CAJ | 학술논문

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。
통과산최화용효?응효법재파리기판상제비구유고친수성화광최화활성적Nd참잡TiO2박막。용XRD、SEM、TEM、FT-IR、광학접촉각측량의화자외가견분광광도계연구Nd참잡대박막적정체결구、조성화광학성능적영향。결과표명，Nd참잡대박막적친수성화광최화성능유중요영향。Nd참잡도치TiO2정격변형，억제양화태유예태광상향금홍석상전변、자외흡수광보적홍이，산생대량경양자유기(·OH)병가속표면적간기화반응。당Nd참잡량위0.1%(질량분수)시，박막과립척촌최소，약위15 nm，박막적친수성능최가，접촉각부위8.1°，차92%적아갑기람피광최화분해。차외，대Nd참잡적개성궤리진행토론。
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 TiO2thin 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.