Native defects in silver orthophosphate and their effects on photocatalytic activity under visible light irradiation

Uyi Sulaeman, Dadan Hermawan, Roy Andreas, Ahmad Zuhairi Abdullah, Shu Yin

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Native defects in silver orthophosphate could be generated by simple co-precipitation method under ethanol-aqueous solution using AgNO 3 and Na 2 HPO 4 .12H 2 O. AgNO 3 ethanol-aqueous solution with the ethanol contents of 0%, 25%, 50%, 75%, 90% and 100% was reacted with Na 2 HPO 4 aqueous solution. The produced catalysts were characterized using XRD, DRS, FE-SEM, BET specific surface area and XPS. The increase of ethanol content in the synthesis process decreased the Ag/P atomic ratio of Ag 3 PO 4 . The native defects of silver vacancy might be generated on the surface of Ag 3 PO 4 . The activity of Ag 3 PO 4 for Rhodamine B degradation dramatically increased by 5.8 times higher compared to that of the pristine Ag 3 PO 4 . The defect states of Ag vacancies enhanced the separation of electron-hole pairs, leading to the improvement of photocatalytic activity.

Original languageEnglish
Pages (from-to)1029-1035
Number of pages7
JournalApplied Surface Science
Volume428
DOIs
Publication statusPublished - 2018 Jan 15

Keywords

  • Co-precipitation
  • Defect
  • Photocatalyst
  • Silver orthophosphate
  • Silver vacancy

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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