摘要
针对纳米氧化钛光催化性能研究中缺乏统一有效表征标准的现状,比较了二氯乙酸、罗丹明B和甲基橙三种光催化活性评价物的热稳定性和对紫外光的稳定性,并以氧化钛纳米薄膜为光催化剂,研究了三种评价物的光催化降解效率表征,以及酸碱度、通氧条件等因素对评价物在光催化活性表征中的影响及其机理,归纳了三种评价物对于纳米氧化钛光催化活性表征的优缺点。
Due to lack of common criterion for the photocatalytic activity estimation, it is hard to evaluate the photocatalytic efficiency of the nano -structured titania in different instance. In this paper, we compared the photodegradation efficiency of nano - titania films by using dichloroacetic acid, rhodamine B and methyl orange as the photocatalytic referents and the ultraviolet lamp as the source light to generate the photocatalytic reaction. The thermal stability and photosensitivity of these referents were determined in order to reach the specific photocatalytic activity of the nano - structured titania in each case. At the same time,we discussed the characters of these referents under the different pH and both with and without oxygen pumping, with the aim of finding the proper one for the photocatalytic efficiency evaluation.
出处
《玻璃与搪瓷》
CAS
2005年第6期10-14,共5页
Glass & Enamel
基金
上海市科委纳米专项基金项目(0352nm070)
关键词
光催化
TiO2纳米薄膜
二氯乙酸
甲基橙
罗丹明B
photocatalysis
nano - titania film
dichloroacetic acid
methyl orange
rhodamine B
