Abstract Co2+ and F– are doped into lattice of TiO2 powders, and the effects on charge trapping, recombination, and interface transfer are systematically researched. Double doped TiO2 photocatalyst was introduced on Graphene oxide, to construct heterojunction for photocatalytic denitrification of fuel containing pyridine (PY), indole (IND), and quinoline (QUI). A significant improvement in the photocatalytic activity was detected with the double doped modified heterojunction photocatalyst as compared to the pure TiO2. The reason for the improvement of the photocatalytic denitrification performance of oil may be derived from that the doped metal ions and nonmetal ions capture charge carriers to provide an alternative pathway for interface charge transfer, decreased the band gap width and the energy required for the transition, and caused the red shift in the light response range. On the other hand, catalyst supported on RGO, not only accelerated the transfer of photogenic carriers, improved the life of catalytic active component, but also enhanced the dispersibility of catalyst in oil. The experimental results showed that the activity and reusability of the photocatalyst denitrification performance was found satisfactory. On this basis, it is indicated that Co2+/F–/TiO2-RGO can be prospective materials for catalytic denitrification of oil. GRAPHICAL ABSTRACT

中文翻译：

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负载在 RGO 上的 M-TiO2 (M = Co2+ & F-) 纳米粒子在光催化脱氮性能中的作用

摘要 Co2+和F-掺杂到TiO2粉末的晶格中，系统地研究了其对电荷俘获、复合和界面转移的影响。在氧化石墨烯上引入双掺杂二氧化钛光催化剂，构建异质结，用于含吡啶（PY）、吲哚（IND）和喹啉（QUI）燃料的光催化脱硝。与纯 TiO2 相比，双掺杂改性异质结光催化剂检测到光催化活性的显着提高。油光催化反硝化性能提高的原因可能是由于掺杂的金属离子和非金属离子捕获了电荷载流子，为界面电荷转移提供了替代途径，降低了带隙宽度和跃迁所需的能量，并引起光响应范围内的红移。另一方面，负载在RGO上的催化剂不仅加速了光生载体的转移，提高了催化活性组分的寿命，而且增强了催化剂在油中的分散性。实验结果表明，光触媒脱硝性能的活性和可重复使用性令人满意。在此基础上，表明 Co2+/F-/TiO2-RGO 可以作为石油催化脱硝的潜在材料。图形概要 实验结果表明，光触媒脱硝性能的活性和可重复使用性令人满意。在此基础上，表明 Co2+/F-/TiO2-RGO 可以作为石油催化脱硝的潜在材料。图形概要 实验结果表明，光触媒脱硝性能的活性和可重复使用性令人满意。在此基础上，表明 Co2+/F-/TiO2-RGO 可以作为石油催化脱硝的潜在材料。图形概要