1
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Hur DH, Han J, Lee JH, Jeon SH, Shim HS. A New Mechanism for the Inhibition of SA106 Gr.B Carbon Steel Corrosion by Nitrite in Alkaline Water. MATERIALS (BASEL, SWITZERLAND) 2024; 17:4470. [PMID: 39336211 PMCID: PMC11432826 DOI: 10.3390/ma17184470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2024] [Revised: 09/05/2024] [Accepted: 09/10/2024] [Indexed: 09/30/2024]
Abstract
The purpose of this study was to investigate the composition of oxide films formed on SA106 Gr.B carbon steel in nitrite solutions at 35 °C for 1000 h. The product of the reduction of nitrite during the corrosion inhibition process was also examined. The X-ray photoelectron spectroscopy results revealed that a thin Fe3O4 film was formed and ammonium ions were adsorbed on the outermost surface of the oxide film. The presence of ammonium ions was also demonstrated by ion chromatography. These results indicate that nitrites are reduced to ammonium ions, which in turn promotes the formation of the protective Fe3O4 film.
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Affiliation(s)
- Do-Haeng Hur
- Materials Safety Technology Development Division, Korea Atomic Energy Research Institute, Daejeon 34057, Republic of Korea
| | - Jeoh Han
- Materials Safety Technology Development Division, Korea Atomic Energy Research Institute, Daejeon 34057, Republic of Korea
| | | | - Soon-Hyeok Jeon
- Materials Safety Technology Development Division, Korea Atomic Energy Research Institute, Daejeon 34057, Republic of Korea
| | - Hee-Sang Shim
- Materials Safety Technology Development Division, Korea Atomic Energy Research Institute, Daejeon 34057, Republic of Korea
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2
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Yang C, Wang J, Xia X, Ding L, Wen Y, Zhao T, Ke X, Gong XQ, Wu XP, Ding W, Peng L. Can Subsurface Oxygen Species in Oxides Participate in Catalytic Reactions? An 17O Solid-State Nuclear Magnetic Resonance Study. J Phys Chem Lett 2024; 15:8218-8223. [PMID: 39101894 DOI: 10.1021/acs.jpclett.4c01926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/06/2024]
Abstract
The impacts of subsurface species of catalysts on reaction processes are still under debate, largely due to a lack of characterization methods for distinguishing these species from the surface species and the bulk. By using 17O solid-state nuclear magnetic resonance (NMR) spectroscopy, which can distinguish subsurface oxygen ions in CeO2 (111) nanorods, we explore the effects of subsurface species of oxides in CO oxidation reactions. The intensities of the 17O NMR signals due to surface and subsurface oxygen ions decrease after the introduction of CO into CeO2 nanorods, with a more significant decrease observed for the latter, confirming the participation of subsurface oxygen species. Density functional theory calculations show that the reaction involves subsurface oxygen ions filling the surface oxygen vacancies created by the direct contact of surface oxygen with CO. This new approach can be extended to the study of the role of oxygen species in other catalytic reactions.
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Affiliation(s)
- Changju Yang
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education and Collaborative Innovation Center of Chemistry for Life Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Jia Wang
- State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, East China University of Science and Technology, Shanghai 200237, China
| | - Xiaoli Xia
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education and Collaborative Innovation Center of Chemistry for Life Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Liping Ding
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education and Collaborative Innovation Center of Chemistry for Life Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Yujie Wen
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education and Collaborative Innovation Center of Chemistry for Life Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Taotao Zhao
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education and Collaborative Innovation Center of Chemistry for Life Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Xiaokang Ke
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education and Collaborative Innovation Center of Chemistry for Life Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Xue-Qing Gong
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Xin-Ping Wu
- State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, East China University of Science and Technology, Shanghai 200237, China
| | - Weiping Ding
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education and Collaborative Innovation Center of Chemistry for Life Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Luming Peng
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education and Collaborative Innovation Center of Chemistry for Life Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
- Jiangsu Key Laboratory of Vehicle Emissions Control, Nanjing University, Nanjing 210093, China
- Frontiers Science Center for Critical Earth Material Cycling (FSC-CEMaC), Nanjing University, Nanjing, Jiangsu 210023, China
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3
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Szewczyk J, Iatsunskyi I, Michałowski PP, Załęski K, Lamboux C, Sayegh S, Makhoul E, Cabot A, Chang X, Bechelany M, Coy E. TiO 2/PDA Multilayer Nanocomposites with Exceptionally Sharp Large-Scale Interfaces and Nitrogen Doping Gradient. ACS APPLIED MATERIALS & INTERFACES 2024; 16:10774-10784. [PMID: 38350850 PMCID: PMC10910457 DOI: 10.1021/acsami.3c18935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Revised: 02/02/2024] [Accepted: 02/05/2024] [Indexed: 02/15/2024]
Abstract
The evolving field of photocatalysis requires the development of new functional materials, particularly those suitable for large-scale commercial systems. One particularly promising approach is the creation of hybrid organic/inorganic materials. Despite being extensively studied, materials such as polydopamine (PDA) and titanium oxide continue to show significant promise for use in such applications. Nitrogen-doped titanium oxide and free-standing PDA films obtained at the air/water interface are particularly interesting. This study introduces a straightforward and reproducible approach for synthesizing a novel class of large-scale multilayer nanocomposites. The method involves the alternate layering of high-quality materials at the air/water interface combined with precise atomic layer deposition techniques, resulting in a gradient nitrogen doping of titanium oxide layers with exceptionally sharp oxide/polymer interfaces. The analysis confirmed the presence of nitrogen in the interstitial and substitutional sites of the TiO2 lattice while maintaining the 2D-like structure of the PDA films. These chemical and structural characteristics translate into a reduction of the band gap by over 0.63 eV and an increase in the photogenerated current by over 60% compared with pure amorphous TiO2. Furthermore, the nanocomposites demonstrate excellent stability during the 1 h continuous photocurrent generation test.
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Affiliation(s)
- Jakub Szewczyk
- NanoBioMedical
Centre, Adam Mickiewicz University, Wszechnicy Piastowskiej 3, 61-614 Poznan, Poland
- Institut
Européen des Membranes, IEM, UMR 5635, Univ Montpellier, CNRS, ENSCM Place Eugène Bataillon, 34095 Montpellier
Cedex 5, France
| | - Igor Iatsunskyi
- NanoBioMedical
Centre, Adam Mickiewicz University, Wszechnicy Piastowskiej 3, 61-614 Poznan, Poland
| | - Paweł Piotr Michałowski
- Łukasiewicz
Research Network—Institute of Microelectronics and Photonics, Aleja Lotników 32/46, 02-668 Warsaw, Poland
| | - Karol Załęski
- NanoBioMedical
Centre, Adam Mickiewicz University, Wszechnicy Piastowskiej 3, 61-614 Poznan, Poland
| | - Cassandre Lamboux
- Institut
Européen des Membranes, IEM, UMR 5635, Univ Montpellier, CNRS, ENSCM Place Eugène Bataillon, 34095 Montpellier
Cedex 5, France
| | - Syreina Sayegh
- Institut
Européen des Membranes, IEM, UMR 5635, Univ Montpellier, CNRS, ENSCM Place Eugène Bataillon, 34095 Montpellier
Cedex 5, France
| | - Elissa Makhoul
- Institut
Européen des Membranes, IEM, UMR 5635, Univ Montpellier, CNRS, ENSCM Place Eugène Bataillon, 34095 Montpellier
Cedex 5, France
| | - Andreu Cabot
- Advanced
Materials Department, Catalonia Institute
for Energy Research (IREC), Sant Adrià de Besòs, 08930 Barcelona, Spain
- ICREA, Pg. Lluís Companys 23, 08010 Barcelona, Spain
| | - Xingqi Chang
- Advanced
Materials Department, Catalonia Institute
for Energy Research (IREC), Sant Adrià de Besòs, 08930 Barcelona, Spain
| | - Mikhael Bechelany
- Institut
Européen des Membranes, IEM, UMR 5635, Univ Montpellier, CNRS, ENSCM Place Eugène Bataillon, 34095 Montpellier
Cedex 5, France
- Gulf University
for Science and Technology, GUST, 32093 Hawally, Kuwait
| | - Emerson Coy
- NanoBioMedical
Centre, Adam Mickiewicz University, Wszechnicy Piastowskiej 3, 61-614 Poznan, Poland
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4
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Del Castillo-Velilla I, Sousaraei A, Romero-Muñiz I, Castillo-Blas C, S J Méndez A, Oropeza FE, de la Peña O'Shea VA, Cabanillas-González J, Mavrandonakis A, Platero-Prats AE. Synergistic binding sites in a metal-organic framework for the optical sensing of nitrogen dioxide. Nat Commun 2023; 14:2506. [PMID: 37130858 PMCID: PMC10154382 DOI: 10.1038/s41467-023-38170-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Accepted: 04/19/2023] [Indexed: 05/04/2023] Open
Abstract
Luminescent metal-organic frameworks are an emerging class of optical sensors, able to capture and detect toxic gases. Herein, we report the incorporation of synergistic binding sites in MOF-808 through post-synthetic modification with copper for optical sensing of NO2 at remarkably low concentrations. Computational modelling and advanced synchrotron characterization tools are applied to elucidate the atomic structure of the copper sites. The excellent performance of Cu-MOF-808 is explained by the synergistic effect between the hydroxo/aquo-terminated Zr6O8 clusters and the copper-hydroxo single sites, where NO2 is adsorbed through combined dispersive- and metal-bonding interactions.
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Affiliation(s)
- Isabel Del Castillo-Velilla
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - Ahmad Sousaraei
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - Ignacio Romero-Muñiz
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - Celia Castillo-Blas
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - Alba S J Méndez
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607, Hamburg, Germany
| | - Freddy E Oropeza
- Photoactivated Processes Unit, IMDEA Energy, Parque Tecnológico de Móstoles, Avenida Ramón de la Sagra 3, 28935, Móstoles, Madrid, Spain
| | - Víctor A de la Peña O'Shea
- Photoactivated Processes Unit, IMDEA Energy, Parque Tecnológico de Móstoles, Avenida Ramón de la Sagra 3, 28935, Móstoles, Madrid, Spain
| | - Juan Cabanillas-González
- Madrid Institute for Advanced Studies, IMDEA Nanociencia, c/ Faraday 9, Campus de Cantoblanco, 28049, Madrid, Spain
| | - Andreas Mavrandonakis
- Electrochemical Processes Unit, IMDEA Energy, Parque Tecnológico de Móstoles, Avda. Ramón de la Sagra 3, 28935, Móstoles, Spain.
| | - Ana E Platero-Prats
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, 28049, Madrid, Spain.
- Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049, Madrid, Spain.
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049, Madrid, Spain.
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5
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Ma C, Wei J, Jiang K, Chen J, Yang Z, Yang X, Yu G, Zhang C, Li X. Typical layered structure bismuth-based photocatalysts for photocatalytic nitrogen oxides oxidation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 855:158644. [PMID: 36096216 DOI: 10.1016/j.scitotenv.2022.158644] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 09/03/2022] [Accepted: 09/06/2022] [Indexed: 06/15/2023]
Abstract
Traditional NOx treatment methods require external reducing reagents and harsh reaction conditions, which is not conducive to effectively eliminate NOx at low concentration, especially at ppb levels. Fortunately, low concentration NOx can be removed by photocatalytic oxidation under mild reaction conditions. Bismuth (Bi)-based photocatalysts with the layered structure have obtained considerable concerns of photocatalytic NOx oxidation. This review focused on typical layered Bi-based photocatalysts (Bi2WO6, Bi2O2CO3, BiOY (YCl, Br, and I), BiOIO3, and BiOCOOH) with the structure of [Bi2O2]2+ layer for photocatalytic NOx oxidation. The strategies (morphological control, defect engineering, heterostructure construction, etc.) to improve photocatalytic oxidation activity were summarized. Furthermore, the mechanism involving various free radicals (hydroxyl radical, superoxide radical, etc.) of photocatalytic oxidation of NOx was proposed. In addition, the non-NO2 selectivity was also illuminated. Lastly, the current drawbacks and further research directions for photocatalytic NOx oxidation were elaborated. The development of photocatalysts with high photocatalytic activity, wide light absorption range, and non-NO2 selectivity is the focus of future research. This review aims to provide a pandect and theoretical guidance for the practical application of photocatalytic oxidation of NOx.
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Affiliation(s)
- Chi Ma
- College of Environmental Science & Engineering, Hunan University, Changsha 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Jingjing Wei
- College of Environmental Science & Engineering, Hunan University, Changsha 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Kainian Jiang
- Yongzhou Environmental Monitoring Station, Yongzhou 425000, China
| | - Jiaqi Chen
- Zhuzhou water Investment Group Co., Ltd., Zhuzhou 412000, China
| | - Zhongzhu Yang
- College of Environmental Science & Engineering, Hunan University, Changsha 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Xu Yang
- College of Environmental Science & Engineering, Hunan University, Changsha 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Guanlong Yu
- School of Hydraulic and Environmental Engineering, Changsha University of Science & Technology, Changsha 410076, China
| | - Chang Zhang
- College of Environmental Science & Engineering, Hunan University, Changsha 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China.
| | - Xin Li
- College of Environmental Science & Engineering, Hunan University, Changsha 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China.
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6
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Deploying Radical Inter-Transition from •OH to Supported NO3• on Mono-Dentate NO3--Modified ZrO2 to Sustain Fragmentation of Aqueous Contaminants. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2023.123146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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7
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Ghoshal S, Ghosh A, Roy P, Ball B, Pramanik A, Sarkar P. Recent Progress in Computational Design of Single-Atom/Cluster Catalysts for Electrochemical and Solar-Driven N 2 Fixation. ACS Catal 2022. [DOI: 10.1021/acscatal.2c04527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Sourav Ghoshal
- Department of Chemistry, Visva-Bharati University, Santiniketan731 235, India
| | - Atish Ghosh
- Department of Chemistry, Visva-Bharati University, Santiniketan731 235, India
| | - Prodyut Roy
- Department of Chemistry, Visva-Bharati University, Santiniketan731 235, India
| | - Biswajit Ball
- Department of Chemistry, Visva-Bharati University, Santiniketan731 235, India
| | - Anup Pramanik
- Department of Chemistry, Sidho-Kanho-Birsha University, Purulia723 104, India
| | - Pranab Sarkar
- Department of Chemistry, Visva-Bharati University, Santiniketan731 235, India
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8
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A comprehensive study of the reduction of nitrate on natural FeTiO3: Photocatalysis and DFT calculations. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.122570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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9
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Zhao C, Zhu A, Gao S, Wang L, Wan X, Wang A, Wang WH, Xue T, Yang S, Sun D, Wang W. Phonon Resonance Catalysis in NO Oxidation on Mn-Based Mullite. ACS Catal 2022. [DOI: 10.1021/acscatal.2c04018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Chunning Zhao
- Shenzhen Research Institute, Renewable Energy Conversion and Storage Center, College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300350, P. R. China
| | - Ao Zhu
- Shenzhen Research Institute, Renewable Energy Conversion and Storage Center, College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300350, P. R. China
| | - Shan Gao
- Shenzhen Research Institute, Renewable Energy Conversion and Storage Center, College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300350, P. R. China
| | - Lijing Wang
- Shenzhen Research Institute, Renewable Energy Conversion and Storage Center, College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300350, P. R. China
| | - Xiang Wan
- Shenzhen Research Institute, Renewable Energy Conversion and Storage Center, College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300350, P. R. China
| | - Ansheng Wang
- Shenzhen Research Institute, Renewable Energy Conversion and Storage Center, College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300350, P. R. China
| | - Wei-Hua Wang
- Shenzhen Research Institute, Renewable Energy Conversion and Storage Center, College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300350, P. R. China
| | - Tao Xue
- Analysis and Measurement Center, Tianjin University, Tianjin 300072, P. R. China
| | - Shikuan Yang
- Institute for Composites Science Innovation, School of Materials Science and Engineering, Zhejiang University, Hangzhou, Zhejiang 310027, P. R. China
| | - Deyan Sun
- Department of Physics, East China Normal University, Shanghai 200062, P. R. China
| | - Weichao Wang
- Shenzhen Research Institute, Renewable Energy Conversion and Storage Center, College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300350, P. R. China
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10
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Pandit S, Grassian VH. Gas-Phase Nitrous Acid (HONO) Is Controlled by Surface Interactions of Adsorbed Nitrite (NO 2-) on Common Indoor Material Surfaces. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:12045-12054. [PMID: 36001734 PMCID: PMC9454260 DOI: 10.1021/acs.est.2c02042] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 08/11/2022] [Accepted: 08/11/2022] [Indexed: 06/15/2023]
Abstract
Nitrous acid (HONO) is a household pollutant exhibiting adverse health effects and a major source of indoor OH radicals under a variety of lighting conditions. The present study focuses on gas-phase HONO and condensed-phase nitrite and nitrate formation on indoor surface thin films following heterogeneous hydrolysis of NO2, in the presence and absence of light, and nitrate (NO3-) photochemistry. These thin films are composed of common building materials including zeolite, kaolinite, painted walls, and cement. Gas-phase HONO is measured using an incoherent broadband cavity-enhanced ultraviolet absorption spectrometer (IBBCEAS), whereby condensed-phase products, adsorbed nitrite and nitrate, are quantified using ion chromatography. All of the surface materials used in this study can store nitrogen oxides as nitrate, but only thin films of zeolite and cement can act as condensed-phase nitrite reservoirs. For both the photo-enhanced heterogeneous hydrolysis of NO2 and nitrate photochemistry, the amount of HONO produced depends on the material surface. For zeolite and cement, little HONO is produced, whereas HONO is the major product from kaolinite and painted wall surfaces. An important result of this study is that surface interactions of adsorbed nitrite are key to HONO formation, and the stronger the interaction of nitrite with the surface, the less gas-phase HONO produced.
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11
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Tanyeli I, Darmadi I, Sech M, Tiburski C, Fritzsche J, Andersson O, Langhammer C. Nanoplasmonic NO 2 Sensor with a Sub-10 Parts per Billion Limit of Detection in Urban Air. ACS Sens 2022; 7:1008-1018. [PMID: 35357817 PMCID: PMC9040054 DOI: 10.1021/acssensors.1c02463] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
![]()
Urban air pollution
is a critical health problem in cities all
around the world. Therefore, spatially highly resolved real-time monitoring
of airborne pollutants, in general, and of nitrogen dioxide, NO2, in particular, is of utmost importance. However, highly
accurate but fixed and bulky measurement stations or satellites are
used for this purpose to date. This defines a need for miniaturized
NO2 sensor solutions with detection limits in the low parts
per billion range to finally enable indicative air quality monitoring
at low cost that facilitates detection of highly local emission peaks
and enables the implementation of direct local actions like traffic
control, to immediately reduce local emissions. To address this challenge,
we present a nanoplasmonic NO2 sensor based on arrays of
Au nanoparticles coated with a thin layer of polycrystalline WO3, which displays a spectral redshift in the localized surface
plasmon resonance in response to NO2. Sensor performance
is characterized under (i) idealized laboratory conditions, (ii) conditions
simulating humid urban air, and (iii) an outdoor field test in a miniaturized
device benchmarked against a commercial NO2 sensor approved
according to European and American standards. The limit of detection
of the plasmonic solution is below 10 ppb in all conditions. The observed
plasmonic response is attributed to a combination of charge transfer
between the WO3 layer and the plasmonic Au nanoparticles,
WO3 layer volume expansion, and changes in WO3 permittivity. The obtained results highlight the viability of nanoplasmonic
gas sensors, in general, and their potential for practical application
in indicative urban air monitoring, in particular.
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Affiliation(s)
- Irem Tanyeli
- Department of Physics, Chalmers University of Technology, 412 96 Göteborg, Sweden
- Insplorion AB, Arvid Wallgrens Backe 20, 413 46 Göteborg, Sweden
| | - Iwan Darmadi
- Department of Physics, Chalmers University of Technology, 412 96 Göteborg, Sweden
| | - Martin Sech
- Insplorion AB, Arvid Wallgrens Backe 20, 413 46 Göteborg, Sweden
| | - Christopher Tiburski
- Department of Physics, Chalmers University of Technology, 412 96 Göteborg, Sweden
| | - Joachim Fritzsche
- Department of Physics, Chalmers University of Technology, 412 96 Göteborg, Sweden
| | - Olof Andersson
- Insplorion AB, Arvid Wallgrens Backe 20, 413 46 Göteborg, Sweden
| | - Christoph Langhammer
- Department of Physics, Chalmers University of Technology, 412 96 Göteborg, Sweden
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12
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Yang Q, Li Q, Wang X, Wang X, Li L, Chu X, Wang D, Men J, Li X, Si W, Peng Y, Ma Y, Li J. Synergistic Effects of a CeO 2/SmMn 2O 5-H Diesel Oxidation Catalyst Induced by Acid-Selective Dissolution Drive the Catalytic Oxidation Reaction. ACS APPLIED MATERIALS & INTERFACES 2022; 14:2860-2870. [PMID: 34995451 DOI: 10.1021/acsami.1c20965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
A diesel oxidation catalyst (DOC) is installed upstream of an exhaust after-treatment line to remove CO and hydrocarbons and generate NO2. The catalyst should possess both good oxidation ability and thermal stability because it sits after the engine. We present a novel high-performance DOC with high steam resistance and thermal stability. A selective dissolution method is adopted to modify the surface physicochemical environment of CeO2-SmMn2O5. The X-ray photoelectron spectroscopy, X-ray absorption spectroscopy, Raman, electron paramagnetic resonance, hydrogen temperature-programmed reduction, and temperature-programmed desorption results reveal that surface Sm cations are partially removed with the exposure of more Mn4+ and Ce3+ cations and the presence of active surface oxygen species. This mechanism benefits the oxygen transformation from Ce to Mn and promotes the Ce3+ + Mn4+ ↔ Ce4+ + Mn3+ redox cycle according to the in situ near-ambient pressure X-ray photoelectron spectroscopy and in situ diffuse reflectance infrared Fourier transformation spectroscopy results. Under laboratory-simulated diesel combustion conditions, the catalyst demonstrates excellent low-temperature oxidation catalytic activity (CO and C3H6 conversion: T100 = 250 °C) compared to a Pt-based catalyst (CO and C3H6 conversion: T100 = 310 °C) with a WHSV of 120,000 mL g-1 h-1. Specifically, NO conversion reaches 68% when the temperature is approximately 300 °C.
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Affiliation(s)
- Qilei Yang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, P. R. China
| | - Qi Li
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, P. R. China
| | - Xiyang Wang
- Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
| | - Xiao Wang
- Department of Chemical Engineering, McGill University, Montreal, Quebec H3A 0C5, Canada
| | - Lei Li
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, P. R. China
| | - Xuefeng Chu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, P. R. China
| | - Dong Wang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, P. R. China
| | - Jishuai Men
- Air Pollution Control Laboratory, Shandong Daming Scinece and Technology Co., Ltd., Tengzhou, Shandong 277500, P. R. China
| | - Xinbo Li
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Wenzhe Si
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, P. R. China
| | - Yue Peng
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, P. R. China
| | - Yongliang Ma
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, P. R. China
| | - Junhua Li
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, P. R. China
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13
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Zhou M, Ou H, Li S, Qin X, Fang Y, Lee S, Wang X, Ho W. Photocatalytic Air Purification Using Functional Polymeric Carbon Nitrides. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2021; 8:e2102376. [PMID: 34693667 PMCID: PMC8693081 DOI: 10.1002/advs.202102376] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 08/20/2021] [Indexed: 05/19/2023]
Abstract
The techniques for the production of the environment have received attention because of the increasing air pollution, which results in a negative impact on the living environment of mankind. Over the decades, burgeoning interest in polymeric carbon nitride (PCN) based photocatalysts for heterogeneous catalysis of air pollutants has been witnessed, which is improved by harvesting visible light, layered/defective structures, functional groups, suitable/adjustable band positions, and existing Lewis basic sites. PCN-based photocatalytic air purification can reduce the negative impacts of the emission of air pollutants and convert the undesirable and harmful materials into value-added or nontoxic, or low-toxic chemicals. However, based on previous reports, the systematic summary and analysis of PCN-based photocatalysts in the catalytic elimination of air pollutants have not been reported. The research progress of functional PCN-based composite materials as photocatalysts for the removal of air pollutants is reviewed here. The working mechanisms of each enhancement modification are elucidated and discussed on structures (nanostructure, molecular structue, and composite) regarding their effects on light-absorption/utilization, reactant adsorption, intermediate/product desorption, charge kinetics, and reactive oxygen species production. Perspectives related to further challenges and directions as well as design strategies of PCN-based photocatalysts in the heterogeneous catalysis of air pollutants are also provided.
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Affiliation(s)
- Min Zhou
- Department of Science and Environmental StudiesThe Education University of Hong KongTai Po, New TerritoriesHong KongP. R. China
| | - Honghui Ou
- Department of ChemistryTsinghua UniversityBeijing100084P. R. China
| | - Shanrong Li
- State Key Laboratory of Photocatalysis on Energy and EnvironmentCollege of ChemistryFuzhou UniversityFuzhou350116P. R. China
| | - Xing Qin
- Department of Science and Environmental StudiesThe Education University of Hong KongTai Po, New TerritoriesHong KongP. R. China
| | - Yuanxing Fang
- State Key Laboratory of Photocatalysis on Energy and EnvironmentCollege of ChemistryFuzhou UniversityFuzhou350116P. R. China
| | - Shun‐cheng Lee
- Department of Civil and Environmental EngineeringThe Hong Kong Polytechnic UniversityHong KongP. R. China
| | - Xinchen Wang
- State Key Laboratory of Photocatalysis on Energy and EnvironmentCollege of ChemistryFuzhou UniversityFuzhou350116P. R. China
| | - Wingkei Ho
- Department of Science and Environmental StudiesThe Education University of Hong KongTai Po, New TerritoriesHong KongP. R. China
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14
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Yang Q, Wang X, Wang X, Li Q, Li L, Yang W, Chu X, Liu H, Men J, Peng Y, Ma Y, Li J. Surface Reconstruction of a Mullite-Type Catalyst via Selective Dissolution for NO Oxidation. ACS Catal 2021. [DOI: 10.1021/acscatal.1c03955] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Qilei Yang
- School of Environment, Tsinghua University, Beijing 100084, P. R. China
| | - Xiao Wang
- Department of Chemical Engineering, McGill University, Montreal, Quebec H3A 0C5, Canada
| | - Xiyang Wang
- Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
| | - Qi Li
- School of Environment, Tsinghua University, Beijing 100084, P. R. China
| | - Lei Li
- School of Environment, Tsinghua University, Beijing 100084, P. R. China
| | - Weinan Yang
- School of Environment, Tsinghua University, Beijing 100084, P. R. China
| | - Xuefeng Chu
- School of Environment, Tsinghua University, Beijing 100084, P. R. China
| | - Hao Liu
- School of Environment, Tsinghua University, Beijing 100084, P. R. China
| | - Jishuai Men
- Air Pollution Control Laboratory, Shandong Daming Science and Technology Co., Ltd., Shandong 277500, P. R. China
| | - Yue Peng
- School of Environment, Tsinghua University, Beijing 100084, P. R. China
| | - Yongliang Ma
- School of Environment, Tsinghua University, Beijing 100084, P. R. China
| | - Junhua Li
- School of Environment, Tsinghua University, Beijing 100084, P. R. China
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15
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Kim J, Choe YJ, Kim SH, Choi IS, Jeong K. Deciphering Evolution Pathway of Supported NO 3 • Enabled via Radical Transfer from •OH to Surface NO 3 - Functionality for Oxidative Degradation of Aqueous Contaminants. JACS AU 2021; 1:1158-1177. [PMID: 34467355 PMCID: PMC8397361 DOI: 10.1021/jacsau.1c00124] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Indexed: 06/13/2023]
Abstract
NO3 • can compete with omnipotent •OH/SO4 •- in decomposing aqueous pollutants because of its lengthy lifespan and significant tolerance to background scavengers present in H2O matrices, albeit with moderate oxidizing power. The generation of NO3 •, however, is of grand demand due to the need of NO2 •/O3, radioactive element, or NaNO3/HNO3 in the presence of highly energized electron/light. This study has pioneered a singular pathway used to radicalize surface NO3 - functionalities anchored on polymorphic α-/γ-MnO2 surfaces (α-/γ-MnO2-N), in which Lewis acidic Mn2+/3+ and NO3 - served to form •OH via H2O2 dissection and NO3 • via radical transfer from •OH to NO3 - (•OH → NO3 •), respectively. The elementary steps proposed for the •OH → NO3 • route could be energetically favorable and marginal except for two stages such as endothermic •OH desorption and exothermic •OH-mediated NO3 - radicalization, as verified by EPR spectroscopy experiments and DFT calculations. The Lewis acidic strength of the Mn2+/3+ species innate to α-MnO2-N was the smallest among those inherent to α-/β-/γ-MnO2 and α-/γ-MnO2-N. Hence, α-MnO2-N prompted the rate-determining stage of the •OH → NO3 • route (•OH desorption) in the most efficient manner, as also evidenced by the analysis on the energy barrier required to proceed with the •OH → NO3 • route. Meanwhile, XANES and in situ DRIFT spectroscopy experiments corroborated that α-MnO2-N provided a larger concentration of surface NO3 - species with bi-dentate binding arrays than γ-MnO2-N. Hence, α-MnO2-N could outperform γ-MnO2-N in improving the collision frequency between •OH and NO3 - species and in facilitating the exothermic transition of NO3 - functionalities to surface NO3 • analogues per unit time. These were corroborated by a greater efficiency of α-MnO2-N in decomposing phenol, in addition to scavenging/filtration control runs and DFT calculations. Importantly, supported NO3 • species provided 5-7-fold greater efficiency in degrading textile wastewater than conventional •OH and supported SO4 •- analogues we discovered previously.
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Affiliation(s)
- Jongsik Kim
- Extreme
Materials Research Center, Korea Institute
of Science and Technology, Seoul 02792, South
Korea
| | - Yun Jeong Choe
- Extreme
Materials Research Center, Korea Institute
of Science and Technology, Seoul 02792, South
Korea
- Department
of Materials Science and Engineering, Seoul
National University, Seoul 08826, South Korea
| | - Sang Hoon Kim
- Extreme
Materials Research Center, Korea Institute
of Science and Technology, Seoul 02792, South
Korea
- Division
of Nano and Information Technology, Korea Institute of Science and
Technology School, University of Science
and Technology, Daejeon 34113, South Korea
| | - In-Suk Choi
- Department
of Materials Science and Engineering, Seoul
National University, Seoul 08826, South Korea
| | - Keunhong Jeong
- Department
of Chemistry, Korea Military Academy, Seoul 01805, South Korea
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16
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17
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Pinakov DV, Makotchenko VG, Semushkina GI, Chekhova GN, Prosvirin IP, Asanov IP, Fedoseeva YV, Makarova AA, Shubin YV, Okotrub AV, Bulusheva LG. Redox reactions between acetonitrile and nitrogen dioxide in the interlayer space of fluorinated graphite matrices. Phys Chem Chem Phys 2021; 23:10580-10590. [PMID: 33903859 DOI: 10.1039/d0cp06412b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The interlayer space of 2D materials can be a slit reactor where transformations not typical for the gas phase occur. We report redox reactions involving acetonitrile and nitrogen oxide guests in galleries of fluorinated graphite. Fluorinated graphite intercalation compounds with acetonitrile are treated with dinitrogen tetraoxide and the synthesis products are studied by a set of experimental methods. Data analysis reveals that N2O4 dissociates in fluorinated graphite matrices to form nitrogen-containing species NO3, NO2, NO, and N2. The interaction of NO3 with acetonitrile yields HNO3, which predominates as a guest in the synthesis products independently of the fluorination degree of the matrix. This reaction is accompanied by the removal of fluorine atoms weakly bonded to the graphite layers, leading to partial defluorination of the matrices. Our work demonstrates the possibility of using fluorinated graphite as a test nanoreactor whose dimension can be controlled by fluorination of the layers.
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Affiliation(s)
- D V Pinakov
- Nikolaev Institute of Inorganic Chemistry SB RAS, 3 Acad. Lavrentiev Ave., 630090 Novosibirsk, Russia.
| | - V G Makotchenko
- Nikolaev Institute of Inorganic Chemistry SB RAS, 3 Acad. Lavrentiev Ave., 630090 Novosibirsk, Russia.
| | - G I Semushkina
- Nikolaev Institute of Inorganic Chemistry SB RAS, 3 Acad. Lavrentiev Ave., 630090 Novosibirsk, Russia.
| | - G N Chekhova
- Nikolaev Institute of Inorganic Chemistry SB RAS, 3 Acad. Lavrentiev Ave., 630090 Novosibirsk, Russia.
| | - I P Prosvirin
- Boreskov Institute of Catalysis SB RAS, 5 Acad. Lavrentiev Ave., 630090 Novosibirsk, Russia
| | - I P Asanov
- Nikolaev Institute of Inorganic Chemistry SB RAS, 3 Acad. Lavrentiev Ave., 630090 Novosibirsk, Russia.
| | - Yu V Fedoseeva
- Nikolaev Institute of Inorganic Chemistry SB RAS, 3 Acad. Lavrentiev Ave., 630090 Novosibirsk, Russia.
| | - A A Makarova
- Physikalische Chemie, Institut für Chemie und Biochemie, Freie Universität Berlin, 14195 Berlin, Germany
| | - Yu V Shubin
- Nikolaev Institute of Inorganic Chemistry SB RAS, 3 Acad. Lavrentiev Ave., 630090 Novosibirsk, Russia.
| | - A V Okotrub
- Nikolaev Institute of Inorganic Chemistry SB RAS, 3 Acad. Lavrentiev Ave., 630090 Novosibirsk, Russia.
| | - L G Bulusheva
- Nikolaev Institute of Inorganic Chemistry SB RAS, 3 Acad. Lavrentiev Ave., 630090 Novosibirsk, Russia.
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18
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Zhu P, Yin X, Gao X, Dong G, Xu J, Wang C. Enhanced photocatalytic NO removal and toxic NO2 production inhibition over ZIF-8-derived ZnO nanoparticles with controllable amount of oxygen vacancies. CHINESE JOURNAL OF CATALYSIS 2021. [DOI: 10.1016/s1872-2067(20)63592-6] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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19
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Lee ZR, Flores LA, Copeland WB, Murphy JG, Dixon DA. Reaction of NO 2 with Groups IV and VI Transition Metal Oxide Clusters. J Phys Chem A 2020; 124:9222-9236. [PMID: 33086016 DOI: 10.1021/acs.jpca.0c06760] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The addition of NO2 to Group IV (MO2)n and Group VI (MO3)n (n = 1-3) nanoclusters was studied using both density functional theory (DFT) and coupled cluster theory (CCSD(T)). The structures and overall binding energetics were predicted for Lewis acid-base addition without transfer of spin (a physisorption-type process) and the formation of either cluster-ONO (HONO-like or bidentate bonding) or NO3- formation where for both the spin is transferred to the metal oxide clusters (a chemisorption-type process). Only chemisorption of NO2 is predicted to be thermodynamically allowed at temperatures ≥298 K for Group IV (MO2)n clusters with the formation of surface chemisorbed NO2 being by far the most energetically favorable. The ligand binding energies (LBEs) for physisorption and chemisorption on the TiO2 nanoclusters are consistent with computational studies of the bulk solids. Chemisorption is only predicted to occur for (CrO3)n clusters in the form of a terminal nitrate containing species whereas the larger chemisorbed nitrate structures for (MoO3)n and (WO3)n were found to be metastable and unlikely to form in any appreciable amount at temperatures of 298 K and higher. NO2 is predicted to only be capable of physisorbing to (MoO3)n and (WO3)n at lower temperatures and therefore unlikely to bind NO2 at temperatures ≥298 K. Correlations between the (MO3)nNO2 ligand bond energies and the chemical properties of the parent (MO3)n clusters (Lewis acidity, ionization potentials, excitation energies, and M = O/M-O bond strengths) are described.
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Affiliation(s)
- Zachary R Lee
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - Luis A Flores
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - William B Copeland
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - Julia G Murphy
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - David A Dixon
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
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20
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Romanias MN, Ren Y, Grosselin B, Daële V, Mellouki A, Dagsson-Waldhauserova P, Thevenet F. Reactive uptake of NO 2 on volcanic particles: A possible source of HONO in the atmosphere. J Environ Sci (China) 2020; 95:155-164. [PMID: 32653175 DOI: 10.1016/j.jes.2020.03.042] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2019] [Revised: 11/28/2019] [Accepted: 03/17/2020] [Indexed: 06/11/2023]
Abstract
The heterogeneous degradation of nitrogen dioxide (NO2) on five samples of natural Icelandic volcanic particles has been investigated. Laboratory experiments were carried out under simulated atmospheric conditions using a coated wall flow tube (CWFT). The CWFT reactor was coupled to a blue light nitrogen oxides analyzer (NOx analyzer), and a long path absorption photometer (LOPAP) to monitor in real time the concentrations of NO2, NO and HONO, respectively. Under dark and ambient relative humidity conditions, the steady state uptake coefficients of NO2 varied significantly between the volcanic samples probably due to differences in magma composition and morphological variation related with the density of surface OH groups. The irradiation of the surface with simulated sunlight enhanced the uptake coefficients by a factor of three indicating that photo-induced processes on the surface of the dust occur. Furthermore, the product yields of NO and HONO were determined under both dark and simulated sunlight conditions. The relative humidity was found to influence the distribution of gaseous products, promoting the formation of gaseous HONO. A detailed reaction mechanism is proposed that supports our experimental observations. Regarding the atmospheric implications, our results suggest that the NO2 degradation on volcanic particles and the corresponding formation of HONO is expected to be significant during volcanic dust storms or after a volcanic eruption.
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Affiliation(s)
| | | | | | | | | | - Pavla Dagsson-Waldhauserova
- Agricultural University of Iceland, Keldnaholt, Reykjavik 112, Iceland; Faculty of Environmental Sciences, Czech University of Life Sciences, Prague 165 21, Czech Republic
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21
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Wu L, Fu C, Huang W. Surface chemistry of TiO 2 connecting thermal catalysis and photocatalysis. Phys Chem Chem Phys 2020; 22:9875-9909. [PMID: 32363360 DOI: 10.1039/c9cp07001j] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Chemical reactions catalyzed under heterogeneous conditions have recently expanded rapidly from traditional thermal catalysis to photocatalysis due to the rising concerns about sustainable development of energy and the environment. Adsorption of reactants on catalyst surfaces, subsequent surface reactions, and desorption of products from catalyst surfaces occur in both thermal catalysis and photocatalysis. TiO2 catalysts are widely used in thermal catalytic and photocatalytic reactions. Herein we review recent progress in surface chemistry, thermal catalysis and photocatalysis of TiO2 model catalysts from single crystals to nanocrystals with the aim of examining if the surface chemistry of TiO2 can bridge the fundamental understanding between thermal catalysis and photocatalysis. Following a brief introduction, the structures of major facets exposed on TiO2 catalysts, including surface reconstructions and defects, as well as the electronic structure and charge properties, are firstly summarized; then the recent progress in adsorption, thermal chemistry and photochemistry of small molecules on TiO2 single crystals and nanocrystals is comprehensively reviewed, focusing on manifesting the structure-(photo)activity relations and the commonalities/differences between thermal catalysis and photocatalysis; and finally concluding remarks and perspectives are given.
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Affiliation(s)
- Longxia Wu
- Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes and Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, P. R. China.
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22
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Degaga GD, Trought M, Nemsak S, Crumlin EJ, Seel M, Pandey R, Perrine KA. Investigation of N 2 adsorption on Fe 3O 4(001) using ambient pressure X-ray photoelectron spectroscopy and density functional theory. J Chem Phys 2020; 152:054717. [PMID: 32035447 DOI: 10.1063/1.5138941] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Reactions on iron oxide surfaces are prevalent in various chemical processes from heterogeneous catalysts to minerals. Nitrogen (N2) is known to dissociate on iron surfaces, a precursor for ammonia production in the Haber-Bosch process, where the dissociation of N2 is the limiting step in the reaction under equilibrium conditions. However, little is known about N2 adsorption on other iron-based materials, such as iron oxide surfaces that are ubiquitous in soils, steel pipelines, and other industrial materials. An atomistic description is reported for the binding of N2 on the Fe3O4(001) surface using first principles calculations with ambient pressure X-ray photoelectron spectroscopy. Two primary adsorption sites are experimentally identified from N2 dissociation on Fe3O4(001). The electronic signatures associated with the valence band region unambiguously show how the electronic structure of magnetite transforms near ambient pressures due to the binding of atomic nitrogen to different surface sites. Overall, the experimental and theoretical results of our study bridge the gap between ultra-high vacuum studies and reaction conditions to provide insight into other nitrogen-based chemistry on iron oxide surfaces that impact the agriculture and energy industries.
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Affiliation(s)
- Gemechis D Degaga
- Department of Physics, Michigan Technological University, 1400 Townsend Drive, Houghton, Michigan 49931-1295, USA
| | - Mikhail Trought
- Department of Chemistry, Michigan Technological University, 1400 Townsend Drive, Houghton, Michigan 49931-1295, USA
| | - Slavomir Nemsak
- Advanced Light Source, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720-8229, USA
| | - Ethan J Crumlin
- Advanced Light Source, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720-8229, USA
| | - Max Seel
- Department of Physics, Michigan Technological University, 1400 Townsend Drive, Houghton, Michigan 49931-1295, USA
| | - Ravindra Pandey
- Department of Physics, Michigan Technological University, 1400 Townsend Drive, Houghton, Michigan 49931-1295, USA
| | - Kathryn A Perrine
- Department of Chemistry, Michigan Technological University, 1400 Townsend Drive, Houghton, Michigan 49931-1295, USA
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23
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Vandenbroucke SST, Levrau E, Minjauw MM, Van Daele M, Solano E, Vos R, Dendooven J, Detavernier C. Study of the surface species during thermal and plasma-enhanced atomic layer deposition of titanium oxide films using in situ IR-spectroscopy and in vacuo X-ray photoelectron spectroscopy. Phys Chem Chem Phys 2020; 22:9262-9271. [DOI: 10.1039/d0cp00395f] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
By the powerful combination of in situ FTIR and in vacuo XPS, the surface species during ALD of TDMAT with different reactants could be identified.
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Affiliation(s)
| | - Elisabeth Levrau
- Department of Solid State Sciences
- CoCooN group
- Ghent University
- 9000 Gent
- Belgium
| | - Matthias M. Minjauw
- Department of Solid State Sciences
- CoCooN group
- Ghent University
- 9000 Gent
- Belgium
| | - Michiel Van Daele
- Department of Solid State Sciences
- CoCooN group
- Ghent University
- 9000 Gent
- Belgium
| | - Eduardo Solano
- Department of Solid State Sciences
- CoCooN group
- Ghent University
- 9000 Gent
- Belgium
| | - Rita Vos
- Interuniversity Micro Electronics Center (IMEC)
- 3001 Heverlee
- Belgium
| | - Jolien Dendooven
- Department of Solid State Sciences
- CoCooN group
- Ghent University
- 9000 Gent
- Belgium
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24
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Liu K, He H, Yu Y, Yan Z, Yang W, Shan W. Quantitative study of the NH3-SCR pathway and the active site distribution over CeWO at low temperatures. J Catal 2019. [DOI: 10.1016/j.jcat.2018.11.030] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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25
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Schedlbauer T, Lott P, Casapu M, Störmer H, Deutschmann O, Grunwaldt JD. Impact of the Support on the Catalytic Performance, Inhibition Effects and SO2 Poisoning Resistance of Pt-Based Formaldehyde Oxidation Catalysts. Top Catal 2018. [DOI: 10.1007/s11244-018-1122-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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26
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Han KH, Zhang JS, Guo B. Caveats and technical challenges in performance evaluation of activated carbon (AC) and non-AC filtration for NO 2 abatement toward energy-efficient and healthy ventilation. JOURNAL OF HAZARDOUS MATERIALS 2018; 360:560-570. [PMID: 30145483 DOI: 10.1016/j.jhazmat.2018.08.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 08/01/2018] [Accepted: 08/03/2018] [Indexed: 06/08/2023]
Abstract
As the awareness of public health/safety becomes important and the desire to provide clean/safe indoor air in a sustainable way increases, air filtration technology has become essential at urban built facilities, which are challenged by significant outdoor air pollution due to dense population and heavy traffic. To provide comparable/objective data for designers and professionals of gas-phase filtration equipment in HVAC systems, it is important to understand the performance and characteristics of possible filter medium candidates within a reasonable testing period at low levels of target hazard concentration (typically, ∼0.05 ppm). The present study investigated the 2000-time scale-down evaluation evidence and its behind reasons between practical high-concentration tests (∼100 ppm NO2) and actual low-concentration ones, and investigated potential dangers identified during the study in utilizing activated carbon (AC)-based virgin filter media in indoor applications due to unexpected NO-desorption phenomenon. Six filter media of AC-based and non-AC with different type/pellet/shape/size/target compound were selected and tested for abating NO2 mainly originated outdoors. A multi-channel simultaneous testing system was utilized for similar standard testing conditions. The study findings provide previously unavailable experimental data and new insight into the behavior of widely used filtration media against NO2 for the enhancement of urban resilience.
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Affiliation(s)
- K H Han
- Building Energy and Environmental Systems Laboratory (BEESL), Department of Mechanical and Aerospace Engineering, Syracuse University, Syracuse, NY 13244, USA(1).
| | - Jensen S Zhang
- Building Energy and Environmental Systems Laboratory (BEESL), Department of Mechanical and Aerospace Engineering, Syracuse University, Syracuse, NY 13244, USA(1)
| | - Bing Guo
- Building Energy and Environmental Systems Laboratory (BEESL), Department of Mechanical and Aerospace Engineering, Syracuse University, Syracuse, NY 13244, USA(1)
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27
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Jeong H, Seebauer EG, Ertekin E. First-principles description of oxygen self-diffusion in rutile TiO 2: assessment of uncertainties due to enthalpy and entropy contributions. Phys Chem Chem Phys 2018; 20:17448-17457. [PMID: 29911702 DOI: 10.1039/c8cp02741b] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Properties related to transport such as self-diffusion coefficients are relevant to fuel cells, electrolysis cells, and chemical/gas sensors. Prediction of self-diffusion coefficients from first-principles involves precise determination of both enthalpy and entropy contributions for point defect formation and migration. We use first-principles density functional theory to estimate the self-diffusion coefficient for neutral O0i and doubly ionized Oi2- interstitial oxygen in rutile TiO2 and compare the results to prior isotope diffusion experiments. In addition to formation and migration energy, detailed estimates of formation and migration entropy incorporating both vibrational and ionization components are included. Distinct migration pathways, both based on an interstitialcy mechanism, are identified for O0i and Oi2-. These result in self-diffusion coefficients that differ by several orders of magnitude, sufficient to resolve the charge state of the diffusing species to be Oi2- in experiment. The main sources of error when comparing computed parameters to those obtained from experiment are considered, demonstrating that uncertainties due to computed defect formation and migration entropies are comparable in magnitude to those due to computed defect formation and migration energies. Even so, the composite uncertainty seems to limit the accuracy of first-principles calculations to within a factor of ±103, demonstrating that direct connections between computation and experiment are now increasingly possible.
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Affiliation(s)
- Heonjae Jeong
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA.
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28
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Erme K, Raud J, Jõgi I. Adsorption of Nitrogen Oxides on TiO 2 Surface as a Function of NO 2 and N 2O 5 Fraction in the Gas Phase. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:6338-6345. [PMID: 29762035 DOI: 10.1021/acs.langmuir.7b03864] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The present study was devoted to the investigation of adsorption of nitrogen oxides on TiO2, with the focus on the effect of NO x concentration, composition, and flow rate. The inlet NO with a concentration of 200-800 ppm in pure N2 was mixed with ozone, produced from pure oxygen, and directed to a reactor with catalytic TiO2 powder. The oxidation of NO by ozone allowed to prepare mixtures with variable concentrations of NO and NO2 or NO2 and N2O5 which were adsorbed on the catalyst surface during the oxidation phase and were desorbed when only NO was flowing through the reactor. Diffuse reflectance infrared Fourier transform spectroscopy studies showed NO3- as the main adsorbed nitrogen oxide specimen on the surface. The amount of adsorbed nitrogen oxide species increased with the increasing fraction of NO2 in the gas phase and was inversely proportional with the gas-phase NO concentration. An important finding was the abrupt increase in the nitrogen oxide adsorption capacity of TiO2 when the inlet concentration of ozone became sufficiently large to oxidize NO x to N2O5. On the basis of the results, a model of the surface processes is proposed, involving the production of NO3 and N2O5 on the surface of TiO2.
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Affiliation(s)
- Kalev Erme
- Institute of Physics , University of Tartu , W. Ostwald Street 1 , 50411 Tartu , Estonia
| | - Jüri Raud
- Institute of Physics , University of Tartu , W. Ostwald Street 1 , 50411 Tartu , Estonia
| | - Indrek Jõgi
- Institute of Physics , University of Tartu , W. Ostwald Street 1 , 50411 Tartu , Estonia
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29
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Uzunova EL. Theoretical study of nitrogen dioxide and nitric oxide co-adsorption and DeNO x reaction on Cu-SAPO−34 and Cu-SSZ−13 in presence of Brønsted acid sites. MOLECULAR CATALYSIS 2018. [DOI: 10.1016/j.mcat.2018.01.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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30
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Shiraishi Y, Katayama M, Hashimoto M, Hirai T. Photocatalytic hydrogenation of azobenzene to hydrazobenzene on cadmium sulfide under visible light irradiation. Chem Commun (Camb) 2018; 54:452-455. [DOI: 10.1039/c7cc08428e] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Visible light irradiation of commercially-available CdS in alcohol successfully promotes selective azobenzene-to-hydrazobenzene reduction, where surface S vacancies play a crucial role for activity and selectivity.
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Affiliation(s)
- Yasuhiro Shiraishi
- Research Center for Solar Energy Chemistry, and Division of Chemical Engineering
- Graduate School of Engineering Science
- Osaka University
- Toyonaka 560-8531
- Japan
| | - Miyu Katayama
- Research Center for Solar Energy Chemistry, and Division of Chemical Engineering
- Graduate School of Engineering Science
- Osaka University
- Toyonaka 560-8531
- Japan
| | - Masaki Hashimoto
- Research Center for Solar Energy Chemistry, and Division of Chemical Engineering
- Graduate School of Engineering Science
- Osaka University
- Toyonaka 560-8531
- Japan
| | - Takayuki Hirai
- Research Center for Solar Energy Chemistry, and Division of Chemical Engineering
- Graduate School of Engineering Science
- Osaka University
- Toyonaka 560-8531
- Japan
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31
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Gilliard KL, Seebauer EG. Manipulation of native point defect behavior in rutile TiO 2 via surfaces and extended defects. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2017; 29:445002. [PMID: 28862156 DOI: 10.1088/1361-648x/aa89ba] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Semiconductor surfaces offer efficient pathways for exchanging native point defects with the underlying bulk. For rutile TiO2(1 1 0), isotopic self-diffusion studies of oxygen have suggested that the surface may act as a source for Oi while simultaneously acting as a sink for titanium interstitials Tii. Through self-diffusion measurements with labeled Ti as well as O, the present work develops a more complete picture of the diffusion-reaction network involving Oi and Tii, complete with the surface acting as a source for whichever elements are available from the gas phase and a sink for elements that are not. The picture points to the importance of extended defects such as platelets and crystallographic shear planes as reservoirs of Oi and Tii, acting as net sources or sinks of these species depending upon specific conditions. The results exemplify the combined roles of surfaces and extended defects in regulating point defect behavior even in macroscopic metal oxide crystals, and point to specific strategies for manipulating that behavior intentionally.
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Affiliation(s)
- Kandis Leslie Gilliard
- Department of Chemical and Biomolecular Engineering, University of Illinois, Urbana, IL 61801, United States of America
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32
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Hirakawa H, Hashimoto M, Shiraishi Y, Hirai T. Photocatalytic Conversion of Nitrogen to Ammonia with Water on Surface Oxygen Vacancies of Titanium Dioxide. J Am Chem Soc 2017; 139:10929-10936. [DOI: 10.1021/jacs.7b06634] [Citation(s) in RCA: 565] [Impact Index Per Article: 80.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Hiroaki Hirakawa
- Research
Center for Solar Energy Chemistry, and Division of Chemical Engineering,
Graduate School of Engineering Science, Osaka University, Toyonaka 560-8531, Japan
| | - Masaki Hashimoto
- Research
Center for Solar Energy Chemistry, and Division of Chemical Engineering,
Graduate School of Engineering Science, Osaka University, Toyonaka 560-8531, Japan
| | - Yasuhiro Shiraishi
- Research
Center for Solar Energy Chemistry, and Division of Chemical Engineering,
Graduate School of Engineering Science, Osaka University, Toyonaka 560-8531, Japan
- Precursory
Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), Saitama 332-0012, Japan
| | - Takayuki Hirai
- Research
Center for Solar Energy Chemistry, and Division of Chemical Engineering,
Graduate School of Engineering Science, Osaka University, Toyonaka 560-8531, Japan
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33
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Yang L, Hakki A, Wang F, Macphee DE. Different Roles of Water in Photocatalytic DeNOx Mechanisms on TiO 2: Basis for Engineering Nitrate Selectivity? ACS APPLIED MATERIALS & INTERFACES 2017; 9:17034-17041. [PMID: 28474882 DOI: 10.1021/acsami.7b01989] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The nitrate selectivity of TiO2 has important consequences for its efficiency as a NOx depollution photocatalyst. Most emphasis is typically given to photocatalyst activity, a measure of the rate at which NOx concentrations are reduced, but a reduction in NOx concentration (mainly NO + NO2) is not necessarily a reduction in atmospheric NO2 concentration because the catalytic process itself generates NO2. With NO2 being considerably more toxic than NO, more emphasis on nitrate selectivity, a measure of the NOx conversion to nitrate, and how to maximize it, should be given in engineering photocatalytic systems for improved urban air quality. This study, on the importance of adsorbed water in the photocatalytic oxidation of NOx, has identified important correlations which differentiate the role that water plays in the oxidation of NO and NO2. This observation is significant and offers insights into controlling nitrate selectivity on TiO2 and the potential for increased effectiveness in environmental photocatalyst applications.
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Affiliation(s)
- Lu Yang
- Department of Chemistry, University of Aberdeen , Meston Building, Meston Walk, AB24 3UE Aberdeen, Scotland, United Kingdom
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology , 122# Luoshi Road, Wuhan 430070, China
| | - Amer Hakki
- Department of Chemistry, University of Aberdeen , Meston Building, Meston Walk, AB24 3UE Aberdeen, Scotland, United Kingdom
| | - Fazhou Wang
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology , 122# Luoshi Road, Wuhan 430070, China
| | - Donald E Macphee
- Department of Chemistry, University of Aberdeen , Meston Building, Meston Walk, AB24 3UE Aberdeen, Scotland, United Kingdom
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34
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Pablos C, Marugán J, van Grieken R, Dunlop PSM, Hamilton JWJ, Dionysiou DD, Byrne JA. Electrochemical Enhancement of Photocatalytic Disinfection on Aligned TiO₂ and Nitrogen Doped TiO₂ Nanotubes. Molecules 2017; 22:molecules22050704. [PMID: 28452966 PMCID: PMC6154645 DOI: 10.3390/molecules22050704] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Revised: 04/24/2017] [Accepted: 04/26/2017] [Indexed: 11/16/2022] Open
Abstract
TiO₂ photocatalysis is considered as an alternative to conventional disinfection processes for the inactivation of waterborne microorganisms. The efficiency of photocatalysis is limited by charge carrier recombination rates. When the photocatalyst is immobilized on an electrically conducting support, one may assist charge separation by the application of an external electrical bias. The aim of this work was to study electrochemically assisted photocatalysis with nitrogen doped titania photoanodes under visible and UV-visible irradiation for the inactivation of Escherichia coli. Aligned TiO₂ nanotubes were synthesized (TiO₂-NT) by anodizing Ti foil. Nanoparticulate titania films were made on Ti foil by electrophoretic coating (P25 TiO₂). N-doped titania nanotubes and N,F co-doped titania films were also prepared with the aim of extending the active spectrum into the visible. Electrochemically assisted photocatalysis gave higher disinfection efficiency in comparison to photocatalysis (electrode at open circuit) for all materials tested. It is proposed that electrostatic attraction of negatively charged bacteria to the positively biased photoanodes leads to the enhancement observed. The N-doped TiO₂ nanotube electrode gave the most efficient electrochemically assisted photocatalytic inactivation of bacteria under UV-Vis irradiation but no inactivation of bacteria was observed under visible only irradiation. The visible light photocurrent was only a fraction (2%) of the UV response.
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Affiliation(s)
- Cristina Pablos
- Department of Chemical and Environmental Technology, ESCET, Universidad Rey Juan Carlos, c/Tulipán s/n, 28933 Móstoles, Madrid, Spain.
| | - Javier Marugán
- Department of Chemical and Environmental Technology, ESCET, Universidad Rey Juan Carlos, c/Tulipán s/n, 28933 Móstoles, Madrid, Spain.
| | - Rafael van Grieken
- Department of Chemical and Environmental Technology, ESCET, Universidad Rey Juan Carlos, c/Tulipán s/n, 28933 Móstoles, Madrid, Spain.
| | - Patrick Stuart Morris Dunlop
- Nanotechnology and Integrated BioEngineering Centre (NIBEC), Ulster University, Newtownabbey BT37 0QB, Northern Ireland, UK.
| | - Jeremy William John Hamilton
- Nanotechnology and Integrated BioEngineering Centre (NIBEC), Ulster University, Newtownabbey BT37 0QB, Northern Ireland, UK.
| | - Dionysios D Dionysiou
- Environmental Engineering and Science program, University of Cincinnati, 705 Engineering Research Center, Cincinnati, OH 45221, USA.
| | - John Anthony Byrne
- Nanotechnology and Integrated BioEngineering Centre (NIBEC), Ulster University, Newtownabbey BT37 0QB, Northern Ireland, UK.
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35
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Hirakawa H, Hashimoto M, Shiraishi Y, Hirai T. Selective Nitrate-to-Ammonia Transformation on Surface Defects of Titanium Dioxide Photocatalysts. ACS Catal 2017. [DOI: 10.1021/acscatal.7b00611] [Citation(s) in RCA: 91] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hiroaki Hirakawa
- Research
Center for Solar Energy Chemistry, and Division of Chemical Engineering,
Graduate School of Engineering Science, Osaka University, Toyonaka 560-8531, Japan
| | - Masaki Hashimoto
- Research
Center for Solar Energy Chemistry, and Division of Chemical Engineering,
Graduate School of Engineering Science, Osaka University, Toyonaka 560-8531, Japan
| | - Yasuhiro Shiraishi
- Research
Center for Solar Energy Chemistry, and Division of Chemical Engineering,
Graduate School of Engineering Science, Osaka University, Toyonaka 560-8531, Japan
- Precursory
Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), Saitama 332-0012, Japan
| | - Takayuki Hirai
- Research
Center for Solar Energy Chemistry, and Division of Chemical Engineering,
Graduate School of Engineering Science, Osaka University, Toyonaka 560-8531, Japan
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36
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Xu CQ, Lee MS, Wang YG, Cantu DC, Li J, Glezakou VA, Rousseau R. Structural Rearrangement of Au-Pd Nanoparticles under Reaction Conditions: An ab Initio Molecular Dynamics Study. ACS NANO 2017; 11:1649-1658. [PMID: 28121422 DOI: 10.1021/acsnano.6b07409] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The structure, composition, and atomic distribution of nanoalloys under operating conditions are of significant importance for their catalytic activity. In the present work, we use ab initio molecular dynamics simulations to understand the structural behavior of Au-Pd nanoalloys supported on rutile TiO2 under different conditions. We find that the Au-Pd structure is strongly dependent on the redox properties of the support, originating from strong metal-support interactions. Under reducing conditions, Pd atoms are inclined to move toward the metal/oxide interface, as indicated by a significant increase of Pd-Ti bonds. This could be attributed to the charge localization at the interface that leads to Coulomb attractions to positively charged Pd atoms. In contrast, under oxidizing conditions, Pd atoms would rather stay inside or on the exterior of the nanoparticle. Moreover, Pd atoms on the alloy surface can be stabilized by hydrogen adsorption, forming Pd-H bonds, which are stronger than Au-H bonds. Our work offers critical insights into the structure and redox properties of Au-Pd nanoalloy catalysts under working conditions.
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Affiliation(s)
- Cong-Qiao Xu
- Department of Chemistry, Tsinghua University , Beijing 100084, China
| | | | | | | | - Jun Li
- Department of Chemistry, Tsinghua University , Beijing 100084, China
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37
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Quesada-Cabrera R, Sotelo-Vázquez C, Quesada-González M, Melián EP, Chadwick N, Parkin IP. On the apparent visible-light and enhanced UV-light photocatalytic activity of nitrogen-doped TiO 2 thin films. J Photochem Photobiol A Chem 2017. [DOI: 10.1016/j.jphotochem.2016.10.013] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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38
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39
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Dong G, Yang L, Wang F, Zang L, Wang C. Removal of Nitric Oxide through Visible Light Photocatalysis by g-C3N4 Modified with Perylene Imides. ACS Catal 2016. [DOI: 10.1021/acscatal.6b01657] [Citation(s) in RCA: 173] [Impact Index Per Article: 21.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Guohui Dong
- Laboratory of Environmental Sciences and Technology, Xinjiang Technical Institute of Physics & Chemistry, Key Laboratory of Functional Materials and Devices for Special Environments, Chinese Academy of Sciences, Urumqi 830011, People’s Republic of China
| | - Liping Yang
- Laboratory of Environmental Sciences and Technology, Xinjiang Technical Institute of Physics & Chemistry, Key Laboratory of Functional Materials and Devices for Special Environments, Chinese Academy of Sciences, Urumqi 830011, People’s Republic of China
- The Graduate School of Chinese Academy of Science, Beijing 100049, People’s Republic of China
| | - Fu Wang
- Laboratory of Environmental Sciences and Technology, Xinjiang Technical Institute of Physics & Chemistry, Key Laboratory of Functional Materials and Devices for Special Environments, Chinese Academy of Sciences, Urumqi 830011, People’s Republic of China
| | - Ling Zang
- Nano
Institute of Utah and Department of Materials Science and Engineering, University of Utah, Salt Lake City, Utah 84112, United States
| | - Chuanyi Wang
- Laboratory of Environmental Sciences and Technology, Xinjiang Technical Institute of Physics & Chemistry, Key Laboratory of Functional Materials and Devices for Special Environments, Chinese Academy of Sciences, Urumqi 830011, People’s Republic of China
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40
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Fu Y, Zhang Y, Li G, Zhang J, Tian F. Non-pitch coal-based activated coke introduced CeOx and/or MnOx for low temperature selective catalytic reduction of NOx by NH3. RSC Adv 2016. [DOI: 10.1039/c5ra25865k] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
On the modified activated coke, the CeOx species, promoting NOx adsorption, significantly increased the starting denitrification activity and the Mn species, helping NH3 adsorption, showed a gradual increase in activity after a time delay.
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Affiliation(s)
- Yali Fu
- Key Laboratory of Coal Science and Technology
- Ministry of Education and Shanxi Province
- Taiyuan University of Technology
- Taiyuan 030024
- P. R. China
| | - Yongfa Zhang
- Key Laboratory of Coal Science and Technology
- Ministry of Education and Shanxi Province
- Taiyuan University of Technology
- Taiyuan 030024
- P. R. China
| | - Guoqiang Li
- Key Laboratory of Coal Science and Technology
- Ministry of Education and Shanxi Province
- Taiyuan University of Technology
- Taiyuan 030024
- P. R. China
| | - Jing Zhang
- Key Laboratory of Coal Science and Technology
- Ministry of Education and Shanxi Province
- Taiyuan University of Technology
- Taiyuan 030024
- P. R. China
| | - Fang Tian
- Department of Chemistry
- Taiyuan Normal University
- Taiyuan 030024
- P. R. China
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41
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Dinh CT, Hoogland S, Sargent EH. Spontaneous and Light-Driven Conversion of NOx on Oxide-Modified TiO2 Surfaces. Ind Eng Chem Res 2015. [DOI: 10.1021/acs.iecr.5b03710] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Cao-Thang Dinh
- Department of Electrical
and Computer Engineering, University of Toronto, 10 King’s
College, Toronto, Ontario M5S 3G4, Canada
| | - Sjoerd Hoogland
- Department of Electrical
and Computer Engineering, University of Toronto, 10 King’s
College, Toronto, Ontario M5S 3G4, Canada
| | - Edward H. Sargent
- Department of Electrical
and Computer Engineering, University of Toronto, 10 King’s
College, Toronto, Ontario M5S 3G4, Canada
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42
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Dzade NY, Roldan A, de Leeuw NH. The surface chemistry of NO(x) on mackinawite (FeS) surfaces: a DFT-D2 study. Phys Chem Chem Phys 2015; 16:15444-56. [PMID: 24947554 DOI: 10.1039/c4cp01138d] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
We present density functional theory calculations with a correction for the long-range interactions (DFT-D2) of the bulk and surfaces of mackinawite (FeS), and subsequent adsorption and dissociation of NO(x) gases (nitrogen monoxide (NO) and nitrogen dioxide (NO2)). Our results show that these environmentally important molecules interact very weakly with the energetically most stable (001) surface, but adsorb relatively strongly onto the FeS(011), (100) and (111) surfaces, preferentially at Fe sites via charge donation from these surface species. The NOx species exhibit a variety of adsorption geometries, with the most favourable for NO being the monodentate Fe-NO configuration, whereas NO2 is calculated to form a bidentate Fe-NOO-Fe configuration. From our calculated thermochemical energy and activation energy barriers for the direct dissociation of NO and NO2 on the FeS surfaces, we show that NO prefers molecular adsorption, while dissociative adsorption, i.e. NO2 (ads) → [NO(ads) + O(ads)] is preferred over molecular adsorption for NO2 onto the mackinawite surfaces. However, the calculated high activation barriers for the further dissociation of the second N-O bond to produce either [N(ads) and 2O(ads)] or [N(ads) and O2(ads)] suggest that complete dissociation of NO2 is unlikely to occur on the mackinawite surfaces.
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Affiliation(s)
- N Y Dzade
- Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, UK.
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43
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Yamamoto A, Teramura K, Hosokawa S, Tanaka T. Effects of SO 2 on selective catalytic reduction of NO with NH 3 over a TiO 2 photocatalyst. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2015; 16:024901. [PMID: 27877768 PMCID: PMC5036466 DOI: 10.1088/1468-6996/16/2/024901] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Revised: 01/07/2015] [Accepted: 01/29/2015] [Indexed: 06/05/2023]
Abstract
The effect of SO2 gas was investigated on the activity of the photo-assisted selective catalytic reduction of nitrogen monoxide (NO) with ammonia (NH3) over a TiO2 photocatalyst in the presence of excess oxygen (photo-SCR). The introduction of SO2 (300 ppm) greatly decreased the activity of the photo-SCR at 373 K. The increment of the reaction temperature enhanced the resistance to SO2 gas, and at 553 K the conversion of NO was stable for at least 300 min of the reaction. X-ray diffraction, FTIR spectroscopy, thermogravimetry and differential thermal analysis, x-ray photoelectron spectroscopy (XPS), elemental analysis and N2 adsorption measurement revealed that the ammonium sulfate species were generated after the reaction. There was a strong negative correlation between the deposition amount of the ammonium sulfate species and the specific surface area. Based on the above relationship, we concluded that the deposition of the ammonium sulfate species decreased the specific surface area by plugging the pore structure of the catalyst, and the decrease of the specific surface area resulted in the deactivation of the catalyst.
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Affiliation(s)
- Akira Yamamoto
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Kyotodaigaku Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
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44
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Hirakawa H, Katayama M, Shiraishi Y, Sakamoto H, Wang K, Ohtani B, Ichikawa S, Tanaka S, Hirai T. One-pot synthesis of imines from nitroaromatics and alcohols by tandem photocatalytic and catalytic reactions on Degussa (Evonik) P25 titanium dioxide. ACS APPLIED MATERIALS & INTERFACES 2015; 7:3797-3806. [PMID: 25621386 DOI: 10.1021/am508769x] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Photoirradiation (λ > 300 nm) of Degussa (Evonik) P25 TiO2, a mixture of anatase and rutile particles, in alcohols containing nitroaromatics at room temperature produces the corresponding imines with very high yields (80-96%). Other commercially available anatase or rutile TiO2 particles, however, exhibit very low yields (<30%). The imine formation involves two step reactions on the TiO2 surface: (i) photocatalytic oxidation of alcohols (aldehyde formation) and reduction of nitrobenzene (aniline formation) and (ii) condensation of the formed aldehyde and aniline on the Lewis acid sites (imine formation). The respective anatase and rutile particles were isolated from P25 TiO2 by the H2O2/NH3 and HF treatments to clarify the activity of these two step reactions. Photocatalysis experiments revealed that the active sites for photocatalytic reactions on P25 TiO2 are the rutile particles, promoting efficient reduction of nitrobenzene on the surface defects. In contrast, catalysis experiments showed that the anatase particles isolated from P25 TiO2 exhibit very high activity for condensation of aldehyde and aniline, because the number of Lewis acid sites on the particles (73 μmol g(-1)) is much higher than that of other commercially available anatase or rutile particles (<15 μmol g(-1)). The P25 TiO2 particles therefore successfully promote tandem photocatalytic and catalytic reactions on the respective rutile and anatase particles, thus producing imines with very high yields.
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Affiliation(s)
- Hiroaki Hirakawa
- Research Center for Solar Energy Chemistry, and Division of Chemical Engineering, Graduate School of Engineering Science, and §Institute for NanoScience Design, Osaka University , Toyonaka 560-8531, Japan
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45
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Ding W, Li W. A first principles study of the energetics and core level shifts of anion-doped TiO2 photocatalysts. CHINESE JOURNAL OF CATALYSIS 2015. [DOI: 10.1016/s1872-2067(14)60165-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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46
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Zhang X, Yu L, Tie J, Dong X. Gas sensitivity and sensing mechanism studies on Au-doped TiO₂ nanotube arrays for detecting SF₆ decomposed components. SENSORS 2014; 14:19517-32. [PMID: 25330053 PMCID: PMC4239856 DOI: 10.3390/s141019517] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/25/2014] [Revised: 09/29/2014] [Accepted: 10/08/2014] [Indexed: 11/16/2022]
Abstract
The analysis to SF6 decomposed component gases is an efficient diagnostic approach to detect the partial discharge in gas-insulated switchgear (GIS) for the purpose of accessing the operating state of power equipment. This paper applied the Au-doped TiO2 nanotube array sensor (Au-TiO2 NTAs) to detect SF6 decomposed components. The electrochemical constant potential method was adopted in the Au-TiO2 NTAs' fabrication, and a series of experiments were conducted to test the characteristic SF6 decomposed gases for a thorough investigation of sensing performances. The sensing characteristic curves of intrinsic and Au-doped TiO2 NTAs were compared to study the mechanism of the gas sensing response. The results indicated that the doped Au could change the TiO2 nanotube arrays' performances of gas sensing selectivity in SF6 decomposed components, as well as reducing the working temperature of TiO2 NTAs.
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Affiliation(s)
- Xiaoxing Zhang
- State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China.
| | - Lei Yu
- State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China.
| | - Jing Tie
- State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China.
| | - Xingchen Dong
- State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China.
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47
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Eltouny N, Ariya PA. Competing reactions of selected atmospheric gases on Fe3O4nanoparticles surfaces. Phys Chem Chem Phys 2014; 16:23056-66. [DOI: 10.1039/c4cp02379j] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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48
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Shiraishi Y, Hirakawa H, Togawa Y, Hirai T. Noble-Metal-Free Deoxygenation of Epoxides: Titanium Dioxide as a Photocatalytically Regenerable Electron-Transfer Catalyst. ACS Catal 2014. [DOI: 10.1021/cs500065x] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Yasuhiro Shiraishi
- Research Center for Solar
Energy Chemistry, and Division of Chemical Engineering, Graduate School
of Engineering Science, Osaka University, Toyonaka 560-8531, Japan
| | - Hiroaki Hirakawa
- Research Center for Solar
Energy Chemistry, and Division of Chemical Engineering, Graduate School
of Engineering Science, Osaka University, Toyonaka 560-8531, Japan
| | - Yoshiki Togawa
- Research Center for Solar
Energy Chemistry, and Division of Chemical Engineering, Graduate School
of Engineering Science, Osaka University, Toyonaka 560-8531, Japan
| | - Takayuki Hirai
- Research Center for Solar
Energy Chemistry, and Division of Chemical Engineering, Graduate School
of Engineering Science, Osaka University, Toyonaka 560-8531, Japan
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49
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A dopant-mediated recombination mechanism in Fe-doped TiO2 nanoparticles for the photocatalytic decomposition of nitric oxide. Catal Today 2014. [DOI: 10.1016/j.cattod.2013.09.026] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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50
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Liu H, Turner CH. Adsorption properties of nitrogen dioxide on hybrid carbon and boron-nitride nanotubes. Phys Chem Chem Phys 2014; 16:22853-60. [DOI: 10.1039/c4cp03555k] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Hybrid CNT–BNNT materials are predicted to have enhanced NO2 adsorption, which leads to large shifts in band gap, indicating potential sensing applications.
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Affiliation(s)
- Haining Liu
- Department of Chemical and Biological Engineering
- The University of Alabama
- Tuscaloosa, USA
| | - C. Heath Turner
- Department of Chemical and Biological Engineering
- The University of Alabama
- Tuscaloosa, USA
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