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The Design of Supramolecular Assemblies with Metal Salt as Precursors Enables The Growth of Stable Polymeric Carbon Nitride Photoanodes.

Authors :
Garg, Devesh
Shmila, Tirza
Mark, Gabriel
Mondal, Sanjit
Battula, Venugopala Rao
Volokh, Michael
Shalom, Menny
Source :
Advanced Sustainable Systems; Apr2024, Vol. 8 Issue 4, p1-10, 10p
Publication Year :
2024

Abstract

Polymeric carbon nitrides (CN) have gained significant interest as photoanodes in photoelectrochemical cells (PEC). A widely researched approach for synthesizing CN films with controlled optical and photoelectrochemical properties relies on using supramolecular assemblies as the precursors for thermal polymerization over a transparent conductive substrate. However, the formation of supramolecular assemblies is highly dependent on the temperature and solubility in a given solvent, limiting the full potential of this method. Moreover, the intercalation of metal ions is challenging due to the use of polar solvents. Here, this study shows a new way of synthesizing supramolecular assemblies with metal ions using a solvothermal approach. The solvent, monomer composition, salt quantity, reaction temperature, and film thickness are varied in this study. As a result, well‐attached, uniform CN films with good optoelectronic properties are achieved. The synthesized photoactive CN films exhibit very low onset potentials and reach ≈0.13, ≈0.15, and 0.30 ± 0.01 mA cm−2 photocurrents in 0.1 m phosphate buffer (neutral) solution, 0.1 m KOH(aq) (basic) solution, and 0.1 m KOH solution containing 10 vol.% triethanolamine as the hole scavenger, respectively. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
23667486
Volume :
8
Issue :
4
Database :
Complementary Index
Journal :
Advanced Sustainable Systems
Publication Type :
Academic Journal
Accession number :
176690389
Full Text :
https://doi.org/10.1002/adsu.202300447