Thiourea and Triton X-100 as shape manipulating tools or more for Bi2WO6 photocatalysts?

Zsolt Kása, Kata Saszet, András Dombi, Klára Hernádi, Lucian Baia, Klára Magyari, Zsolt Pap

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3 Citations (Scopus)

Abstract

In the present work Bi2WO6 hierarchical flowers were obtained by hydrothermal crystallization and characterized by SEM, DRS, IR and XPS. The crystallization time and the influence of the crystal-shaping agents (Triton-X 100 and thiourea) was investigated on the UV and visible light degradation of Rhodamine – B and methyl orange (MO). It was found that after 15 h of hydrothermal crystallization an interesting structure appeared in the middle of the microflowers. The appearance of this morphological feature coincides with the appearance of Bi5+ and with the highest UV and Visible light activity. However, this material showed an outstanding activity when no thiourea was used. The latter contributed to the formation of surface anchored organics, which was proven to be detrimental for the sample obtained at longer crystallization times. These organic deposits can be removed partially, but it was not decisive concerning the photocatalytic activity.

Original languageEnglish
Pages (from-to)21-30
Number of pages10
JournalMaterials Science in Semiconductor Processing
Volume74
DOIs
Publication statusPublished - Feb 2018

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Keywords

  • Bismuth tungstate
  • Hierarchical nanostructures
  • Methyl orange
  • Photocatalysis
  • Rhodamine B
  • UV and visible light activity

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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