Facile Fabrication of Porous ZnS and ZnO Films by Coaxial Electrospinning for Highly Efficient Photodegradation of Organic Dyes. (3rd November 2017)

• Record Type: Journal Article
• Authors: Wang, Hua; Liang, Liefeng; Cheng, Xinjian; Luo, Yanmei; Sun, Sheng
• Is Part Of: Photochemistry and photobiology. Volume 94:Number 1(2018)
• Page Start: 17
• Page End: 26
• Publication Date: 2017-11-03
• Subjects: Photochemistry -- Periodicals; Light -- Physiological effect -- Periodicals; 541.35
• DOI: 10.1111/php.12836
• Languages: English
• ISSNs: 0031-8655

Abstract

Abstract: Porous ZnS and ZnO nano‐crystal films were fabricated via a three‐step procedure. First, Zn(CH3 COO)2 /Silk Fibroin nanofiber mats were prepared by coaxial electrospinning. Second, Zn(CH3 COO)2 /Silk Fibroin mats were immersed in NaS solution to react with S 2− to obtain ZnS/Silk Fibroin nanofiber mats. Finally, ZnO porous films were prepared by calcination of ZnS/Silk Fibroin composite mat at 600°C in air atmosphere. When ZnS/Silk Fibroin mats were calcinated in nitrogen, ZnS/Carbon composite mats were obtained accordingly. The resulting porous films were fully characterized. The ZnO porous films were the aggregation of ZnO nano‐crystal with hexagonal wurtzite structure. The seize of ZnO was estimated in the range of 10–20 nm. Both of the ZnS and ZnO nano‐crystal films exhibited high photocatalytic activities for the photodegradation of Methylene blue and Rhodamine B. It was also found that ZnO porous films are better than ZnS/Carbon nanofiber mats. In addition, photocatalysis of a real wastewater sample from a printing and dyeing company was conducted. The ZnO porous films exhibited excellent performance to treat the real samples. Moreover, the porous ZnO nano‐crystal photocatalyst could easily be recycled without notable loss of catalysis ability. Abstract : Porous ZnS and ZnO nanocrystal films were fabricated via a three‐step procedure starting from electrospinning. The nanocrystal films exhibited high photocatalytic activities for the photodegradation of methylene blue and rhodamine B. Also the films show excellent photocatalysis to a real wastewater sample from a printing and dyeing company.