光催化纳米建筑涂料降解气态氦的研究.pdfVIP

全国中文核心期刊 杆癯建巍 圃 兴催化纳米建筇涂料降船 量太 —1芯萄昀砸穷 耿启金 ，马永生’，王西奎 ，王会勤 (1．潍坊学院化学化工系，山东 潍坊 261061； 2．济南大学化学化工学院，山东 济南 250022) 摘要：以掺加纳米TiO：制备的光催化纳米建筑涂料为催化剂，研究了气态氨在紫外光照射下的降解，探讨了TiO：光催化剂的 类型、催化剂用量、氨的初始浓度等对氦光催化降解的影响，并对氨的降解产物进行了分析，探讨了氨的光催化降解机理。结果表 明，掺加锐钛型纳米TiO：的光催化纳米建筑涂料具有较高的光催化活性，其光催化活性随着纳米TiO：添加量的增加而提高，氨的 光催化降解转化率随着氨初始浓度的增加而下降。氨的降解产物主要为NOr和NO 一，涂料的光催化活性通过水洗清除催化剂表面 的降解产物后可得到有效恢复。 关键词：纳米建筑涂料；光催化；TiO ；氨：降解 中图分类号：TU56，0643 文献识别码：A 文章编号：1001—702X(2008)01—0052—04 Study on degradation of gaseous ammonia by photocatalysis of nano architectural coating GENG Qijin ，MA Yongsheng ，WA NG Xikui ，WA NG Huiqin (1．Department of Chemical Engineering＆ Chemistry，Weifang University，Weifang 261061，Shangdong，China： 2．College of Chemistry and Chemical Engineering，Jinan University，Jinan 250022，Shangdong，China) Abstract：The degradation of gaseous ammonia under illumination of UV—light has been studied by using photocatalysis architectural coating containing nano-TiO2 as catalyst．The effects of type and content of TiO2 photocatalyst，and the initial concentration of ammonia on the degradation of anunonia photocatalysis were investigated．The degradation products of ammonia were analyzed and the degradation mechanism of ammonia photocatalysis was discussed．The results show that the anatase nano— TiO2 photocatalysis nano architectural coating has higher photocatalysis activity which is increased with increasing content of nano— TiO2 and the degradation conversion rate of ammonia photocatalysis is reduced with increasing of initial concentration of ammonia． The degradation products ot ammonia are mainly NO5 and N0i，and the photocatalysis act