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考察了用于降解来自嘧啶家族的一种核酸—胸腺嘧啶(C5H6N2O2)的高级氧化过程.结果发现,在光催化剂TiO2作用下,胸腺嘧啶的光降解进行得很快,且在紫外光照射和水溶液中时更为明显.研究了胸腺嘧啶在TiO2催化剂上的吸附、降解动力学、以及pH值对光催化降解胸腺嘧啶性能的影响.另外,考察了胸腺嘧啶降解产物的矿化;比较和讨论了在光催化过程中胸腺嘧啶的消失和矿化速率.同时还研究了氮的矿化,确立了中间产物的识别方法.最后,采用电子密度计算提出了在紫外光照射下TiO2催化剂上胸腺嘧啶降解的可能化学途径.
The degradation of thymine (C5H6N2O2), a nucleic acid from the pyrimidine family, was investigated for its advanced oxidation process.It was found that photodegradation of thymine proceeded rapidly under the action of photocatalyst TiO2, and under UV irradiation and aqueous solution The effect of thymidine on the photocatalytic degradation of thymine was also investigated.In addition, the mineralization of thymine degradation products was investigated. The effects of thymidine on the degradation of thymine were compared and discussed The disappearance of thymine and the mineralization rate in the photocatalysis process.At the same time, the mineralization of nitrogen was also studied and the identification method of the intermediate product was established.Finally, the thymine degradation on the TiO2 catalyst under ultraviolet light irradiation Possible chemical routes.