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采用四氯化钛控制水解合成了不同形貌的金红石型二氧化钛,考察了聚乙二醇-1000(PEG-1000)对产物形貌的影响,并用XRD,TEM和UV-Vis等手段对样品进行了表征.不同条件下的实验结果表明,不加PEG-1000时梭形二氧化钛随体系中酸度的增加和四氯化钛初始浓度的降低而团聚的倾向减缓,加入PEG-1000后,所得二氧化钛纳米粒子的粒径随PEG含量的增加而变小.对酞酸酯类(PEs)环境污染物的降解实验结果表明,通过此法合成的纳米级二氧化钛具有较高的催化活性.降解程度及降解产物用GC-MS进行检测.最后推导出PEs可能的降解过程.
The effects of PEG-1000 (PEG-1000) on the morphology of the product were investigated by the hydrolysis of titanium tetrachloride. The samples were characterized by XRD, TEM and UV-Vis The experimental results under different conditions showed that the fusibility of the titania with the increase of acidity and the initial concentration of titanium tetrachloride decreased with the addition of PEG-1000 and the tendency of agglomeration slowed down. When PEG-1000 was added, The particle size decreases with the increase of PEG content.Experimental results on the degradation of environmental pollutants of phthalic esters (PEs) show that the nanoscale titania synthesized by this method has higher catalytic activity.The degradation degree and degradation products GC-MS was used to detect the possible degradation of PEs.