Photocatalytic activities of nanometer tio2 are also evaluated by degradation of the crystal violet solution . experimental results indicate that the synergistic action of h2o2 and ultrasonic wave greatly enhances photo - catalytic reaction of tio2 通过结晶紫水溶液的光催化降解对二氧化钛的光催化活性进行了表征，实验结果显示过氧化氢和超声波的协同作用大大提高了tio _ 2光催化反应的效率。
