摘要
研制汽车尾气降解材料测试室,测试以超声波分散法制备的不同含量的5种纳米TiO2光催化材料,对汽车尾气因子的降解效能。选用车辆处于怠速工况下所排出的汽车尾气为试验样本,依据纳米光催化材料降解率计算公式,计算出不同含量的纳米TiO2光催化材料对汽车尾气中有害因子NOx、HC、CO的平均降解率。测试结果表明:纳米TiO2光催化材料对汽车尾气中NOx、HC、CO等因子具有一定的影响效能,且降解趋势一致。不同含量的纳米TiO2光催化材料,对汽车尾气中各因子的影响效能随时间的变化降解率不同;对应于汽车尾气因子NOx、HC、CO具有最佳降解效能的纳米TiO2光催化材料的含量分别为4%、2%、4%。
The testing chamber with degrading materials on automobile emission is developed to test the degradation efficiency on the automobile emission factors with five different densities Nano-TiO2 obtained by supersonic dispersion methed,The emission sample is collected when the vehicle is on idle.The mean degradation efficiencies of the Nano-TiO2 materials on NOx, HC, CO are calculated according to the formula of degradation efficiency. The experiments show that the Nano-TiO2 materials have certain influences on NOx HC, CO and the trends of the degradations are same.The degradation efficieneies of different Nano-TiO2 material densities on NOx, HC, CO differ as the time change.The optimum density of Nano-TiO2 of degrading NOx, HC, CO in automotive emission is 4%, 2%, 4% respectively. The Nano-TiO2 has efficiency degradation on NOx, but negative to HC and CO.
出处
《公路交通科技》
CAS
CSCD
北大核心
2007年第10期155-158,共4页
Journal of Highway and Transportation Research and Development
基金
黑龙江省交通厅重点科技项目(hjk20031205)
关键词
环境工程
降解效能
汽车尾气因子
纳米
TIO2
environmental engineering
degradation efficiency
automotive emission factor
Nano-TiO2