It is established that the change in molar ratio (X) of NH₄(HF₂) and Ti(BuO)₄ precursors in the reaction mixture affects the crystallite sizes of the prepared co-doped C,N,F-TiO₂ nanostructures, their S_BET, S_meso, interstitial carbon content and photocatalytic activity in the doxycycline photodegradation processes under UV light irradiation. At small X (X ≤ 0.05) co-doped anatase/brookite heterostructures with the highest photocatalytic activity are formed under visible light irradiation.

中文翻译：

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C,N,F-TiO2纳米结构制备条件对其多西环素光降解过程光催化活性的影响

_{已经确定反应混合物中NH 4} (HF ₂ )和Ti(BuO) ₄前体的摩尔比(X)的变化影响制备的共掺杂C,N,F-TiO ₂纳米结构的微晶尺寸，紫外光照射下多西环素光降解过程中的 S _BET、 S _{meso 、间隙碳含量和光催化活性。}在小 X (X ≤ 0.05) 处，在可见光照射下形成具有最高光催化活性的共掺杂锐钛矿/板钛矿异质结构。