Losada-Garcia Noelia, Carranza Jannier, Palomo Jose M
Instituto de Catálisis y Petroleoquímica (ICP), CSIC, Marie Curie 2, 28049 Madrid, Spain.
Nanomaterials (Basel). 2023 Jan 21;13(3):449. doi: 10.3390/nano13030449.
In this work, CuO nanoparticles (NPs) were created in situ on graphene functionalized with lipase (G@TLL) where site-oriented supported TLL acted as template and binder in the presence of copper salt by tailorable synthesis under mild conditions, producing a heterogeneous catalyst. CuO NPs were confirmed by XRD and XPS. The TEM microscopy showed that the nanoparticles were homogeneously distributed over the G@TLL surface with sizes of 53 nm and 165 nm. This hybrid was successfully used in the degradation of toxic organic compounds such as trichloroethylene (TCE) and Rhodamine B (RhB). In the case of TCE, the hybrid presented a high catalytic capacity, degrading 60 ppm of product in 60 min in aqueous solution and room temperature without the formation of other toxic subproducts. In addition, a TOF value of 7.5 times higher than the unsupported counterpart (TLL-CuO) was obtained, demonstrating the improved catalytic efficiency of the system in the solid phase. The hybrid also presented an excellent catalytic performance for the degradation of Rhodamine B (RhB) obtaining a complete degradation (48 ppm) in 50 min in aqueous solution and room temperature and with the presence of a green oxidant as HO.
在本工作中，通过在温和条件下进行可定制合成，在脂肪酶功能化的石墨烯（G@TLL）上原位生成了氧化铜纳米颗粒（NPs），其中位点定向负载的TLL在铜盐存在下充当模板和粘合剂，从而制备出一种非均相催化剂。通过XRD和XPS对CuO NPs进行了确认。透射电子显微镜（TEM）显示，纳米颗粒均匀分布在G@TLL表面，尺寸分别为53 nm和165 nm。这种杂化物成功用于降解三氯乙烯（TCE）和罗丹明B（RhB）等有毒有机化合物。对于TCE，该杂化物表现出高催化能力，在水溶液和室温下60分钟内可降解60 ppm的产物，且不会形成其他有毒副产物。此外，获得的TOF值比无载体对应物（TLL-CuO）高7.5倍，证明了该体系在固相中催化效率的提高。该杂化物对罗丹明B（RhB）的降解也表现出优异的催化性能，在水溶液和室温下，在绿色氧化剂HO存在的情况下，50分钟内可实现完全降解（48 ppm）。
