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Facile Fabrication of Porous ZnS and ZnO Films by Coaxial Electrospinning for Highly Efficient Photodegradation of Organic Dyes
Author(s) -
Wang Hua,
Liang Liefeng,
Cheng Xinjian,
Luo Yanmei,
Sun Sheng
Publication year - 2017
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/php.12836
Subject(s) - materials science , wurtzite crystal structure , fibroin , photocatalysis , electrospinning , calcination , photodegradation , chemical engineering , nanofiber , porosity , rhodamine b , composite number , composite material , silk , nanotechnology , catalysis , polymer , zinc , organic chemistry , chemistry , metallurgy , engineering
Porous ZnS and ZnO nano‐crystal films were fabricated via a three‐step procedure. First, Zn(CH 3 COO) 2 /Silk Fibroin nanofiber mats were prepared by coaxial electrospinning. Second, Zn(CH 3 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.