Boron carbonitride sheet/ Cu2O composite for an efficient photocatalytic hydrogen evolution

Sivaprakash Kalimuthu, Induja Meenakshisundaram, Gomathipriya Ponnaiah, Karthikeyan Sekar

Research output: Contribution to journalArticle

Abstract

Cu2O nanoparticles were directly formed on the boron carbonitride (BCN) sheets by thermal condensation technique. Photocatalytic hydrogen evolution efficiency was greatly influenced by three-dimensional distribution and loading of Cu2O in the nanocomposite network structure. The oxidation state, crystalline phase, and size of the supported/un-supported nanoparticles were observed by XPS and XRD, and the internal morphology was determined via HR-TEM analysis. Visible light response and band position was confirmed by measuring the diffuse reflection spectroscopy (DRS). An efficient thermal, combined with a condensation method, was used to synthesize these nanocomposite architectures, which were then embedded into the BCN network. The broad visible light absorption of the synthesised nanocomposites was influenced by Cu2O loading on BCN sheets. The red shift in UV spectra of BCN/Cu2O confirmed that presence of Cu2O on BCN sheets resulted in reduced bandgap compared with the wider bandgap in BCN sheets. The H2 evolution activity was 59 μmol/h for the prepared composites, which is 59.5% enhanced compared with bare BCN. The enhanced photocatalytic activity was due to the influence of Cu2O on the BCN surface and enhanced charge separation in the interface at Cu2O with BCN.
Original languageEnglish
Pages (from-to)204-211
JournalMaterials Chemistry and Physics
Volume219
Early online date8 Aug 2018
DOIs
Publication statusE-pub ahead of print - 8 Aug 2018

Fingerprint

Carbon nitride
Boron
Hydrogen
boron
composite materials
Composite materials
hydrogen
Nanocomposites
nanocomposites
Condensation
Energy gap
condensation
Nanoparticles
boron carbonitride
nanoparticles
polarization (charge separation)
electromagnetic absorption
red shift
Light absorption
X ray photoelectron spectroscopy

Cite this

Kalimuthu, S., Meenakshisundaram, I., Ponnaiah, G., & Sekar, K. (2018). Boron carbonitride sheet/ Cu2O composite for an efficient photocatalytic hydrogen evolution. Materials Chemistry and Physics, 219, 204-211. https://doi.org/10.1016/j.matchemphys.2018.08.019
Kalimuthu, Sivaprakash ; Meenakshisundaram, Induja ; Ponnaiah, Gomathipriya ; Sekar, Karthikeyan. / Boron carbonitride sheet/ Cu2O composite for an efficient photocatalytic hydrogen evolution. In: Materials Chemistry and Physics. 2018 ; Vol. 219. pp. 204-211.
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Kalimuthu, S, Meenakshisundaram, I, Ponnaiah, G & Sekar, K 2018, 'Boron carbonitride sheet/ Cu2O composite for an efficient photocatalytic hydrogen evolution', Materials Chemistry and Physics, vol. 219, pp. 204-211. https://doi.org/10.1016/j.matchemphys.2018.08.019

Boron carbonitride sheet/ Cu2O composite for an efficient photocatalytic hydrogen evolution. / Kalimuthu, Sivaprakash; Meenakshisundaram, Induja; Ponnaiah, Gomathipriya; Sekar, Karthikeyan.

In: Materials Chemistry and Physics, Vol. 219, 08.08.2018, p. 204-211.

Research output: Contribution to journalArticle

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AU - Meenakshisundaram, Induja

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AU - Sekar, Karthikeyan

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Kalimuthu S, Meenakshisundaram I, Ponnaiah G, Sekar K. Boron carbonitride sheet/ Cu2O composite for an efficient photocatalytic hydrogen evolution. Materials Chemistry and Physics. 2018 Aug 8;219:204-211. https://doi.org/10.1016/j.matchemphys.2018.08.019