ZnS-based dual nano-semiconductors (ZnS/PbS, ZnS/CdS or ZnS/Ag2S,): A green synthesis route and photocatalytic comparison for removing organic dyes

Hua Jie Wang, Ying Cao, Le Le Wu, Sha Sha Wu, Ali Raza, Nan Liu, Jin Ye Wang, Teruo Miyazawa

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

Organic dyes generating from many industries are considered as a potential source of water-pollution and have negative effects on human health. The present study was aimed to construct a green synthesis method for fabrication of ZnS-based dual nano-semiconductors and to compare the photocatalytic properties for removing cationic and anionic dyes. ZnS nanoparticles were synthesized using a template synthesis in bovine serum albumin (BSA) solution and then ZnS/PbS, ZnS/CdS and ZnS/Ag2S dual nano-semiconductors were prepared using ion-exchange method. Prepared nano-semiconductors were characterized by using HR-TEM, XRD, FTIR, TG/DTA and AAS. Moreover, photocatalytic activity of prepared nano-semiconductors was tested against Rhodamine B (cationic dye) and Methyl Orange (anionic dye). Results revealed that a controllable ZnS/PbS, ZnS/CdS and ZnS/Ag2S ratio in nano-semiconductors can be achieved by adjusting the ion-exchange time. Prepared ZnS based composites exhibited higher photocatalytic efficiency than that of ZnS alone. In addition, photocatalytic activity of ZnS-based dual nano-semiconductors was found to be dependent upon composition and ratio of sulphides in nano-semiconductors with environmental pH. It was concluded that the combination of template synthesis and ion-exchange method is a feasible approach to fabricate new photocatalysts with higher photocatalytic activity.

Original languageEnglish
Pages (from-to)6771-6779
Number of pages9
JournalJournal of Environmental Chemical Engineering
Volume6
Issue number6
DOIs
Publication statusPublished - 2018 Dec

Keywords

  • Dual nano-semiconductors
  • Ion-exchange
  • Photocatalysts
  • Sulphide
  • Template synthesis

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Waste Management and Disposal
  • Pollution
  • Process Chemistry and Technology

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