SO^2-4／CeO2-TiO2／HTLC 的制备及光催化性能

为利用TiO2作为光催化降解水中有机污染物，以铁铝水滑石为载体，以CeO2掺杂的TiO2为活性组分，制得光催化剂前体，再以SO^2-4对其进行修饰，制得了SO2-4／CeO2-TiO2／HTLC 光催化剂。采用XRD、SEM、EDS 和UV-Vis DRS等手段对催化剂进行了表征；以甲基橙为模拟污染物，考察了催化剂样品的光催化性能。实验结果表明：CeO2掺杂TiO2粒子在可见光区吸光性能高于TiO2；SO2-4与CeO2-TiO2／HTLC有协同催化作用，SO2-4／CeO2-TiO2／HTLC光催化剂对可见光的吸收大大增强。经模拟日光照射2 h，SO2-4改性的15％（ CeO2-TiO2）／HTLC催化剂对甲基橙的脱色率达到93％。

Preparation and Photocatalytic Performance of SO2-4/CeO2 -TiO2/HTLC

In order to degrade organic pollutants in water, SO2-4 /CeO2 -TiO2/HTLC photocatalyst was prepared, taking Fe-Al hydrotalcite as support, Cerium-doped TiO2 as the active component to prepare the photocatalyst precursor CeO2 -TiO2/LDOs, which is modified by soak method in H2 SO4 solution.The catalyst was character-ized by means of XRD, SEM, EDS and UV-Vis DRS.With methyl orange as model pollutant, the photocata-lytic performance of the catalysts was determined.Experimental results showed that the absorption of CeO2 -TiO2 particle for the visible light is stronger than TiO2; there is a synergistic effect between SO2-4 and CeO2 -TiO2/HTLC;and the absorption of SO2-4 /CeO2 -TiO2/HTLC photocatalyst for visible light is enhanced.The decolori-zation rate of modified SO2-4 /15%（ CeO2 -TiO2 ）/HTLC photocatalyst for methyl orange reaches 93%after irra-diation under simulated sunlight for 2 hours.