Author(s) Shinde, S.Laxman; Ishii, S.; Dao, T.Duy; Sugavaneshwar, R.Pasupathi; Takei, T.; Nanda, K.Kar; Nagao, T.
Journal ACS Appl Mater Interfaces
Date Published 2018 Jan 08

In this work, a promising strategy to increase the broadband solar light absorption was developed by synthesizing a composite of metal-free carbon nitride-carbon dots (C3N4-C dots) and plasmonic titanium nitride (TiN) nanoparticles (NPs) to improve the photoelectrochemical water-splitting performance under simulated solar radiation. Hot-electron injection from plasmonic TiN NPs to C3N4 played a role in photocatalysis, whereas C dots acted as catalysts for the decomposition of H2O2 to O2. The use of C dots also eliminated the need for a sacrificial reagent and prevented catalytic poisoning. By incorporating the TiN NPs and C dots, a sixfold improvement in the catalytic performance of C3N4 was observed. The proposed approach of combining TiN NPs and C dots with C3N4 proved effective in overcoming low optical absorption and charge recombination losses and also widens the spectral window, leading to improved photocatalytic activity.

DOI 10.1021/acsami.7b15066
ISSN 1944-8252
Citation ACS Appl Mater Interfaces. 2018.

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