【摘要】 通过酸催化溶胶-凝胶法在玻璃基板上制备具有高亲水性和光催化活性的Nd掺杂TiO₂薄膜。用XRD、SEM、TEM、FT-IR、光学接触角测量仪和紫外可见分光光度计研究Nd掺杂对薄膜的晶体结构、组成和光学性能的影响。结果表明,Nd掺杂对薄膜的亲水性和光催化性能有重要影响。Nd掺杂导致TiO₂晶格变形,抑制氧化钛由锐钛矿相向金红石相转变、紫外吸收光谱的红移,产生大量氢氧自由基（·OH）并加速表面的羟基化反应。当Nd掺杂量为0.1%（质量分数）时,薄膜颗粒尺寸最小,约为15 nm,薄膜的亲水性能最佳,接触角仅为8.1°,且92%的亚甲基蓝被光催化分解。此外,对Nd掺杂的改性机理进行讨论。更多还原

【Abstract】 The Nd-doped TiO₂ thin films with higher hydrophilic and photocatalytic activities were prepared on glass slides by an acid-catalyzed sol-gel method.The effects of Nd doping on crystalline phase,surface composition and optical property were investigated by means of techniques such as X-ray diffraction（XRD）,scanning electron microscopy（SEM）,transmission electron microscopy（TEM）,Fourier transform infrared spectroscopy（FT-IR）,optical contact angle tester and UV-Vis spectroscopy.The results show that Nd doping obviously influences the hydrophilic and photocatalytic activities of TiO₂ thin films.Nd doping could cause the TiO₂ lattice distortion,inhibit phase transition from anatase to rutile,cause red shift of the absorption spectrum edge,produce hydroxyl radicals（OH）,and accelerate surface hydroxylation,which result in a significant improvement in the hydrophilicity and photoreactivity of Nd-doped TiO₂ thin films.When the content of Nd is 0.1%（mass fraction）,TiO₂ thin films achieve the smallest grain size（about 15 nm）,and the hydrophilic and photocatalytic activities of TiO₂ thin film reach the maximum,the contact angle is only 8.1°,and 92%of methylene blue is finally degraded.Moreover,the modification mechanism of Nd doping was also discussed.更多还原