摘要
空气污染问题日益严重,汽车尾气是空气污染物的主要来源之一,二氧化钛(TiO_(2))可用于光催化降解汽车尾气,受到了各个国家的高度认可和广泛研究。本文综述了TiO_(2)光催化降解汽车尾气技术的研究进展,从TiO_(2)光催化效率与骨料暴露面积、不同环境条件下TiO_(2)对NO氧化率、混凝土路面TiO_(2)光催化涂层耐久性评价、火焰喷雾热解法制备纳米TiO_(2)复合材料四个方面进行了论述。诸多研究结果表明:TiO_(2)光催化剂作为涂层材料比直接将其掺入混凝土中有更好的降解效果;TiO_(2)对NO的氧化率与NO的浓度和UVA的辐射度呈正相关,与相对湿度呈负相关,与流速没有相关性;TiO_(2)光催化剂不会对混凝土路面的耐久性和耐磨性产生影响;利用火焰喷雾热解法制备纳米TiO_(2)材料行之有效并可以工业化生产。
The problem of air pollution is becoming more and more serious,and automobile exhaust is the main source to air pollution.Titanium dioxide(TiO_(2))can be used for photocatalytic degradation of automobile exhaust,which has been highly recognized and widely studied in various countries.The paper reviews the research progress of TiO_(2) photocatalytic degradation technology for automobile exhaust,including TiO_(2) photocatalytic efficiency and aggregate exposed area,TiO_(2) to NO oxidation rate under different environmental conditions,durability evaluation of TiO_(2) photocatalytic coating on concrete pavement and flame spray pyrolysis preparation of nano-TiO_(2) composites by solution method.These research results show that:TiO_(2) photocatalyst as a coating material has better degradation efficiency than direct incorporation into concrete;NO oxidation rate of TiO_(2) is positively correlated with NO concentration and UVA radiance,and negatively correlated with relative humidity,wheras there is no correlation with the flow rate;TiO_(2) photocatalyst will not affect the durability and wear resistance of concrete pavement;the preparation of nano-TiO_(2) materials by flame spray pyrolysis is effective and can be industrialized.
作者
黄鹏飞
杨扬
王栎浩
孙常凯
李凤龙
HUANG Pengfei;YANG Yang;WANG Yuehao;SUN Changkai;LI Fenglong(College of Civil and Architectural Engineering,Heilongjiang Institute of Technology,Harbin Heilongjiang 150050,China)
出处
《交通节能与环保》
2022年第5期15-18,共4页
Transport Energy Conservation & Environmental Protection
基金
黑龙江工程学院大学生创新创业训练计划项目(202111802077)
黑龙江省自然科学基金项目(LH2019E078)。
