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One-Pot Synthesis of nickel-modified carbon nitride layers toward efficient photoelectrochemical cells
- Source :
- RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia, instname
- Publication Year :
- 2017
- Publisher :
- American Chemical Society, 2017.
-
Abstract
- [EN] A new method to significantly enhance the photoelectrochemical properties of phenyl-modified carbon nitride layers via the insertion of nickel ions into carbon nitride layers is reported. The nickel ions: are embedded within the carbon nitride layers by manipulating the interaction of Ni ions and molten organic molecules at elevated temperature prior to their condensation. A detailed analysis of the chemical and photophysical properties suggests that the nickel ions dissolve in the molten molecules, leading to the homogeneous distribution of nickel atoms within the carbon nitride layers. We found that the nickel atoms can alter the growth mechanism of carbon nitride layers, resulting in extended light absorption, charge transfer properties, and the total photoelectrochemical performance. For the most photoactive electrode, the Ni ions have an oxidation state of 2.8, as confirmed by soft X-ray absorption spectroscopy. Furthermore, important parameters such as absorption coefficient, exciton lifetime, and diffusion length were studied in depth, providing substantial progress in our understanding of the photoelectrochemical properties of carbon nitride films. This work opens new opportunities for the growth of carbon nitride layers and similar materials on different surfaces and provides important progress in our understanding of the photophysical and photoelectrochemical properties of carbon nitride layers toward their implantation in photoelectronic and other devices.<br />We thank the use Katz Institute for Nanoscale Science & Technology Ben Gurion University for HR-TEM measurements. M.S. thanks Dr. Laurent Chabanne for fruitful discussion. K.M.L. is grateful for the support by the Helmholtz Association (VH-NG-1140).
- Subjects :
- inorganic chemicals
Materials science
Absorption spectroscopy
Inorganic chemistry
chemistry.chemical_element
02 engineering and technology
Nitride
010402 general chemistry
01 natural sciences
Ion
chemistry.chemical_compound
Charge transfer
QUIMICA ORGANICA
Oxidation state
Molecule
General Materials Science
Carbon nitride
Photoelectrochemical cell
021001 nanoscience & nanotechnology
0104 chemical sciences
Nickel
chemistry
Molten organic molecules
Photoelectrochemical cells
Carbon nitride film
0210 nano-technology
Nickel electrocatalyst
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia, instname
- Accession number :
- edsair.doi.dedup.....209652fc2a6bdda2091212f2164c6e7e