纳米CeO_2基光催化材料的尾气降解效能及最佳掺量  

Exhaust Degradation Performance and Optimum Dosage of Ceria-based Photocatalytic Nanomaterials

作　　者：耿九光[1,2] 李毅[2] 张晨旭[2] 

机构地区：[1]长安大学交通铺面材料教育部工程研究中心,陕西西安710064 [2]长安大学材料科学与工程学院,陕西西安710064

出　　处：《公路交通科技》2014年第4期153-158,共6页Journal of Highway and Transportation Research and Development

基　　金：中央高校基本科研业务费专项资金项目(CHD2011JC187);2012年国家级大学生创新创业训练计划(201210710121)

摘　　要：为降低汽车尾气所带来的危害,提升空气质量,研制了一种尾气降解纳米复合涂层材料,通过气体反应室内的尾气降解试验分析了该材料对汽车尾气的降解效果,提出采用累计降解百分率、最大降解反应时间、平均降解速率3项指标评价光催化降解尾气效率的方法,并以此确定了光催化材料的最佳掺量。试验结果表明:所制备的复合涂层材料能高效催化降解汽车尾气中的NOx、HC等有害气体,其最大降解百分率可分别达到94%和12%,但该涂层材料对CO、CO2降解效果不明显;综合降解效能和经济成本等多方面因素,涂层材料中光催化剂纳米二氧化铈和二氧化钛的推荐掺量分别为10%和5%。A composite coating nanomaterial in automobile exhaust degradation is developed to reduce harms of automobile exhaust and improve air quality. The degradation effect of the material for automobile exhaust is analyzed by the degradation test in exhaust reaction chamber. The evaluation indexes such as cumulative degradation percentage, the maximum degradation reaction time, average degradation rate are proposed to evaluate the photocatalytic exhaust degradation efficiency and determine the optimum dosage of photocatalytic materials. The test result indicates that （1） the developed composite coating can efficiently catalyze and degrade harmful gases such as NOx and HC in automobile exhaust, whose maximum degradation percentages are 94% and 12% respectively, but the effect on the degradation of CO and CO2 is not obvious; （2） the recommended dosages of nanoceria and titanium dioxide in coating photocatalytic material are 10% and 5% respectively, considering the factors like degradation efficiency and economic cost.

关 键 词：环境工程 尾气降解 评价指标 光催化材料 最佳用量 

分 类 号：X734.201[环境科学与工程—环境工程]