Lahore College for Women University, Lahore 54000, Pakistan.
Lahore College for Women University, Lahore 54000, Pakistan.
J Photochem Photobiol B. 2018 Jun;183:357-366. doi: 10.1016/j.jphotobiol.2018.04.051. Epub 2018 May 1.
Zirconium Titanium dioxide (TiO: Zr) thin films were synthesized on glass substrates by the dip coating technique. The structural, optical, magnetic, photo-catalytic and antibacterial properties were explored for the films synthesized with zirconium concentration 10, 15, 20, 25 and 30 at.%. X-ray diffraction (XRD) revealed that the thin films contain anatase-rutile-brookite TiO and cubic-ZrO phases. Moreover, it was noticed that ZrO retarded the anatase-to-rutile transformation at high Zr doping percentage.The crystallite size of ZrO phase was in the range of 10.93-18.22 nm, whereas it was in the range of 13.5-21.59 nm for TiO phase for same Zr doping percentage. The band gap of films was in the range of 2.99-3.17 eV. The band gap value decreased with increase in Zr-doping percentage due to the creation localized levels near the conduction band providing a large number of electrons to reach the conduction band. Films showed room temperature ferro-magnetism due to the defects produced by Zr in TiO lattice. The antibacterial efficiency of ZrTiO thin films was investigated by utilizing disc diffusion method. Band gap was quite low, then pure TiO in the range 2.99-3.14 eV with Zr percentage 10-30% atom. The ZrTiO thin films with 20 and 25% Zr showed better antibacterial activity against Escherichia coli than 10, 15 and 30% Zr. It was found that ZrTiO thin films were effective solar light photo-catalyst.
氧化锆钛（TiO:Zr）薄膜通过浸涂技术在玻璃衬底上合成。研究了薄膜的结构、光学、磁性、光催化和抗菌性能，其中Zr 浓度分别为 10、15、20、25 和 30%。X 射线衍射（XRD）表明，薄膜包含锐钛矿-金红石-板钛矿 TiO 和立方 ZrO 相。此外，还注意到 ZrO 在高 Zr 掺杂百分比下会延迟锐钛矿向金红石的转变。ZrO 相的晶粒尺寸在 10.93-18.22nm 范围内，而 TiO 相的晶粒尺寸在相同 Zr 掺杂百分比下在 13.5-21.59nm 范围内。薄膜的带隙在 2.99-3.17eV 范围内。由于在导带附近形成局部能级，提供大量电子到达导带，因此薄膜的带隙值随 Zr 掺杂百分比的增加而降低。由于 Zr 在 TiO 晶格中产生的缺陷，薄膜表现出室温铁磁性。通过利用圆盘扩散法研究了 ZrTiO 薄膜的抗菌效率。带隙相当低，然后纯 TiO 在 2.99-3.14eV 范围内，Zr 百分比为 10-30%原子。20%和 25%Zr 的 ZrTiO 薄膜对大肠杆菌的抗菌活性优于 10%、15%和 30%Zr。发现 ZrTiO 薄膜是有效的太阳能光催化剂。
