Blue TiO2 nanostructures were produced via Lithium/ethylenediamine (Li/EDA) reduction method and applied for photo-oxidative removal of harmful NOx gases under simulated solar light irradiation. Blue TiO2 possesses some unique physicochemical properties such as enhanced visible-light absorption, superficial defects or oxygen vacancies, and the evolution of Ti3+ species. Moreover, the photoluminescence spectra (PL) revealed the efficient separation of photoinduced electron-hole pairs in the modified blue TiO2 nanostructures, enhancing their photocatalytic activities. The results indicated that the blue TiO2 nanostructures exhibited the highest performance towards photo-oxidation of NOx gases, with an efficiency of 72.6% under simulated solar light irradiation.

中文翻译：

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用于有效光氧化去除有害 NOx 气体的改性蓝色 TiO2 纳米结构

通过锂/乙二胺 (Li/EDA) 还原法制备蓝色 TiO2 纳米结构，并应用于模拟太阳光照射下光氧化去除有害 NOx 气体。蓝色 TiO2 具有一些独特的物理化学性质，例如增强的可见光吸收、表面缺陷或氧空位以及 Ti3+ 物种的演化。此外，光致发光光谱（PL）揭示了改性蓝色 TiO2 纳米结构中光致电子-空穴对的有效分离，增强了它们的光催化活性。结果表明，蓝色 TiO2 纳米结构对 NOx 气体的光氧化表现出最高的性能，在模拟太阳光照射下的效率为 72.6%。