PVDF/TiO_(2)@Ag杂化纤维膜的制备及光催化性能研究

Preparation of PVDF/TiO_(2)@Ag hybrid fiber membranes and its photocatalytic performance

采用静电纺丝和光化学沉积法制备聚偏氟乙烯(PVDF)/TiO_(2)@Ag杂化纤维膜,并通过扫描电镜(SEM)、X射线衍射(XRD)和紫外分光光度计等对复合粉体的微观形貌、晶体结构和光催化性能等进行测试与分析。结果表明:TiO_(2)的加入能够改变PVDF/TiO_(2)杂化纤维膜的微观形貌,增加纤维膜的粗糙度。当TiO_(2)添加量为30%时,PVDF/TiO_(2)杂化纤维膜的断裂强度和光催化降解能力均达到极大值。PVDF/TiO_(2)@Ag杂化纤维膜的光催化降解能力随着光化学沉积Ag时间的延长呈现先增后减的趋势。在光化学沉积时间为3min时光催化降解能力最强,且Ag的沉积能实现PVDF/TiO_(2)@Ag杂化纤维膜在可见光下的光催化降解。

In this study, PVDF/TiO_(2)@Ag hybrid fiber membranes were prepared by electrospinning and photochemical deposition.The microstructure, crystal structure and photocatalytic performance of hybrid fiber membranes were tested and analyzed by SEM,XRD,UV spectrophotometer and so on.The results showed that: the addition of TiO_(2)changed the microscopic morphology of the PVDF/TiO_(2)hybrid fiber membranes and increased its roughness.When the TiO_(2)content was 30%,the breaking strength and photocatalytic degradation ability of PVDF/TiO_(2)hybrid fiber membranes reached the optimal value.The photocatalytic degradation ability of PVDF/TiO_(2)@Ag hybrid fiber membranes showed a trend of first increase and then decrease with the prolongation of the time of photochemical deposition of Ag.When the photochemical deposition time was 3min, the photocatalytic degradation ability was the strongest, and the deposition of Ag could realize the photocatalytic degradation of PVDF/TiO_(2)@Ag hybrid fiber membrane under visible light.