摘要
将CdTe量子点(QDs)与聚乙烯醇(PVA)通过溶液共混,利用静电纺丝技术制备出CdTe QDs/PVA复合纳米纤维,通过扫描电子显微镜(SEM)、能量色散X-射线光谱(EDX)、分子荧光分光光度计和倒置荧光显微镜对复合纳米纤维进行微观形貌和荧光性能的研究。结果表明:当PVA含量为10%、CdTe QDs浓度为1.5mmol·L-1时,所制备的CdTe QDs/PVA复合纳米纤维的荧光性能最佳,且纳米纤维表面光滑、尺寸均匀,直径为200nm左右。与溶液浇铸法制得的CdTe QDs/PVA复合薄膜相比,该复合纳米纤维膜的荧光性能有所提高,说明CdTe QDs在复合纳米纤维中具有更好的稳定性和分散性。
CdTe QDs/PVA composite nanofibers were prepared by blending CdTe quantum dots（QDs） with poly（vinyl alcohol）（PVA） solution with the electrospinning technique. Scanning electron microscopy（SEM）, energy dispersive X-ray spectroscopy（EDX）, molecular fluorescence spectrophotometer and inverted fluores- cence microscopy were used to analyze micromorphology and fluorescence performance of CdTe QDs/PVA corn posite nanofibers. It was found that,CdTe QDs/PVA composite nanofibers showed the best fluorescence performance when mixing 10% PVA and 1.5 mmol· L^-1 CdTe QDs,and the surfaces of nanofibers were smooth, diameters were uniform of about 200 nm. Comparing with CdTe QDs/PVA composite thin film obtained by solution casting, the composite nanofiber membrane showed better fluorescence performance. It indicated that CdTe QDs in composite nanofibers had better stability and dispersity than the thin film obtained by solution casting.
出处
《化学与生物工程》
CAS
2017年第4期34-38,共5页
Chemistry & Bioengineering
基金
湖北省自然科学基金重点项目(ZRZ2014000060)
关键词
量子点
聚合物
静电纺丝
纳米纤维
荧光性能
quantum dots
polymer
electrospinning
nanofiber
fluorescence performance
