摘要
以溶胶-凝胶法为基础,利用静电纺丝法制备了PVP/SiO2复合纳米纤维膜,然后分别经500℃、600℃和700℃的高温煅烧制得无机SiO2纳米纤维膜。利用热重分析仪(TGA)和傅里叶红外变换光谱仪(FT-IR)分别探讨了PVP/SiO2复合纳米纤维的热降解过程和煅烧前后复合纳米纤维膜的官能团变化;用扫描电子显微镜(SEM)观察了煅烧前PVP/SiO2复合纳米纤维膜与煅烧后SiO2纳米纤维膜的结构形貌变化,采用紫外可见分光光度计研究了不同温度下的SiO2纳米纤维膜对废水中亚甲基蓝染料的吸附脱色性能。测试结果表明制备的SiO2纳米纤维膜具有均匀的纤维直径分布和优异的孔径结构,对废水中亚甲基蓝染料具有良好的吸附脱色作用。
The PVP/SiO2 composite nanofibers were prepared based on sol-gel and electrospinning techniques. Then SiO2 nanofibrous mats were made from the PVP/SiO2 composite nanofibers through calcination at 500℃, 600 ℃ and 700 ℃, respectively. The thermal degradation process of composite nanofibers was characterized by thermogravimetric analysis （TGA）, and the change of characteristic groups of composite nanofibers before and after calcination was analyzed by FT-IR spectra. The structural morphology of PVP/SiO2 composite nanofibers and SiO2 nanofibrous mats were observed by scanning electron microscopes （SEM）. The absorbed decolorization property of SiO2 nanofibrous mats on methylene blue dye in waste water was investigated by ultraviolet-visible spectroscopy. The results indicated that fabricated SiO2 nanofibrous mats possessed homogenous fiber diameter and excellent porous structure, and had excellent absorbed decolorization function on methylene blue dye in waste water.
基金
中国博士后科学基金(2014M560391)
江南大学大学生创新训练计划(2013037)
国家自然科学基金(51006046)
国家高技术研究发展计划(2012AA030313)
