New, monometallic nanoparticles (MNPs) decorated surface and rare earth (RE) ions doped lattice of perovskite-type (KTaO₃)/pyrochlore-type (K₂Ta₂O₆) photocatalysts were successfully prepared by facile hydrothermal incorporation of RE ions into KTaO₃/K₂Ta₂O₆ lattices followed by photodeposition of MNPs. The impact of noble metal type (MNPs = Au, Pt, Rh) and rare earth dopant type (RE = Er, Pr) on the physicochemical properties correlated with photoactivity of MNPs/RE-KTaO₃ and MNPs/RE-K₂Ta₂O₆ has been examined. All as-prepared photocatalysts were systematically characterized by UV–vis diffuse reflectance spectroscopy, photoluminescence emission spectroscopy, transmission electron microscopy, energy-dispersive X-ray spectroscopy, fast Fourier transform, powder X-ray diffraction, and X-ray photoelectron spectroscopy. The crystal structure was presented using VESTA software. Photocatalytic activity of samples under visible light irradiation was determined by pollutant decomposition, while UV–vis induced activity was estimated by H₂ generation efficiency. The experimental results suggested a synergistic effect between MNPs and RE-ions-modified KTaO₃/K₂Ta₂O₆, which resulted in greatly improved photocatalytic performance compared with that of pristine KTaO₃/K₂Ta₂O₆. Inclusion of RE ions into KTaO₃/K₂Ta₂O₆ lattices probably leads to formation of RE4f states below the conduction band levels to electron transition by lower photon excitation energy, while photoreduction of MNPs on the RE-KTaO₃/RE-K₂Ta₂O₆ surface causes localized surface plasmon resonance and activates surface by adsorption for both O₂ and H₂O molecules. The highest visible-light-induced photoactivity was observed for the Au/Er-KTaO₃ sample (16.48%) in phenol solution degradation and for the Pt/Pr-K₂Ta₂O₆ photocatalyst (36.13%) in gaseous toluene removal, respectively. Active species-trapping tests indicate that O₂⁻ radicals are meaningfully involved in phenol oxidation under visible light irradiation. The largest amount of H₂ evaluation was observed for the Pt/Pr-K₂Ta₂O₆ sample (93.16 µmol/min) under UV–vis irradiation, which also showed a relatively good lifetime in recycling. The present study describes noble- and rare-earth-metal-modified KTaO₃/K₂Ta₂O₆ as an advanced material in photocatalysis.

钙钛矿型（KTaO ₃）/烧绿石型（K ₂ Ta ₂ O ₆）光催化剂的表面修饰和稀土（RE）离子掺杂晶格是通过将稀土离子容易地水热掺入而成功制备的。 KTaO ₃ / K ₂ Ta ₂ O ₆晶格，然后进行MNP的光沉积。贵金属类型（MNPs = Au，Pt，Rh）和稀土掺杂剂类型（RE = Er，Pr）对与MNPs / RE-KTaO ₃和MNPs / RE-K ₂ Ta _2的光活性相关的理化性质的影响Ø ₆已经检查过了。通过紫外可见漫反射光谱，光致发光发射光谱，透射电子显微镜，能量色散X射线光谱，快速傅里叶变换，粉末X射线衍射和X射线光电子能谱系统地表征了所有制备的光催化剂。使用VESTA软件显示晶体结构。可见光照射下样品的光催化活性由污染物的分解决定，而紫外可见诱导的活性则由H _2的产生效率来估计。实验结果表明，MNPs与RE离子修饰的KTaO ₃ / K ₂ Ta ₂ O ₆具有协同作用。与原始KTaO ₃ / K ₂ Ta ₂ O ₆相比，大大改善了光催化性能。将RE离子包含在KTaO ₃ / K ₂ Ta ₂ O ₆晶格中可能会导致在较低的导带能级形成RE4 f态，并通过较低的光子激发能使电子跃迁，同时RE-KTaO ₃ / RE-上的MNP进行光还原。K ₂ Ta ₂ O ₆表面引起局部表面等离子体共振，并通过吸附O ₂和H ₂活化表面O分子。在苯酚溶液降解中，Au / Er-KTaO ₃样品的可见光诱导的光活性最高（16.48％），在除去甲苯中的Pt / Pr-K ₂ Ta ₂ O ₆光催化剂中的可见光诱导的光活性最高（36.13％），分别。活性种捕获测试表明ö ₂ ^-基团切实参与苯酚氧化可见光照射下。对于Pt / Pr-K ₂ Ta ₂ O ₆，观察到的H ₂评估量最大。样品（93.16 µmol / min）在紫外可见光照射下，在循环中也显示出相对较好的使用寿命。本研究描述了贵金属和稀土金属改性的KTaO ₃ / K ₂ Ta ₂ O ₆作为光催化中的高级材料。