Abstract

This work quantifies the role of incident light in photoelectrochemical water treatment device efficiency to destroy waterborne pollutants. The conversion of incident photon flux from monochromatic light emitting diodes (285 nm, 300 nm, and 365 nm) into current (i.e., incident photon-to-current efficiency, IPCE) was studied. Identical photocurrent responses were obtained at identical photon flux but using different monochromatic wavelengths. Photocurrent increased with higher incident photon flux from the light emitting diodes (LEDs). However, an exponential decrease in IPCE occurred simultaneously, indicating a lower percentage of those photons converted into electrons. Higher photocurrents indicated more charge carriers photoelectrogenerated greater amount of oxidant species (e.g., [rad]OH) capable of degrading organic pollutants in water. Thus, IPCE aided in optimizing the energy needed to generate [rad]OH and remove pollutants.

Original languageEnglish (US)
Pages (from-to)63-65
Number of pages3
JournalElectrochemistry Communications
Volume87
DOIs
StatePublished - Feb 1 2018

Fingerprint

Water treatment
Photons
Fluxes
Photocurrents
Light emitting diodes
Organic pollutants
Charge carriers
Oxidants
Wavelength
Electrons
Water

Keywords

  • Advanced oxidation
  • Energy
  • Pollution
  • Titanium dioxide
  • Water treatment

ASJC Scopus subject areas

  • Electrochemistry

Cite this

Photon flux influence on photoelectrochemical water treatment. / GARCIA SEGURA, Sergio; Tugaoen, Heather O.Neal; Hristovski, Kiril; Westerhoff, Paul.

In: Electrochemistry Communications, Vol. 87, 01.02.2018, p. 63-65.

Research output: Contribution to journalArticle

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