1
|
Lv H, Xia X, Sun S, Niu Z, Liu J, Li X. Polylactic acid electrospun membrane loaded with cerium nitrogen co-doped titanium dioxide for visible light-triggered antibacterial photocatalytic therapy. Front Microbiol 2024; 15:1375956. [PMID: 38711973 PMCID: PMC11071086 DOI: 10.3389/fmicb.2024.1375956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Accepted: 03/26/2024] [Indexed: 05/08/2024] Open
Abstract
Wound infection caused by multidrug-resistant bacteria poses a serious threat to antibiotic therapy. Therefore, it is of vital importance to find new methods and modes for antibacterial therapy. The cerium nitrogen co-doped titanium dioxide nanoparticles (N-TiO2, 0.05Ce-N-TiO2, 0.1Ce-N-TiO2, and 0.2Ce-N-TiO2) were synthesized using the hydrothermal method in this study. Subsequently, electrospinning was employed to fabricate polylactic acid (PLA) electrospun membranes loaded with the above-mentioned nanoparticles (PLA-N, PLA-0.05, PLA-0.1, and PLA-0.2). The results indicated that cerium and nitrogen co-doping tetrabutyl titanate enhanced the visible light photocatalytic efficiency of TiO2 nanoparticles and enabled the conversion of ultraviolet light into harmless visible light. The photocatalytic reaction under visible light irradiation induced the generation of ROS, which could effectively inhibit the bacterial growth. The antibacterial assay showed that it was effective in eliminating S. aureus and E. coli and the survival rates of two types of bacteria under 30 min of irradiation were significantly below 20% in the PLA-0.2 experimental group. Moreover, the bactericidal membranes also have excellent biocompatibility performance. This bio-friendly and biodegradable membrane may be applied to skin trauma and infection in future to curb drug-resistant bacteria and provide more alternative options for antimicrobial therapy.
Collapse
Affiliation(s)
- Hanlin Lv
- Department of Stomatology, The Affiliated Hospital of Qingdao University, Qingdao, China
- School of Stomatology, Qingdao University, Qingdao, China
| | - Xiaomin Xia
- Department of Stomatology, The Affiliated Hospital of Qingdao University, Qingdao, China
- School of Stomatology, Qingdao University, Qingdao, China
| | - Sa Sun
- Department of Stomatology, The Affiliated Hospital of Qingdao University, Qingdao, China
- School of Stomatology, Qingdao University, Qingdao, China
| | - Zhaojun Niu
- Department of Stomatology, The Affiliated Hospital of Qingdao University, Qingdao, China
- School of Stomatology, Qingdao University, Qingdao, China
| | - Jie Liu
- Department of Stomatology, The Affiliated Hospital of Qingdao University, Qingdao, China
- School of Stomatology, Qingdao University, Qingdao, China
| | - Xue Li
- Department of Stomatology, The Affiliated Hospital of Qingdao University, Qingdao, China
- School of Stomatology, Qingdao University, Qingdao, China
| |
Collapse
|
2
|
Layan E, Gupta J, Ly I, Nallet F, Bentaleb A, Laurichesse E, Vallée R, Blin JL, Lebeau B, Louërat F, Le Bechec M, Moonen P, Toupance T, Pigot T, Backov R. TiO 2-SiO 2 Self-Standing Materials bearing Hierarchical Porosity: MUB-200(x) Series toward 3D-Efficient VOC Photoabatement Properties. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:3871-3882. [PMID: 36878006 DOI: 10.1021/acs.langmuir.2c03062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Three-dimensional photoactive self-standing porous materials have been synthesized through the integration of soft chemistry and colloids (emulsions, lyotrope mesophases, and P25 titania nanoparticles). Final multiscale porous ceramics bear 700-1000 m2 g-1 of micromesoporosity depending on the P25 nanoparticle contents. The applied thermal treatment does not affect the P25 anatase/rutile allotropic phase ratio. Photonic investigations correlated with the foams' morphologies suggest that the larger amount of TiO2 that is introduced, the larger the walls' density and the smaller the mean size of the void macroscopic diameters, with both effects inducing a reduction of the photon transport mean free path (lt) with the P25 content increase. A light penetration depth in the range of 6 mm is reached, thus depicting real 3D photonic scavenger behavior. The 3D photocatalytic properties of the MUB-200(x) series, studied in a dynamic "flow-through" configuration, show that the highest photoactivity (concentration of acetone ablated and concentration of CO2 formed) is obtained with the highest monolith height (volume) while providing an average of 75% mineralization. These experimental results validate the fact that these materials, bearing 3D photoactivity, are paving the path for air purification operating with self-standing porous monolith-type materials, which are much easier to handle than powders. As such, the photocatalytic systems can now be advantageously miniaturized, thereby offering indoor air treatment within vehicles/homes while drastically limiting the associated encumbrance. This volumetric counterintuitive acting mode for light-induced reactions may find other relevant advanced applications for photoinduced water splitting, solar fuel, and dye-sensitized solar cells while both optimizing photon scavenging and opening the path for the miniaturization of the processes where encumbrance or a foot-print penalty would be advantageously circumvented.
Collapse
Affiliation(s)
- Elodie Layan
- Université de Bordeaux, CRPP-UMR CNRS 5031, 115 Avenue Albert Schweitzer, 33600 Pessac, France
| | - Juhi Gupta
- Université de Bordeaux, CRPP-UMR CNRS 5031, 115 Avenue Albert Schweitzer, 33600 Pessac, France
| | - Isabelle Ly
- Université de Bordeaux, CRPP-UMR CNRS 5031, 115 Avenue Albert Schweitzer, 33600 Pessac, France
| | - Frédéric Nallet
- Université de Bordeaux, CRPP-UMR CNRS 5031, 115 Avenue Albert Schweitzer, 33600 Pessac, France
| | - Ahmed Bentaleb
- Université de Bordeaux, CRPP-UMR CNRS 5031, 115 Avenue Albert Schweitzer, 33600 Pessac, France
| | - Eric Laurichesse
- Université de Bordeaux, CRPP-UMR CNRS 5031, 115 Avenue Albert Schweitzer, 33600 Pessac, France
| | - Renaud Vallée
- Université de Bordeaux, CRPP-UMR CNRS 5031, 115 Avenue Albert Schweitzer, 33600 Pessac, France
| | - Jean-Luc Blin
- Institut Jean Barriol, UMR CNRS 7053 L2CM, Université de Lorraine, Faculté des Sciences et Technologies, BP 70239, 54506 Vandoeuvre lès Nancy cedex, France
| | - Bénédicte Lebeau
- CNRS - Institut de Science des Matériaux de Mulhouse (IS2M), 15 rue Jean Starcky - BP 2488, 68057 Mulhouse cedex, France
| | - Frédéric Louërat
- Université de Bordeaux, CRPP-UMR CNRS 5031, 115 Avenue Albert Schweitzer, 33600 Pessac, France
| | - Mickael Le Bechec
- Université de Pau et des Pays de l'Adour, E2S UPPA, CNRS, IMT Mines Ales, IPREM, 64000 Pau, France
| | - Peter Moonen
- Université de Pau et des Pays de l'Adour, E2S UPPA, CNRS, Total, LFCR, 64000 Pau, France
- Université de Pau et des Pays de l'Adour, E2S UPPA, CNRS, DMEX, 64000 Pau, France
| | - Thierry Toupance
- Université de Bordeaux, Institut des Sciences Moléculaires CNRS UMR 5255, Bât. A12, 351 Cours de la Libération, 33405 Talence cedex, France
| | - Thierry Pigot
- Université de Pau et des Pays de l'Adour, E2S UPPA, CNRS, IMT Mines Ales, IPREM, 64000 Pau, France
| | - Rénal Backov
- Université de Bordeaux, CRPP-UMR CNRS 5031, 115 Avenue Albert Schweitzer, 33600 Pessac, France
| |
Collapse
|
3
|
Kovalevskiy N, Svintsitskiy D, Cherepanova S, Yakushkin S, Martyanov O, Selishcheva S, Gribov E, Kozlov D, Selishchev D. Visible-Light-Active N-Doped TiO 2 Photocatalysts: Synthesis from TiOSO 4, Characterization, and Enhancement of Stability Via Surface Modification. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:nano12234146. [PMID: 36500767 PMCID: PMC9739126 DOI: 10.3390/nano12234146] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2022] [Revised: 11/18/2022] [Accepted: 11/21/2022] [Indexed: 05/13/2023]
Abstract
This paper describes the chemical engineering aspects for the preparation of highly active and stable nanocomposite photocatalysts based on N-doped TiO2. The synthesis is performed using titanium oxysulfate as a low-cost inorganic precursor and ammonia as a precipitating agent, as well as a source of nitrogen. Mixing the reagents under a control of pH leads to an amorphous titanium oxide hydrate, which can be further successfully converted to nanocrystalline anatase TiO2 through calcination in air at an increased temperature. The as-prepared N-doped TiO2 provides the complete oxidation of volatile organic compounds both under UV and visible light, and the action spectrum of N-doped TiO2 correlates to its absorption spectrum. The key role of paramagnetic nitrogen species in the absorption of visible light and in the visible-light-activity of N-doped TiO2 is shown using the EPR technique. Surface modification of N-doped TiO2 with copper species prevents its intense deactivation under highly powerful radiation and results in a nanocomposite photocatalyst with enhanced activity and stability. The photocatalysts prepared under different conditions are discussed regarding the effects of their characteristics on photocatalytic activity under UV and visible light.
Collapse
Affiliation(s)
- Nikita Kovalevskiy
- Department of Unconventional Catalytic Processes, Boreskov Institute of Catalysis, Novosibirsk 630090, Russia
| | - Dmitry Svintsitskiy
- Department of Heterogeneous Catalysis, Boreskov Institute of Catalysis, Novosibirsk 630090, Russia
| | - Svetlana Cherepanova
- Department of Heterogeneous Catalysis, Boreskov Institute of Catalysis, Novosibirsk 630090, Russia
| | - Stanislav Yakushkin
- Department of Physicochemical Methods of Research, Boreskov Institute of Catalysis, Novosibirsk 630090, Russia
| | - Oleg Martyanov
- Department of Physicochemical Methods of Research, Boreskov Institute of Catalysis, Novosibirsk 630090, Russia
| | | | - Evgeny Gribov
- Department of Unconventional Catalytic Processes, Boreskov Institute of Catalysis, Novosibirsk 630090, Russia
| | - Denis Kozlov
- Department of Unconventional Catalytic Processes, Boreskov Institute of Catalysis, Novosibirsk 630090, Russia
| | - Dmitry Selishchev
- Department of Unconventional Catalytic Processes, Boreskov Institute of Catalysis, Novosibirsk 630090, Russia
- Correspondence: ; Tel.: +73-8-3326-9429
| |
Collapse
|
4
|
Photocatalytic Reduction of CO 2 with N-Doped TiO 2-Based Photocatalysts Obtained in One-Pot Supercritical Synthesis. NANOMATERIALS 2022; 12:nano12111793. [PMID: 35683653 PMCID: PMC9182572 DOI: 10.3390/nano12111793] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 05/20/2022] [Accepted: 05/22/2022] [Indexed: 01/28/2023]
Abstract
The objective of this work was to analyze the effect of carbon support on the activity and selectivity of N-doped TiO2 nanoparticles. Thus, N-doped TiO2 and two types of composites, N-doped TiO2/CNT and N-doped TiO2/rGO, were prepared by a new environmentally friendly one-pot method. CNT and rGO were used as supports, triethylamine and urea as N doping agents, and titanium (IV) tetraisopropoxide and ethanol as Ti precursor and hydrolysis agent, respectively. The as-prepared photocatalysts exhibited enhanced photocatalytic performance compared to TiO2 P25 commercial catalyst during the photoreduction of CO2 with water vapor. It was imputed to the synergistic effect of N doping (reduction of semiconductor band gap energy) and carbon support (enlarging e−-h+ recombination time). The activity and selectivity of catalysts varied depending on the investigated material. Thus, whereas N-doped TiO2 nanoparticles led to a gaseous mixture, where CH4 formed the majority compared to CO, N-doped TiO2/CNT and N-doped TiO2/rGO composites almost exclusively generated CO. Regarding the activity of the catalysts, the highest production rates of CO (8 µmol/gTiO2/h) and CH4 (4 µmol/gTiO2/h) were achieved with composite N1/TiO2/rGO and N1/TiO2 nanoparticles, respectively, where superscript represents the ratio mg N/g TiO2. These rates are four times and almost forty times higher than the CO and CH4 production rates observed with commercial TiO2 P25.
Collapse
|