Controlled fabrication of Pr(OH)3 nanowires for enhanced photocatalytic activities

Nan Chen, Adnan Younis, Dewei Chu, Sean Li

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

In this report, praseodymium hydroxide Pr(OH)3 nanowires with different aspect ratios (length to diameter ratios) were synthesized by a facile hydrothermal approach. The variations in alkali concentration during synthesis are found to form different aspect ratios of nanowires. The X-ray diffraction and Raman spectroscopy analysis demonstrate the absence of any impurity phases in as-prepared materials. Subsequently, photocatalytic activities of as-prepared nanowires were evaluated by the degradation of methyl orange (MO). Our findings reveal that the nanowires with larger aspect ratios have higher photocatalytic efficiency than the smaller aspect ratio samples. X-ray photospectroscopy investigations reveal that the samples with higher aspect ratio are found to exhibit more oxygen vacancies as compared to lower aspect ratio samples. The enhanced photocatalytic activities can be attributed to the presence of higher percentage of active crystal facet (100), higher concentration of defects densities and narrower band gap. Thus, Pr(OH)3 nanowires can be considered as a potential candidate for the application of wastewater treatment and related technologies.

Original languageEnglish
Pages (from-to)60-67
Number of pages8
JournalJournal of Rare Earths
Volume37
Issue number1
DOIs
Publication statusPublished - Jan 2019
Externally publishedYes

Keywords

  • Nanowires
  • Photocatalyst
  • Praseodymium hydroxide
  • Rare earths

ASJC Scopus subject areas

  • General Chemistry
  • Geochemistry and Petrology

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