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Wastewater contaminated with hydrazine as scavenger agent for hydrogen production by Cu/Ti nanostructures

Catalysts, ISSN: 2073-4344, Vol: 11, Issue: 1, Page: 1-15
2021
  • 7
    Citations
  • 0
    Usage
  • 12
    Captures
  • 1
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    7
    • Citation Indexes
      7
  • Captures
    12
  • Mentions
    1
    • Blog Mentions
      1
      • 1

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Catalysts, Vol. 11, Pages 74: Wastewater Contaminated with Hydrazine as Scavenger Agent for Hydrogen Production by Cu/Ti Nanostructures

Catalysts, Vol. 11, Pages 74: Wastewater Contaminated with Hydrazine as Scavenger Agent for Hydrogen Production by Cu/Ti Nanostructures Catalysts doi: 10.3390/catal11010074 Authors: Mariana Hinojosa Reyes

Article Description

Cu/Ti photocatalysts were prepared by the sol-gel process with different copper loadings (1.0, 2.5, and 5.0 wt.%) and then thermally treated at several calcination temperatures from 400 to 600C. The materials were characterized by X-ray diffraction (XRD), N physisorption, Scanning Electronic Microscopy with Energy Dispersive X-ray Spectroscopy (SEM-EDS), Ultraviolet-visible-Diffuse Reflection Spectroscopy, Ultraviolet-visible spectroscopy as a function of the temperature, (Tempera-ture Programmed Reduction) TPR-chemisorption, XPS (X-ray Photoelectron Spectroscopy) and OH determination through DRIFTS (Diffuse reflectance infrared Fourier transform spectroscopy). The Cu/Ti photocatalysts were evaluated for the photocatalytic production of hydrogen using hydrazine as scavenging agent. Moreover, a detailed study of the Cu/Cu ratio and the corresponding formation of copper oxide was carried out to understand the correlation between the copper species and the photocatalytic activity. Simultaneously, the OH groups on the TiO surface also show insights into the behavior of these materials during the photocatalytic reaction. Despite the low hydrazine concentration (20 mM), the 1.0 (wt.%) Cu/Ti 500 photocatalyst enhanced the hydrogen production three and two times more than photolysis and bare TiO, respectively. The 1.0 Cu/Ti 500 photocata-lyst displayed outstanding stability for at least three continuous cycles of 8 h each, preserving the hydrogen production. The novel ability shown in this work represents an alternative to reduce the hydrazine residues in wastewater to transform it into a hydrogen-producing energy source and must be extended to other reductive pollutants found in wastewater.

Bibliographic Details

Mariana Hinojosa Reyes; Vicente Rodríguez González; Roberto Camposeco

MDPI AG

Chemical Engineering; Environmental Science; Chemistry

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