Yaoxian Li

A convenient route to polyvinyl pyrrolidone/silver nanocomposite by electrospinning

Silver nanoparticles prepared through reduction of AgNO3 by ethanol under refluxing conditions in polyvinyl pyrrolidone (PVP) ethanol solution were dispersed into PVP nanofibre film by electrospinning. The optical properties of Ag nanoparticles in PVP ethanol solution were measured by ultraviolet–visible (UV–vis) spectroscopy. The presence of face-centred cubic (fcc) crystalline silver embedded in PVP nanofibre film was indicated by the x-ray diffractometer (XRD) pattern. The morphology and distribution of silver nanoparticles in PVP nanofibres were observed by transmission electron microscopy (TEM). The interaction between PVP and Ag nanoparticles was confirmed by the x-ray photoelectron spectrum (XPS). In addition, Ag/PVP nanocomposite film was characterized by the surface enhanced Raman scattering (SERS) spectrum.

Synthesis of AgCl/PAN composite nanofibres using an electrospinning method

A new route based on electrospinning is designed for the preparation of silver chloride/polyacrylonitrile (AgCl/PAN) composite nanofibres. The AgCl nanoparticles uniform in size, were dispersed on the surfaces of the composite nanofibres. Transmission electron microscopy (TEM) images gave direct evidence of the structure. X-ray photoelectron spectroscopy (XPS) and x-ray diffraction (XRD) confirmed the presence of AgCl crystals.

(S)‐N‐(1H‐Tetra­zol‐5‐ylmeth­yl)pyrrolidine‐2‐carboxamide dihydrate

In the title compound, C7H12N6O·2H2O, all bond lengths and angles show normal values. The pyrrolidine ring adopts a C1–Cγ-endo conformation. An extensive network of N—H⋯O and O—H⋯O hydrogen bonds stabilizes the crystal packing.