Bindhu M R, Willington T David, Hatshan Mohammad Rafe, Chen Shen-Ming, Chen Tse-Wei
Department of Physics, Sree Devi Kumari Women's College, Kuzhithurai, 629163, Tamilnadu, India.
Department of Physics and Research Centre, Nesamony Memorial Christian College, Marthandam, Affiliated to Manonmaniam Sundaranar University, Abishekapatti, Tirunelveli, Tamil Nadu, India.
Environ Res. 2022 May 1;207:112108. doi: 10.1016/j.envres.2021.112108. Epub 2021 Sep 24.
Environmental route such as degradation of toxic dyes can be improved through photochemical activity such as light driven photocatalytic degradation. Herein, fluorine and tin simultaneously doped TiO nanoparticles were synthesized and characterized. The formation of anatase phase in synthesized samples and the reduction in the crystallite size of doped TiO was confirmed from XRD results. The existence of O-Ti-O stretching vibration in pure and co-doped TiO confirmed from FTIR results. Optical studies reveal that the band gap of co-doped TiO is increased and hence it was concluded that the particle size of co-doped TiO is reduced compared with as-synthesized TiO. The morphologies of TiO changed significantly with doping of fluorine and tin. It reveals majority of the particles are hexagons, pentagons and ellipse shaped and some of them are spheres with a mean particle size of 31.17 nm. PL studies showed the reduction in intensity for Sn-F/TiO accredited to the lesser recombination rate of electron-hole pair under UV light irradiation. Thus tin and fluorine doped TiO could be considered as a good candidate for photocatalytic activity. The photocatalytic activity of TiO and Sn-F/TiO nanoparticles was analyzed separately through the degradation of methylene blue (MB) under visible and UV light irradiation. The use of Sn and F ions in the synthesis of TiO are revealed not only create small sized nanoparticles but these water soluble nanoparticles have very good antibacterial and antifungal action by inhibiting the growth of bacteria and fungus.
诸如通过光驱动光催化降解等光化学活性可以改善环境途径，如有毒染料的降解。在此，合成并表征了氟和锡同时掺杂的TiO纳米颗粒。XRD结果证实了合成样品中锐钛矿相的形成以及掺杂TiO的微晶尺寸减小。FTIR结果证实了纯TiO和共掺杂TiO中存在O-Ti-O伸缩振动。光学研究表明，共掺杂TiO的带隙增大，因此得出结论，与合成的TiO相比，共掺杂TiO的粒径减小。TiO的形态随着氟和锡的掺杂而显著变化。结果表明，大多数颗粒为六边形、五边形和椭圆形，其中一些是平均粒径为31.17 nm的球形。PL研究表明，Sn-F/TiO强度降低，这归因于紫外光照射下电子-空穴对的复合率较低。因此，锡和氟掺杂的TiO可被视为光催化活性的良好候选材料。通过在可见光和紫外光照射下亚甲基蓝（MB）的降解，分别分析了TiO和Sn-F/TiO纳米颗粒的光催化活性。结果表明，在TiO的合成中使用Sn和F离子不仅能制备出小尺寸的纳米颗粒，而且这些水溶性纳米颗粒通过抑制细菌和真菌的生长具有很好的抗菌和抗真菌作用。
