Photoelectrochemical Evidence of Cu2O/TiO2Nanotubes Hetero-Junctions formation and their Physicochemical Characterization

Conigliaro, G

Risultato della ricerca: Article

26 Citazioni (Scopus)

Abstract

Cu2O/TiO2nanotubes heterojunctions were fabricated by electrochemical deposition of cuprous oxide on TiO2nanotubes arrays grown by anodizing. X-ray diffraction and Raman Spectroscopy analysis allows for identification of Cu2O, whose morphological features were studied by Scanning Electron Microscopy as a function of the charge circulated during the electrodeposition step. Photoelectrochemical measurements in aqueous solutions evidenced a red shift of the light absorption threshold of TiO2nanotubes due to the presence of cuprous oxide even for very low circulated charges, while electrochemical impedance measurements proved a significant reduction of the electrode impedance due the presence of Cu2O. Photoelectrochemical measurements in non aqueous solutions allow to reduce reverse bias across the junction and to measure stationary cathodic photocurrent, thus confirming the formation of p-type Cu2O inside the nanotubes.
Lingua originaleEnglish
pagine (da-a)315-323
Numero di pagine9
RivistaElectrochimica Acta
Volume144
Stato di pubblicazionePublished - 2014

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Oxides
Anodic oxidation
Photocurrents
Electrodeposition
Light absorption
Nanotubes
Raman spectroscopy
Heterojunctions
X ray diffraction
Scanning electron microscopy
Electrodes
cuprous oxide

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Electrochemistry

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title = "Photoelectrochemical Evidence of Cu2O/TiO2Nanotubes Hetero-Junctions formation and their Physicochemical Characterization",
abstract = "Cu2O/TiO2nanotubes heterojunctions were fabricated by electrochemical deposition of cuprous oxide on TiO2nanotubes arrays grown by anodizing. X-ray diffraction and Raman Spectroscopy analysis allows for identification of Cu2O, whose morphological features were studied by Scanning Electron Microscopy as a function of the charge circulated during the electrodeposition step. Photoelectrochemical measurements in aqueous solutions evidenced a red shift of the light absorption threshold of TiO2nanotubes due to the presence of cuprous oxide even for very low circulated charges, while electrochemical impedance measurements proved a significant reduction of the electrode impedance due the presence of Cu2O. Photoelectrochemical measurements in non aqueous solutions allow to reduce reverse bias across the junction and to measure stationary cathodic photocurrent, thus confirming the formation of p-type Cu2O inside the nanotubes.",
author = "{Conigliaro, G} and {Di Quarto}, Francesco and Monica Santamaria and {Di Franco}, Francesco",
year = "2014",
language = "English",
volume = "144",
pages = "315--323",
journal = "Electrochimica Acta",
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TY - JOUR

T1 - Photoelectrochemical Evidence of Cu2O/TiO2Nanotubes Hetero-Junctions formation and their Physicochemical Characterization

AU - Conigliaro, G

AU - Di Quarto, Francesco

AU - Santamaria, Monica

AU - Di Franco, Francesco

PY - 2014

Y1 - 2014

N2 - Cu2O/TiO2nanotubes heterojunctions were fabricated by electrochemical deposition of cuprous oxide on TiO2nanotubes arrays grown by anodizing. X-ray diffraction and Raman Spectroscopy analysis allows for identification of Cu2O, whose morphological features were studied by Scanning Electron Microscopy as a function of the charge circulated during the electrodeposition step. Photoelectrochemical measurements in aqueous solutions evidenced a red shift of the light absorption threshold of TiO2nanotubes due to the presence of cuprous oxide even for very low circulated charges, while electrochemical impedance measurements proved a significant reduction of the electrode impedance due the presence of Cu2O. Photoelectrochemical measurements in non aqueous solutions allow to reduce reverse bias across the junction and to measure stationary cathodic photocurrent, thus confirming the formation of p-type Cu2O inside the nanotubes.

AB - Cu2O/TiO2nanotubes heterojunctions were fabricated by electrochemical deposition of cuprous oxide on TiO2nanotubes arrays grown by anodizing. X-ray diffraction and Raman Spectroscopy analysis allows for identification of Cu2O, whose morphological features were studied by Scanning Electron Microscopy as a function of the charge circulated during the electrodeposition step. Photoelectrochemical measurements in aqueous solutions evidenced a red shift of the light absorption threshold of TiO2nanotubes due to the presence of cuprous oxide even for very low circulated charges, while electrochemical impedance measurements proved a significant reduction of the electrode impedance due the presence of Cu2O. Photoelectrochemical measurements in non aqueous solutions allow to reduce reverse bias across the junction and to measure stationary cathodic photocurrent, thus confirming the formation of p-type Cu2O inside the nanotubes.

UR - http://hdl.handle.net/10447/100191

M3 - Article

VL - 144

SP - 315

EP - 323

JO - Electrochimica Acta

JF - Electrochimica Acta

SN - 0013-4686

ER -