Fabrication of photocatalytic PAN nanofiber membrane loading with TiO2@RGO by electro-spinning & electro-spraying

The new fibrous photocatalytic nanofiber membrane with both good photodegradation performance and mechanical property was developed. Here, TiO2@RGO (TR) which could disperse in PAN solution stably was prepared by solvothermal method with the help of acetic acid. Then the new photocatalytic PAN nanofiber membrane SS7.5-2.3 TR(A) was fabricated for the first time by electro-spinning & electro-spraying, where TR ruled as photocatalysts. Benefited from its novel triple structure, SS7.5-2.3 TR(A) had the best toughness when compared with S-0 (electro-spun dual-network structural membrane) and SS7.5 (control membrane without TR in electro-spraying solution). Moreover, the morphology and mechanical property of membrane was similar to that of original SS7.5-2.3 TR when it was used to photodegrade methyl orange solution five times later. Meanwhile, SS7.5-2.3 TR also had significant photocatalytic performance when applied to the degradation of other three dyes (rhodamine B, methylene blue and oil red) and silk dyeing wastewater, which indicated its potential in dyeing wastewater treatment.