采用石英晶体微天平现场技术,研究了胆红素在纳米TiO2表面的吸附动力学行为,并考察了溶液pH、硅烷亲脂性试剂及金属离子修饰的纳米TiO2对胆红素吸附的影响。结果表明,胆红素在纳米TiO2表面的吸附平衡常数K为2·0×106L/mol;由于亲水性纳米TiO2表面的羟基和胆红素分子中的羧基发生作用,胆红素吸附量随溶液pH增大而增大;但经过硅烷试剂亲脂性修饰后,吸附量随pH增大而下降;经过金属离子修饰后,改变了TiO2表面电荷导致吸附量增加,且吸附量随金属离子电荷增加而增加,当金属离子所带电荷相同时,吸附量基本相同。 The adsorption kinetics of bilirubin on the surface of nano-TiO2 was studied by on-site quartz crystal microbalance. The effects of solution pH, silane-lipophilic reagent and metal ion-modified nano-TiO2 on the adsorption of bilirubin were also investigated. The results showed that the equilibrium constant K of bilirubin adsorption on the surface of nano-TiO2 was 2.0 × 10 6 L / mol. The adsorption of bilirubin by the carboxyl groups on the surface of hydrophilic nano-TiO 2 and bilirubin The pH of the solution increased and then increased. However, the amount of adsorption decreased with the increase of pH after the lipophilic modification of silane reagent. After the metal ions were modified, the surface charge of TiO2 was changed and the adsorption capacity was increased. The adsorption capacity increased with the increase of metal ion charge The increase, when the metal ions with the same charge, the adsorption amount is basically the same.