Please use this identifier to cite or link to this item:
http://doi.org/10.25358/openscience-9580
Authors: | Ashraf, Muhammad Ali, Roshan Khan, Ibrahim Ullah, Nisar Sohail Ahmad, Muhammad Kida, Tetsuya Wooh, Sanghyuk Tremel, Wolfgang Schwingenschlögl, Udo Tahir, Muhammad Nawaz |
Title: | Bandgap engineering of melon using highly reduced graphene oxide for enhanced photoelectrochemical hHydrogen evolution |
Online publication date: | 6-Nov-2023 |
Year of first publication: | 2023 |
Language: | english |
Abstract: | The uncondensed form of polymeric carbon nitrides (PCN), generally known as melon, is a stacked two-dimensional structure of poly(aminoimino)heptazine. Melon is used as a photocatalyst in solar energy conversion applications, but suffers from a poor photoconversion efficiency due to weak optical absorption in the visible spectrum, high activation energy, and inefficient separation of photoexcited charge carriers. We report experimental and theoretical studies to engineer the bandgap of melon with highly reduced graphene oxide (HRG). Three HRG@melon nanocomposites with different HRG:melon ratios (0.5%, 1%, and 2%) were prepared. The 1% HRG@melon nanocomposite showed a higher photocurrent density (71 μA cm−2) than melon (24 μA cm−2) in alkaline conditions. The addition of a hole scavenger further increased the photocurrent density to 630 μA cm−2 relative to the reversible hydrogen electrode (RHE). These experimental results were validated by calculations using density functional theory (DFT), which revealed that HRG results in a significant charge redistribution and an improved photocatalytic hydrogen evolution reaction (HER). |
DDC: | 540 Chemie 540 Chemistry and allied sciences |
Institution: | Johannes Gutenberg-Universität Mainz |
Department: | FB 09 Chemie, Pharmazie u. Geowissensch. |
Place: | Mainz |
ROR: | https://ror.org/023b0x485 |
DOI: | http://doi.org/10.25358/openscience-9580 |
Version: | Published version |
Publication type: | Zeitschriftenaufsatz |
License: | CC BY |
Information on rights of use: | https://creativecommons.org/licenses/by/4.0/ |
Journal: | Advanced materials Version of Record (VoR) |
Pages or article number: | 2301342 |
Publisher: | Wiley-VCH |
Publisher place: | Weinheim |
Issue date: | 2023 |
ISSN: | 0935-9648 |
Publisher DOI: | 10.1002/adma.202301342 |
Appears in collections: | DFG-491381577-H |
Files in This Item:
File | Description | Size | Format | ||
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bandgap_engineering_of_melon_-20231106122138320.pdf | 4.21 MB | Adobe PDF | View/Open |