ZnTi_(0.6)Fe_(1.4)O_4/膨胀石墨复合物对污染物的吸附-光催化降解活性  

Adsorption-photocatalytic degradation activity of ZnTi_(0.6)Fe_(1.4)O_4/expanded graphite composites on contaminants

作　　者：冯建涛[1] 陈海峰[1] 李良超[1] 

机构地区：[1]浙江师范大学化学与生命科学学院,金华321004

出　　处：《中国科学：化学》2015年第10期1075-1088,共14页SCIENTIA SINICA Chimica

基　　金：国家自然科学基金(21071125)资助

摘　　要：用化学共沉淀法制备了Zn Ti0.6Fe1.4O4/膨胀石墨(ZT0.6F1.4/EG)复合物.通过现代分析技术表征了样品的组成、微观结构、磁性能、吸附性能和光催化活性.结果表明,ZT0.6F1.4/EG不仅保持了膨胀石墨原有的特殊结构和吸附性能,并且具有良好的ZT0.6F1.4负载率、磁性能和光催化活性;样品对罗丹明B(Rh B)的去除率取决于EG的吸附作用和ZT0.6F1.4的光催化降解作用;ZT0.6F1.4和EG质量比(mZTF/mEG)为1:1的ZT0.6F1.4/EG复合物对Rh B的最大吸附量(qm)为5.102mg g?1,且吸附行为与Langmuir等温吸附模型相一致.ZT0.6F1.4/EG对工业染料废水、柴油/水混合溶液也具有良好的去污效果.此外,ZT0.6F1.4/EG回收方便、活化处理简便、循环使用性能良好.ZnTi0.6Fe1.4O4/expanded graphite （ZnTi0.6Fe1.4/EG） composites were prepared by chemical co-precipitation method. The composition, microstructure, magnetic property, adsorption and photocatalytic activity of the samples were characterized by means of modern analytical techniques. The results indicated that ZnTi0.6Fe1.4/EG composites not only held the original special structure and good adsorption properties of EG, but also had suitable magnetic property and photocatalytic activity. The removal rate of the samples on rhodamine B depends on two factors, the first and most important one is the adsorption of EG, and the other one is the photocatalytic degradation of ZnTi0.6Fe1.44 in the composites. The maximum adsorption amount （qm） of ZnTi0.6Fe1.4/EG （mZTF/mEC=1：1） is up to 5.102 mg g ^-1 for rhodamine B, and its adsorption behavior is in accord with Langmuir model. Furthermore, the ZnTi0.6Fe1.4/EG composites had good decontamination capability on industrial dye wastewater and oil/water solution. In addition, the samples can be recovered conveniently, activated easily and have good performance for recycling.

关 键 词：锌钛铁氧体 膨胀石墨 污染物 吸附 光催化降解 

分 类 号：X791[环境科学与工程—环境工程]