自支撑PAN/Cd_(0.8) Zn_(0.2) S/MgIn_(2)S_(4)复合纳米纤维膜的制备及光催化性能

Preparation and photocatalytic properties of self-supportingpolyacrylonitrile/Cd_(0.8) Zn_(0.2) S/MgIn_(2)S_(4) nanofiber membrane

采用静电纺丝和溶剂热相结合的方法制备了PAN/Cd_(0.8)Zn_(0.2)S/MgIn_(2)S_(4)复合纳米纤维膜,利用DRS、SEM、XRD和电化学测试等表征样品的晶体结构、光学特性和形貌等。通过模拟可见光降解罗丹明B测定了PAN/Cd_(0.8)Zn_(0.2)S/MgIn_(2)S_(4)复合纳米纤维膜的光催化活性。结果表明,相比于PAN/Cd_(0.8)Zn_(0.2)S和PAN/MgIn_(2)S_(4),PAN/Cd_(0.8)Zn_(0.2)S/MgIn_(2)S_(4)复合纳米纤维膜展示出了最佳的光催化降解性能,在120min时降解效率可达到96%。制备的PAN/Cd_(0.8)Zn_(0.2)S/MgIn_(2)S_(4)复合纳米纤维膜相比于粉状的半导体光催化剂具备良好的柔性和自支撑性能,在实际应用中易于回收,且可避免二次污染。

Polyacrylonitrile (PAN)/Cd_(0.8) Zn_(0.2) S/MgIn_(2)S_(4) composite nanofiber membrane was prepared by electrospinning and solvothermal methods. The crystal structure, optical properties and morphology of the samples were characterized by DRS, SEM, XRD and electrochemical measurements. The photocatalytic activity of PAN/Cd_(0.8) Zn_(0.2) S/MgIn_(2)S_(4) composite nanofiber membrane was investigated by simulated visible light-driven photodegradation of rhodamine B. Compared with PAN/Cd_(0.8) Zn_(0.2) S and PAN/MgIn_(2)S_(4), PAN/Cd_(0.8) Zn_(0.2) S/MgIn_(2)S_(4) composite nanofiber membrane exhibited the best photocatalytic degradation performance, with a degradation efficiency of 96% at 120 min. The as-prepared PAN/Cd_(0.8) Zn_(0.2) S/MgIn_(2)S_(4) composite nanofiber membrane has good flexibility and self-supporting properties compared with powdered semiconductor photocatalysts. It is easy to recover in practical applications and can avoid secondary pollution.