RGO-MoS2 Supported NiCo2O4 Catalyst toward Solar Water Splitting and Dye Degradation

Sankalpita Chakrabarty, Ayan Mukherjee, Suddhasatwa Basu

Research output: Contribution to journalArticlepeer-review

92 Scopus citations

Abstract

Formation of the NiCo2O4 (NCO) nanoparticle with the simultaneous reduction of GO and growth of MoS2 by a two step hydrothermal process results in a 2D RGO-MoS2 (R-MoS2) cocatalyst layer with intimate interfacial contact with NCO. The phase purity, chemical coupling and morphology of the synthesized materials are established through X-ray diffraction, Raman and X-ray photoelectron spectroscopy studies. The ternary composite, RGO-MoS2-NiCo2O4 (RM-NCO), shows excellent electrocatalytic performance toward solar driven water splitting with 3.08% solar to hydrogen (STH) conversion efficiency, photocurrent density of 5.36 mA cm-2, injection efficiency of 97% at 1 V (vs Ag/AgCl) and long-term stability. The photo degradation (95%) of Rhodamine B under visible light irradiation is obtained in 90 min by the ternary composite (RM-NCO). The improved performance of the ternary composite, RM-NCO, over bare NCO and MoS2, toward photocatalytic activity is achieved through the dual charge transfer pathway between interfacial layer of NCO and MoS2 to RGO, which leads to generation of more photoinduced charge carriers and suppression of electron-hole recombination process.

Original languageEnglish
Pages (from-to)5238-5247
Number of pages10
JournalACS Sustainable Chemistry and Engineering
Volume6
Issue number4
DOIs
StatePublished - 2 Apr 2018
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2018 American Chemical Society.

Funding

The authors acknowledge financial support of Department of Science and Technology (DST) and facility supports from the Nanoscale Research Facility, I.I.T. Delhi. S. Chakrabarty (PDF/ 2015/000025) and A. Mukherjee (PDF/2016/003476) are thankful to Science and Engineering Research Board (SERB) for providing NPDF.

FundersFunder number
I.I.T. Delhi
Nanoscale Research Facility
Department of Science and Technology, Ministry of Science and Technology

    Keywords

    • NiCoO nanoparticle
    • Photocatalyst
    • Photoelectrochemical water splitting
    • RGO-MoS cocatalyst

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