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Zappia M, Bianca G, Bellani S, Curreli N, Sofer Z, Serri M, Najafi L, Piccinni M, Oropesa-Nuñez R, Marvan P, Pellegrini V, Kriegel I, Prato M, Cupolillo A, Bonaccorso F. Two-Dimensional Gallium Sulfide Nanoflakes for UV-Selective Photoelectrochemical-type Photodetectors. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2021; 125:11857-11866. [PMID: 34276861 PMCID: PMC8279705 DOI: 10.1021/acs.jpcc.1c03597] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 04/28/2021] [Indexed: 06/13/2023]
Abstract
Two-dimensional (2D) transition-metal monochalcogenides have been recently predicted to be potential photo(electro)catalysts for water splitting and photoelectrochemical (PEC) reactions. Differently from the most established InSe, GaSe, GeSe, and many other monochalcogenides, bulk GaS has a large band gap of ∼2.5 eV, which increases up to more than 3.0 eV with decreasing its thickness due to quantum confinement effects. Therefore, 2D GaS fills the void between 2D small-band-gap semiconductors and insulators, resulting of interest for the realization of van der Waals type-I heterojunctions in photocatalysis, as well as the development of UV light-emitting diodes, quantum wells, and other optoelectronic devices. Based on theoretical calculations of the electronic structure of GaS as a function of layer number reported in the literature, we experimentally demonstrate, for the first time, the PEC properties of liquid-phase exfoliated GaS nanoflakes. Our results indicate that solution-processed 2D GaS-based PEC-type photodetectors outperform the corresponding solid-state photodetectors. In fact, the 2D morphology of the GaS flakes intrinsically minimizes the distance between the photogenerated charges and the surface area at which the redox reactions occur, limiting electron-hole recombination losses. The latter are instead deleterious for standard solid-state configurations. Consequently, PEC-type 2D GaS photodetectors display a relevant UV-selective photoresponse. In particular, they attain responsivities of 1.8 mA W-1 in 1 M H2SO4 [at 0.8 V vs reversible hydrogen electrode (RHE)], 4.6 mA W-1 in 1 M Na2SO4 (at 0.9 V vs RHE), and 6.8 mA W-1 in 1 M KOH (at 1.1. V vs RHE) under 275 nm illumination wavelength with an intensity of 1.3 mW cm-2. Beyond the photodetector application, 2D GaS-based PEC-type devices may find application in tandem solar PEC cells in combination with other visible-sensitive low-band-gap materials, including transition-metal monochalcogenides recently established for PEC solar energy conversion applications.
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Affiliation(s)
- Marilena
I. Zappia
- BeDimensional
Spa., via Lungotorrente
Secca 3D, 16163 Genova, Italy
- Department
of Physics, University of Calabria, Via P. Bucci cubo 31/C, 87036 Rende, CS, Italy
| | - Gabriele Bianca
- Graphene
Labs, Istituto Italiano di Tecnologia, via Morego 30, 16163 Genova, Italy
- Dipartimento
di Chimica e Chimica Industriale, Università
degli Studi di Genova, via Dodecaneso 31, 16146 Genoa, Italy
| | - Sebastiano Bellani
- BeDimensional
Spa., via Lungotorrente
Secca 3D, 16163 Genova, Italy
- Graphene
Labs, Istituto Italiano di Tecnologia, via Morego 30, 16163 Genova, Italy
| | - Nicola Curreli
- Functional
Nanosystems, Istituto Italiano di Tecnologia (IIT), via Morego 30, 16163 Genova, Italy
| | - Zdeněk Sofer
- Department
of Inorganic Chemistry, University of Chemistry
and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - Michele Serri
- Graphene
Labs, Istituto Italiano di Tecnologia, via Morego 30, 16163 Genova, Italy
| | - Leyla Najafi
- BeDimensional
Spa., via Lungotorrente
Secca 3D, 16163 Genova, Italy
- Graphene
Labs, Istituto Italiano di Tecnologia, via Morego 30, 16163 Genova, Italy
| | - Marco Piccinni
- Graphene
Labs, Istituto Italiano di Tecnologia, via Morego 30, 16163 Genova, Italy
- Dipartimento
di Chimica e Chimica Industriale, Università
degli Studi di Genova, via Dodecaneso 31, 16146 Genoa, Italy
| | - Reinier Oropesa-Nuñez
- BeDimensional
Spa., via Lungotorrente
Secca 3D, 16163 Genova, Italy
- Department
of Material Science and Engineering, Uppsala
University, Box 534, 75121 Uppsala, Sweden
| | - Petr Marvan
- Department
of Inorganic Chemistry, University of Chemistry
and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - Vittorio Pellegrini
- BeDimensional
Spa., via Lungotorrente
Secca 3D, 16163 Genova, Italy
- Graphene
Labs, Istituto Italiano di Tecnologia, via Morego 30, 16163 Genova, Italy
| | - Ilka Kriegel
- Functional
Nanosystems, Istituto Italiano di Tecnologia (IIT), via Morego 30, 16163 Genova, Italy
| | - Mirko Prato
- Materials
Characterization Facility, Istituto Italiano di Tecnologia, via Morego 30, Genova 16163, Italy
| | - Anna Cupolillo
- Department
of Physics, University of Calabria, Via P. Bucci cubo 31/C, 87036 Rende, CS, Italy
| | - Francesco Bonaccorso
- BeDimensional
Spa., via Lungotorrente
Secca 3D, 16163 Genova, Italy
- Graphene
Labs, Istituto Italiano di Tecnologia, via Morego 30, 16163 Genova, Italy
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Opoku F, Akoto O, Oppong SOB, Adimado AA. Two-dimensional layered type-II MS 2/BiOCl (M = Zr, Hf) van der Waals heterostructures: promising photocatalysts for hydrogen generation. NEW J CHEM 2021. [DOI: 10.1039/d1nj03867b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Our theoretical findings reveal that in-plane biaxial strain tunes the bandgap and induces a transition from indirect to direct semiconductor.
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Affiliation(s)
- Francis Opoku
- Department of Chemistry, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Osei Akoto
- Department of Chemistry, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | | | - Anthony Apeke Adimado
- Department of Chemistry, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
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Li XH, Wang BJ, Li H, Yang XF, Zhao RQ, Jia XT, Ke SH. Two-dimensional layered Janus-In2SeTe/C2N van der Waals heterostructures for photocatalysis and photovoltaics: first-principles calculations. NEW J CHEM 2020. [DOI: 10.1039/d0nj03296d] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Through DFT calculations, Janus-In2SeTe/C2N heterostructures are found to have great potential applications in the fields of clean and sustainable energy.
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Affiliation(s)
- Xiao-Hua Li
- School of Physics and Electronic Information Engineering
- Henan Polytechnic University
- Jiaozuo 454000
- China
| | - Bao-Ji Wang
- School of Physics and Electronic Information Engineering
- Henan Polytechnic University
- Jiaozuo 454000
- China
| | - Hui Li
- School of Physics and Electronic Information Engineering
- Henan Polytechnic University
- Jiaozuo 454000
- China
| | - Xue-Feng Yang
- School of Physics and Electronic Information Engineering
- Henan Polytechnic University
- Jiaozuo 454000
- China
| | - Rui-Qi Zhao
- School of Materials Science and Engineering
- Henan Polytechnic University
- Jiaozuo 454000
- China
| | - Xing-Tao Jia
- School of Physics and Electronic Information Engineering
- Henan Polytechnic University
- Jiaozuo 454000
- China
| | - San-Huang Ke
- MOE Key Labortoray of Microstructured Materials
- School of Physics Science and Engineering
- Tongji University
- Shanghai
- China
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Yar M, Hashmi MA, Ayub K. The C2N surface as a highly selective sensor for the detection of nitrogen iodide from a mixture of NX3 (X = Cl, Br, I) explosives. RSC Adv 2020; 10:31997-32010. [PMID: 35518175 PMCID: PMC9056556 DOI: 10.1039/d0ra04930a] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Accepted: 08/10/2020] [Indexed: 12/14/2022] Open
Abstract
Explosives are quite toxic and destructive; therefore, it is necessary to not only detect them but also remove them. The adsorption behavior of NX3 analytes (NCl3, NBr3 and NI3) over the microporous C2N surface was evaluated by DFT calculations. The nature of interactions between NX3 and C2N was characterized by adsorption energy, NCI, QTAIM, SAPT0, NBO, EDD and FMO analysis. The interaction energies of NX3 with C2N are in the range of −10.85 to −16.31 kcal mol−1 and follow the order of NCl3@C2N > NBr3@C2N > NI3@C2N, respectively. The 3D isosurfaces and 2D-RGD graph of NCI analysis qualitatively confirmed the existence of halogen bonding interactions among the studied systems. Halogen bonding was quantified by SAPT0 component energy analysis. The SAPT0 results revealed that ΔEdisp (56.75%) is the dominant contributor towards interaction energy, whereas contributions from ΔEelst and ΔEind are 29.41% and 14.34%, respectively. The QTAIM analysis also confirmed the presence of halogen bonding between atoms of NX3 and C2N surface. EDD analysis also validated NCI, QTAIM and NBO analysis. FMO analysis revealed that the adsorption of NI3 on the C2N surface caused the highest change in the EHOMO–LUMO gap (from 5.71 to 4.15 eV), and resulted in high sensitivity and selectivity of the C2N surface towards NI3, as compared to other analytes. It is worth mentioning that in all complexes, a significant difference in the EHOMO–LUMO gap was seen when electronic transitions occurred from the analyte to the C2N surface. Explosives are quite toxic and destructive; therefore, it is necessary to not only detect them but also remove them.![]()
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Affiliation(s)
- Muhammad Yar
- Department of Chemistry
- COMSATS University
- Abbottabad Campus
- Pakistan
| | | | - Khurshid Ayub
- Department of Chemistry
- COMSATS University
- Abbottabad Campus
- Pakistan
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