Centro de Química, Instituto de Ciencias, Benemérita Universidad Autónoma de Puebla, Ciudad Universitaria, Edif. IC7, 72570, Puebla, Mexico.
Environ Sci Pollut Res Int. 2023 Jun;30(30):75089-75103. doi: 10.1007/s11356-023-27490-4. Epub 2023 May 22.
The photocatalytic decomposition of caffeine under UV-light irradiation was observed for the first time in a matrix of synthetic urine using granules of hydrogenated and iron-exchanged natural zeolite, coated with two loadings of TiO. A natural clinoptilolite-mordenite blend was used to prepare photocatalytic adsorbents coated with TiO nanoparticles. The performance of the obtained materials was tested in the photodegradation of caffeine, a water contaminant of emerging concern. The photocatalytic activity was better in the urine matrix, due to the formation of surface complexes on the TiO coating, cation exchange performed by the zeolite support, and use of the carrier electrons in the reduction of ions, affecting recombination of the electrons and holes during photocatalysis. The composite granules maintained photocatalytic activity for at least four cycles, with more than 50% of caffeine removal in the synthetic urine matrix.
首次在合成尿液基质中观察到在 UV 光照射下咖啡因的光催化分解，使用氢化和铁交换的天然沸石颗粒作为载体，负载两层 TiO。使用天然斜发沸石-丝光沸石混合物制备负载 TiO 纳米颗粒的光催化吸附剂。用所得材料在光降解咖啡因（一种新兴关注的水污染污染物）中测试其性能。由于 TiO 涂层表面形成配合物、沸石载体进行阳离子交换以及载体电子在离子还原中起作用，光催化活性在尿液基质中更好，这影响了光催化过程中电子和空穴的复合。复合颗粒在至少四个循环中保持光催化活性，在合成尿液基质中去除了超过 50%的咖啡因。
