摘要
本文研究了1-苯基-5-巯基四氮唑(PMT)光降解过程.研究结果表明,在光照条件下,PMT在TiO_2悬浮液中可被完全降解无机化.介质的酸碱性对降解的速度,降解的程度有很大影响.存在于显影废液中的阴离子如Br^-,S_2O_3^(-2),EDTA^2等对降解有不同程度的抑制作用.文中讨论了PMT光催化降解过程的机理和动力学.
The photodegradation of phenylmercaptotetrazole(PMT) was studied in this paper. It was found that PMT could be photodegradated under UV-illumination in aqueous titanium dioxide (TiO2) suspensions. The reaction was importantly influenced by pH. Some anions appearing in photographic developer, such as Br_, S2O2-3 ,and EDTA2- etc,inhibited the photodegradation. The mechanism and kinetics of PMT photodegradation ware discussed. As the intermediates,the phenyl ring could be easily-oxidized into carbon dioxide and water,to further photocatalytic oxidation of the tetrazole ring,however, was very difficult.
