本文采用常温络合—控制水解法, 以TiCl4, 有机羧酸, 氨水, 硝酸铕, D-山梨醇等为主要实验药品, 制备了Eu掺杂纳米TiO2光触媒乳液。以酸性红3R染料为待降解物, 分别考察了不同条件下制备的TiO2光触媒乳液在太阳光模拟器生成光照射下的光催化性能。此外, 还考察了Eu掺杂纳米二氧化钛透明光触媒乳液对于不同浓度染料的光催化性能。通过酸性红3R染料的降解实验, 研究了影响Eu掺杂纳米二氧化钛透明光触媒乳液光催化活性的因素。通过X射线衍射仪(XRD)、纳米激光粒度分析仪、紫外可见分光光度计(UV-Vis)等对样品进行表征。结果表明: 样品的平均粒度为4.1 nm左右, 晶型为锐钛矿, 样品的吸收光谱可拓宽至可见光区。当Eu掺杂量为03%, pH值为6, 回流时间是15 min时, 制备的Eu掺杂纳米二氧化钛光触媒乳液的光催化性能最佳。该光触媒乳液经太阳光照射1 h之后, 对浓度为25 mg/L的酸性红3R模型反应物的降解效率最高, 达到97%以上。

Eu-doped nano-TiO2 photocatalyst emulsion has been prepared by a novel complexation-controlled hydrolysis method at room temperature using TiCl4, organic carboxylic acid, NH3·H2O, europium nitrate and D-sorbitol etc. as experimental raw materials. The acid red 3R dye was taken as the degradation product, and the photocatalytic performance of TiO2 photocatalyst emulsion prepared under different irradiation effects through the irradiation of solar simulator was investigated. In addition, the photocatalytic performance of Eu-doped nano-titanium dioxide photocatalyst emulsion for different concentrations of dyes was studied. The photocatalytic activity of Eu-doped nano-titanium dioxide photocatalyst was studied by the degradation experiment of acid red 3R dye. The phase structure, particle size, and absorption spectrum of samples were characterized by X-ray diffraction(XRD), nano-laser particle size analyzer and UV-visible spectrophotometer(UV-Vis), respectively. The results show that the average particle size of the sample is about 41 nm, the crystal form is anatase, and the absorption spectrum of the sample can be widened to the visible region. The best photocatalytic activity of prepared Eu-doped nano-TiO2 photocatalyst emulsion is shown when the doping content of Eu is 03%, pH value is 6 and the reflux time is 15 min. After being irradiated by sunlight for 1 h, the photocatalyst emulsion has the highest degradation efficiency of over 97% for acid red 3R model reactant with a concentration of 25 mg/L.