ABSTRACT

In this study, the impinging stream-rotating packed bed and precipitation method were used to continuously prepare Fe and Co co-doped Titanium Dioxide by in-situ modification. With TiOSO₄ solution containing Fe and Co₂₊ and NH_3·H₂O were sprayed on the packing and sheared by the packing that rotated at a high speed, resulting in improvement of microscopic mixing. The prepared catalyst is anatase with a particle size of 14 nm and a specific surface area of 194.34 m²/g. The photoresponse range is extended to 550 nm with a band gap of 2.5 eV. The photoluminescence results show that doping of Fe and Co can effectively inhibit the recombination of photogenerated electron-hole pairs. The percentage decomposition of 100 mg/L phenol under UV and visible light irradiation for 2.5 h is 88.71% and 24.58%, which is 1.59 and 2.07 times that for pure TiO₂.

摘要

本研究采用冲击流旋转填充床和沉淀法原位改性连续制备Fe和Co共掺杂二氧化钛。将含有Fe和Co _{2+ 的}TiOSO ₄溶液和NH _3· H ₂ O喷洒在填料上并被高速旋转的填料剪切，从而改善微观混合。制备的催化剂为锐钛矿型，粒径为14 nm，比表面积为194.34 m ²/G。光响应范围扩展到 550 nm，带隙为 2.5 eV。光致发光结果表明，Fe和Co的掺杂可以有效抑制光生电子-空穴对的复合。100 mg/L苯酚在紫外光和可见光照射2.5 h的分解率分别为88.71%和24.58%，分别是纯TiO _{2 的}1.59和2.07倍。