Gansu Key Laboratory for Environmental Pollution Prediction and Control, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China.
Center of Eco-materials and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China.
Carbohydr Polym. 2017 Feb 20;158:44-50. doi: 10.1016/j.carbpol.2016.12.004. Epub 2016 Dec 5.
A facile method was reported to achieve hollow-tubular-oriented polydopamine (HTO-PDA) layer using natural kapok fiber (KF) as the bio-template without any pretreatments by altering hydrophobic fiber into hydrophilic one. Subsequently, the HTO-PDA can be utilized for direct in-situ deposition of Ag nanoparticles (NPs). The structures of pristine fiber and HTO-PDA, as well as the resulting Ag NPs attached HTO-PDA (Ag@HTO-PDA) were well characterized by means of scanning electron microscopy (SEM) coupled energy dispersion spectrum (EDS), x-ray diffraction (XRD), transmission electron microscopy (TEM), thermogravimetric analysis (TGA) and Fourier transform infrared (FTIR) spectroscopy. Due to the presence of relatively uniform Ag NPs attached onto PDA layer, Ag@KF-HTO-PDA shows stable catalytic ability towards the reduction of 4-nitrophenol into its amino derivative. Further, this method was used for facile fabrication of Calotropis gigantea fiber derived, surface-functionalized material. The experimental data demonstrated also its excellent catalytic efficiency towards 4-nitrophenol reduction.
报道了一种简便的方法，使用天然木棉纤维（KF）作为生物模板，无需任何预处理，通过将疏水性纤维变为亲水性纤维来实现中空管状取向的聚多巴胺（HTO-PDA）层。随后，可以利用 HTO-PDA 直接进行原位沉积 Ag 纳米粒子（NPs）。通过扫描电子显微镜（SEM）结合能量色散谱（EDS）、X 射线衍射（XRD）、透射电子显微镜（TEM）、热重分析（TGA）和傅里叶变换红外（FTIR）光谱对原始纤维和 HTO-PDA 以及附着在 HTO-PDA 上的 Ag NPs（Ag@HTO-PDA）的结构进行了很好的表征。由于相对均匀的 Ag NPs 附着在 PDA 层上，Ag@KF-HTO-PDA 对 4-硝基苯酚还原为其氨基衍生物表现出稳定的催化能力。此外，该方法还用于简便地制备表面功能化的 Calotropis gigantea 纤维衍生材料。实验数据还表明，其对 4-硝基苯酚还原具有优异的催化效率。
