Abstract Through a simple reduction method, mesoporous anatase TiO2 cube was synthesized and the Ti3+ species and oxygen vacancies were successfully introduced into the anatase TiO2. CO2 and CO gases were produced by the thermal decomposition of oxalic acid and acted as a soft template to form the mesoporous structure, wherein CO acted as a reducing agent for reducing Ti4+ to Ti3+. The X-ray photoelectron spectroscopy spectra confirmed the presence of Ti3+ and oxygen vacancies in the samples. The UV–vis diffuse reflection spectra showed that the Ti3+ and oxygen vacancies shift the absorption edges of TiO2 from UV to the visible light region, which leaded to the enhanced photocatalytic activity. The charge carrier recombination rates of as-prepared samples were monitored by PL spectroscopy. The results showed that the trend was TiO2-3.70

中文翻译：

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通过简单还原法合成具有增强可见光光活性的 Ti3+ 自掺杂介孔 TiO2 立方体

摘要 通过简单的还原方法合成了介孔锐钛矿型TiO2立方体，并将Ti3+物种和氧空位成功引入锐钛矿型TiO2中。草酸热分解产生CO2和CO气体，作为软模板形成介孔结构，其中CO作为还原剂将Ti4+还原为Ti3+。X 射线光电子能谱证实样品中存在 Ti3+ 和氧空位。UV-vis漫反射光谱表明，Ti3+和氧空位将TiO2的吸收边从紫外区移到可见光区，从而提高了光催化活性。通过PL光谱监测所制备样品的电荷载流子复合率。结果表明趋势为TiO2-3.70