用最理想的一组性能制造TiO 2。检查具有不同吸附性能的两个载体材料，即镍泡沫过滤器（NFF）和活性炭纤维（ACF）以沉积TiO2。通过甲基乙基酮（MEK）的去除效率和产生的副产物的量来评价型光催化过滤器。在300摄氏度下煅烧的光催化剂表现出最高活动，比商业P25高出1.6倍。这可以归因于，在300摄氏度下，结晶度，晶相/尺寸，表面积和表面羟基群之间的最佳折衷。 TiO2 / ACF的稳态MEK去除效率和副产物的量分别为62.2％和180ppb，分别为TiO2 / NFF 36.3％和217.5 ppb。还讨论了TiO2 / ACF的这种协同效应和ACF的原位再生的概念。

著录项

获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号