With the purpose of enhancing the photocatalytic activity of titania (TiO 2 ) coatings with low cost, a method of sulfuric-acid-bath pretreatment followed by simple oxidation in air has been proposed to fabricate TiO 2 coatings. The effect of oxidation temperature on the crystal structure, surface morphologies and photocatalytic activity of TiO 2 coatings was investigated, to figure out the suitable oxidation temperature. XRD and Raman’s results show that the phase transformation of TiO 2 starts at 773 K. The surface morphologies of TiO 2 coatings clearly show the porous-like structure at lower than 873 K. With raising the temperature, the photocatalytic activity of TiO 2 coatings firstly increases, then decreases, and reaches the highest at relatively low oxidation temperature of 773 K.

中文翻译：

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硫酸盐浴预处理在相对较低的氧化温度下制备的二氧化钛涂层的光催化活性增强

为了以低成本提高二氧化钛（TiO 2 ）涂层的光催化活性，有人提出了一种硫酸浴预处理然后在空气中简单氧化的方法来制备TiO 2 涂层。研究了氧化温度对TiO 2 涂层晶体结构、表面形貌和光催化活性的影响，以确定合适的氧化温度。XRD和Raman的结果表明TiO 2 的相变开始于773 K。TiO 2 涂层的表面形貌在低于873 K时清晰地显示出类孔结构。随着温度的升高，TiO 2 涂层的光催化活性首先升高，然后降低，并在相对较低的氧化温度 773 K 处达到最高值。