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Fe2 O3 /膨润土复合催化剂 .XRD分析结果表明 ,该复合物主要是由α Fe2 O3 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 Fe2 O3 的催化活性 ;不同催化剂 (含有相同质量的α Fe2 O3 )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 .
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-Fe 2O 3. 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-Fe 2O 3. The experimental results (using the different catalysts in which the quantities of Fe 2O 3 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.
基金
Dedicatedtothe80thbirthdayofProfessorQiheZhu.ProjectsupportedbytheNationalNaturalScienceFoundationofChina(20073042)andtheNaturalScienceFoundationofZhejiangprovince(202018).
