1
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Highly adsorptive removal of Congo red from aqueous solution using TiO2 doped with Fe3+ nanoparticles. Colloid Polym Sci 2023. [DOI: 10.1007/s00396-023-05084-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023]
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2
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Jadhav HB, Raina I, Gogate PR, Annapure US, Casanova F. Sonication as a Promising Technology for the Extraction of Triacylglycerols from Fruit Seeds—A Review. FOOD BIOPROCESS TECH 2023. [DOI: 10.1007/s11947-022-02987-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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3
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Andrade-Guel M, Cabello-Alvarado C, Bartolo-Pérez P, Medellin-Banda DI, Ávila-Orta CA, Cruz-Ortiz B, Espinosa-Muñoz A, Cadenas Pliego G. Surface modification of TiO 2/ZnO nanoparticles by organic acids with enhanced methylene blue and rhodamine B dye adsorption properties. RSC Adv 2022; 12:28494-28504. [PMID: 36320524 PMCID: PMC9535401 DOI: 10.1039/d2ra04961a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Accepted: 09/27/2022] [Indexed: 11/06/2022] Open
Abstract
The United Nations Organization (UNO) has revealed that approximately 2.1 billion people do not have access to treated water. Methylene blue (MB) and rhodamine B are produced as water pollutants in textile, plastic, and dye industries. In this study, oxalic acid or lactic acid surface-modification were applied to TiO2/ZnO nanoparticles aiming to improve antibacterial and adsorption properties. The mixtures containing the corresponding acid and nanoparticles in 0.25 : 1/0.5 : 1 ratios of ZnO and TiO2 correspondingly were subjected to ultrasonic treatment with a catenoidal ultrasonic probe coupled to a homemade ultrasonic generator with an output power of 750 W, wave amplitude of 50% and variable frequency in the range of 15-50 kHz. To verify the influence of the ultrasonic treatment, different treatment times of 30, 45, 60, and 90 min were applied. Unmodified and modified TiO2/ZnO nanoparticles were characterized by FTIR, TGA, XRD, SEM, and XPS. From the results, obtained from the physicochemical characterization, in the ZTO90 and ZTL90 samples a greater modification was shown. The SEM images showed that a coating was present on the surface of the ceramic particles of the ZTL90 sample. The O 1s deconvolution in the XPS spectra indicates a greater presence of C[double bond, length as m-dash]O bonds in the ZTL90 sample. In parallel, the sample ZTL90 presented 85 and 89% adsorption efficiency for MB and rhodamine B dyes in a time of 12 min, and important antibacterial activity against E. coli and S. epidermis could be evidenced.
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Affiliation(s)
- M. Andrade-Guel
- Centro de Investigación en Química AplicadaSaltilloCoahuilaMexico
| | - C. Cabello-Alvarado
- Centro de Investigación en Química AplicadaSaltilloCoahuilaMexico,CONACYT – Centro de Investigación y de Química AplicadaMexico
| | - P. Bartolo-Pérez
- Departamento de Física Aplicada, Centro de Investigación y de Estudios Avanzados (CINVESTAV-Mérida), Instituto Politécnico NacionalMéridaYucatánMexico
| | | | - C. A. Ávila-Orta
- Centro de Investigación en Química AplicadaSaltilloCoahuilaMexico
| | - B. Cruz-Ortiz
- Universidad Autónoma de Coahuila, Facultad de Ciencias QuímicasSaltillo CoahuilaMexico
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Qin Y, Liu Z, Tao C, Shu J, Xiong X. Multifunctional β-Cyclodextrin Polymer for Simultaneous and Effective Removal of Organic Micropollutants, Heavy Metals, and Detrimental Microorganisms from Water. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c02064] [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)
- Yibie Qin
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
- Chongqing Key Laboratory of Chemical Process for Clean Energy and Resource Utilization, Chongqing University, Chongqing 400044, China
| | - Zuohua Liu
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
- Chongqing Key Laboratory of Chemical Process for Clean Energy and Resource Utilization, Chongqing University, Chongqing 400044, China
| | - Changyuan Tao
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
- Chongqing Key Laboratory of Chemical Process for Clean Energy and Resource Utilization, Chongqing University, Chongqing 400044, China
| | - Jiancheng Shu
- Key Laboratory of Solid Waste Treatment and Resource Recycle (SWUST), Ministry of Education, Southwest University of Science and Technology, 59 Qinglong Road, Mianyang 621010, China
| | - Xia Xiong
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
- Chongqing Key Laboratory of Chemical Process for Clean Energy and Resource Utilization, Chongqing University, Chongqing 400044, China
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5
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Delmez V, Tomasetti B, Daphnis T, Poleunis C, Lauzin C, Dupont-Gillain C, Delcorte A. Gas Cluster Ion Beams as a Versatile Soft-Landing Tool for the Controlled Construction of Thin (Bio)Films. ACS APPLIED BIO MATERIALS 2022; 5:3180-3192. [PMID: 35801397 DOI: 10.1021/acsabm.2c00169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Surface biofunctionalization with proteins is the key to many biomedical applications. In this study, a solvent-free method for the controlled construction of protein thin films is reported. Using large argon gas cluster ion beams, proteins are sputtered from a target (a pool of pure proteins), and collected on a chosen substrate, being nearly any solid material. Time-of-flight secondary ion mass spectrometry (ToF-SIMS) revealed the presence of intact protein molecules on the collectors. Furthermore, lowering the energy per atom in the cluster projectiles down to 1 eV/atom allowed more than 60% of bradykinin molecules to be transferred intact. This protein deposition method offers a precise control of the film thickness as the transferred protein quantity is proportional to the argon clusters ion dose reached for the transfer. This major feature enables building protein films from (sub)mono- to multilayers, without upper limitation of the thickness. A procedure was developed to measure the film thickness in situ the ToF-SIMS instrument. The versatility and potential of this soft-landing alternative for further applications is demonstrated on the one hand by building a protein thin film at the surface of paper, a substrate hardly compatible with solution-based adsorption methods. On the other hand, the possibility to achieve alternated multilayer buildup is demonstrated with the construction of a bilayer composed of bradykinin and Irganox, with the two layers well separated. These results lay the first stone toward original and complex multilayers that could previously not be considered with solution-based adsorption methods, and this regardless of the substrate nature.
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Affiliation(s)
- Vincent Delmez
- Institute of Condensed Matter and Nanosciences - Bio & Soft Matter, Université catholique de Louvain, Place Louis Pasteur, 1 bte L4.01.10, B-1348 Louvain-la-Neuve, Belgium
| | - Benjamin Tomasetti
- Institute of Condensed Matter and Nanosciences - Bio & Soft Matter, Université catholique de Louvain, Place Louis Pasteur, 1 bte L4.01.10, B-1348 Louvain-la-Neuve, Belgium
| | - Thomas Daphnis
- Institute of Condensed Matter and Nanosciences - Bio & Soft Matter, Université catholique de Louvain, Place Louis Pasteur, 1 bte L4.01.10, B-1348 Louvain-la-Neuve, Belgium
| | - Claude Poleunis
- Institute of Condensed Matter and Nanosciences - Bio & Soft Matter, Université catholique de Louvain, Place Louis Pasteur, 1 bte L4.01.10, B-1348 Louvain-la-Neuve, Belgium
| | - Clément Lauzin
- Institute of Condensed Matter and Nanosciences - Bio & Soft Matter, Université catholique de Louvain, Place Louis Pasteur, 1 bte L4.01.10, B-1348 Louvain-la-Neuve, Belgium
| | - Christine Dupont-Gillain
- Institute of Condensed Matter and Nanosciences - Bio & Soft Matter, Université catholique de Louvain, Place Louis Pasteur, 1 bte L4.01.10, B-1348 Louvain-la-Neuve, Belgium
| | - Arnaud Delcorte
- Institute of Condensed Matter and Nanosciences - Bio & Soft Matter, Université catholique de Louvain, Place Louis Pasteur, 1 bte L4.01.10, B-1348 Louvain-la-Neuve, Belgium
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6
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Azelaic acid and Melaleuca alternifolia essential oil co-loaded vesicular carrier for combinational therapy of acne. Ther Deliv 2021; 13:13-29. [PMID: 34842461 DOI: 10.4155/tde-2021-0059] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Aim: Azelaic acid (AzA), a comedolytic, antibacterial, anti-inflammatory anti-melanogenic agent, prescribed against acne vulgaris is safe on skin. Its combination with another widely used anti-acne agent, tea tree oil (EO) whose delivery is limited by volatility, instability and lipophilicity constraints was attempted. Method: Solvent injection was used to prepare AzA-EO integrated ethosomes. Result: Ethosomes were transformed into carbopol hydrogel, which exhibited pseudo-plastic properties with appreciable firmness, work of shear, stickiness and work of adhesion. The hydrogel showed better permeation and retention characteristics vis-a-vis commercial formulation (AzidermTM), when evaluated in Wistar rat skin. Further, ethosome hydrogel composite was better tolerated with no side effects. Conclusion: The findings suggests that the aforementioned strategy could be a potential treatment used for acne management.
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Montes-Zavala I, Zapata-Tello DL, Pérez E, González-Calderón JA. Rheological improvement of TiO 2 nanoparticles modified by dicarboxylic acids. J DISPER SCI TECHNOL 2021. [DOI: 10.1080/01932691.2021.1930035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- I. Montes-Zavala
- Departamento de Ingeniería Química, Tecnológico Nacional de México en Celaya, Celaya, Guanajuato, México
| | - D. L. Zapata-Tello
- Facultad de Ciencias, Universidad Autónoma de San Luis Potosí, Zona Universitaria, San Luis Potosí, San Luis Potosí, México
| | - E. Pérez
- Instituto de Física, Universidad Autónoma de San Luis Potosí, San Luis Potosí, San Luis Potosí, México
| | - J. A. González-Calderón
- Cátedras CONACYT-Instituto de Física, Universidad Autónoma de San Luis Potosí, San Luis Potosí, San Luis Potosí, México
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Cionti C, Taroni T, Sabatini V, Meroni D. Nanostructured Oxide-Based Systems for the pH-Triggered Release of Cinnamaldehyde. MATERIALS (BASEL, SWITZERLAND) 2021; 14:1536. [PMID: 33801042 PMCID: PMC8003980 DOI: 10.3390/ma14061536] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 03/10/2021] [Accepted: 03/17/2021] [Indexed: 12/20/2022]
Abstract
Cinnamaldehyde is a natural product with antibacterial, antifungal, and anti-inflammatory properties, poorly stable in environmental conditions. Systems for the controlled release of cinnamaldehyde are of great interest to the food and pharmaceutical industries. Here, a new oxide-based construct for the release of cinnamaldehyde catalyzed by acidic pH was obtained by a facile grafting method based on amino-silane linkers and imine chemistry. The grafting procedure led to a loading of ca. 5 molecules/nm2, determined on oxide powders with CHN and TGA measurements. The covalent grafting of cinnamaldehyde, demonstrated by FTIR analyses, preserved the molecule stability, simplifying storage. Release tests were performed at different pH values (between 5.0 and 7.4). Thanks to imine chemistry, a fast cinnamaldehyde (CIN) release was observed in a pH 5.0 environment. Using 1 mg/mL suspensions, CIN concentrations within the range adopted in the food industry were obtained (12.4 ppm). The grafting procedure was also performed on a porous film based on a photocatalytic oxide, demonstrating the versatility of this method, adaptable to both powders and macroscopic materials. By taking advantage of the photoactivity of the oxide, regeneration of the fouled film was achieved upon UV irradiation for 1 h, opening the door to reusable devices for the controlled release of cinnamaldehyde.
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Affiliation(s)
- Carolina Cionti
- Department of Chemistry, Faculty of Science and Technology, Università degli Studi di Milano, via Golgi 19, 20133 Milan, Italy; (C.C.); (T.T.); (V.S.)
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali, via Giusti 9, 50121 Florence, Italy
| | - Tommaso Taroni
- Department of Chemistry, Faculty of Science and Technology, Università degli Studi di Milano, via Golgi 19, 20133 Milan, Italy; (C.C.); (T.T.); (V.S.)
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali, via Giusti 9, 50121 Florence, Italy
| | - Valentina Sabatini
- Department of Chemistry, Faculty of Science and Technology, Università degli Studi di Milano, via Golgi 19, 20133 Milan, Italy; (C.C.); (T.T.); (V.S.)
| | - Daniela Meroni
- Department of Chemistry, Faculty of Science and Technology, Università degli Studi di Milano, via Golgi 19, 20133 Milan, Italy; (C.C.); (T.T.); (V.S.)
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali, via Giusti 9, 50121 Florence, Italy
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9
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Doost HA, Ghasedi A, Koushki E. Electrical effects of AuNPs and PVA polymers on optical band gap and thermo-optical properties of TiO2 nanoparticles. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.115074] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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10
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ZnO nanorods functionalized with chitosan hydrogels crosslinked with azelaic acid for transdermal drug delivery. Colloids Surf B Biointerfaces 2020; 194:111170. [DOI: 10.1016/j.colsurfb.2020.111170] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Revised: 05/14/2020] [Accepted: 06/01/2020] [Indexed: 12/17/2022]
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11
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GC-MS-Based Metabolomics Analysis of Prawn Shell Waste Co-Fermentation by Lactobacillus plantarum and Bacillus subtilis. POLYSACCHARIDES 2020. [DOI: 10.3390/polysaccharides1010004] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
GC-MS-based metabolomics were used to investigate metabolic changes in prawn shell waste during fermentation. Microbial strains Lactobacillus plantarum and Bacillus subtilis were co-fermented in a shake flask comprising of 5% (w/v) prawn shell waste and 20% (w/v) glucose as a carbon source. Analysis of the prawn shell waste fermentation showed a total of 376 metabolites detected in the culture supernatant, including 14 amino acids, 106 organic acids, and 90 antimicrobial molecules. Results show that the liquid fraction of the co-fermentation is promising for harvesting valuable metabolites for probiotics application.
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12
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Zhang W, Wang Y, Zhao H. Continuous Operation on Synthesis and Surface Modification of Rutile Nanoparticles in Designed Microfluidic Reactors. ACS OMEGA 2020; 5:12816-12824. [PMID: 32548465 PMCID: PMC7288598 DOI: 10.1021/acsomega.0c00445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Accepted: 05/14/2020] [Indexed: 06/11/2023]
Abstract
Synthesis and surface modification of rutile nanoparticles (NPs) are two distinct processes. Conventionally, they should be conducted separately. In this work, synthesis and surface modification of rutile NPs are consecutively performed in a designed microfluidic system, thereby avoiding the pilot processes, giving a high controllability and low-energy consumption of the process, and the preparation process of the coated TiO2 is simplified effectively. Samples synthesized using different strategies are compared, and the results demonstrate that the sample prepared using the microfluidic method shows a smaller particle size (60 nm) and a narrower particle size distribution range than those synthesized using the other two methods. Rutile NPs are most commonly used in terms of suspensions, the stability of the suspensions consisting of the naked and coated samples are assessed in terms of turbidity, agglomeration size, and settlement rate. Response surface methodology is employed to quantify the effects of the factors on the stability of suspensions.
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Leite C, Coppola F, Monteiro R, Russo T, Polese G, Lourenço MAO, Silva MRF, Ferreira P, Soares AMVM, Freitas R, Pereira E. Biochemical and histopathological impacts of rutile and anatase (TiO 2 forms) in Mytilus galloprovincialis. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 719:134886. [PMID: 31837882 DOI: 10.1016/j.scitotenv.2019.134886] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2019] [Revised: 10/06/2019] [Accepted: 10/06/2019] [Indexed: 06/10/2023]
Abstract
Titanium dioxide (TiO2) particles have been widely used in various industrial applications and consumer products. Due to their large production and use, they will eventually enter into aquatic environments. Once in the aquatic environment TiO2 particles may interact with the organisms and induce toxic effects. Since the most common crystallographic forms of TiO2 are rutile and anatase, the present study evaluated the effect of these two forms of TiO2 particles in Mytilus galloprovincialis. For this, mussels were exposed to different concentrations of rutile and anatase particles (0, 5, 50, 100 µg/L) for twenty-eight days. Ti concentrations, histopathological alterations and biochemical effects were evaluated. Similar Ti concentrations were found in mussels exposed to rutile and anatase, with the highest values in mussels exposed to the highest exposure concentration. Histopathological results demonstrated that both forms of TiO2 induced alterations on gills and digestive glands along the increasing exposure gradient. Biochemical markers showed that mussels exposed to rutile maintained their metabolic capacity (assessed by the activity of the Electron Transport System, ETS), while anatase increased the metabolism of mussels. Mussels exposed to rutile increased their detoxifying defences which, due to the low tested concentrations, were sufficient to avoid cellular damage. On the other hand, mussels exposed to anatase suffered cellular damages despite the increase of the antioxidant defences which may be related to the high ETS activity. Both rutile and anatase particles were toxic to M. galloprovincialis, being the highest oxidative stress exerted by the crystalline form anatase.
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Affiliation(s)
- Carla Leite
- Departamento de Biologia & CESAM, Universidade de Aveiro, 3810-193 Aveiro, Portugal
| | - Francesca Coppola
- Departamento de Biologia & CESAM, Universidade de Aveiro, 3810-193 Aveiro, Portugal
| | - Rui Monteiro
- Departamento de Química, CESAM & LAQV-REQUIMTE, Universidade de Aveiro, 3810-193 Aveiro, Portugal; CIIMAR, Universidade do Porto, 4450-208, Matosinhos, Portugal
| | - Tania Russo
- Dipartimento di Biologia, Universitá degli studi di Napoli Federico II, 80126 Napoli, Italy
| | - Gianluca Polese
- Dipartimento di Biologia, Universitá degli studi di Napoli Federico II, 80126 Napoli, Italy
| | - Mirtha A O Lourenço
- Departamento de Engenharia de Materiais e Cerâmica, CICECO-Aveiro Instituto de Materiais, Universidade de Aveiro, 3810-193 Aveiro, Portugal; Istituto Italiano di Tecnologia, Center for Sustainable Future Technologies, Via Livorno, 60, 10144 Torino, TO, Italy
| | - Mariana R F Silva
- Departamento de Engenharia de Materiais e Cerâmica, CICECO-Aveiro Instituto de Materiais, Universidade de Aveiro, 3810-193 Aveiro, Portugal
| | - Paula Ferreira
- Departamento de Engenharia de Materiais e Cerâmica, CICECO-Aveiro Instituto de Materiais, Universidade de Aveiro, 3810-193 Aveiro, Portugal
| | - Amadeu M V M Soares
- Departamento de Biologia & CESAM, Universidade de Aveiro, 3810-193 Aveiro, Portugal
| | - Rosa Freitas
- Departamento de Biologia & CESAM, Universidade de Aveiro, 3810-193 Aveiro, Portugal.
| | - Eduarda Pereira
- Departamento de Química, CESAM & LAQV-REQUIMTE, Universidade de Aveiro, 3810-193 Aveiro, Portugal
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Fabrication of TiO2/Zn2TiO4/Ag nanocomposite for synergic effects of UV radiation protection and antibacterial activity in sunscreen. Colloids Surf B Biointerfaces 2020; 187:110652. [DOI: 10.1016/j.colsurfb.2019.110652] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2019] [Revised: 11/16/2019] [Accepted: 11/16/2019] [Indexed: 11/17/2022]
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15
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Zare EN, Makvandi P. Antimicrobial Metal-Based Nanomaterials and Their Industrial and Biomedical Applications. ENGINEERED ANTIMICROBIAL SURFACES 2020. [DOI: 10.1007/978-981-15-4630-3_7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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16
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Synthesis of Nanoporous TiO2 with the Use of Diluted Hydrogen Peroxide Solution and Its Application in Gas Sensing. COATINGS 2019. [DOI: 10.3390/coatings9100681] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The chemical routes of metal oxidation in presence of hydrogen peroxide solutions are tailor-made for the synthesis of biocompatible metal oxide surfaces with clean intermediate and end products, such as oxides, hydroxides, hydrogen and water. The hydrolysis of titanium in hydrogen peroxide solutions is particularly interesting for medical applications, forming micro- and nanoscale titania surfaces. In this paper, the content of the hydrolysis solution is revised, allowing the fabrication of gas sensor devices based on nanoporous titania. Nanopore and microcrack formations were discussed in detail by monitoring the structural changes on the thin film surface with field-emission scanning electron microscopy (FE-SEM). A stable rutile crystalline phase was detected by glancing incidence X-ray diffraction (GI-XRD) measurement after repetitive hydrothermal processes. Electrical conductance measurements were carried out at high temperatures (400–600 °C) under humid airflow (40% RH@20 °C) with the injection of various concentrations of a wide set of test compounds (C2H3N, CO, H2, NO2, C2H6O), to observe the sensing capabilities of the material. Furthermore, the humidity effects on the sensing properties toward H2, CO, and C2H6O have been discussed.
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Swain B, Park JR, Park KS, Lee CG. Synthesis of cosmetic grade TiO 2-SiO 2 core-shell powder from mechanically milled TiO 2 nanopowder for commercial mass production. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 95:95-103. [PMID: 30573275 DOI: 10.1016/j.msec.2018.10.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Revised: 09/14/2018] [Accepted: 10/01/2018] [Indexed: 01/03/2023]
Abstract
TiO2 nanoparticles as an active sunscreen ingredient generate reactive oxygen species (ROS) upon UVA irradiation which is cytotoxic, genotoxic and potential to damage the DNA. The health concern and potential risks from TiO2 can be mitigated by shielding the particles through the suitable coating. Considering the advantages of SiO2, SiO2 coated TiO2 nanoparticles can be a potential material which can replace TiO2 for thickening, whitening, lubricating, and sunscreen ingredient in cosmetics. This article reports the synthesis of cosmetic grade TiO2-SiO2 core-shell nanopowder from mechanically milled TiO2 nanopowder for commercial mass production. From commercial TiO2 nanopowder was fabricated through size reduction by nanoset milling. Followed by the fabricated TiO2 nanopowder coated with SiO2 through sol-gel technique. A suitable optimum condition was explored for cosmetic grade TiO2-SiO2 core-shell nanopowder. Various physical properties and optical properties were analyzed. Synthesized of cosmetic grade TiO2-SiO2 core-shell nanopowder found to be at 100 nm size, with a homogeneous SiO2 coating having UVA protection factor 39 and sun protection factor (SPF) is 42. From the size, safety, and SPF perspective it can be an excellent cosmetic grade powder and from process simplicity perspective it can be commercially viable.
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Affiliation(s)
- Basudev Swain
- Advanced Materials & Processing Center, Institute for Advanced Engineering (IAE), Yongin, Republic of Korea.
| | - Jae Ryang Park
- Advanced Materials & Processing Center, Institute for Advanced Engineering (IAE), Yongin, Republic of Korea
| | - Kyung-Soo Park
- Advanced Materials & Processing Center, Institute for Advanced Engineering (IAE), Yongin, Republic of Korea
| | - Chan Gi Lee
- Advanced Materials & Processing Center, Institute for Advanced Engineering (IAE), Yongin, Republic of Korea.
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