Abdpour, Soheil, Kowsari, Elaheh, Bazri, Behrouz, Moghaddam, Mohammad Reza Alavi, Tafreshi, Saeedeh Sarabadani, de Leeuw, Nora H.  ORCID: https://orcid.org/0000-0002-8271-0545, Simon, Ilka, Schmolke, Laura, Dietrich, Dennis, Ramakrishna, Seeram and Janiak, Christoph
2020.
Amino-functionalized MIL-101(Cr) photodegradation enhancement by sulfur-enriched copper sulfide nanoparticles: an experimental and DFT study.
Journal of Molecular Liquids
319
, 114341.
10.1016/j.molliq.2020.114341
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Abstract
In the present work, a direct Z-scheme composite photocatalyst, NH2-MIL-101(Cr)@CuS, with high photodegradation efficiency of Rhodamine B (RhB) degradation in the visible light spectrum, is fabricated through a solvothermal method. It was found that the NH2-MIL-101(Cr)@CuS composite with an appropriate amount of NH2-MIL-101(Cr) exhibited high catalytic performance in the RhB photodegradation. The photocurrent density and results from the electrochemical impedance spectroscopy (EIS) analysis confirm the promoted photocatalytic activity of the NH2-MIL-101(Cr)@CuS composite compared to the pristine MIL-101(Cr) and CuS nanoparticles, which were supported by the electron lifetime (τn) calculations for the samples. The trapping experiments and Mott-Schottky analysis revealed that the superoxide radicals (radical dotO2−) played an essential role in the photodegradation of RhB and the promoted photocatalytic activity contributed to a direct Z-scheme mechanism between CuS and NH2-MIL-101(Cr). Stability study also shows acceptable results during photocatalytic reaction. Furthermore, Density Functional Theory (DFT) calculations were performed to gain a better understanding of the electronic properties of the NH2-MIL-101(Cr)@CuS nanocomposite. The calculated band structures showed that the nanocomposite has a higher photocatalytic efficiency in the visible region compared to the pristine MIL-101(Cr) and CuS. The calculated band gap of both the semiconductors and the hybrid nanocomposite confirms the experimental results.
| Item Type: | Article |
|---|---|
| Date Type: | Publication |
| Status: | Published |
| Schools: | Schools > Chemistry |
| Publisher: | Elsevier |
| ISSN: | 0167-7322 |
| Date of First Compliant Deposit: | 14 October 2020 |
| Date of Acceptance: | 15 September 2020 |
| Last Modified: | 19 Nov 2024 18:30 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/135600 |
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