Poly(vinyl alcohol) electrospun nanofibrous membrane modified with spirolactam–rhodamine derivatives for visible detection and removal of metal ions
作者： Jianhua Zhang , Liandong Deng , Siyu Wu , Junyu He , Anjie Dong
DOI: 10.1039/C4RA07505F
关键词:
摘要: Poly(vinyl alcohol) electrospun nanofibrous (PVANF) membranes that could sensitively detect and adsorb metal ions were modified with spirolactam–rhodamineine derivatives (PVANF–SRD) sulfo-spirolactam–rhodamine (PVANF–SSRD) membranes. Surface chemistry morphology during functionalization of PVANF monitored using Fourier transform-infrared spectroscopy (FT-IR), X-ray photoelectron (XPS) scanning electron microscopy (SEM). These two display real-time sensing by the naked eye based on ring-opening reaction spirolactam–rhodamine induced corresponding metals. PVANF–SRD PVANF–SSRD exhibited high selectivity sensitivity toward Fe3+/Cr3+ Hg2+, respectively. In terms membranes, adsorption capacity for Hg2+ in contaminated water was studied. Freundlich isotherm better describe interactions than Langmuir: Kf = 7.0175 mg g−1 (r2 0.9996) Hg2+. The regenerability these investigated via Na4EDTA solution treatment, results demonstrated good sustainability detection efficiency.
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