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Shi X, Zhang M, Wang X, Kistanov AA, Li T, Cao W, Huttula M. Nickel nanoparticle-activated MoS 2 for efficient visible light photocatalytic hydrogen evolution. NANOSCALE 2022; 14:8601-8610. [PMID: 35543218 PMCID: PMC9219418 DOI: 10.1039/d2nr01489k] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Accepted: 04/28/2022] [Indexed: 06/14/2023]
Abstract
Direct sunlight-induced water splitting for photocatalytic hydrogen evolution is the dream for an ultimate clean energy source. So far, typical photocatalysts require complicated synthetic processes and barely work without additives or electrolytes. Here, we report the realization of a hydrogen evolution strategy with a novel Ni-Ag-MoS2 ternary nanocatalyst under visible/sun light. Synthesized through an ultrasound-assisted wet method, the composite exhibits stable catalytic activity for long-term hydrogen production from both pure and natural water. A high efficiency of 73 μmol g-1 W-1 h-1 is achieved with only a visible light source and the (MoS2)84Ag10Ni6 catalyst, matching the values of present additive-enriched photocatalysts. Verified by experimental characterizations and first-principles calculations, the enhanced photocatalytic ability is attributed to effective charge migration through the dangling bonds at the Ni-Ag-MoS2 alloy interface and the activation of the MoS2 basal planes.
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Affiliation(s)
- Xinying Shi
- Nano and Molecular Systems Research Unit, University of Oulu, P.O. Box 3000, FI-90014, Oulu, Finland.
- School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China
| | - Meng Zhang
- Department of Physics, East China University of Science and Technology, Shanghai 200237, China.
| | - Xiao Wang
- Department of Physics, East China University of Science and Technology, Shanghai 200237, China.
| | - Andrey A Kistanov
- Nano and Molecular Systems Research Unit, University of Oulu, P.O. Box 3000, FI-90014, Oulu, Finland.
| | - Taohai Li
- Nano and Molecular Systems Research Unit, University of Oulu, P.O. Box 3000, FI-90014, Oulu, Finland.
- College of Chemistry, Key Lab of Environment Friendly Chemistry and Application in Ministry of Education, Xiangtan University, Xiangtan 411105, China
| | - Wei Cao
- Nano and Molecular Systems Research Unit, University of Oulu, P.O. Box 3000, FI-90014, Oulu, Finland.
| | - Marko Huttula
- Nano and Molecular Systems Research Unit, University of Oulu, P.O. Box 3000, FI-90014, Oulu, Finland.
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Obodo KO, Ouma CNM, Obodo JT, Gebreyesus G, Rai DP, Ukpong AM, Bouhafs B. Sn 3C 2monolayer with transition metal adatom for gas sensing: a density functional theory studies. NANOTECHNOLOGY 2021; 32:355502. [PMID: 34034245 DOI: 10.1088/1361-6528/ac04d0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Accepted: 05/25/2021] [Indexed: 06/12/2023]
Abstract
The gas sensing properties of pristine Sn3C2monolayer and different transition metal adatom (TM-Sn3C2, where TM = Fe, Co, Ni, Cu, Ru, Rh, Pd and Ag) was investigated using van der Waals corrected density functional theory. The understanding and potential of use of Sn3C2monolayers as sensors or adsorbent for CO, CO2, NO, NO2and SO2gaseous molecules is evaluated by calculating the adsorption and desorption energetics. From the calculated adsorption energies, we found that the pristine Sn3C2monolayer and 3dTM has desirable properties for removal of the considered molecules based on their high adsorption energy, however the 4dTM is applicable as recoverable sensors. We applied an Arrhenius-type equation to evaluate the recovery time for the desorption of the molecules on the pristine and TM adatom on Sn3C2monolayer. We found that the negative adsorption energies from -1 to -2 eV of the molecules resulted in easier recovery of the adsorbed gases at reasonable temperatures compared to adsorption energies in between 0 and -1 eV (weakly physiosorbed) and below -2 eV (strongly chemisorbed). Hence, we obtained that the Rh-Sn3C2, Ru-Sn3C2, Pd-Sn3C2, Pd-Sn3C2, and Rh-Sn3C2monolayers are good recoverable scavengers for the CO, CO2, NO, NO2, and SO2molecules. The current theoretical calculations provide new insight on the effect of TM adatoms on the structural, electronic, and magnetic properties of the Sn3C2monolayer and different transition metal adatom as well as shed light on their application as gas sensors/scavengers.
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Affiliation(s)
- K O Obodo
- HySA Infrastructure Centre of Competence, Faculty of Engineering, North-West University (NWU), P. Bag X6001, Potchefstroom, 2520, South Africa
| | - C N M Ouma
- HySA Infrastructure Centre of Competence, Faculty of Engineering, North-West University (NWU), P. Bag X6001, Potchefstroom, 2520, South Africa
| | - J T Obodo
- Physics Department, University of Nigeria, Nsukka, Nigeria
| | - G Gebreyesus
- Department of Physics, School of Physical and Mathematical Sciences, College of Basic and Applied Sciences, University of Ghana, Ghana
| | - D P Rai
- Physical Sciences Research Center (PSRC), Pachhunga University College Aizawl, Mizoram, 796001, India
| | - A M Ukpong
- Theoretical and computational Condensed Matter and Materials Physics Group, School of Chemistry and Physics, University of Kwazulu-Natal, Pietermaritzburg, South Africa
| | - B Bouhafs
- Laboratoire de Modélisation et Simulation en Sciences des Matériaux, Université Djillali Liabés de Sidi Bel-Abbés, Sidi Bel-Abbés, 22000, Algeria
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Shi X, Posysaev S, Huttula M, Pankratov V, Hoszowska J, Dousse JC, Zeeshan F, Niu Y, Zakharov A, Li T, Miroshnichenko O, Zhang M, Wang X, Huang Z, Saukko S, González DL, van Dijken S, Alatalo M, Cao W. Metallic Contact between MoS 2 and Ni via Au Nanoglue. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:e1704526. [PMID: 29687601 DOI: 10.1002/smll.201704526] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2017] [Revised: 03/01/2018] [Indexed: 05/10/2023]
Abstract
A critical factor for electronics based on inorganic layered crystals stems from the electrical contact mode between the semiconducting crystals and the metal counterparts in the electric circuit. Here, a materials tailoring strategy via nanocomposite decoration is carried out to reach metallic contact between MoS2 matrix and transition metal nanoparticles. Nickel nanoparticles (NiNPs) are successfully joined to the sides of a layered MoS2 crystal through gold nanobuffers, forming semiconducting and magnetic NiNPs@MoS2 complexes. The intrinsic semiconducting property of MoS2 remains unchanged, and it can be lowered to only few layers. Chemical bonding of the Ni to the MoS2 host is verified by synchrotron radiation based photoemission electron microscopy, and further proved by first-principles calculations. Following the system's band alignment, new electron migration channels between metal and the semiconducting side contribute to the metallic contact mechanism, while semiconductor-metal heterojunctions enhance the photocatalytic ability.
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Affiliation(s)
- Xinying Shi
- Nano and Molecular Systems Research Unit, University of Oulu, P.O. Box 3000, FI-90014, Oulu, Finland
| | - Sergei Posysaev
- Nano and Molecular Systems Research Unit, University of Oulu, P.O. Box 3000, FI-90014, Oulu, Finland
| | - Marko Huttula
- Nano and Molecular Systems Research Unit, University of Oulu, P.O. Box 3000, FI-90014, Oulu, Finland
| | - Vladimir Pankratov
- Nano and Molecular Systems Research Unit, University of Oulu, P.O. Box 3000, FI-90014, Oulu, Finland
| | - Joanna Hoszowska
- Department of Physics, University of Fribourg, Ch. du Musée 3, CH-1700, Fribourg, Switzerland
| | - Jean-Claude Dousse
- Department of Physics, University of Fribourg, Ch. du Musée 3, CH-1700, Fribourg, Switzerland
| | - Faisal Zeeshan
- Department of Physics, University of Fribourg, Ch. du Musée 3, CH-1700, Fribourg, Switzerland
| | - Yuran Niu
- MAX IV Laboratory, Lund University, P.O. Box 118, 22100, Lund, Sweden
| | - Alexei Zakharov
- MAX IV Laboratory, Lund University, P.O. Box 118, 22100, Lund, Sweden
| | - Taohai Li
- College of Chemistry, Key Lab of Environment Friendly Chemistry and Application in Ministry of Education, Xiangtan University, Xiangtan, 411105, China
| | - Olga Miroshnichenko
- Nano and Molecular Systems Research Unit, University of Oulu, P.O. Box 3000, FI-90014, Oulu, Finland
| | - Meng Zhang
- Department of Physics, East China University of Science and Technology, Shanghai, 200237, China
| | - Xiao Wang
- Department of Physics, East China University of Science and Technology, Shanghai, 200237, China
| | - Zhongjia Huang
- School of Mechanical and Automotive Engineering, Anhui Polytechnic University, Wuhu, 241000, China
| | - Sami Saukko
- Center of Microscopy and Nanotechnology, University of Oulu, P.O. Box 7150, FI-90014, Oulu, Finland
| | - Diego López González
- NanoSpin, Department of Applied Physics, Aalto University School of Science, P.O. Box 15100, FI-00076, Aalto, Finland
| | - Sebastiaan van Dijken
- NanoSpin, Department of Applied Physics, Aalto University School of Science, P.O. Box 15100, FI-00076, Aalto, Finland
| | - Matti Alatalo
- Nano and Molecular Systems Research Unit, University of Oulu, P.O. Box 3000, FI-90014, Oulu, Finland
| | - Wei Cao
- Nano and Molecular Systems Research Unit, University of Oulu, P.O. Box 3000, FI-90014, Oulu, Finland
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Ávalos-Ovando O, Mastrogiuseppe D, Ulloa SE. Long range of indirect exchange interaction on the edges of MoS 2 flakes. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2018; 30:045801. [PMID: 29300705 DOI: 10.1088/1361-648x/aaa20a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We study the Ruderman-Kittel-Kasuya-Yosida interaction between two magnetic impurities connected to the edges of zigzag-terminated MoS2 flakes. When the impurities lie on the edges of the flake, the effective exchange interaction exhibits sizable noncollinear Dzyaloshinskii-Moriya character that competes with a strong Ising coupling. We analyze the characteristic decay exponent for doping levels inside the band gap of the infinite layer, corresponding to edge states of the flake at the Fermi level. The characteristic exponents show sub-two-dimensional behavior for these band fillings, with decays much slower than quadratic. The Ising interaction has effectively one-dimensional long range, while the noncollinear component that grows for short impurity separation becomes comparable in magnitude. The resulting tunable exchange interaction on these systems opens the way for the study of interesting phases of impurity arrays with long-range stable helical order.
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Affiliation(s)
- O Ávalos-Ovando
- Department of Physics and Astronomy, and Nanoscale and Quantum Phenomena Institute, Ohio University, Athens, OH 45701-2979, United States of America
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