以TiO2为光催化剂,研究了表面活性剂十二烷基苯磺酸钠(DBS)和有机颜料耐晒大红BBN(BBN)为混合组分的光催化降解.结果表明,pH值、底物的用量对体系的降解有显著影响.在碱性条件下,DBS的降解速率相对较快,而在酸性环境时,颜料的降解较快,在TiO2等电点时,降解最慢.酸性条件下,Ti02对BBN和DES的吸附性比在碱性和中性环境中大.BBN/DBS体系中,DBS增大了BBN的水溶性,但是没有明显提高BBN的降解褪色速度.DBS浓度为0.42 g/L时,颜料降解最快,0.042 g/L时次之,2.1 g/L时最低.在BBN降解过程中DBS自身也被降解,且略有促进作用.
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