引用本文:
【打印本页】   【HTML】   【下载PDF全文】   View/Add Comment  【EndNote】   【RefMan】   【BibTex】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 1167次   下载 971 本文二维码信息
码上扫一扫!
分享到: 微信 更多
Preparation and Photo-catalytic Activity of Nano-Iron Oxide/Bentonites
Liu Ying1, Li Yimin1,2, Li Haiyang*1,3
1.Laboratory of Environment Spectroscopy,Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Hefei 230031;2.Department of Chemistry,Shaoxing College of Arts and Sciences,Shaoxing 312000;3.Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023
Abstract:
Using the surfactant(PVA)in the preparation process,the nano-iron oxide / Bentonites were prepared through a reaction between a solution of iron salt and a dispersion of Bentonite clay. The X-ray diffraction(XRD)results reveal that the catalysts mainly consist of α-Fe2O3 . The photo-catalytic activity of iron oxide / Bentonites was examined in the photo-assisted degradation of an organic azo-dye Orange Ⅱ. It is found that the photo-catalytic activity of the catalysts is much higher than that of α-Fe2O3 . The experimental results(using the different catalysts in which the quantities of Fe2O3 are equal)demonstrate that the photo-catalytic activity of catalysts is as follows:Fe-A > Fe-B > Fe-C > Fe-D. In addition,the research shows that Orange Ⅱ degradation ratio of heterogeneous photo-Fenton process is higher than that of homogeneous one.
Key words:  Photo-catalytic activity,Orange Ⅱ,Polyvinyl alcohol,Nano-Fe2O3 / Bentonites
FundProject:
纳米Fe2O3/膨润土复合催化剂的制备及光催化活性
刘颖1, 李益民1,2, 李海洋*1,3
1.中国科学院安徽光学精密机械研究所环境光谱学实验室,合肥 230031;2.绍兴文理学院化学系,绍兴 312000;3.中国科学院大连化学物理研究所,大连 116023
摘要:
在合成过程中使用表面活性剂聚乙烯醇(PVA),通过铁盐与膨润土浆液反应制备纳米Fe2O3/膨润土复合催化剂. XRD分析结果表明,该复合物主要是由α-Fe2O3构成;并以橙二为目标污染物,对催化剂的催化活性进行了比较,复合催化剂的催化活性要远大于α-Fe2O3的催化活性;不同催化剂( 含有相同质量的α-Fe2O3)的催化活性为:Fe-A > Fe-B > Fe-C > Fe-D. 此外,对于复相光催化反应和均相光催化反应进行了比较,结果表明,复相光催化降解速率要远大于均相光催化降解速率.
关键词:  光催化活性  橙二  聚乙烯醇  纳米Fe2O3 / 膨润土
DOI:10.1088/1674-0068/17/3/317-320
分类号: