Li Xianxue, Odoom-Wubah Tareque, Huang Jiale
College of Environmental and Biological Engineering, Fujian Provincial Key Laboratory of Ecology-Toxicological Effects & Control for Emerging Contaminants, Putian University Putian Fujian 351100 P. R. China.
Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University Xiamen 361005 P. R. China
RSC Adv. 2018 Aug 28;8(53):30340-30345. doi: 10.1039/c8ra04301a. eCollection 2018 Aug 24.
We report a simple but efficient biological route based on the hydrolysis of cellulose to synthesize Ag-Pd alloy nanoparticles (NPs) under hydrothermal conditions. X-ray powder diffraction, ultraviolet-visible spectroscopy and scanning transmission electron microscopy-energy dispersive X-ray analyses were used to study and demonstrate the alloy nature. The microscopy results showed that well-defined Ag-Pd alloy NPs of about 59.7 nm in size can be biosynthesized at 200 °C for 10 h. Fourier transform infrared spectroscopy indicated that, triggered by silver sulfate, cellulose was hydrolyzed into saccharides or aldehydes, which served as both reductants and stabilizers, and accounted for the formation of the well-defined Ag-Pd NPs. Moreover, the as-synthesized Ag-Pd nanoalloy showed high activity in the catalytic reduction of 4-nitrophenol by NaBH.
我们报道了一种简单而有效的生物途径，该途径基于纤维素的水解，在水热条件下合成银钯合金纳米颗粒（NPs）。采用X射线粉末衍射、紫外可见光谱和扫描透射电子显微镜-能量色散X射线分析来研究和证明合金的性质。显微镜结果表明，在200℃下反应10小时，可以生物合成尺寸约为59.7nm的明确定义的银钯合金纳米颗粒。傅里叶变换红外光谱表明，在硫酸银的触发下，纤维素水解成糖类或醛类，它们既是还原剂又是稳定剂，并解释了明确定义的银钯纳米颗粒的形成。此外，合成的银钯纳米合金在硼氢化钠催化还原4-硝基苯酚的反应中表现出高活性。
