Developing nonmetal-doped mesoporous TiO2 is highly attractive for preparing semiconductor visible photocatalyst with high activities. Here, we prepare N/F co-doped mesoporous TiO2 with high vis-photocatalytic activities by a simple liquid phase deposition process followed by annealing in air using C[Formula: see text]TAB as a bi-functional template (forming mesoporous and providing dopants). N2 adsorption isotherms, low-angle X-ray diffraction (XRD) and transmission electron microscopy (TEM) indicate the formation of wormhole-like mesoporous structure. Wide-angle XRD and high-resolution TEM demonstrate the presence of anatase TiO2 mesopore wall. XPS analyses reveal that N is doped into TiO2 lattice in the forms of substitutional and interstitial N species, and that F is doped into the TiO2 lattice in the form of interstitial F. The mesopore-forming and doping mechanisms are thoroughly discussed based on the bi-function of C[Formula: see text]TAB template. Mesoporous structure results in a high BET surface area of TiO2. High-concentration nitrogen species in anatase lattice and mesoporous structure remarkably increase the visible absorption of TiO2. As a result, the reaction rate constant of MB degradation catalyzed by N/F co-doped mesoporous TiO2 photocatalysts is about 7 times that by P25.

中文翻译：

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基于双功能模板的 N/F 共掺杂介孔 TiO2 相对光催化剂的简便制备

开发非金属掺杂的介孔二氧化钛2对于制备具有高活性的半导体可见光催化剂非常有吸引力。在这里，我们制备了 N/F 共掺杂的介孔 TiO2通过简单的液相沉积过程，然后使用 C[公式：参见文本]TAB 作为双功能模板（形成中孔并提供掺杂剂）在空气中退火，具有高可见光催化活性。ñ2吸附等温线、低角 X 射线衍射 (XRD) 和透射电子显微镜 (TEM) 表明虫洞状介孔结构的形成。广角 XRD 和高分辨率 TEM 证明锐钛矿 TiO2 的存在2中孔壁。XPS 分析表明，N 掺杂到 TiO2 中2晶格以取代和间隙 N 物种的形式存在，并且 F 掺杂到 TiO2 中2以间隙F形式的晶格。基于C[公式：见文本]TAB模板的双功能，对中孔形成和掺杂机制进行了深入讨论。介孔结构导致二氧化钛的高 BET 表面积2. 锐钛矿晶格和介孔结构中的高浓度氮物种显着增加了 TiO2 的可见光吸收2. N/F共掺杂介孔二氧化钛催化MB降解的反应速率常数2光触媒的用量约为 P25 的 7 倍。