General modification that utilizes insoluble tungstic acid or highly toxic hydrofluoric acid to improve charge separation and transfer in TiO₂ results in considerable issues such as uneven doping, significant impacts on particle size and morphology, as well as environmental hazards. In the present work, an environmental benign one-pot dual-modification approach was demonstrated that uses soluble sodium tungstate and only trace-level sodium fluoride as replacements. The photoactivity efficiency for decoloration of methylene blue (MB) solution was improved by 33.6% and 119.5% under ultraviolet and visible light, respectively. Meanwhile, the photocurrent density reached an enhancement by 181.2% by this dual-modification. The dual-modification had negligible influence on the crystal structure and the surface area of the TiO₂ nanoparticles. Density functional calculation suggested the remarkable improvements of the photocatalysis of TiO₂ can be ascribed to the rapid charge separation and transfer owing to the down-shift of conduction band from the tungsten doping and localized spatial charge separation from the surface fluorination enabled by the dual-modification approach.

利用不溶性钨酸或剧毒氢氟酸改善 TiO _{2中的电荷分离和转移的一般改性}会导致相当大的问题，例如掺杂不均匀、对颗粒尺寸和形态的显着影响以及环境危害。在目前的工作中，证明了一种环境友好的一锅双改性方法，该方法使用可溶性钨酸钠和仅痕量氟化钠作为替代品。在紫外光和可见光下，亚甲基蓝 (MB) 溶液脱色的光活性效率分别提高了 33.6% 和 119.5%。同时，通过这种双重修饰，光电流密度提高了 181.2%。_{双重改性对TiO 2} 纳米颗粒的晶体结构和表面积的影响可以忽略不计。密度泛函计算表明TiO _{2的光催化性能显着提高}可以归因于快速的电荷分离和转移，这是由于钨掺杂的导带下移和双改性方法实现的表面氟化的局部空间电荷分离。