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中文摘要：
以柠檬酸催化溶胶-凝胶法合成了晶粒尺寸为16.9nm的锐钛矿型N掺杂TiO2（N-TiO2）纳米颗粒,并用旋转涂膜法制备了N-TiO2纳米薄膜。采用石英晶体微天平（QCM）技术研究了胆红素在纳米N-TiO2膜表面的吸附动力学行为,考察了缓冲溶液pH、硅烷亲脂试剂三甲基氯硅烷及金属离子修饰纳米N-TiO2膜对胆红素吸附的影响。结果表明,胆红素在纳米N-TiO2表面的吸附平衡常数K为4.30×107 L.mol-1;亲水性N-TiO2表面羟基与胆红素分子中的羧基的酯化作用是胆红素吸附量随pH升高而增大的原因;金属离子修饰的N-TiO2表面电荷导致吸附量增加,其吸附量随离子电荷和相对原子质量的增加而增加。
英文摘要：
Anatase N-doped nanoparticles with average crystal size of 16.9 nm were synthesized by citric acid-assisted sol-gel method,and the N-TiO2 nanofilms were fabricated by circumvolving-spread film method.Quartz crystal microbalance（QCM） was employed to study the adsorption behavior of bilirubin on N-TiO2 films,and effects of buffer pH,surface modification of N-TiO2 with silane coupling agent and metal ions were studied.The results showed that the adsorption equilibrium constant was 4.30×107 L·mol-1.The amount of adsorption increased with the increasing of pH because of the reaction between-COOH of bilirubin and-OH of N-TiO2.When the surface of N-TiO2 was modified with metal ions,the adsorption amount of bilirubin increased with the increase of electric charge and relative atomic mass of metal ions,respectively.
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