Eu^(3+)掺杂TiO_2光催化剂的制备及废水处理性能研究

Synthesis of Eu^(3+) doped nanometer titanium dioxide photocatalyst and its application in wastewater treatment

以钛酸四正丁酯、氯化铕为原料,采用溶胶-凝胶法合成了Eu3+掺杂纳米TiO2光催化剂,借助X-射线粉末衍射(XRD)及UV-Vis测试手段对样品进行了表征,并以罗丹明B为模型污染物考察了Eu3+掺杂量对样品光催化活性的影响规律。XRD分析表明,所得粉体均为锐钛矿相纳米TiO2,且Eu3+掺杂后随着掺杂量的增加,纳米TiO2特征衍射峰宽化,强度降低;UV-Vis光谱分析表明,适量铕掺杂使得催化剂在400~600 nm的可见光区对光的吸收显著增强,对光具有更高的利用率;以罗丹明B为降解物的光催化实验表明,当Eu3+掺杂量为0.5%时其光催化活性最好,并将该光催化剂用于炼油厂废水的处理,对其实际应用进行了探索。

Using tetrabutyltitanate, europium chloride as starting materials, Eu3＋ doped nanometer TiO2 was synthesized by sol-gel method, and characterized by XRD and UV-Vis techniques. Rhodamine B was chosen as model pollutant to evaluate photoeatalytic activity. XRD analysis results indicated that the assynthesized samples were pure phase anatase nanometer TiO2. UV-Vis absorption spectrum indicated after Eu3＋ doped TiO2 had stronger absorption in UV region. Photocatalytic experiment results show when the doping quantity approximately was 0.5% , nanometer TiO2 has the best activity, and is applied to waste water treatment, investigates its practical application.