Ao Yanhui, Xu Jingjing, Shen Xunwei, Fu Degang, Yuan Chunwei
School of Chemistry and Chemical Engineering, Southeast University, Nanjing 210096, China.
J Hazard Mater. 2008 Dec 30;160(2-3):295-300. doi: 10.1016/j.jhazmat.2008.02.114. Epub 2008 Mar 8.
A novel magnetically separable composite photocatalyst, anatase titania-coated magnetic activated carbon (TMAC), was prepared in this article. In the synthesis, magnetic activated carbon (MAC) was firstly obtained by adsorbing magnetic Fe3O4 nanoparticles onto the activated carbon (AC), and then the obtained MAC was directly coated by anatase titania nanoparticles prepared at low temperature (i.e. 75 degrees C). The prepared samples were characterized by XRD, SEM and vibrating sample magnetometer (VSM). The composite photocatalyst can be easily separated from solution by a magnet, its photocatalytic activity in degradation of phenol in aqueous solution also has dramatic enhancement compared to that of the neat titania.
本文制备了一种新型的磁分离复合光催化剂——锐钛矿型二氧化钛包覆磁性活性炭（TMAC）。在合成过程中，首先通过将磁性Fe3O4纳米颗粒吸附到活性炭（AC）上获得磁性活性炭（MAC），然后用低温（即75摄氏度）制备的锐钛矿型二氧化钛纳米颗粒直接包覆所得的MAC。通过X射线衍射（XRD）、扫描电子显微镜（SEM）和振动样品磁强计（VSM）对制备的样品进行了表征。该复合光催化剂可以通过磁铁轻松地从溶液中分离出来，与纯二氧化钛相比，其在水溶液中降解苯酚的光催化活性也有显著提高。
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