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Borgmeyer T, Zhou L, Breider F, Rossi MJ, Ludwig C. Natural and simulated weathering of polystyrene: A molecular view of the polymeric interface. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 947:174609. [PMID: 38997043 DOI: 10.1016/j.scitotenv.2024.174609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Revised: 06/23/2024] [Accepted: 07/06/2024] [Indexed: 07/14/2024]
Abstract
This work presents the changing abundance of surface functional groups (SFGs) on polystyrene (PS) upon weathering within one or a few molecular monolayers from a molecular point of view. PS particles were aged by exposing it to a gas flow of typically (5 %) O3 in O2 (PSO3), UV radiation using a solar simulator under controlled conditions in the laboratory (PSSS) and to the water/air interface immerged in a freshwater lake for 2 months (PSL). The chemical composition of the interface of weathered, compared to pristine (virgin or PSV) material was established using a titration technique that probed the chemical composition of the molecular interface of the polymer. The main conclusions of this exploratory study are: (a) The interface of PS changes significantly compared to ATR-FTIR spectra that do not show additional absorptions in the mid-IR spectrum over a penetration depth of more than hundred monolayers at 10 μm; (b) The average surface functionalization of the gas-solid interface, corresponding to the sum of all examined types of SFG, increases from 20 % of a monolayer for PSV to 40, 50 and 84 % for PSL, PSO3 and PSSS, respectively; (c) in all cases the most important SFG was surface -OH ranging from 11.2 to 64 % for PSV and PSSS, respectively; (d) each PS sample shows a characteristic SFG pattern or fingerprint using several probe gases; (e) O3 interaction led to interface acidification; (f) UV treatment leads to the highest degree of surface -OH functionalization compared to PSO3 and PSL. The accumulation of SFG's renders the interface more reactive towards adsorption of probe gases.
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Affiliation(s)
- T Borgmeyer
- École Polytechnique Fédérale de Lausanne (EPFL), ENAC IIE GR-LUD, Station 2, CH-1015 Lausanne, Switzerland.
| | - L Zhou
- École Polytechnique Fédérale de Lausanne (EPFL), ENAC IIE GR-CEL, Station 2, CH-1015 Lausanne, Switzerland; State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, People's Republic of China
| | - F Breider
- École Polytechnique Fédérale de Lausanne (EPFL), ENAC IIE GR-CEL, Station 2, CH-1015 Lausanne, Switzerland.
| | - M J Rossi
- École Polytechnique Fédérale de Lausanne (EPFL), ENAC IIE GR-LUD, Station 2, CH-1015 Lausanne, Switzerland.
| | - C Ludwig
- École Polytechnique Fédérale de Lausanne (EPFL), ENAC IIE GR-LUD, Station 2, CH-1015 Lausanne, Switzerland; Paul Scherrer Institute, PSI Center for Energy and Environmental Sciences, 5232 Villigen PSI, Switzerland.
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Pascaud M, Thevenet F, Duc C, Samuel C, Redon N, Romanias MN. Unraveling Ammonia and Trimethylamine Uptake on Conductive Doped Polyaniline. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:9180-9188. [PMID: 38642066 DOI: 10.1021/acs.langmuir.4c00565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/22/2024]
Abstract
Polyaniline (PAni)-based sensors are a promising solution for ammonia (NH3) detection at the ppb level. However, the nature of the NH3-PAni interaction and underlying drivers remain unclear. This paper proposes to characterize the interaction between doped PAni (dPAni) sensing material and NH3 by using a Knudsen cell. First, to characterize the dPAni interface, the probe-gas method, i.e., titration of surface sites with a gas of specific properties, is deployed. The dPAni interface is found to be homogeneous with more than 96% of surface sites of acid nature or with hydroxyl functional groups. This result highlights that basic gases such as amines might act as interfering gases for NH3 detection by polyaniline-based sensors. Second, the adsorption isotherms of NH3 and trimethylamine (TMA) on dPAni are reported at ambient temperature conditions, 293 K. The uptake of NH3 and TMA on dPAni follows a Langmuir-type behavior. This approach allows for the first time to quantify the uptake of NH3 and TMA on gas-sensor materials and determine typical Langmuir adsorption parameters, i.e., the partitioning coefficient, KLang, and the maximum surface coverage, Nmax. The corresponding values obtained for NH3 and TMA are Klang (NH3) = 19.7 × 10-15 cm3 molecules-1 Nmax (NH3) = 11.6 × 1014 molecules cm-2, KLang (TMA) = 7.0 × 10-15 cm3 molecules-1 Nmax (TMA) = 5.0 × 1014 molecules cm-2. KLang and Nmax values of NH3 are higher than those of TMA, suggesting that NH3 is more efficiently taken up than TMA on dPAni. The results of this work suggest that strong hydrogen bonding drives the performance of a polyaniline-based gas sensor for NH3 and amines. In conclusion, the Knudsen cell approach allows reconsidering the fundamentals of NH3 interactions with dPAni and provides new insights on drivers to enhance sensing properties.
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Affiliation(s)
- Marius Pascaud
- IMT Nord Europe, Institut Mines-Telecom, Université de Lille, Centre for Energy and Environment, Lille F-59000, France
- TERA Sensor, ZI Rousset, 1200 Avenue Olivier Perroy , Rousset F-13790, France
| | - Frederic Thevenet
- IMT Nord Europe, Institut Mines-Telecom, Université de Lille, Centre for Energy and Environment, Lille F-59000, France
| | - Caroline Duc
- IMT Nord Europe, Institut Mines-Telecom, Université de Lille, Centre for Energy and Environment, Lille F-59000, France
| | - Cedric Samuel
- IMT Nord Europe, Institut Mines-Telecom, Université de Lille, Centre for Materials and Processes, Lille F-59000, France
| | - Nathalie Redon
- IMT Nord Europe, Institut Mines-Telecom, Université de Lille, Centre for Energy and Environment, Lille F-59000, France
| | - Manolis N Romanias
- IMT Nord Europe, Institut Mines-Telecom, Université de Lille, Centre for Energy and Environment, Lille F-59000, France
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Yang M, Lenarda A, Frindy S, Sang Y, Oksanen V, Bolognani A, Hendrickx L, Helaja J, Li Y. A metal-free carbon catalyst for oxidative dehydrogenation of aryl cyclohexenes to produce biaryl compounds. Proc Natl Acad Sci U S A 2023; 120:e2303564120. [PMID: 37487083 PMCID: PMC10401020 DOI: 10.1073/pnas.2303564120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Accepted: 05/30/2023] [Indexed: 07/26/2023] Open
Abstract
A metal-free route based on a carbon catalyst to synthesize biphenyls through oxidative dehydrogenation (ODH) of phenyl cyclohexene has been investigated. Among the samples examined, an air-oxidized active carbon exhibits the best activity with a 9.1 × 10-2 h-1 rate constant, yielding 74% biphenyl in 28 h at 140 °C under five bar O2 in anisole. The apparent activation energy is measured as 54.5 kJ⋅mol-1. The extended reaction scope, consisting of 15 differently substituted phenyl cyclohexenes, shows the wide applicability of the proposed method. The catalyst's good recyclability over six runs suggests this ODH method as a promising route to access the biaryl compounds. In addition, the reaction mechanism is investigated with a combination of X-ray photoelectron spectroscopy, functional group blocking, and model compounds of carbon catalysts and is proposed to be based on the redox cycle of the quinoidic groups on the carbon surface. Additional experiments prove that the addition of the catalytic amount of acid (methanesulfonic acid) accelerates the reaction. In addition, Hammett plot examination suggests the formation of a carbonium intermediate, and its possible structure is outlined.
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Affiliation(s)
- Mingze Yang
- Department of Chemical and Metallurgical Engineering, School of Chemical Engineering, Aalto University, Espoo02150, Finland
| | - Anna Lenarda
- Department of Chemistry, University of Helsinki, Helsinki00014, Finland
| | - Sana Frindy
- Department of Chemistry, University of Helsinki, Helsinki00014, Finland
| | - Yushuai Sang
- Department of Chemical and Metallurgical Engineering, School of Chemical Engineering, Aalto University, Espoo02150, Finland
| | - Valtteri Oksanen
- Department of Chemistry, University of Helsinki, Helsinki00014, Finland
| | - Adriano Bolognani
- Department of Chemistry, University of Helsinki, Helsinki00014, Finland
| | - Lisa Hendrickx
- Department of Chemistry, University of Helsinki, Helsinki00014, Finland
| | - Juho Helaja
- Department of Chemistry, University of Helsinki, Helsinki00014, Finland
| | - Yongdan Li
- Department of Chemical and Metallurgical Engineering, School of Chemical Engineering, Aalto University, Espoo02150, Finland
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Mirghaffari N, Iannarelli R, Ludwig C, Rossi MJ. Coexistence of reactive functional groups at the interface of a powdered activated amorphous carbon: a molecular view. Mol Phys 2021. [DOI: 10.1080/00268976.2021.1966110] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
| | - Riccardo Iannarelli
- École Polytechnique Fédérale de Lausanne (EPFL), Safety Competence Center, EPFL RHO DSPS-SCC, Lausanne, Switzerland
| | - Christian Ludwig
- École Polytechnique Fédérale de Lausanne (EPFL), ENAC IIE GR-LUD, Lausanne, Switzerland
- Paul Scherrer Institute (PSI), ENE LBK CPM, Villigen, Switzerland
| | - Michel J. Rossi
- École Polytechnique Fédérale de Lausanne (EPFL), ENAC IIE GR-LUD, Lausanne, Switzerland
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5
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Perspectives on the Future of Ice Nucleation Research: Research Needs and Unanswered Questions Identified from Two International Workshops. ATMOSPHERE 2017. [DOI: 10.3390/atmos8080138] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Tapia A, Salgado MS, Martín MP, Rodríguez-Fernández J, Rossi MJ, Cabañas B. Chemical characterization of diesel and hydrotreated vegetable oil (HVO) soot after reactive gas probing using diffuse reflectance FTIR spectroscopy (DRIFTS). ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:7534-7543. [PMID: 28116624 DOI: 10.1007/s11356-017-8436-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Accepted: 01/09/2017] [Indexed: 06/06/2023]
Abstract
A chemical characterization of diesel and hydrotreated vegetable oil (HVO) soot has been developed using diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) before and after the reaction with different probe gases. Samples were generated under combustion conditions corresponding to an urban operation mode of a diesel engine and were reacted with probe gas-phase molecules in a Knudsen flow reactor. Specifically, NH2OH, O3 and NO2 were used as reactants (probes) and selected according to their reactivities towards specific functional groups on the sample surface. Samples of previously ground soot were diluted with KBr and were introduced in a DRIFTS accessory. A comparison between unreacted and reacted soot samples was made in order to establish chemical changes on the soot surface upon reaction. It was concluded that the interface of diesel and HVO soot before reaction mainly consists polycyclic aromatic hydrocarbons, nitro and carbonyl compounds, as well as ether functionalities. The main difference between both soot samples was observed in the band of the C=O groups that in diesel soot was observed at 1719 cm-1 but not in HVO soot. After reaction with probe gases, it was found that nitro compounds remain on the soot surface, that the degree of unsaturation decreases for reacted samples, and that new spectral bands such as hydroxyl groups are observed.
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Affiliation(s)
- A Tapia
- Departamento de Química Física, Facultad de Ciencias y Tecnologías Químicas, Universidad de Castilla La Mancha, Avda. Camilo José Cela s/n, 13071, Ciudad Real, Spain
| | - M S Salgado
- Departamento de Química Física, Facultad de Ciencias y Tecnologías Químicas, Universidad de Castilla La Mancha, Avda. Camilo José Cela s/n, 13071, Ciudad Real, Spain.
| | - M P Martín
- Departamento de Química Física, Facultad de Ciencias y Tecnologías Químicas, Universidad de Castilla La Mancha, Avda. Camilo José Cela s/n, 13071, Ciudad Real, Spain
| | - J Rodríguez-Fernández
- Grupo de Combustibles y Motores, Escuela Técnica Superior de Ingenieros Industriales, Universidad de Castilla La Mancha, Avda. Camilo José Cela 10, 13071, Ciudad Real, Spain
| | - M J Rossi
- Labor für Atmosphärenchemie (LAC), Paul Scherrer Institute (PSI), OBBA006, 5232, Villigen PSI, Switzerland
| | - B Cabañas
- Departamento de Química Física, Facultad de Ciencias y Tecnologías Químicas, Universidad de Castilla La Mancha, Avda. Camilo José Cela s/n, 13071, Ciudad Real, Spain
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7
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Dubes V, Parpaite T, Ducret T, Quignard JF, Mornet S, Reinhardt N, Baudrimont I, Dubois M, Freund-Michel V, Marthan R, Muller B, Savineau JP, Courtois A. Calcium signalling induced by in vitro exposure to silicium dioxide nanoparticles in rat pulmonary artery smooth muscle cells. Toxicology 2016; 375:37-47. [PMID: 27939335 DOI: 10.1016/j.tox.2016.12.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Revised: 12/06/2016] [Accepted: 12/06/2016] [Indexed: 11/18/2022]
Abstract
The development and use of nanomaterials, especially engineered nanoparticles (NP), is expected to provide many benefits. But at the same time the development of such materials is also feared because of their potential human health risks. Indeed, NP display some characteristics similar to ultrafine environmental particles which are known to exert deleterious cardiovascular effects including pro-hypertensive ones. In this context, the effect of NP on calcium signalling, whose deregulation is often involved in hypertensive diseases, remain poorly described. We thus assessed the effect of SiO2 NP on calcium signalling by fluorescence imaging and on the proliferation response in rat pulmonary artery smooth muscle cells (PASMC). In PASMC, acute exposure to SiO2 NP, from 1 to 500μg/mL, produced an increase of the [Ca2+]i. In addition, when PASMC were exposed to NP at 200μg/mL, a proliferative response was observed. This calcium increase was even greater in PASMC isolated from rats suffering from pulmonary hypertension. The absence of extracellular calcium, addition of diltiazem or nicardipine (L-type voltage-operated calcium channel inhibitors both used at 10μM), and addition of capsazepine or HC067047 (TRPV1 and TRPV4 inhibitors used at 10μM and 5μM, respectively) significantly reduced this response. Moreover, this response was also inhibited by thapsigargin (SERCA inhibitor, 1μM), ryanodine (100μM) and dantrolene (ryanodine receptor antagonists, 10μM) but not by xestospongin C (IP3 receptor antagonist, 10μM). Thus, NP induce an intracellular calcium rise in rat PASMC originating from both extracellular and intracellular calcium sources. This study also provides evidence for the implication of TRPV channels in NP induced calcium rise that may highlight the role of these channels in the deleterious cardiovascular effects of NP.
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Affiliation(s)
- Virginie Dubes
- Université de Bordeaux, 146, rue Léo Saignat, Bordeaux, F-33076, France; Inserm U1045, Centre de Recherche Cardio-Thoracique de Bordeaux, 146, rue Léo Saignat, Bordeaux, F-33076, France.
| | - Thibaud Parpaite
- Université de Bordeaux, 146, rue Léo Saignat, Bordeaux, F-33076, France; Inserm U1045, Centre de Recherche Cardio-Thoracique de Bordeaux, 146, rue Léo Saignat, Bordeaux, F-33076, France.
| | - Thomas Ducret
- Université de Bordeaux, 146, rue Léo Saignat, Bordeaux, F-33076, France; Inserm U1045, Centre de Recherche Cardio-Thoracique de Bordeaux, 146, rue Léo Saignat, Bordeaux, F-33076, France.
| | - Jean-François Quignard
- Université de Bordeaux, 146, rue Léo Saignat, Bordeaux, F-33076, France; Inserm U1045, Centre de Recherche Cardio-Thoracique de Bordeaux, 146, rue Léo Saignat, Bordeaux, F-33076, France.
| | - Stéphane Mornet
- Université de Bordeaux, 146, rue Léo Saignat, Bordeaux, F-33076, France; CNRS, ICMCB, UPR 9048, 87 Avenue du Dr Albert Schweitzer, 33600 Pessac, France.
| | - Nora Reinhardt
- Université de Bordeaux, 146, rue Léo Saignat, Bordeaux, F-33076, France; CNRS, ICMCB, UPR 9048, 87 Avenue du Dr Albert Schweitzer, 33600 Pessac, France.
| | - Isabelle Baudrimont
- Université de Bordeaux, 146, rue Léo Saignat, Bordeaux, F-33076, France; Inserm U1045, Centre de Recherche Cardio-Thoracique de Bordeaux, 146, rue Léo Saignat, Bordeaux, F-33076, France.
| | - Mathilde Dubois
- Université de Bordeaux, 146, rue Léo Saignat, Bordeaux, F-33076, France; Inserm U1045, Centre de Recherche Cardio-Thoracique de Bordeaux, 146, rue Léo Saignat, Bordeaux, F-33076, France.
| | - Véronique Freund-Michel
- Université de Bordeaux, 146, rue Léo Saignat, Bordeaux, F-33076, France; Inserm U1045, Centre de Recherche Cardio-Thoracique de Bordeaux, 146, rue Léo Saignat, Bordeaux, F-33076, France.
| | - Roger Marthan
- Université de Bordeaux, 146, rue Léo Saignat, Bordeaux, F-33076, France; Inserm U1045, Centre de Recherche Cardio-Thoracique de Bordeaux, 146, rue Léo Saignat, Bordeaux, F-33076, France; Centre Hospitalier Universitaire de Bordeaux, Hôpital du Haut-Lévêque, Service d'Exploration Fonctionnelle Respiratoire, Avenue de Magellan, Pessac, F-33076, France.
| | - Bernard Muller
- Université de Bordeaux, 146, rue Léo Saignat, Bordeaux, F-33076, France; Inserm U1045, Centre de Recherche Cardio-Thoracique de Bordeaux, 146, rue Léo Saignat, Bordeaux, F-33076, France.
| | - Jean-Pierre Savineau
- Université de Bordeaux, 146, rue Léo Saignat, Bordeaux, F-33076, France; Inserm U1045, Centre de Recherche Cardio-Thoracique de Bordeaux, 146, rue Léo Saignat, Bordeaux, F-33076, France.
| | - Arnaud Courtois
- Université de Bordeaux, 146, rue Léo Saignat, Bordeaux, F-33076, France; Inserm U1045, Centre de Recherche Cardio-Thoracique de Bordeaux, 146, rue Léo Saignat, Bordeaux, F-33076, France; Centre Hospitalier Universitaire de Bordeaux, Centre AntiPoison et de Toxicovigilance d'Aquitaine et de Poitou Charente, Place Amélie Raba Léon, Bordeaux, F-33076, France.
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Yuan S, Qin JS, Zou L, Chen YP, Wang X, Zhang Q, Zhou HC. Thermodynamically Guided Synthesis of Mixed-Linker Zr-MOFs with Enhanced Tunability. J Am Chem Soc 2016; 138:6636-42. [DOI: 10.1021/jacs.6b03263] [Citation(s) in RCA: 181] [Impact Index Per Article: 22.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Shuai Yuan
- Department of Chemistry, Texas A&M University, College Station, Texas 77843-3255, United States
| | - Jun-Sheng Qin
- Department of Chemistry, Texas A&M University, College Station, Texas 77843-3255, United States
| | - Lanfang Zou
- Department of Chemistry, Texas A&M University, College Station, Texas 77843-3255, United States
| | - Ying-Pin Chen
- Department of Chemistry, Texas A&M University, College Station, Texas 77843-3255, United States
- Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77842, United States
| | - Xuan Wang
- Department of Chemistry, Texas A&M University, College Station, Texas 77843-3255, United States
| | - Qiang Zhang
- Department of Chemistry, Texas A&M University, College Station, Texas 77843-3255, United States
| | - Hong-Cai Zhou
- Department of Chemistry, Texas A&M University, College Station, Texas 77843-3255, United States
- Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77842, United States
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9
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Tapia A, Salgado MS, Martín MP, Lapuerta M, Rodríguez-Fernández J, Rossi MJ, Cabañas B. Molecular Characterization of the Gas-Particle Interface of Soot Sampled from a Diesel Engine Using a Titration Method. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:2946-2955. [PMID: 26886850 DOI: 10.1021/acs.est.5b05531] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Surface functional groups of two different types of combustion aerosols, a conventional diesel (EN 590) and a hydrotreated vegetable oil (HVO) soot, have been investigated using heterogeneous chemistry (i.e., gas-particle surface reactions). A commercial sample of amorphous carbon (Printex XE2-B) was analyzed as a reference substrate. A Knudsen flow reactor was used to carry out the experiments under molecular flow conditions. The selected gases for the titration experiments were: N(CH3)3 for the identification of acidic sites, NH2OH for the presence of carbonyl groups, CF3COOH and HCl for basic sites of different strength, and O3 and NO2 for reducing groups. Reactivity with N(CH3)3 indicates a lower density of acidic functionalities for Printex XE2-B in relation to diesel and HVO soot. Results for NH2OH experiments indicates that commercial amorphous carbon exhibits a lower abundance of available carbonyl groups at the interface compared to the results from diesel and HVO soot, the latter being the one with the largest abundance of carbonyl functions. Reactions with acids indicate the presence of weak basic oxides on the particle surface that preferentially interact with the strong acid CF3COOH. Finally, reactions with O3 and NO2 reveal that diesel and especially HVO have a significantly higher reactivity with both oxidizers compared to that of Printex XE2-B because they have more reducing sites by roughly a factor of 10 and 30, respectively. The kinetics of titration reactions have also been investigated.
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Affiliation(s)
- A Tapia
- Departamento de Química Física, Facultad de Ciencias y Tecnologías Químicas, Universidad de Castilla La Mancha , Avda. Camilo José Cela s/n, 13071 Ciudad Real, Spain
| | - M S Salgado
- Departamento de Química Física, Facultad de Ciencias y Tecnologías Químicas, Universidad de Castilla La Mancha , Avda. Camilo José Cela s/n, 13071 Ciudad Real, Spain
| | - María Pilar Martín
- Departamento de Química Física, Facultad de Ciencias y Tecnologías Químicas, Universidad de Castilla La Mancha , Avda. Camilo José Cela s/n, 13071 Ciudad Real, Spain
| | - M Lapuerta
- Grupo de Combustibles y Motores, Escuela Técnica Superior de Ingenieros Industriales, Universidad de Castilla la Mancha , Avda. Camilo José Cela 10, 13071 Ciudad Real, Spain
| | - J Rodríguez-Fernández
- Grupo de Combustibles y Motores, Escuela Técnica Superior de Ingenieros Industriales, Universidad de Castilla la Mancha , Avda. Camilo José Cela 10, 13071 Ciudad Real, Spain
| | - M J Rossi
- Labor für Atmosphärenchemie (LAC), Paul Scherrer Institute (PSI) , OBBA006, CH-5232 Villigen PSI, Switzerland
| | - B Cabañas
- Departamento de Química Física, Facultad de Ciencias y Tecnologías Químicas, Universidad de Castilla La Mancha , Avda. Camilo José Cela s/n, 13071 Ciudad Real, Spain
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Sauvain JJ, Rossi MJ. Quantitative Aspects of the Interfacial Catalytic Oxidation of Dithiothreitol by Dissolved Oxygen in the Presence of Carbon Nanoparticles. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:996-1004. [PMID: 26683500 DOI: 10.1021/acs.est.5b04958] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
The catalytic nature of particulate matter is often advocated to explain its ability to generate reactive oxygen species, but quantitative data are lacking. We have performed molecular characterization of three different carbonaceous nanoparticles (NP) by 1. identifying and quantifying their surface functional groups based on probe gas-particle titration; 2. studying the kinetics of dissolved oxygen consumption in the presence of suspended NP's and dithiothreitol (DTT). We show that these NP's can reversibly change their oxidation state between oxidized and reduced functional groups present on the NP surface. By comparing the amount of O2 consumed and the number of strongly reducing sites on the NP, its average turnover ranged from 35 to 600 depending on the type of NP. The observed quadratic rate law for O2 disappearance points to a Langmuir-Hinshelwood surface-based reaction mechanism possibly involving semiquinone radical. In the proposed model, the strongly reducing surface site is assumed to be a polycyclic aromatic hydroquinone whose oxidation to the corresponding conjugated quinone is rate-limiting in the catalytic chain reaction. The presence and strength of the reducing surface functional groups are important for explaining the catalytic activity of NP in the presence of oxygen and a reducing agent like DTT.
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Affiliation(s)
- Jean-Jacques Sauvain
- Institute for Work and Health (IST), University of Lausanne and Geneva , Route de la Corniche 2, CH-1066 Epalinges-Lausanne, Switzerland
| | - Michel J Rossi
- Paul Scherrer Institute (PSI), Laboratory of Atmospheric Chemistry (LAC) , CH-5232 Villigen PSI, Switzerland
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11
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Qi W, Liu W, Guo X, Schlögl R, Su D. Oxidative Dehydrogenation on Nanocarbon: Intrinsic Catalytic Activity and Structure-Function Relationships. Angew Chem Int Ed Engl 2015; 54:13682-5. [DOI: 10.1002/anie.201505818] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Revised: 08/16/2015] [Indexed: 11/05/2022]
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12
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Oxidative Dehydrogenation on Nanocarbon: Intrinsic Catalytic Activity and Structure-Function Relationships. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201505818] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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13
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Dubey A, Goswami M, Yadav K, Chaudhary D. Oxidative Stress and Nano-Toxicity Induced by TiO2 and ZnO on WAG Cell Line. PLoS One 2015; 10:e0127493. [PMID: 26011447 PMCID: PMC4444277 DOI: 10.1371/journal.pone.0127493] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Accepted: 03/21/2015] [Indexed: 12/31/2022] Open
Abstract
Metallic nanoparticles are widely used in cosmetics, food products and textile industry. These particles are known to cause respiratory toxicity and epithelial inflammation. They are eventually released to aquatic environment necessitating toxicity studies in cells from respiratory organs of aquatic organisms. Hence, we have developed and characterized a new cell line, WAG, from gill tissue of Wallago attu for toxicity assessment of TiO2 and ZnO nanoparticles. The efficacy of the cell line as an in vitro system for nanoparticles toxicity studies was established using electron microscopy, cytotoxicity assays, genotoxicity assays and oxidative stress biomarkers. Results obtained with MTT assay, neutral red uptake assay and lactate dehydrogenase assay showed acute toxicity to WAG cells with IC50 values of 25.29 ± 0.12, 34.99 ± 0.09 and 35.06 ± 0.09 mg/l for TiO2 and 5.716 ± 0.1, 3.160 ± 0.1 and 5.57 ± 0.12 mg/l for ZnO treatment respectively. The physicochemical properties and size distribution of nanoparticles were characterized using electron microscopy with integrated energy dispersive X-ray spectroscopy and Zetasizer. Dose dependent increase in DNA damage, lipid peroxidation and protein carbonylation along with a significant decrease in activity of Superoxide Dismutase, Catalase, total Glutathione levels and total antioxidant capacity with increasing concentration of exposed nanoparticles indicated that the cells were under oxidative stress. The study established WAG cell line as an in vitro system to study toxicity mechanisms of nanoparticles on aquatic organisms.
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Affiliation(s)
- Akhilesh Dubey
- National Bureau of Fish Genetic Resources, Lucknow, Uttar Pradesh, India
| | - Mukunda Goswami
- National Bureau of Fish Genetic Resources, Lucknow, Uttar Pradesh, India
- * E-mail:
| | - Kamalendra Yadav
- National Agri-Food Biotechnology Institute, Mohali, Punjab, India
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Tapia A, Salgado MS, Martín MP, Sánchez-Valdepeñas J, Rossi MJ, Cabañas B. The use of heterogeneous chemistry for the characterization of functional groups at the gas/particle interface of soot from a diesel engine at a particular running condition. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2015; 22:4863-4872. [PMID: 24807246 DOI: 10.1007/s11356-014-2976-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2014] [Accepted: 04/23/2014] [Indexed: 06/03/2023]
Abstract
Two gases, O3 and NO2, were selected to probe the surface of a diesel fuel combustion aerosol sample, diesel soot, and amorphous carbon nanoparticles (PRINTEX XE2-B) using heterogeneous (i.e., gas-surface reactions). The gas uptake to saturation of the probes was measured under molecular flow conditions using a Knudsen flow reactor in order to quantify and characterize surface functional groups. Specifically, O3 and NO2 are used for the titration of oxidizable groups. Diesel soot samples interacted with the probe gases to various extents which points to the coexistence of different functional groups on the same aerosol surface such as reduced groups. The carbonaceous particles displayed significant differences: PRINTEX XE2-B amorphous carbon had a significantly lower surface functional group density of both total and strongly reducing groups despite its significantly larger internal surface area, compared to diesel soot. The uptake kinetics of the gas-phase probe molecules (uptake probabilities) were also measured in order to obtain further information on the reactivity of emitted soot aerosols in order to enable the potential prediction of health effects.
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Affiliation(s)
- A Tapia
- Departamento de Química Física Facultad de Ciencias Químicas, Universidad de Castilla La Mancha, Avda Camilo José Cela 10, 13071, Ciudad Real, Spain
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15
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Lyashchenko AK, Balakaeva IV, Loginova DV, Timofeeva LM. Microwave dielectric properties of aqueous trifluoroacetic acid solutions. RUSS J INORG CHEM+ 2014. [DOI: 10.1134/s003602361412016x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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16
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Qi W, Liu W, Zhang B, Gu X, Guo X, Su D. Oxidative Dehydrogenation on Nanocarbon: Identification and Quantification of Active Sites by Chemical Titration. Angew Chem Int Ed Engl 2013; 52:14224-8. [DOI: 10.1002/anie.201306825] [Citation(s) in RCA: 204] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2013] [Indexed: 11/10/2022]
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Qi W, Liu W, Zhang B, Gu X, Guo X, Su D. Oxidative Dehydrierung an Nanokohlenstoff: Identifizierung und Quantifizierung aktiver Zentren durch chemische Titration. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201306825] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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18
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Wei Y, Zhao Z, Yu X, Jin B, Liu J, Xu C, Duan A, Jiang G, Ma S. One-pot synthesis of core–shell Au@CeO2−δ nanoparticles supported on three-dimensionally ordered macroporous ZrO2 with enhanced catalytic activity and stability for soot combustion. Catal Sci Technol 2013. [DOI: 10.1039/c3cy00248a] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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19
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Larabi C, Quadrelli EA. Titration of Zr3(μ-OH) Hydroxy Groups at the Cornerstones of Bulk MOF UiO-67, [Zr6O4(OH)4(biphenyldicarboxylate)6], and Their Reaction with [AuMe(PMe3)]. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201200033] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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20
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McDonald JD, Campen MJ, Harrod KS, Seagrave J, Seilkop SK, Mauderly JL. Engine-operating load influences diesel exhaust composition and cardiopulmonary and immune responses. ENVIRONMENTAL HEALTH PERSPECTIVES 2011; 119:1136-41. [PMID: 21524982 PMCID: PMC3237353 DOI: 10.1289/ehp.1003101] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2010] [Accepted: 04/25/2011] [Indexed: 05/09/2023]
Abstract
BACKGROUND The composition of diesel engine exhaust (DEE) varies by engine type and condition, fuel, engine operation, and exhaust after treatment such as particle traps. DEE has been shown to increase inflammation, susceptibility to infection, and cardiovascular responses in experimentally exposed rodents and humans. Engines used in these studies have been operated at idle, at different steady-state loads, or on variable-load cycles, but exposures are often reported only as the mass concentration of particulate matter (PM), and the effects of different engine loads and the resulting differences in DEE composition are unknown. OBJECTIVES We assessed the impacts of load-related differences in DEE composition on models of inflammation, susceptibility to infection, and cardiovascular toxicity. METHODS We assessed inflammation and susceptibility to viral infection in C57BL/6 mice and cardiovascular toxicity in APOE-/- mice after being exposed to DEE generated from a single-cylinder diesel generator operated at partial or full load. RESULTS At the same PM mass concentration, partial load resulted in higher proportions of particle organic carbon content and a smaller particle size than did high load. Vapor-phase hydrocarbon content was greater at partial load. Compared with high-load DEE, partial-load DEE caused greater responses in heart rate and T-wave morphology, in terms of both magnitude and rapidity of onset of effects, consistent with previous findings that systemic effects may be driven largely by the gas phase of the exposure atmospheres. However, high-load DEE caused more lung inflammation and greater susceptibility to viral infection than did partial load. CONCLUSIONS Differences in engine load, as well as other operating variables, are important determinants of the type and magnitude of responses to inhaled DEE. PM mass concentration alone is not a sufficient basis for comparing or combining results from studies using DEE generated under different conditions.
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Affiliation(s)
- Jacob D McDonald
- Lovelace Respiratory Research Institute, Albuquerque, New Mexico 87108, USA.
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Sanfins E, Dairou J, Hussain S, Busi F, Chaffotte AF, Rodrigues-Lima F, Dupret JM. Carbon black nanoparticles impair acetylation of aromatic amine carcinogens through inactivation of arylamine N-acetyltransferase enzymes. ACS NANO 2011; 5:4504-11. [PMID: 21526848 DOI: 10.1021/nn103534d] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Carbon black nanoparticles (CB NPs) and their respirable aggregates/agglomerates are classified as possibly carcinogenic to humans. In certain industrial work settings, CB NPs coexist with aromatic amines (AA), which comprise a major class of human carcinogens. It is therefore crucial to characterize the interactions of CB NPs with AA-metabolizing enzymes. Here, we report molecular and cellular evidence that CB NPs interfere with the enzymatic acetylation of carcinogenic AA by rapidly binding to arylamine N-acetyltransferase (NAT), the major AA-metabolizing enzyme. Kinetic and biophysical analyses showed that this interaction leads to protein conformational changes and an irreversible loss of enzyme activity. In addition, our data showed that exposure to CB NPs altered the acetylation of 2-aminofluorene in intact lung Clara cells by impairing the endogenous NAT-dependent pathway. This process may represent an additional mechanism that contributes to the carcinogenicity of inhaled CB NPs. Our results add to recent data suggesting that major xenobiotic detoxification pathways may be altered by certain NPs and that this can result in potentially harmful pharmacological and toxicological effects.
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Affiliation(s)
- Elodie Sanfins
- Univ Paris Diderot, Sorbonne Paris Cité, Unité de Biologie Fonctionnelle et Adaptative, CNRS EAC4413, 75013, Paris, France
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Pujalté I, Passagne I, Brouillaud B, Tréguer M, Durand E, Ohayon-Courtès C, L'Azou B. Cytotoxicity and oxidative stress induced by different metallic nanoparticles on human kidney cells. Part Fibre Toxicol 2011; 8:10. [PMID: 21371295 PMCID: PMC3058043 DOI: 10.1186/1743-8977-8-10] [Citation(s) in RCA: 247] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2010] [Accepted: 03/03/2011] [Indexed: 01/10/2023] Open
Abstract
Background Some manufactured nanoparticles are metal-based and have a wide variety of applications in electronic, engineering and medicine. Until now, many studies have described the potential toxicity of NPs on pulmonary target, while little attention has been paid to kidney which is considered to be a secondary target organ. The objective of this study, on human renal culture cells, was to assess the toxicity profile of metallic nanoparticles (TiO2, ZnO and CdS) usable in industrial production. Comparative studies were conducted, to identify whether particle properties impact cytotoxicity by altering the intracellular oxidative status. Results Nanoparticles were first characterized by size, surface charge, dispersion and solubility. Cytotoxicity of NPs was then evaluated in IP15 (glomerular mesangial) and HK-2 (epithelial proximal) cell lines. ZnO and CdS NPs significantly increased the cell mortality, in a dose-dependent manner. Cytotoxic effects were correlated with the physicochemical properties of NPs tested and the cell type used. Analysis of reactive oxygen species and intracellular levels of reduced and oxidized glutathione revealed that particles induced stress according to their composition, size and solubility. Protein involved in oxidative stress such as NF-κb was activated with ZnO and CdS nanoparticles. Such effects were not observed with TiO2 nanoparticles. Conclusion On glomerular and tubular human renal cells, ZnO and CdS nanoparticles exerted cytotoxic effects that were correlated with metal composition, particle scale and metal solubility. ROS production and oxidative stress induction clearly indicated their nephrotoxic potential.
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Affiliation(s)
- Igor Pujalté
- Laboratoire Biologie Cellulaire, FRE/CNRS 3396, Université Bordeaux Segalen, 146 rue Léo-Saignat, Bordeaux Cedex, France
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Tabet L, Bussy C, Setyan A, Simon-Deckers A, Rossi MJ, Boczkowski J, Lanone S. Coating carbon nanotubes with a polystyrene-based polymer protects against pulmonary toxicity. Part Fibre Toxicol 2011; 8:3. [PMID: 21255417 PMCID: PMC3030506 DOI: 10.1186/1743-8977-8-3] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2010] [Accepted: 01/21/2011] [Indexed: 01/27/2023] Open
Abstract
BACKGROUND carbon nanotubes (CNT) can have adverse effects on health. Therefore, minimizing the risk associated with CNT exposure is of crucial importance. The aim of this work was to evaluate if coating multi-walled CNT (MWCNT) with polymers could modify their toxicity, thus representing a useful strategy to decrease adverse health effects of CNT. We used industrially-produced MWCNT uncoated (NT1) or coated (50/50 wt%) with acid-based (NT2) or polystyrene-based (NT3) polymer, and exposed murine macrophages (RAW 264.7 cell line) or Balb/c mice by intratracheal administration. Biological experiments were performed both in vitro and in vivo, examining time- and dose-dependent effects of CNT, in terms of cytotoxicity, expression of genes and proteins related to oxidative stress, inflammation and tissue remodeling, cell and lung tissue morphology (optical and transmission electron microscopy), and bronchoalveolar lavage fluid content analysis. RESULTS extensive physico-chemical characterization of MWCNT was performed, and showed, although similar dimensions for the 3 MWCNT, a much smaller specific surface area for NT2 and NT3 as compared to NT1 (54.1, 34 and 227.54 m(2)/g respectively), along with different surface characteristics. MWCNT-induced cytotoxicity, oxidative stress, and inflammation were increased by acid-based and decreased by polystyrene-based polymer coating both in vitro in murine macrophages and in vivo in lung of mice monitored for 6 months. CONCLUSIONS these results demonstrate that coating CNT with polymers, without affecting their intrinsic structure, may constitute a useful strategy for decreasing CNT toxicity, and may hold promise for improving occupational safety and that of general the user.
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Setyan A, Sauvain J, Guillemin M, Riediker M, Demirdjian B, Rossi MJ. Probing Functional Groups at the Gas–Aerosol Interface Using Heterogeneous Titration Reactions: A Tool for Predicting Aerosol Health Effects? Chemphyschem 2010; 11:3823-35. [DOI: 10.1002/cphc.201000490] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Ari Setyan
- Institut universitaire romand de Santé au Travail (IST), Université de Lausanne et Université de Genève, Rue du Bugnon 21, CH‐1011 Lausanne (Switzerland)
- Current address: Department of Environmental Toxicology, University of California, Davis, CA 95616 (USA)
| | - Jean‐Jacques Sauvain
- Institut universitaire romand de Santé au Travail (IST), Université de Lausanne et Université de Genève, Rue du Bugnon 21, CH‐1011 Lausanne (Switzerland)
| | - Michel Guillemin
- Institut universitaire romand de Santé au Travail (IST), Université de Lausanne et Université de Genève, Rue du Bugnon 21, CH‐1011 Lausanne (Switzerland)
| | - Michael Riediker
- Institut universitaire romand de Santé au Travail (IST), Université de Lausanne et Université de Genève, Rue du Bugnon 21, CH‐1011 Lausanne (Switzerland)
| | - Benjamin Demirdjian
- Centre Interdisciplinaire de Nanoscience de Marseille (CINaM), CNRS UPR 3118, Université de Marseille et Aix campus de Luminy, case 913, F‐13288 Marseille Cedex 9 (France)
| | - Michel J. Rossi
- Labor für Atmosphärenchemie (LAC), Paul Scherrer Institut (PSI), OFLA008, CH‐5232 Villigen PSI (Switzerland), Fax: (+41) 56 310 45 25
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Courtois A, Andujar P, Ladeiro Y, Ducret T, Rogerieux F, Lacroix G, Baudrimont I, Guibert C, Roux E, Canal-Raffin M, Brochard P, Marano F, Marthan R, Muller B. Effect of engineered nanoparticles on vasomotor responses in rat intrapulmonary artery. Toxicol Appl Pharmacol 2010; 245:203-10. [DOI: 10.1016/j.taap.2010.03.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2009] [Revised: 02/26/2010] [Accepted: 03/01/2010] [Indexed: 10/19/2022]
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Hussain S, Thomassen LCJ, Ferecatu I, Borot MC, Andreau K, Martens JA, Fleury J, Baeza-Squiban A, Marano F, Boland S. Carbon black and titanium dioxide nanoparticles elicit distinct apoptotic pathways in bronchial epithelial cells. Part Fibre Toxicol 2010; 7:10. [PMID: 20398356 PMCID: PMC2873464 DOI: 10.1186/1743-8977-7-10] [Citation(s) in RCA: 162] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2010] [Accepted: 04/16/2010] [Indexed: 12/13/2022] Open
Abstract
Background Increasing environmental and occupational exposures to nanoparticles (NPs) warrant deeper insight into the toxicological mechanisms induced by these materials. The present study was designed to characterize the cell death induced by carbon black (CB) and titanium dioxide (TiO2) NPs in bronchial epithelial cells (16HBE14o- cell line and primary cells) and to investigate the implicated molecular pathways. Results Detailed time course studies revealed that both CB (13 nm) and TiO2(15 nm) NP exposed cells exhibit typical morphological (decreased cell size, membrane blebbing, peripheral chromatin condensation, apoptotic body formation) and biochemical (caspase activation and DNA fragmentation) features of apoptotic cell death. A decrease in mitochondrial membrane potential, activation of Bax and release of cytochrome c from mitochondria were only observed in case of CB NPs whereas lipid peroxidation, lysosomal membrane destabilization and cathepsin B release were observed during the apoptotic process induced by TiO2 NPs. Furthermore, ROS production was observed after exposure to CB and TiO2 but hydrogen peroxide (H2O2) production was only involved in apoptosis induction by CB NPs. Conclusions Both CB and TiO2 NPs induce apoptotic cell death in bronchial epithelial cells. CB NPs induce apoptosis by a ROS dependent mitochondrial pathway whereas TiO2 NPs induce cell death through lysosomal membrane destabilization and lipid peroxidation. Although the final outcome is similar (apoptosis), the molecular pathways activated by NPs differ depending upon the chemical nature of the NPs.
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Affiliation(s)
- Salik Hussain
- Université Paris Diderot - Paris 7, Unit of Functional and Adaptive Biology (BFA) CNRS EAC 4413, Laboratory of Molecular and Cellular Responses to Xenobiotics, 75205 Paris, France
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