Department of Pharmaceutical and Bioengineering, School of Chemical Engineering, Sichuan University, Chengdu, 610065, China.
College of Chemistry and Environment Protection Engineering, Southwest Minzu University, Chengdu, 610041, China.
Environ Sci Pollut Res Int. 2018 Sep;25(26):26259-26266. doi: 10.1007/s11356-018-2679-6. Epub 2018 Jul 5.
TiO shows great potential as ideal and powerful photocatalyst to degrade and eliminate harmful organic pollutants from waste water. It is desirable to prepare anatase TiO with good aqueous solubility and photocatalytic activity for water decontamination. In this paper, water-soluble TiO nanoparticles were successfully prepared using polytetramethylene ether glycol (PTMG), poly(ethylene glycol) (PEG), and poly(propylene glycol) (PPG) as stabilizers. The anatase phase of TiO was well controlled by introduction of HCl in the reaction system. The results showed that all the polymer-capped TiO were well dissolved in water and their aqueous solutions could maintain stable for more than 2 months. The photocatalytic activities of polymer-capped TiO were evaluated by monitoring the degradation of Rhodamine B (RhB) with Degussa P25 as a control. The results showed that all the polymer-capped TiO presented better photocatalytic activity than that of Degussa P25. PTMG capped TiO exhibited the longest average lifetime of charge carriers, indicating the lowest charge recombination rate. Thus, PTMG capped TiO presented the best photocatalytic activity. In summary, PTMG, PEG, and PPG can be used as stabilizers to prepare water-soluble TiO. PTMG is an ideal stabilizer for the synthesis of water-soluble TiO with good photocatalytic activity.
TiO 作为理想且强大的光催化剂，具有降解和消除废水中有害有机污染物的巨大潜力。理想情况下，应制备具有良好水溶性和光催化活性的锐钛矿 TiO 以用于水净化。本文采用聚四氢呋喃醚二醇（PTMG）、聚乙二醇（PEG）和聚丙二醇（PPG）作为稳定剂，成功制备了水溶性 TiO 纳米粒子。通过在反应体系中引入 HCl 可以很好地控制 TiO 的锐钛矿相。结果表明，所有聚合物封端的 TiO 都很好地溶解在水中，其水溶液可以稳定超过 2 个月。通过监测 Rhodamine B（RhB）的降解来评估聚合物封端的 TiO 的光催化活性，以 Degussa P25 作为对照。结果表明，所有聚合物封端的 TiO 都表现出比 Degussa P25 更好的光催化活性。PTMG 封端的 TiO 表现出最长的载流子平均寿命，表明载流子复合率最低。因此，PTMG 封端的 TiO 表现出最好的光催化活性。综上所述，PTMG、PEG 和 PPG 可用作制备水溶性 TiO 的稳定剂。PTMG 是合成具有良好光催化活性的水溶性 TiO 的理想稳定剂。
