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Moissette A, Batonneau-Gener I, Hureau M, Pinard L, Vezin H, Perdicakis M, Walcarius A. Electron transfers in graphitized HZSM-5 zeolites. Phys Chem Chem Phys 2021; 23:1914-1922. [PMID: 33459301 DOI: 10.1039/d0cp06148d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In the present work, we report the electron transfers occurring after ionization of the guest molecules of t-stilbene incorporated in graphitized HZSM-5 zeolites and we compare these results with the data obtained previously for graphite-free zeolites. Complementary diffuse reflectance UV-vis and Raman scattering spectroscopies provide evidence for stabilization of long lived charge separated states as observed in non-graphitized ZSM-5. The spectral features indicate that these species are located in the channels of the zeolite structure. However, the pulsed EPR technique shows strong coupling between unpaired electrons and the 13C atoms in the case of graphitized zeolites while this interaction is not observed in normal zeolites. This is assigned to the presence of charge transfer complexes in the close vicinity of graphite areas and to the possible electron transfer to the graphitized domain. Using cyclic voltammetry, an electrochemical response is observed for the first time in such systems demonstrating the role played by graphite in the electron transfers.
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Affiliation(s)
- Alain Moissette
- LASIRE Bât. C5, Faculté des Sciences et Technologies, Université de Lille, 59655 Villeneuve d'Ascq Cedex, France.
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Duplouy L, Moissette A, Hureau M, De Waele V, Daou TJ, Batonneau-Gener I. Effect of zeolite morphology on charge separated states: ZSM-5-type nanocrystals, nanosheets and nanosponges. Phys Chem Chem Phys 2020; 22:12015-12027. [PMID: 32421132 DOI: 10.1039/d0cp01701a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
In the present work, we investigate the electron transfer occurring in the porous void of three MFI-type zeolite (ZSM-5) nanomaterials (nanocrystals, nanosheets and nanosponges) after adsorption and photoexcitation of t-stilbene (t-St). ZSM-5 nanosheets are constituted of lamellar stacking of several nanosheets (20-40 nm) where each nanosheet has a thickness of 2 nm. Nanosponges are composed of ZSM-5 nanocrystals (2-3 nm) separated by mesoporous holes of 5.8 nm facilitating the synthesis of hierachical materials. While the nanosheets show microporosity similar to that observed for the ZSM-5 nanocrystals, the absorption isotherms of the nanosponges show the existence of secondary micropores. After photoirradiation of t-St, UV-vis absorption spectroscopy shows the formation of charge separated states (radical cation and charge transfer complex) in the nanocrystals and in the nanosheets whereas no ionized species is detected in the nanosponges. The radical cation (RC) is stabilized in the nanosheets while it evolves very rapidly towards a Charge Transfer Complex (CTC) in the nanocrocrystals. The particular morphology of the nanosheets and nanosponges is put forward to explain this result since all host materials are of the MFI-type. To investigate ultra-short phenomena in the three nanomaterials, the UV-vis transient spectra were recorded between 2 and 450 μs after photoexcitation by nanosecond laser pulses. In the nanocrystals and nanosheets only the RC is detected whereas CTC formation is not observed. Photoexcitation of t-St in the nanosponges also leads to the formation of a RC but it recombines completely within 70 μs. This suggests the preferential location of t-St in the secondary micropores with pores larger than the micropores of the MFI-type framework and possibly in the mesopores of the nanosponges.
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Affiliation(s)
- Lucie Duplouy
- LASIRE, Bât. C5, Faculté des Sciences et Technologies, Université de Lille, 59655 Villeneuve d'Ascq Cedex, France.
| | - Alain Moissette
- LASIRE, Bât. C5, Faculté des Sciences et Technologies, Université de Lille, 59655 Villeneuve d'Ascq Cedex, France.
| | - Matthieu Hureau
- LASIRE, Bât. C5, Faculté des Sciences et Technologies, Université de Lille, 59655 Villeneuve d'Ascq Cedex, France.
| | - Vincent De Waele
- LASIRE, Bât. C5, Faculté des Sciences et Technologies, Université de Lille, 59655 Villeneuve d'Ascq Cedex, France.
| | - T Jean Daou
- Université de Haute Alsace (UHA), CNRS, IS2M (Institut de Science des Matériaux de Mulhouse), UMR 7361, F-68100 Mulhouse, France and Université de Strasbourg, France
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Adsorption Capacities of Hygroscopic Materials Based on NaCl-TiO 2 and NaCl-SiO 2 Core/Shell Particles. JOURNAL OF NANOTECHNOLOGY 2020. [DOI: 10.1155/2020/3683629] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Hygroscopic materials which possess high moisture adsorption capacity were successfully upgraded by the functionalization of sodium chloride (NaCl) using two nuances of oxides. A procedure was developed to first prepare submicron-sized NaCl crystals; thereafter, these crystals were coated by choice of either titanium dioxide (TiO2) or silica (SiO2) to enhance the hygroscopic properties of NaCl and prevent its premature deliquescence. After coating, several analytical techniques were employed to evaluate the obtained composite materials. Our findings revealed that both composites NaCl-TiO2 and NaCl-SiO2 gave excellent performances by exhibiting interesting hydrophilic properties, compared to the sole NaCl. This was demonstrated by both environmental scanning electron microscope (ESEM) and water vapor adsorption experiments. In particular, NaCl-TiO2 composite showed the highest water adsorption capacity at low relative humidity and at a faster adsorption rate, induced by the high surface energy owing to the presence of TiO2. This result was also confirmed by the kinetics of adsorption, which revealed that not only does NaCl-TiO2 adsorb more water vapor than NaCl-SiO2 or sole NaCl but also the adsorption occurred at a much higher rate. While at room temperature and high relative humidity, the NaCl-SiO2 composite showed the best adsorption properties making it ideal to be used as a hygroscopic material, showing maximum adsorption performance compared to NaCl-TiO2 or sole NaCl. Therefore, NaCl-TiO2 and NaCl-SiO2 composites could be considered as promising hygroscopic materials and potential candidates to replace the existing salt seeding agents.
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Huang X, Ren R, Singh NK, Hardi M, Chen J. Enhancing Cyclic Performance and Rate Capability of Li4Ti5O12for Lithium-Ion Batteries through Thin Carbon Coating. ChemistrySelect 2018. [DOI: 10.1002/slct.201802308] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Xingkang Huang
- Department of Mechanical Engineering; University of Wisconsin-Milwaukee; 3200 North Cramer Street Milwaukee, WI 53211 USA
| | - Ren Ren
- Department of Mechanical Engineering; University of Wisconsin-Milwaukee; 3200 North Cramer Street Milwaukee, WI 53211 USA
| | - Niraj K. Singh
- Sigma-Aldrich Co., LLC.; MilliporeSigma; 6000 North Teutonia Avenue Milwaukee, WI 53209 USA
| | - Meenakshi Hardi
- Sigma-Aldrich Co., LLC.; MilliporeSigma; 6000 North Teutonia Avenue Milwaukee, WI 53209 USA
| | - Junhong Chen
- Department of Mechanical Engineering; University of Wisconsin-Milwaukee; 3200 North Cramer Street Milwaukee, WI 53211 USA
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Li W, Li L, Cui G, Bai Y, Xiao X, Li Y, Yan L. HIPE Polymerization Materials Functionalized with Iodic-BODIPY on the Surface as Porous Heterogeneous Visible-Light Photocatalysts. Chem Asian J 2017; 12:392-396. [DOI: 10.1002/asia.201601628] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Revised: 12/25/2016] [Indexed: 01/05/2023]
Affiliation(s)
- Wenliang Li
- Jilin Medical University; Jilin Road. 5 Jilin 132013 China
- School of Life Science; Northeast Normal University; Jingyue Street. 2555 Changchun 130024 China
- Key Laboratory of Preparation and Application of Environmental Friendly Materials; Ministry of Education; Jilin Normal University; Zhuoyue Street. 399 Changchun 130103 China
| | - Leijiao Li
- State Key Laboratory of Rare earth Resource Utilization; Changchun Institute of Applied Chemistry; Renmin Street. 5625 Changchun 130022 China
| | - Guihua Cui
- Jilin Medical University; Jilin Road. 5 Jilin 132013 China
| | - Yu Bai
- Jilin Medical University; Jilin Road. 5 Jilin 132013 China
| | - Xiao Xiao
- Jilin Medical University; Jilin Road. 5 Jilin 132013 China
| | - Yuxin Li
- School of Life Science; Northeast Normal University; Jingyue Street. 2555 Changchun 130024 China
| | - Lesan Yan
- Department of Bioengineering; University of Pennsylvania; 210 S. 33rd Street Philadelphia PA 19104-6321 United States
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Gornati R, Longo A, Rossi F, Maisano M, Sabatino G, Mauceri A, Bernardini G, Fasulo S. Effects of titanium dioxide nanoparticle exposure in Mytilus galloprovincialis gills and digestive gland. Nanotoxicology 2016; 10:807-17. [PMID: 26846715 DOI: 10.3109/17435390.2015.1132348] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Despite the wide use of nanoscale materials in several fields, some aspects of the nanoparticle behavior have to be still investigated. In this work, we faced the aspect of environmental effects of increasing concentrations of TiO2NPs using the Mytilus galloprovincialis as an animal model and carrying out a multidisciplinary approach to better explain the results. Bioaccumulation suggested that the gills and digestive gland are the most sensitive organs to TiO2NP exposure. Histological observations have evidenced an altered tissue organization and a consistent infiltration of hemocytes, as a consequence of the immune system activation, even though an increase in lipid peroxidation is uncertain and DNA damage became relevant only at high exposure dose (10 mg/L) or for longer exposure time (96 h). However, the over expression of SOD1 mRNA strengthen the concept that the toxicity of TiO2NPs could occur indirectly by ROS production. TEM analysis showed the presence of multilamellar bodies, RER fragmentation, and cytoplasmic vacuolization within relevant presence of dense granules, residual bodies, and lipid inclusions. These findings support the evidence of an initial inflammatory response by the cells of the target organs leading to apoptosis. In conclusion, we can state that certainly the exposure to TiO2NPs has affected our animal model from cellular to molecular levels. Interestingly, the same responses are caused by lower TiO2NP concentration and longer exposure time as well as higher doses and shorter exposure. We do not know if some of the conditions detected are reversible, then further studies are required to clarify this aspect.
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Affiliation(s)
- Rosalba Gornati
- a Dipartimento di Biotecnologie e Scienze della Vita , Università dell'Insubria , Varese , Italy .,b "The Protein Factory" Research Center, Politecnico di Milano, ICRM-CNR Milano and Università dell'Insubria , Milano , Italy
| | - Arturo Longo
- c Dipartimento di Scienze Biologiche e Ambientali , and
| | - Federica Rossi
- a Dipartimento di Biotecnologie e Scienze della Vita , Università dell'Insubria , Varese , Italy
| | - Maria Maisano
- c Dipartimento di Scienze Biologiche e Ambientali , and
| | - Giuseppe Sabatino
- d Dipartimento di Fisica e Scienze della Terra , Università di Messina , Messina , Italy
| | | | - Giovanni Bernardini
- a Dipartimento di Biotecnologie e Scienze della Vita , Università dell'Insubria , Varese , Italy .,b "The Protein Factory" Research Center, Politecnico di Milano, ICRM-CNR Milano and Università dell'Insubria , Milano , Italy
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Gao Y, Tan KM, Li Y, Minn KT, Alsema AM, Xu C. Characterization of Titanium Dioxide Nanoparticles on Porcine Skin by Raman Microscopy. ANAL LETT 2015. [DOI: 10.1080/00032719.2015.1038558] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Abstract
Hybrid ZnO/TiO2nanoparticles were applied as potential photocatalyst agents incorporated into electrospun fibers of enteric block copolymers. The resistance of fibers avoids aggregation and contributes to prolonged action of semiconductor nanoparticles under continuous light irradiation. Such behavior is attributed to the minimal aggregation degree and elevated efficiency of photodegradation of modified nanoparticles in comparison with pristine ones. Hybrid ZnO/TiO2in nanofibers contributes to the association of different mechanisms such as N-deethylation and cleavage of dye molecules applied in the overall process of photodegradation.
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Li S, Chen Z, Li T, Gao H, Wei C, Li W, Kong W, Zhang W. Vertical nanosheet-structured ZnO/TiO2 photoelectrodes for highly efficient CdS quantum dot sensitized solar cells. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2014.02.042] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Li W, Zhang W, Dong X, Yan L, Qi R, Wang W, Xie Z, Jing X. Porous heterogeneous organic photocatalyst prepared by HIPE polymerization for oxidation of sulfides under visible light. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm32778c] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Marin ML, Santos-Juanes L, Arques A, Amat AM, Miranda MA. Organic photocatalysts for the oxidation of pollutants and model compounds. Chem Rev 2011; 112:1710-50. [PMID: 22040166 DOI: 10.1021/cr2000543] [Citation(s) in RCA: 220] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- M Luisa Marin
- Instituto Universitario Mixto de Tecnología Química-Departamento de Química (UPV-CSIC), Avda. de los Naranjos s/n, E-46022, Valencia, Spain
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Parvulescu VI, Garcia H. Photocatalysis in green chemistry and destruction of very toxic compounds. CATALYSIS 2011. [DOI: 10.1039/9781849732772-00204] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Vasile I. Parvulescu
- University of Bucharest Faculty of Chemistry, Department of Chemical Technology and Catalysis, Bd. Regina Elisabeta 4–12 030018 Bucharest Romania
| | - Hermenegildo Garcia
- Instituto de Tecnología Química CSIC-UPV Universidad Politécnica de Valencia, Av. De los Naranjos s/n 46022 Valencia Spain
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