1
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Tsyshevsky R, McEntee M, Durke EM, Karwacki C, Kuklja MM. Degradation of Fatal Toxic Nerve Agents on Dry TiO 2. ACS APPLIED MATERIALS & INTERFACES 2021; 13:696-705. [PMID: 33350299 DOI: 10.1021/acsami.0c19261] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Despite a recent dramatically increased risk of using chemical warfare agents in chemical attacks and assassinations, fundamental interactions of toxic chemicals with other materials are poorly understood, and micromechanisms of their chemical degradation are yet to be established. This represents an outstanding challenge in both fundamental science and practical applications in combat against chemical weapons. One of the most versatile and multifunctional oxides, TiO2, has been suggested as a promising material to quickly adsorb and effectively destroy toxins. In this paper, we explore how sarin (also known as GB) adsorbs and decomposes on dry nanoparticles of TiO2 anatase and rutile phases. We found that both anatase and rutile readily adsorb sarin gas molecules because of a strong electrostatic attraction between the phosphoryl oxygen and surface titanium atoms. The sarin decomposition most likely proceeds via a propene elimination; however, the reaction is exothermic on the rutile (110) surface and endothermic on the anatase (101) surface. High energy barriers suggest that sarin would hardly decompose on pristine dry surfaces of TiO2, and degradation reactions can be triggered by defects or contaminants under realistic operational conditions.
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Affiliation(s)
- Roman Tsyshevsky
- Materials Science and Engineering Department, University of Maryland, College Park, Maryland 20742, United States
| | - Monica McEntee
- US Army Combat Capabilities Development Command Chemical Biological Center, 8198 Blackhawk Road, Aberdeen Proving Ground, Maryland 21010, United States
| | - Erin M Durke
- US Army Combat Capabilities Development Command Chemical Biological Center, 8198 Blackhawk Road, Aberdeen Proving Ground, Maryland 21010, United States
| | - Christopher Karwacki
- US Army Combat Capabilities Development Command Chemical Biological Center, 8198 Blackhawk Road, Aberdeen Proving Ground, Maryland 21010, United States
| | - Maija M Kuklja
- Materials Science and Engineering Department, University of Maryland, College Park, Maryland 20742, United States
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2
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Influences of MgO(001) and TiO2(101) Supports on the Structures and Properties of Au Nanoclusters. Catalysts 2019. [DOI: 10.3390/catal10010016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Due to the unique structures, photoelectric properties, good catalytic activity, and broad potential applications, gold nanoclusters (Au n ) received extensive attention in catalysis, bioengineering, environmental engineering, and so on. In the present work, the structures and properties of Au n adsorbed on the MgO(001) and TiO 2 (101) surfaces were investigated by density functional theory. The results showed that the catalytic properties of Au n will be enhanced when Au n is adsorbed on certain supports. Because the difference of the outer electronic structure of metals in supports, the direction of the charge transfer was different, thus inducing the different charge distribution on Au n . When Au n was adsorbed on MgO(001) [TiO 2 (101)] surface, Au n will have negative [positive] charges and thus higher catalytic activity in oxidation [reduction] reaction. The variation of surface charges caused by the support makes Au n possess different catalytic activity in different systems. Moreover, the electronic structure of the support will make an obvious influence on the s and d density of states of Au n , which should be the intrinsic reason that induces the variations of its structure and properties. These results should be an important theoretical reference for designing Au n as the photocatalyst applied to the different oxidation and reduction reactions.
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3
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Optimal methodology for explicit solvation prediction of band edges of transition metal oxide photocatalysts. Commun Chem 2019. [DOI: 10.1038/s42004-019-0179-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
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4
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Zheng T, Wu C, Chen M, Zhang Y, Cummings PT. A DFT study of water adsorption on rutile TiO2 (110) surface: The effects of surface steps. J Chem Phys 2016; 145:044702. [DOI: 10.1063/1.4958969] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Ting Zheng
- State Key Laboratory of Robotics and System, and School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, People’s Republic of China
- Department of Chemical and Biomolecular Engineering, and Multiscale Modeling and Simulation Center, Vanderbilt University, Nashville, Tennessee 37235-1604, USA
| | - Chunya Wu
- State Key Laboratory of Robotics and System, and School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, People’s Republic of China
| | - Mingjun Chen
- State Key Laboratory of Robotics and System, and School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, People’s Republic of China
| | - Yu Zhang
- Department of Chemical and Biomolecular Engineering, and Multiscale Modeling and Simulation Center, Vanderbilt University, Nashville, Tennessee 37235-1604, USA
| | - Peter T. Cummings
- Department of Chemical and Biomolecular Engineering, and Multiscale Modeling and Simulation Center, Vanderbilt University, Nashville, Tennessee 37235-1604, USA
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Da Pieve F, Stankowski M, Hogan C. Electronic structure calculations of mercury mobilization from mineral phases and photocatalytic removal from water and the atmosphere. THE SCIENCE OF THE TOTAL ENVIRONMENT 2014; 493:596-605. [PMID: 24982025 DOI: 10.1016/j.scitotenv.2014.06.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/01/2014] [Revised: 06/03/2014] [Accepted: 06/03/2014] [Indexed: 06/03/2023]
Abstract
Mercury is a hazardous environmental pollutant mobilized from natural sources, and anthropogenically contaminated and disturbed areas. Current methods to assess mobility and environmental impact are mainly based on field measurements, soil monitoring, and kinetic modelling. In order to understand in detail the extent to which different mineral sources can give rise to mercury release it is necessary to investigate the complexity at the microscopic level and the possible degradation/dissolution processes. In this work, we investigated the potential for mobilization of mercury structurally trapped in three relevant minerals occurring in hot spring environments and mining areas, namely, cinnabar (α-HgS), corderoite (α-Hg3S2Cl2), and mercuric chloride (HgCl2). Quantum chemical methods based on density functional theory as well as more sophisticated approaches are used to assess the possibility of a) direct photoreduction and formation of elemental Hg at the surface of the minerals, providing a path for ready release in the environment; and b) reductive dissolution of the minerals in the presence of solutions containing halogens. Furthermore, we study the use of TiO2 as a potential photocatalyst for decontamination of polluted waters (mainly Hg(2+)-containing species) and air (atmospheric Hg(0)). Our results partially explain the observed pathways of Hg mobilization from relevant minerals and the microscopic mechanisms behind photocatalytic removal of Hg-based pollutants. Possible sources of disagreement with observations are discussed and further improvements to our approach are suggested.
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Affiliation(s)
- Fabiana Da Pieve
- Université libre de Bruxelles (U.L.B.), Boulevard du Triomphe, CP 231, Campus Plaine, B-1050 Bruxelles, Belgium.
| | - Martin Stankowski
- LU Open Innovation Center, Lund University, Box 117, SE-221 00 Lund, Sweden; European Theoretical Spectroscopy Facility (ETSF)
| | - Conor Hogan
- European Theoretical Spectroscopy Facility (ETSF); Consiglio Nazionale delle Ricerche, Istituto di Struttura della Materia (CNR-ISM), University of Rome "Tor Vergata", via Fosso del Cavaliere 100, 00133 Rome, Italy; Physics Department, University of Rome "Tor Vergata", via Fosso del Cavaliere 100, 00133 Rome, Italy
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6
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Lozovoi AY, Pashov DL, Sheppard TJ, Kohanoff JJ, Paxton AT. Universal tight binding model for chemical reactions in solution and at surfaces. III. Stoichiometric and reduced surfaces of titania and the adsorption of water. J Chem Phys 2014; 141:044505. [DOI: 10.1063/1.4890492] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- A. Y. Lozovoi
- Atomistic Simulation Centre, School of Mathematics and Physics, Queen's University Belfast, Belfast BT7 1NN, Northern Ireland, United Kingdom
| | - D. L. Pashov
- Department of Physics, King's College London, Strand, London WC2R 2LS, United Kingdom
| | - T. J. Sheppard
- Atomistic Simulation Centre, School of Mathematics and Physics, Queen's University Belfast, Belfast BT7 1NN, Northern Ireland, United Kingdom
| | - J. J. Kohanoff
- Atomistic Simulation Centre, School of Mathematics and Physics, Queen's University Belfast, Belfast BT7 1NN, Northern Ireland, United Kingdom
| | - A. T. Paxton
- Department of Physics, King's College London, Strand, London WC2R 2LS, United Kingdom
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7
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O'Rourke C, Bowler DR. DSSC anchoring groups: a surface dependent decision. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2014; 26:195302. [PMID: 24762339 DOI: 10.1088/0953-8984/26/19/195302] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Electrodes in dye sensitised solar cells are typically nanocrystalline anatase TiO2 with a majority (1 0 1) surface exposed. Generally the sensitising dye employs a carboxylic anchoring moiety through which it adheres to the TiO₂ surface. Recent interest in exploiting the properties of differing TiO₂ electrode morphologies, such as rutile nanorods exposing the (1 1 0) surface and anatase electrodes with high percentages of the (0 0 1) surface exposed, begs the question of whether this anchoring strategy is best, irrespective of the majority surface exposed. Here we address this question by presenting density functional theory calculations contrasting the binding properties of two promising anchoring groups, phosphonic acid and boronic acid, to that of carboxylic acid. Anchor-electrode interactions are studied for the prototypical anatase (1 0 1) surface, along with the anatase (0 0 1) and rutile (1 1 0) surfaces. Finally the effect of using these alternative anchoring groups to bind a typical coumarin dye (NKX-2311) to these TiO₂ substrates is examined. Significant differences in the binding properties are found depending on both the anchor and surface, illustrating that the choice of anchor is necessarily dependent upon the surface exposed in the electrode. In particular the boronic acid is found to show the potential to be an excellent anchor choice for electrodes exposing the anatase (0 0 1) surface.
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Affiliation(s)
- C O'Rourke
- London Centre for Nanotechnology, 17-19 Gordon St, WC1H 0AH, London. Department of Physics & Astronomy, University College London, Gower St, WC1E 6BT, London. UCL Satellite, International Centre for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
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8
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Kang SN, Jeong CM, Jeon YC, Byon ES, Jeong YS, Cho LR. Effects of Mg-ion and Ca-ion implantations on P. gingivalis and F. nucleatum adhesion. Tissue Eng Regen Med 2014. [DOI: 10.1007/s13770-013-1104-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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9
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Stausholm-Møller J, Kristoffersen HH, Martinez U, Hammer B. A density functional theory study of atomic steps on stoichiometric rutile TiO2(110). J Chem Phys 2013; 139:234704. [DOI: 10.1063/1.4840515] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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10
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Shibuya T, Yasuoka K, Mirbt S, Sanyal B. A systematic study of polarons due to oxygen vacancy formation at the rutile TiO2(110) surface by GGA + U and HSE06 methods. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2012; 24:435504. [PMID: 23032600 DOI: 10.1088/0953-8984/24/43/435504] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The polaronic nature of excess electrons accompanying an oxygen vacancy in a TiO(2)(110) surface has been studied by several theoretical approaches. According to previous studies, DFT + U and hybrid functional methods predict different sites of localization of the polarons. In this paper, we conducted a thorough comparison of the results obtained by GGA + U (generalized gradient approximation + Hubbard U) and HSE06 (Heyd-Scuseria-Ernzerhof hybrid functional) approximations. Considering initial symmetry breaking in the geometry optimization process, we show that regardless of the approximations used, electrons localize at two particular subsurface Ti sites in a state with mixed d(x(2)-y(2))/d(z(2)) character in the global coordinate frame with a spatial extent of the order of 7 Å. The lowest state of the polarons is a singlet, but the triplet is only about 0.1 meV higher in energy. Our results agree with previous experiments and calculations, wherever available. We stress that the hybrid functional has been first applied on this surface with a realistic coverage of oxygen vacancies corresponding to the experimental situation (~12.5%).
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Affiliation(s)
- Taizo Shibuya
- Department of Mechanical Engineering, Keio University, Yokohama 223-8522, Japan
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11
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Mellan TA, Grau-Crespo R. Density functional theory study of rutile VO2 surfaces. J Chem Phys 2012; 137:154706. [DOI: 10.1063/1.4758319] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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12
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Hardcastle TP, Brydson RMD, Livi KJT, Seabourne CR, Scott AJ. Ab-initio modelling, polarity and energetics of clean rutile surfaces in vacuum and comparison with water environment. ACTA ACUST UNITED AC 2012. [DOI: 10.1088/1742-6596/371/1/012059] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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13
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Muir JN, Choi Y, Idriss H. Computational study of ethanol adsorption and reaction over rutile TiO2 (110) surfaces. Phys Chem Chem Phys 2012; 14:11910-9. [DOI: 10.1039/c2cp40641a] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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14
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Guo XJ, Liu W, Fang W, Cai L, Zhu Y, Lu L, Lu X. DFT study of coverage-depended adsorption of NH3 on TiO2-B (100) surface. Phys Chem Chem Phys 2012; 14:16618-25. [DOI: 10.1039/c2cp41124e] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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15
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Sorescu DC, Lee J, Al-Saidi WA, Jordan KD. CO2 adsorption on TiO2(110) rutile: Insight from dispersion-corrected density functional theory calculations and scanning tunneling microscopy experiments. J Chem Phys 2011; 134:104707. [DOI: 10.1063/1.3561300] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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16
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Howard KL, Willock DJ. A periodic DFT study of the activation of O2 by Au nanoparticles on α-Fe2O3. Faraday Discuss 2011; 152:135-51; discussion 203-25. [DOI: 10.1039/c1fd00026h] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Acetonitrile adsorption and decomposition on the SnO2 (110) surface: a first-principles computation. Theor Chem Acc 2010. [DOI: 10.1007/s00214-010-0755-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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18
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Fox H, Newman KE, Schneider WF, Corcelli SA. Bulk and Surface Properties of Rutile TiO2 from Self-Consistent-Charge Density Functional Tight Binding. J Chem Theory Comput 2010; 6:499-507. [DOI: 10.1021/ct900665a] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- H. Fox
- Department of Chemistry and Biochemistry, Department of Physics, Department of Chemical and Biomolecular Engineering, and Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556
| | - K. E. Newman
- Department of Chemistry and Biochemistry, Department of Physics, Department of Chemical and Biomolecular Engineering, and Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556
| | - W. F. Schneider
- Department of Chemistry and Biochemistry, Department of Physics, Department of Chemical and Biomolecular Engineering, and Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556
| | - S. A. Corcelli
- Department of Chemistry and Biochemistry, Department of Physics, Department of Chemical and Biomolecular Engineering, and Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556
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19
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Abstract
Surface structures of rutile TiO(2) (011) are determined by a combination of noncontact atomic force microscopy (NC-AFM), scanning tunneling microscopy (STM), and density functional calculations. The surface exhibits rowlike (n x 1) structures running along the [01] direction. Microfaceting missing-row structural models can explain the experimental results very well. Calculated images for NC-AFM and STM are in good agreement with the experimental results. A decrease of the density of dangling bonds stabilizes the surface energy, which results in the microfaceting missing-row reconstructions.
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Affiliation(s)
- Toshitaka Kubo
- National Institute of Advanced Industrial Science and Technology, Tsukuba Central 5-2, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan.
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