Preparation and application of amino functionalized mesoporous nanofiber membrane via electrospinning for adsorption of Cr3~ from aqueous solution

• Published in: Journal of environmental sciences (China) 2012-04, Vol.24 (4), p.610-616
• Main Authors: Taha, Ahmed A., Qiao, Junlian, Li, Fengting, Zhang, Bingru
• Format: Article
• Language: English
• Subjects: Adsorption; Amines - chemistry; amino groups; Chromium - isolation & purification; Cr3; Electrospinning; Ions; Membranes; Membranes, Artificial; mesoporous; Microscopy, Electron, Transmission; Nanocomposites; nanofiber; Nanofibers - chemistry; Nanofibers - ultrastructure; Nanomaterials; Nanostructure; Nitrogen - chemistry; Porosity; Scanning electron microscopy; Solutions; Spectroscopy, Fourier Transform Infrared; Surface chemistry; Time Factors; Water Pollutants, Chemical - isolation & purification; Water Purification - methods; X-Ray Diffraction; 介孔; 氨基; 水溶液; 纳米纤维膜; 膜制备; 阳离子表面活性剂; 静电吸附
• ISSN: 1001-0742; 1878-7320
• DOI: 10.1016/S1001-0742(11)60806-1

Novel amino （-NH2） functionalized mesoporous polyvinyl pyrrolidone （PVP）/SiO2 composite nanofiber membranes were fabricated by a one-step electrospinning method using poly （vinyl alcohol） and tetraethyl orthosilicate （TEOS） mixed with cationic surfactant, cety｜trimethyl ammonium bromide （CTAB） as the structure directing agent. Ureidopropyltriethoxysilane was used for functionalization of the internal pore surfaces. The membranes were characterized by scanning electron microscopy （SEM）, high-resolution transmission electron microscopy （HRTEM） images, X-ray diffraction （XRD）, Fourier-transform infrared spectroscopy （FT-IR）, element analyzer and Nz adsorption-desorption isotherms, The nanofiber diameters, average pore diameters and surface areas were 100-700 nm, 2.86 nm and 873,62 m2/g, respectively. These mesoporous membranes functionalized with -NH2 groups exhibited very high adsorptions properties based on the adsorption of Cr3＋ from an aqueous solution. Equilibrium adsorption was achieved after approximately 20 rain and more than 97% of chronium ions in the solution were removed. The membrane could be regenerated through acidification.