| 郭加欣,张巧玲,刘有智,畅俊波.化学通报,2017,80(3):288-292. |
| 旋转盘反应器中负载型Fe-TiO2光催化降解含酚废水 |
| Photocatalytic Degradation of Phenol-containing Wastewater by TiO2 Catalysts Doped with Fe Supported in a Spinning Disc Reactor |
| 投稿时间：2016-07-23 修订日期：2016-09-07 |
| DOI： |
| 中文关键词: Fe掺杂 TiO2 光催化 含酚废水 旋转盘反应器 |
| 英文关键词:Fe doped TiO2 Photocatalysis Phenol-containing wastewater Spinning disc reactor |
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| 摘要点击次数: 2017 |
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| 中文摘要: |
| 以溶胶凝胶法制备Fe掺杂TiO2（Fe-TiO2）并将其负载于旋转盘反应器的圆盘表面，用于降解含酚废水。采用X射线衍射光谱（XRD）、拉曼光谱（Raman）、扫描电镜（SEM）、紫外-可见漫反射（UV-Vis）光谱等分析手段对制备的催化剂进行了表征，并考察了参杂量和焙烧温度对其催化性能的影响。结果表明，Fe3 进入TiO2晶格内部替代了Ti4 ，引起晶体内部缺陷增加，拓宽了光响应范围，提高了纳米光催化剂的光催化活性。随着Fe掺杂量的增加，光催化剂的催化活性呈现先升高后降低的趋势。焙烧温度可影响光催化剂晶型，随着温度升高，金红石型比例增大。掺杂量0.5%和焙烧温度600 ℃时，制备的负载型Fe-TiO2催化剂具有较高催化活性，用于降解1L苯酚溶液，循环处理2 h后苯酚的降解率达到75%，较纯TiO2提高20%以上。 |
| 英文摘要: |
| TiO2 doped with iron (Fe-TiO2) were prepared by Sol-Gel Method, and loaded on the disc surface of spinning disc reactor for the degradation of phenol-containing wastewater. Fe-TiO2 catalysts were determined using X-ray diffraction (XRD), Raman spectrum (Raman), scanning electron microscopy (SEM), ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis). Two factors that affected the degradation efficiency such as doping amount and calcination temperature were investigated. The results showed that some of Ti4 inside the TiO2 lattice internal was replaced by Fe3 result in increasing internal crystal defects, broadening light response range and improving the photocatalytic activity of nanometer photocatalyst. With the increasing of Fe doping amount, the catalytic activity of the photocatalyst was firstly increased and then decreased. Calcination temperature can affect the photocatalyst crystalline form, rutile proportion increases with increasing temperature. The degradation effect of Fe-TiO2 is the best for phenol-containing wastewater when doping amount is 0.5% and calcination temperature is 600℃. The degradation rate of phenol reached 75% when circulation is 1L, compared with pure TiO2 increased by more than 20%. |
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