Fischer Daiane K, Fraga Karina R de, Scheeren Carla W
Laboratory of Catalysis, School of Chemistry and Food, Universidade Federal do Rio Grande - FURG, Rua Barão do Caí, 125, CEP 95500-000, Santo Antônio da Patrulha, RS, Brazil.
J Nanosci Nanotechnol. 2020 Feb 1;20(2):1296-1302. doi: 10.1166/jnn.2020.16964.
Palladium nanoparticles (Pd NPs) (ca. 4.8 nm) were synthesized from Palladium acetylacetonate [Pd(acac)₂] using ionic liquids 1--butyl-3-methylimidazolium hexafluorophosphate [BMI.PF] or 1--butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide [BMI.N(Tf)₂] as stabilizing agents. The catalyst named Pd NPs/IL/Chitosan, was characterized and analyzed by the different techniques, such as X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM/EDS), infrared (IR) and Brunauer-Emmett-Teller (BET) method (BET), to evaluate the composition of the material as well as the texture, size, distribution, homogeneity, structure and surface area. The catalyst Pd NPs/IL/Chitosan exhibited high catalytic activity in the hydrogenation reactions, when compared to Pd NPs not supported; this fact is related possibly to the large surface area and the durability and stability provided by the support of the biopolymer in combination with ionic liquids.
使用离子液体1-丁基-3-甲基咪唑六氟磷酸盐[BMI.PF]或1-丁基-3-甲基咪唑双（三氟甲基磺酰基）亚胺[BMI.N(Tf)₂]作为稳定剂，从乙酰丙酮钯[Pd(acac)₂]合成了钯纳米颗粒（Pd NPs）（约4.8纳米）。通过不同技术对名为Pd NPs/IL/壳聚糖的催化剂进行了表征和分析，如X射线衍射（XRD）、透射电子显微镜（TEM）、带能谱的扫描电子显微镜（SEM/EDS）、红外（IR）和布鲁诺尔-埃米特-泰勒（BET）方法（BET），以评估材料的组成以及质地、尺寸、分布、均匀性、结构和表面积。与未负载的Pd NPs相比，催化剂Pd NPs/IL/壳聚糖在氢化反应中表现出高催化活性；这一事实可能与大表面积以及生物聚合物载体与离子液体结合提供的耐久性和稳定性有关。
