Mn-doping-induced photocatalytic activity enhancement of ZnO nanorods prepared on glass substrates

Nur Ajrina Putri, Vivi Fauzia, S. Iwan, Liszulfah Roza, Akrajas Ali Umar, Setia Budi

Research output: Contribution to journalArticlepeer-review

88 Citations (Scopus)

Abstract

Mn-doped ZnO nanorods were synthesized on glass substrates via a two-steps process of ultrasonic spray pyrolysis and hydrothermal methods with four different concentrations Mn-doping (0, 1, 3, and 7 mol%). Introduction of Mn into ZnO is known could enhance the photocatalytic activity owing to the increase in the defect sites that effectively suppress the recombination of free electrons and holes. In this study, results show that Mn-doping has effectively modified the nucleations and crystal growth of ZnO, as evidenced by the increasing in the diameter, height, and the number of nanorods per unit area, besides slightly reduced the band gap and increased the oxygen vacancy concentrations in the ZnO lattice. This condition has successfully multiplied the photocatalytic performance of the ZnO nanorods in the degradation of methylene blue (MB) compared to the undoped-ZnO sample where in the typical process the MB can be degraded approximately 77% within only 35 min under a UV light irradiation.

Original languageEnglish
Pages (from-to)285-297
Number of pages13
JournalApplied Surface Science
Volume439
DOIs
Publication statusPublished - 1 May 2018

Keywords

  • Hydrothermal
  • Methylene blue
  • Mn doping
  • Photocatalytic activity
  • ZnO nanorods

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