We report a facile method for the synthesis of Na⁺/Ca²⁺ ions modified TiO₂ xerogels by coprecipitation followed by calcination process. The resultant materials are well characterized by powder X-ray diffraction, Raman spectroscopy, ultraviolet-visible diffuse reflectance spectroscopy and high resolution transmission electron microscopy. Presence of sodium and calcium ions can influence the crystallinity of rutile TiO₂. The photocatalytic performances of bare rutile TiO₂ along with modified materials such as Na-TiO₂, Ca-TiO₂, Na-Ca-TiO₂ materials are evaluated by calculating the amount of hydrogen evolved during the photocatalytic decomposition of water under light irradiation.This study will be effective informulating the effect of alkali/alkaline earth metal ions on the photocatalytic activity of rutile TiO₂.

中文翻译：

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共沉淀法合成Na + / Ca2 +离子修饰的TiO2干凝胶

我们报告了一种通过共沉淀然后煅烧工艺合成Na ⁺ / Ca ²⁺离子修饰的TiO ₂干凝胶的简便方法。所得材料通过粉末X射线衍射，拉曼光谱，紫外可见漫反射光谱和高分辨率透射电子显微镜得到很好的表征。钠和钙离子的存在会影响金红石型TiO ₂的结晶度。裸露的金红石型TiO ₂以及Na-TiO ₂，Ca-TiO ₂，Na-Ca-TiO ₂等改性材料的光催化性能通过计算光照射下水的光催化分解过程中析出的氢量来评价材料。这项研究将有效地揭示碱/碱土金属离子对金红石型TiO ₂光催化活性的影响。