Ni<sup>2+</sup>掺杂对纳米TiO<sub>2</sub>薄膜亲水性的影响

Ni²⁺掺杂对纳米TiO₂薄膜亲水性的影响

摘要: 用溶胶-凝胶法在玻璃上制备了锐钛矿型TiO₂和过渡金属镍掺杂TiO₂薄膜。采用XRD、原子力显微镜和表面接触角仪等手段对TiO₂薄膜进行了表征。结果表明,少量的镍离子掺杂在一定程度上抑制了TiO₂晶粒的生长,提高了薄膜的表面能态,从而改善TiO₂薄膜亲水性能和光致亲水性能。镍掺杂摩尔分数2.0%、500℃热处理2 h后,较未掺杂薄膜的亲水性能大幅提高,掺杂镍的薄膜在黑暗中放置一周后仍能表现出超亲水性。

Abstract: A series of Ni²⁺ doped TiO₂ thin films were prepared by sol-gel method.The effect of doped-Ni content on the hy-drophilic properties of the film was studied by means of XRD,AFM and surface contact angle method.The results show that with doped Ni²⁺,crystal growing of the TiO₂ was inhibited,the surface energy was increased and the photo-induced super-hy-drophilicity was improved.The 2.0% mol Ni-doped TiO₂ thin film retained super-hydrophilicity even after being placed in darkness for a week.