Flexible Electrospun Carbon Nanofiber/Tin(IV) Sulfide Core/Sheath Membranes for Photocatalytically Treating Chromium(VI)-Containing Wastewater

Yunlei Zhong,Xun Qiu,Dongyun Chen^*（陈冬赟）,Najun Li,Qingfeng Xu,Hua Li,Jinghui He, andJianmei Lu^*（路建美）

College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Suzhou Nano Science and Technology,Soochow University, Suzhou 215123,China

ACS Appl. Mater. Interfaces,2016,8(42), pp 28671–28677

We report an efficient method for fabricating flexible membranes of electrospun carbon nanofiber/tin(IV) sulfide (CNF@SnS₂) core/sheath fibers. CNF@SnS₂is a new photocatalytic material that can be used to treat wastewater containing high concentrations of hexavalent chromium (Cr(VI)). The hierarchical CNF@SnS₂core/sheath membranes have a three-dimensional macroporous architecture. This provides continuous channels for the rapid diffusion of photoelectrons generated by SnS₂nanoparticles under visible light irradiation. The visible light (λ > 400 nm) driven photocatalytic properties of CNF@SnS₂are evaluated by the reduction of water-soluble Cr(VI). CNF@SnS₂exhibits high visible light-driven photocatalytic activity because of its low band gap of 2.34 eV. Moreover, CNF@SnS₂exhibits good photocatalytic stability and excellent cycling stability. Under visible light irradiation, the optimized CNF@SnS₂membranes exhibit a high rate of degradation of 250 mg/L of aqueous Cr(VI) and can completely degrade the Cr(VI) within 90 min.

链接：http://pubs.acs.org/doi/abs/10.1021/acsami.6b10241