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| Naji, M. |
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| Motta, Antonella |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Ali, M. A. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Hinder, Steven
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Publications (7/7 displayed)
- 2021A synergistic Cs2CO3 ETL treatment to incorporate Cs cation into perovskite solar cells via two-step scalable fabricationcitations
- 2019Theoretical and experimental investigation of visible light responsive AgBiS2-TiO2 heterojunctions for enhanced photocatalytic applicationscitations
- 2018High speed chalcogenide glass electrochemical metallization cells with various active metalscitations
- 2018The effect of Ni addition onto a Cu-based ternary support on the H₂ production over glycerol steam reforming reactioncitations
- 2014n-type chalcogenides by ion implantationcitations
- 2014n-type chalcogenides by ion implantation.citations
- 2012Determination of the deposition order of overlapping latent fingerprints and inks using secondary ion mass spectrometry.citations
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article
Theoretical and experimental investigation of visible light responsive AgBiS2-TiO2 heterojunctions for enhanced photocatalytic applications
Abstract
<p>The formation of heterostructure nanocomposite has been demonstrated to be an effective route to enhance the photocatalytic efficiency. Ternary chalcogenides (TC) with remarkable visible light absorption, are identified as an ideal candidate to form heterostructure with classical semiconductors such as TiO<sub>2</sub>. In the current investigation, novel heterojunctions of the AgBiS<sub>2</sub>-TiO<sub>2</sub> composite were synthesised using a solvothermal technique. Computational analysis was utilised to study the electronic and optical properties of the pristine parent samples. The XRD results show the formation of the cubic phase of AgBiS<sub>2</sub> and TiO<sub>2</sub> is in tetragonal phase. The XPS and the TEM results illustrate the heterostructure formation. The UV-DRS pattern for all the composites shows enhanced visible light absorption due to the coupling of TC. The band gaps of the composites were decreased with increased doping levels. These materials were further studied for their photocatalytic efficiency, by photocatalytic degradation of Doxycycline, photocatalytic hydrogen generation and photocatalytic antimicrobial disinfection. The composite samples illustrated more than 95% degradation results within 180 min and showed about 3 log reductions of bacterial strains (E. coli and S. aureus) within 30 min of irradiation. The hydrogen production results were interesting as the AgBiS<sub>2</sub> based composites illustrated a 1000-fold enhanced output. The enhanced photocatalytic activity is attributed to the decreased rate of recombination of the photogenerated excitons, as validated in the PL measurements. The scavenging experiments along with the theoretical analysis are used to define a plausible photocatalytic mechanism.</p>