静电纺丝法制备ZnO纳米纤维及其光催化性能的研究

Preparation and Photo-catalytic Characterization of ZnO Nanofibers by Electrospinning

以聚乙烯醇作为络合剂与醋酸锌反应制得纺丝液,采用静电纺丝法制得聚乙烯醇/醋酸锌复合纤维,经煅烧后得到直径为100 nm的纯ZnO无机纳米纤维.对所制得的纳米纤维的结晶度、纯度和表面形貌,分别采用X射线粉末衍射、差热-热重分析(TG-DTA)、红外光谱(IR)、扫描电镜(SEM)等分析测试手段进行表征.光降解亚甲基蓝水溶液的实验结果表明,700℃下煅烧得到的ZnO纳米纤维,紫外光照60 min使质量浓度为20 mg/L亚甲基蓝溶液的脱色率达99%,ZnO纳米颗粒对亚甲基蓝脱色率为84%,这充分说明ZnO纳米纤维具有良好的光催化性能.

PVA/zinc acetate composite fibers were prepared using sol-gel processing and electrospinning technique. The pure inorganic ZnO nanofibers with a diameter of 100 nm were obtained after the precursor fibers were calcined at 700℃. ZnO nanofibers were characterized by XRD, TG-DTA, FT-IR and SEM, respectively. The results showed that methylene blue was mineralized in aqueous containing ZnO nanofibers upon radiation with ultraviolet light and the mineralization rate was close to 99% at 60 min. ZnO nanofibers have a better photocatalytic property than that of ZnO nanoparticles for degradation of methylene blue.