TY - JOUR
T1 - Photon flux influence on photoelectrochemical water treatment
AU - GARCIA SEGURA, Sergio
AU - Tugaoen, Heather O.Neal
AU - Hristovski, Kiril
AU - Westerhoff, Paul
N1 - Funding Information:
This work was partially funded through the Nano-Enabled Water Treatment Technologies Nanosystems Engineering Research Center by the National Science Foundation ( EEC-1449500 ).
Publisher Copyright:
© 2017 Elsevier B.V.
PY - 2018/2
Y1 - 2018/2
N2 - 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.
AB - 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.
KW - Advanced oxidation
KW - Energy
KW - Pollution
KW - Titanium dioxide
KW - Water treatment
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U2 - 10.1016/j.elecom.2017.12.026
DO - 10.1016/j.elecom.2017.12.026
M3 - Article
AN - SCOPUS:85040010660
SN - 1388-2481
VL - 87
SP - 63
EP - 65
JO - Electrochemistry Communications
JF - Electrochemistry Communications
ER -