PlumX Metrics
Embed PlumX Metrics

TiO 2 –NiO p–n nanocomposite with enhanced sonophotocatalytic activity under diffused sunlight

Ultrasonics Sonochemistry, ISSN: 1350-4177, Vol: 35, Issue: Pt B, Page: 655-663
2017
  • 82
    Citations
  • 0
    Usage
  • 58
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

Article Description

TiO 2 –NiO composites with p–n junction were developed by assembling p-type NiO on n-type TiO 2 using ultrasound assisted wet impregnation method. The sonophotocatalytic efficiencies of pure TiO 2 and TiO 2 –NiO composites were evaluated under diffused sunlight using methyl orange (MO) as a model pollutant. The impregnation of NiO nanoparticles on TiO 2 considerably enhanced the optical absorption in visible region (500–800 nm) due to the formation of p–n junctions at the interface between TiO 2 and NiO. The internal electric field induced by the p–n junction led to effective separation of electron–hole pairs and thereby generating a large amount of reactive species for the degradation of MO. The individual effect of ultrasound and diffused sunlight for the degradation of MO was found to be 30% and 6%, respectively. A synergy of 4.8 fold was achieved when ultrasound was combined with photocatalytic degradation process in the presence of diffused sunlight. The sonophotocatalytic activity of TiO 2 –NiO photocatalysts with different NiO loading was also evaluated and 10 wt% NiO loading was found to be optimal. Moreover, 66% of Total Organic Carbon (TOC) removal was achieved with the optimized TiO 2 –NiO composite in 140 min. In addition, the TiO 2 –NiO composite exhibited an enhanced photocurrent response under visible light illumination.

Provide Feedback

Have ideas for a new metric? Would you like to see something else here?Let us know