多孔二氧化钛光催化降解亚甲基蓝的实验研究

Experimental Study on Photo-degradation of Methylene Blue by Porous Titania

二氧化钛由于其特殊的结构和性质而具有良好的光催化性能。以亚甲基蓝光催化氧化反应为评价体系,通过自制的多孔二氧化钛研究了吸收波长、亚甲基蓝浓度、pH、催化剂用量对光催化降解率的影响,并初步评价了不同煅烧温度下多孔二氧化钛的光催化活性。结果表明:吸收波长在666nm,亚甲基蓝溶液pH=5.0,催化剂浓度为1.0g/L时为最佳的光催化剂价条件。400℃煅烧2h所得的多孔二氧化钛表现出最高的光催化活性。

Titania has high photocatalysis performances due to its special structure and properties.Using the self-prepared porous titania as catalyst,methylene blue as degradation target,factors on degradation of MB were investigated,including absorbed wave length,concentration of MB,pH and catalyst dosage.Performances of porous titania calcined at different temperature were also evaluated.And the optimal experimental conditions are absorbed wave length of 666nm,pH=5.0 and catalyst dosage of 1.0 g/L. Porous calcined at 400℃ for 2h shows the highest photocatalytic activity.