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Visible Light Driven Photoanodes for Water Oxidation Based on Novel r-GO/β-Cu(2)V(2)O(7)/TiO(2) Nanorods Composites

This paper describes the preparation and the photoelectrochemical performances of visible light driven photoanodes based on novel r-GO/β-Cu(2)V(2)O(7)/TiO(2) nanorods/composites. β-Cu(2)V(2)O(7) was deposited on both fluorine doped tin oxide (FTO) and TiO(2) nanorods (NRs)/FTO by a fast and convenie...

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Detalles Bibliográficos
Autores principales: Shuang, Shuang, Girardi, Leonardo, Rizzi, Gian Andrea, Sartorel, Andrea, Marega, Carla, Zhang, Zhengjun, Granozzi, Gaetano
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6070958/
https://www.ncbi.nlm.nih.gov/pubmed/30022003
http://dx.doi.org/10.3390/nano8070544
Descripción
Sumario:This paper describes the preparation and the photoelectrochemical performances of visible light driven photoanodes based on novel r-GO/β-Cu(2)V(2)O(7)/TiO(2) nanorods/composites. β-Cu(2)V(2)O(7) was deposited on both fluorine doped tin oxide (FTO) and TiO(2) nanorods (NRs)/FTO by a fast and convenient Aerosol Assisted Spray Pyrolysis (AASP) procedure. Ethylenediamine (EN), ammonia and citric acid (CA) were tested as ligands for Cu(2+) ions in the aerosol precursors solution. The best-performing deposits, in terms of photocurrent density, were obtained when NH(3) was used as ligand. When β-Cu(2)V(2)O(7) was deposited on the TiO(2) NRs a good improvement in the durability of the photoanode was obtained, compared with pure β-Cu(2)V(2)O(7) on FTO. A further remarkable improvement in durability and photocurrent density was obtained upon addition, by electrophoretic deposition, of reduced graphene oxide (r-GO) flakes on the β-Cu(2)V(2)O(7)/TiO(2) composite material. The samples were characterized by X-ray Photoelectron Spectroscopy (XPS), Raman, High Resolution Transmission Electron Microscopy (HR-TEM), Scanning Electron Microscopy (SEM), Wide Angle X-ray Diffraction (WAXD) and UV–Vis spectroscopies. The photoelectrochemical (PEC) performances of β-Cu(2)V(2)O(7) on FTO, β-Cu(2)V(2)O(7)/TiO(2) and r-GO/β-Cu(2)V(2)O(7)/TiO(2) were tested in visible light by linear voltammetry and Electrochemical Impedance Spectroscopy (EIS) measurements.