g-C3N4/CoNiFe-LDH Z-scheme heterojunction for efficient CO2 photoreduction and MB dye photodegradation

Abstract

The development of efficient and stable photocatalysts to solve environmental issues is essential and remains a big challenge. In this work, flower-like CoNiFe-LDH is deposited in situ on g-C3N4 nanosheets, successfully constructing a Z-scheme heterojunction CoNiFe-LDH/g-C3N4 photocatalyst for the photoreduction of CO2 and photodegradation of MB dye. The synthesized nanohybrid shows superior photocatalytic CO2 performance (42.04 μmol g−1 h−1) and fast photodegradation MB performance (0.1057 min−1). The improved photocatalytic performance was attributed to the formation of the Z-scheme heterojunction with matched energy bands, and the intimate heterojunction contact interface, which significantly enhanced the interfacial charge transfer rate and improved the separation efficiency of electron–hole pairs. Moreover, the photocatalytic mechanism was proposed based on PL, photocurrent responses, EIS, and EPR experiments. This work can shed light on further application for environmental problems of Z-scheme heterojunction photocatalysts.

Graphical abstract: g-C3N4/CoNiFe-LDH Z-scheme heterojunction for efficient CO2 photoreduction and MB dye photodegradation

Supplementary files

Article information

Article type
Paper
Submitted
15 Aug 2021
Accepted
08 Oct 2021
First published
09 Oct 2021

Catal. Sci. Technol., 2021, Advance Article

g-C3N4/CoNiFe-LDH Z-scheme heterojunction for efficient CO2 photoreduction and MB dye photodegradation

B. Zhu, Q. Xu, X. Bao, D. Lu, H. Yin, Y. Qin and X. Shen, Catal. Sci. Technol., 2021, Advance Article , DOI: 10.1039/D1CY01475G

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