Publication: S-Scheme ZIF-67/CuFe-LDH Heterojunction for High-Performance Photocatalytic H2 Evolution and CO2 to MeOH Production
Date
2023
Authors
Vennapoosa C.S.
Varangane S.
Gonuguntla S.
Abraham B.M.
Ahmadipour M.
Pal U.
Journal Title
Journal ISSN
Volume Title
Publisher
American Chemical Society
Abstract
The S-scheme heterojunction photocatalyst holds potential for better photocatalysis owing to its capacity to broaden the light absorption range, ease electron-hole separation, extend the charge carrier lifespan, and maximize the redox ability. In this study, we integrate zeolitic imidazolate frameworks (ZIFs-67) with the CuFe-LDH composite, offering a straightforward approach towards creating a novel hybrid nanostructure, enabling remarkable performance in both photocatalytic hydrogen (H2) evolution and carbon dioxide (CO2) to methanol (MeOH) conversion. The ZIF-67/CuFe-LDH photocatalyst exhibits an enhanced photocatalytic hydrogen evolution rate of 7.4 mmol g-1 h-1 and an AQY of 4.8%. The superior activity of CO2 reduction to MeOH generation was 227 ?mol g-1 h-1 and an AQY of 5.1%, and it still exhibited superior activity after continuously working for 4 runs with nearly negligible decay in activity. The combined spectroscopic analysis, electrochemical study, and computational data strongly demonstrate that this hybrid material integrates the advantageous properties of the individual ZIF-67 and CuFe-LDH exhibiting distinguished photon harvesting, suppression of the photoinduced electron-hole recombination kinetics, extended lifetime, and efficient charge transfer, subsequently boosting higher photocatalytic activities. � 2023 American Chemical Society.
Description
Keywords
Charge transfer , Copper compounds , Heterojunctions , Hybrid materials , Hydrogen , Iron compounds , Light absorption , Photocatalytic activity , Spectroscopic analysis , Electron-hole separation , H 2 evolution , Hybrid nanostructures , Hydrogen evolution rate , Lifespans , Performance , Photo-catalytic , Photocatalytic hydrogen , Photocatalytic hydrogen evolution , Zeolitic imidazolate frameworks , Carbon dioxide