Aitbella Hicham, Belachemi Larbi, Merle Nicolas, Zinck Philippe, Kaddami Hamid
IMED-Lab, Team of Organometallic and Macromolecular Chemistry-Composite Materials, Department of Chemical Sciences, Faculty of Science and Technology, Cadi Ayyad University, Marrakech 40000, Morocco.
Unité de Catalyse et Chimie du Solide, UMR 8181, University Lille, CNRS, Centrale Lille, University Artois, F-59650 Villeneuve d'Ascq, France.
Molecules. 2024 Apr 11;29(8):1734. doi: 10.3390/molecules29081734.
A new hybrid catalyst consisting of cobalt nanoparticles immobilized onto cellulose was developed. The cellulosic matrix is derived from date palm biomass waste, which was oxidized by sodium periodate to yield dialdehyde and was further derivatized by grafting orthoaminophenol as a metal ion complexing agent. The new hybrid catalyst was characterized by FT-IR, solid-state NMR, XRD, SEM, TEM, ICP, and XPS. The catalytic potential of the nanocatalyst was then evaluated in the catalytic hydrogenation of 4-nitrophenol to 4-aminophenol under mild experimental conditions in aqueous medium in the presence of NaBH at room temperature. The reaction achieved complete conversion within a short period of 7 min. The rate constant was calculated to be K = 8.7 × 10 s. The catalyst was recycled for eight cycles. Furthermore, we explored the application of the same catalyst for the hydrogenation of cinnamaldehyde using dihydrogen under different reaction conditions. The results obtained were highly promising, exhibiting both high conversion and excellent selectivity in cinnamyl alcohol.
开发了一种由固定在纤维素上的钴纳米颗粒组成的新型杂化催化剂。纤维素基质源自枣椰树生物质废料，其经高碘酸钠氧化生成二醛，并通过接枝邻氨基酚作为金属离子络合剂进一步衍生化。通过傅里叶变换红外光谱（FT-IR）、固态核磁共振（NMR）、X射线衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、电感耦合等离子体质谱（ICP）和X射线光电子能谱（XPS）对新型杂化催化剂进行了表征。然后在室温下于水性介质中、在硼氢化钠（NaBH）存在的温和实验条件下，评估了该纳米催化剂在4-硝基苯酚催化加氢制备4-氨基苯酚中的催化潜力。该反应在短短7分钟内实现了完全转化。计算得出的速率常数为K = 8.7 × 10 s。该催化剂循环使用了八次。此外，我们还探索了在不同反应条件下使用氢气，将该催化剂应用于肉桂醛加氢反应。所得结果非常有前景，在肉桂醇中表现出高转化率和优异的选择性。
