【摘要】 用醇盐水解法制备了TiO2 光催化剂 ,以TG DTA、XRD、BET和SEM等方法研究了TiO2 光催化剂物理化学特性 ,考察了添加聚乙烯醇对催化剂粒度大小及其催化活性的影响 .结果表明 ,添加聚乙烯醇能显著降低团聚度 ,加入 φ =0 5%～ 1 0 %聚乙烯醇制备的样品平均颗粒尺寸约 50nm ,具有较高的光催化活性 .更多还原

【Abstract】 Titanium dioxide photocatalysts were prepared by hydrolysis of tatinium alkoxide Their physicochemical characters were studied by using TG\|DTA, XRD, BET and SEM,and their photocatalytic reactivity was also detemined with the degradation of phenol as a probe reaction The results indicated that the presence of surfactant PVA at the synthesis solution of TiO 2 reduced significantly its agglomeration, and resulted in homogeneous nanometer TiO 2 particles.In the case of addition of 0 5%～1% of PVA,the resultant TiO 2 particles were about 30 nm insize and exhibitted the best photoreactivity.更多还原