This work reports the solvothermal synthesis of a titanium-based metal organic framework (NH₂-MIL-125(Ti)) and the further deposition of palladium, platinum and silver nanoparticles on its framework, with the aim to obtain visible light-driven photocatalysts. The structure of the NH₂-MIL-125 was not affected by the incorporation of the metal nanoparticles, while the textural properties changed depending on the metal used. All M/NH₂-MIL-125 (M = Pd, Pt, Ag) synthesized materials showed enhanced light absorption in the visible region due to the effect of the metal nanoparticles, which were mainly in reduced state as confirmed by XPS analyses. The metal nanoparticles were between 1.8 and 3.8 nm in size depending of the metal. They were responsible for the reduction in the recombination process, as suggested by photoluminescence measurements. The photocatalytic performance of M/NH₂-MIL-125 was tested for the degradation of acetaminophen (ACE) under simulated solar irradiation. Pt/NH₂-MIL-125 achieved the highest conversion rate (rate constant of 0.0165 min⁻¹), with complete conversion of the contaminant in less than three hours. Scavengers studies confirmed that O₂⁻ radicals play a main role in the degradation process, followed by OH radicals. The catalytic stability of Pt/NH₂-MIL-125 was confirmed upon three successive reaction cycles. Different water matrices were tested to understand the effect of common inorganic ions, being the presence of bicarbonates the most detrimental to the performance of the photocatalytic process.

这项工作报告了溶剂热合成钛基金属有机骨架（NH ₂ -MIL-125（Ti））以及钯，铂和银纳米粒子在其骨架上的进一步沉积，目的是获得可见光驱动的光催化剂。NH ₂ -MIL-125的结构不受金属纳米颗粒掺入的影响，而结构特性则根据所使用的金属而变化。全部M / NH ₂-MIL-125（M = Pd，Pt，Ag）合成材料由于金属纳米颗粒的作用而在可见光区域显示出增强的光吸收，如XPS分析所证实的，金属纳米颗粒主要处于还原状态。取决于金属，金属纳米颗粒的尺寸在1.8至3.8nm之间。如光致发光测量所表明的，它们负责重组过程的减少。测试了M / NH ₂ -MIL-125的光催化性能，以模拟模拟太阳辐射下对乙酰氨基酚（ACE）的降解。Pt / NH ₂ -MIL-125达到了最高的转化率（速率常数为0.0165 min ^-1），并且在不到三小时的时间内就完成了污染物的完全转化。清道夫研究证实O ₂⁻自由基在降解过程中起主要作用，其次是OH自由基。在三个连续的反应循环中证实了Pt / NH ₂ -MIL-125的催化稳定性。测试了不同的水基质以了解常见无机离子的作用，因为碳酸氢盐的存在对光催化过程的性能最不利。