Abstract:

WO₃ films were deposited on glass substrates by reactive magnetron sputtering，their catalytic activity and service life were studied via photodegradation for methylene blue and rhodamine B solutions. Experimental results showed that the prepared WO₃ films are amorphous as characterized by X-ray diffraction（XRD）. Being irradiated for 3 h by ultraviolet light，the maximum degradation rate of methylene blue and rhodamine B solutions were 83.36% and 72.73%，respectively. The photodegradation rate of methylene blue remained at 75% after reused for three times of the WO₃ films. The photocatalytic activity of the WO₃ films almost disappeared after using for seven times. The deactivated WO₃ films could be regenerated by ultrasonic treatment in deionized water for 30 min，with which the photodegradation rate of methylene blue could be improved from 20% to 81%.

摘要：

采用射频反应磁控溅射工艺在玻璃基片上沉积了非晶态WO₃薄膜。通过光催化降解亚甲基蓝和罗丹明B溶液实验，研究了所制WO₃薄膜的光催化活性和使用寿命。X射线衍射（XRD）分析表明：所制备的WO₃薄膜为非晶态。光催化实验表明：紫外光照3 h后，薄膜对亚甲基蓝和罗丹明B溶液的最大降解率分别为83.26%和72.73%。重复使用3次后，薄膜对亚甲基蓝的降解率保持在75%以上，7次使用后薄膜基本丧失光催化活性。采用去离子水超声处理30 min的方法可使已失活薄膜对亚甲基蓝的降解率从20% 恢复至81%。