In this study, several TiO₂ mesoporous nanoparticles with different mol% of niobium and silver were synthesized using the sol–gel method. The crystalline phase, chemical state, photocatalytic and optical properties, specific surface area, and morphology of mesoporous nanoparticles were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), UV–Vis reflective spectroscopy (UV–Vis), Brunauer–Emmett–Teller-specific surface area (BET) and field emission scanning electron microscopy (FESEM). With increasing calcination temperature, the photocatalytic activity of the samples gradually increased due to the improvement of crystallization of the anatase and rutile phases. Nb/Ag codoping sample calcined at 550 °C has reduced the band gap energy (3.17 eV to 3.06 eV) and improved the photocatalytic properties of samples under visible light (xenon lamp, 200 W for 1 h and 2 h). Doped TiO₂ mesoporous nanoparticles were shown to have the highest photocatalytic activity as compared with the pure TiO₂ nanoparticles. The best photocatalytic efficiency of codoped TiO₂ mesoporous nanoparticles was observed for the TNA3 sample calcined under 550 °C, containing molar contents of Nb (0.5 mol%) and Ag (1 mol%) dopant ions with 95.60% efficiency.

在这项研究中，几种TiO ₂使用溶胶-凝胶法合成了具有不同摩尔％的铌和银的中孔纳米粒子。通过X射线衍射（XRD），X射线光电子能谱（XPS），UV-Vis反射光谱（UV-Vis）表征了介孔纳米粒子的结晶相，化学状态，光催化和光学性质，比表面积和形态），Brunauer-Emmett-Teller比表面积（BET）和场发射扫描电子显微镜（FESEM）。随着煅烧温度的升高，由于锐钛矿和金红石相结晶的改善，样品的光催化活性逐渐提高。在550°C下煅烧的Nb / Ag共掺杂样品降低了带隙能（3.17 eV至3.06 eV），并改善了样品在可见光下（氙灯，200 W，持续1 h和2 h）。掺杂二氧化钛与纯TiO ₂纳米颗粒相比，_2个介孔纳米颗粒具有最高的光催化活性。对于在550°C下煅烧的TNA3样品，共掺杂的TiO ₂介孔纳米粒子具有最佳的光催化效率，该样品包含摩尔含量的Nb（0.5 mol％）和Ag（1 mol％）掺杂离子，效率为95.60％。