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首页> 外文期刊>RSC Advances >Mechanistic pathways for the degradation of SMX drug and floatation of degraded products using F–Pt co-doped TiO2 photocatalysts
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Mechanistic pathways for the degradation of SMX drug and floatation of degraded products using F–Pt co-doped TiO2 photocatalysts

机译：使用F-PT共掺杂TiO2光催化剂降解SMX药物和降解产物漂浮的机械途径

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This work presents smart pathways to enhance the photocatalytic activity of TiO _(2) via co-doping with fluorine (F) and platinum (Pt) to form F–Pt co-doped TiO _(2) photocatalysts and investigates the unique and unusual fluorination of the floated products. Our investigations indicate that the crystalline structure of the photocatalysts was a mixture of anatase and brookite phases and that the nanoparticles of the synthesized nanocomposites had nanometric sizes (4–25 nm). The F–Pt co-doped TiO _(2) nano-photocatalysts demonstrated degradation of sulfamethoxazole (SMX) drug of >93% within 90 min under direct solar light and 58% degradation within 360 min under a solar simulator. Thus, co-doping TiO _(2) with F and Pt atoms to form F–Pt co-doped TiO _(2) nanocomposite is an efficient pathway to achieve high photocatalytic performance escorted with the formation of floating metal-fluoropolymer, unlike pristine TiO _(2) which has less photocatalytic degradation and no generation of a floating polymer. Our photocatalytic protocol demonstrates that the degradation of SMX started with redox reactions of oxygen and water absorbed on the surface of the prepared nanocomposites to form superoxide anions (O _(2) ˙ ~(?) ) and hydroxy radicals (˙OH) which have oxidation superpower. The resultant products were subsequently fluorinated by fluoride radical ions and floated as metal-fluoropolymer.
机译：该工作呈现智能途径，通过用氟（F）和铂（Pt）通过共掺杂来增强TiO _（2）的光催化活性，形成F-Pt共掺杂TiO _（2）光催化剂，并研究独特和不寻常的氟化产物的氟化。我们的研究表明，光催化剂的结晶结构是锐钛矿和布鲁克石相的混合物，并且合成纳米复合材料的纳米颗粒具有纳米尺寸（4-25nm）。 F-Pt共掺杂TiO _（2）纳米光催化剂在直接太阳光线下在90分钟内显示出> 93％的磺胺甲恶唑（SMX）药物的降解，在太阳模拟器下360分钟内降解58％。因此，具有F和Pt原子的共掺杂TiO_（2）以形成F-Pt共掺杂TiO _（2）纳米复合材料是一种有效的途径，以实现具有浮动金属 - 含氟聚合物的形成伴随的高光催化性能，与原始含有浮动金属聚合物TiO _（2）具有较少的光催化降解和不产生浮浮聚合物。我们的光催化方案表明SMX的降解从制备的纳米复合材料表面上吸收的氧气和水的氧化还原反应以形成超氧化物阴离子（O _（2）×〜（α））和具有的羟基自由基（˙OH）氧化超级大国。随后将所得产物氟化氟离子氟化，作为金属 - 含氟聚合物漂浮。

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