Canakkale Onsekiz Mart University, Faculty of Sciences and Arts, Chemistry Department, Canakkale, Turkey.
J Colloid Interface Sci. 2012 May 1;373(1):122-8. doi: 10.1016/j.jcis.2011.08.080. Epub 2011 Sep 3.
Various metal nanoparticles such as, Cu, Co, Ni, and Fe were prepared inside poly(1-vinyl imidazole) p(VI) hydrogel by the absorption of the corresponding metal ions from aqueous solutions and the reduction with suitable reducing agents such as NaBH(4) and/or NaOH. TGA and ICP-AES were used to determine the metal particle content of p(VI)-M (M: Cu, Co, and Ni) composites. The prepared hydrogel-metal nanoparticle composites were proven to be resourceful as reaction container for the catalysis of various organic reactions. It was illustrated that p(VI)-M hydrogel-metal composites can be successfully used in the hydrolysis of NaBH(4) for the generation hydrogen form NaBH(4) and NH(3)BH(3). Additionally, p(VI)-M composites were also illustrated in the catalysis of different organic reactions; e.g., these hydrogel-M are very effective in the reduction nitro aromatic compounds such 2-nitrophenol (2-NP) and 4-nitrophenol (4-NP) to their corresponding amine forms in the presence of aqueous NaBH(4). Various parameters in the catalysis of hydrogen production and 4-NP reduction were determined.
各种金属纳米粒子，如 Cu、Co、Ni 和 Fe，通过从水溶液中吸收相应的金属离子，并使用合适的还原剂如 NaBH4和/或 NaOH 进行还原，被制备到聚（1-乙烯基咪唑）p（VI）水凝胶中。TGA 和 ICP-AES 用于确定 p（VI）-M（M：Cu、Co 和 Ni）复合材料中的金属颗粒含量。已经证明，所制备的水凝胶-金属纳米粒子复合材料作为各种有机反应的催化反应容器非常有用。说明 p（VI）-M 水凝胶-金属复合材料可以成功地用于 NaBH4的水解，以从 NaBH4和 NH3BH3中生成氢气。此外，p（VI）-M 复合材料也在不同有机反应的催化中得到了说明；例如，这些水凝胶-M 在存在水合 NaBH4的情况下，非常有效地将硝基芳香族化合物如 2-硝基苯酚（2-NP）和 4-硝基苯酚（4-NP）还原为其相应的胺形式。确定了在氢气生成和 4-NP 还原催化中的各种参数。
