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Sheikhzadeh MS, Ahmadi R, Ghamari N, Afshar A. Fabrication of PTFE + TiO 2/Ag coatings on 316L/polydopamine with advanced mechanical, bio-corrosion, and antibacterial properties for stainless steel Catheters. JOURNAL OF BIOMATERIALS SCIENCE. POLYMER EDITION 2024; 35:2020-2048. [PMID: 38879811 DOI: 10.1080/09205063.2024.2365047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2024] [Accepted: 05/31/2024] [Indexed: 09/05/2024]
Abstract
This study explores the corrosion resistance and antibacterial properties of a PTFE + TiO2/Ag coating applied to 316 L stainless steel. To enhance adhesion, a polydopamine interlayer was chemically deposited onto the steel surface. The PTFE + TiO2 coating was subsequently applied through immersion, followed by the deposition of silver nanoparticles using a chemical method. Optimization of the polydopamine interlayer involved varying temperature, time, stirring speed, and drying parameters. The optimal conditions for the polydopamine interlayer were determined to be 60 °C for 1 h, 300 rpm stirring, and 24-h drying in a freeze dryer. Analytical results demonstrated that both the PTFE + TiO2 and PTFE/PTFE + TiO2/Ag coatings exhibited exceptional corrosion resistance, with corrosion currents of 3.3 × 10-5 and 3.2 × 10-4 μA/cm2, respectively. Antibacterial assessments showcased the remarkable ability of the PTFE/PTFE + TiO2/Ag coating, containing 5% silver content, to effectively inhibit bacterial penetration within a 6.5 mm radius. Furthermore, this coating displayed a water contact angle of 143°, classifying it as a hydrophobic coating. The photocatalytic efficiency (Rs) was determined to be 3.18 × 10-3 A/W, a performance level comparable to that of a standard UV sensor. These findings underscore the substantial enhancements in corrosion resistance, antibacterial performance, and hydrophobic characteristics achieved with the PTFE + TiO2/Ag coating, particularly through the novel optimization of the polydopamine interlayer. This coating exhibits great promise for multifunctional protective applications in diverse fields, particularly demonstrating its suitability for implants and bio-coatings.
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Affiliation(s)
| | - Reza Ahmadi
- Department of Materials Science and Engineering, Sharif University of Technology, Tehran, Iran
| | - Niloufar Ghamari
- Department of Materials Science and Engineering, Sharif University of Technology, Tehran, Iran
| | - Abdollah Afshar
- Department of Materials Science and Engineering, Sharif University of Technology, Tehran, Iran
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2
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Utami M, Rianjanu A, Musawwa MM, Nur SC, Lestari P, Al-Khattaf FS, Hatamleh AA, Chandrasekaran M, Chung WJ, Chang SW, Ravindran B. Photocatalytic degradation of rhodamine B dye pollutants by Fe 3O 4/SiO 2 core-shell magnetic nanocomposite functionalized with TiO 2. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2024; 46:378. [PMID: 39167275 DOI: 10.1007/s10653-024-02165-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2024] [Accepted: 08/07/2024] [Indexed: 08/23/2024]
Abstract
Significant efforts have been dedicated to creating recyclable and efficient methods for treating waste dyes, including rhodamine B (RhB). Nevertheless, challenges such as complex operational techniques, high costs, energy consumption, and inefficacy in dye removal persist. Here, the synthesis and application of TiO2/Fe3O4/SiO2 for photocatalytic degradation of RhB dye pollutants have been explored. This research was initiated with magnetite (Fe3O4) synthesis using the coprecipitation method, followed by silica (SiO2) extraction from rice husk waste using the sol-gel process, and a hydrothermal method for synthesizing titanium dioxide (TiO2) and TiO2/Fe3O4/SiO2 nanocomposite. The crystalline structure of TiO2/Fe3O4/SiO2 was obtained with Fe3O4 as the core, while TiO2 and SiO2 as the shell. The particle size analysis showed the nanosize of TiO2/Fe3O4/SiO2 (1.04 ± 0.46 nm). TiO2/Fe3O4/SiO2 nanocomposite boasts a high surface area of 48.025 m2/g, 2.2 times higher than unmodified TiO2. This nanocomposite also displayed paramagnetic properties with a saturation magnetization of 9.117 emu/g, facilitating easy separation in photocatalytic applications. The photocatalytic activity of TiO2/Fe3O4/SiO2 exhibited effectively degraded RhB, achieving a degradation rate of 53.58% and an excellent rate constant of 0.7303 min-1. The RhB photodegradation in this study requires a moderate irradiation time (60 min), uses only a tiny amount of photocatalyst (100 mg), and does not need additional chemicals. Moreover, this study has another advantage of utilizing rice husk as a silica source, offering an eco-friendly and sustainable approach.
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Affiliation(s)
- Maisari Utami
- Departement of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Islam Indonesia, Yogyakarta, 55584, Indonesia.
- Nanomaterials and Sustainable Chemistry Research Centre, Universitas Islam Indonesian, Yogyakarta, 55584, Indonesia.
| | - Aditya Rianjanu
- Department of Materials Engineering, Institut Teknologi Sumatera, Terusan Ryacudu, Way Hui, Jati Agung, Lampung Selatan, 35365, Indonesia
- Center for Green and Sustainable Materials, Institut Teknologi Sumatera, Terusan Ryacudu, Way Hui, Jati Agung, Lampung Selatan, 35365, Indonesia
| | - Muhammad Miqdam Musawwa
- Departement of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Islam Indonesia, Yogyakarta, 55584, Indonesia
| | - Selfi Citra Nur
- Departement of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Islam Indonesia, Yogyakarta, 55584, Indonesia
| | - Puji Lestari
- Department of Environmental Engineering, Faculty of Civil Engineering and Planning, Universitas Islam Indonesia, Yogyakarta, 55584, Indonesia
| | - Fatimah S Al-Khattaf
- Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box 2455, 11451, Riyadh, Saudi Arabia
| | - Ashraf Atef Hatamleh
- Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box 2455, 11451, Riyadh, Saudi Arabia
| | - Murugesan Chandrasekaran
- Department of Food Science and Biotechnology, Sejong University, 209-Neundong-Ro, Gwangjin-Gu, Seoul, 05006, South Korea
| | - Woo Jin Chung
- Department of Civil & Energy System Engineering, Kyonggi University Yeongtong-Gu, Suwon, Gyeonggi-Do, 16227, Republic of Korea.
| | - Soon Woong Chang
- Department of Civil & Energy System Engineering, Kyonggi University Yeongtong-Gu, Suwon, Gyeonggi-Do, 16227, Republic of Korea
| | - Balasubramani Ravindran
- Department of Civil & Energy System Engineering, Kyonggi University Yeongtong-Gu, Suwon, Gyeonggi-Do, 16227, Republic of Korea.
- Centre for Herbal Pharmacology and Environmental Sustainability, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam, 603103, Tamil Nadu, India.
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Jadoon JK, Pham PV. Hybrid TiO 2-RGO nanocomposite as high specific capacitance electrode for supercapacitor. NANOTECHNOLOGY 2024; 35:435706. [PMID: 39133056 DOI: 10.1088/1361-6528/ad6a6a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2024] [Accepted: 08/02/2024] [Indexed: 08/13/2024]
Abstract
This study describes the fabrication of composite electrodes comprising TiO2and reduced graphene oxide layers using a moderate-temperature hydrothermal method. The morphology, crystalline structure, chemical composition, and optical features of the prepared composites were analyzed by FE-SEM, x-ray diffraction, FTIR, and UV-visible spectroscopy. The cyclic voltammetry (CV) and Nyquist plots were used to assess the electrochemical and impedance responses of the composite electrodes, respectively. The analysis revealed that the incorporation of RGO reduced the TiO2bandgap to 3.87 eV 3.02 eV and improved the specific capacitance, enhancing the TiO2-RGO electrode's supercapacitive performance. CV studies highlight that the TiO2-RGO composite has a high specific capacitance of 152 F g-1at a substantially faster scan rate of 25 mV s-1in a 1.0 M-KOH dilute electrolyte. These findings confirmed the applicability of the fabricated electrodes as prospective supercapacitor electrodes.
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Affiliation(s)
- Jamil K Jadoon
- Department of Physics, National Sun Yat-sen University, Kaohsiung 80424, Taiwan
- Department of Physics, University of Engineering and Technology, Lahore, Pakistan
| | - Phuong V Pham
- Department of Physics, National Sun Yat-sen University, Kaohsiung 80424, Taiwan
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El-Hamid HKA, Gaber AA, Ngida REA, Sadek HEH, Khattab RM, Mandour HS. Study of microstructure and corrosion behavior of nano-Al 2O 3 coating layers on TiO 2 substrate via polymeric method and microwave combustion. Sci Rep 2024; 14:18417. [PMID: 39117707 PMCID: PMC11310324 DOI: 10.1038/s41598-024-68566-6] [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: 02/06/2024] [Accepted: 07/25/2024] [Indexed: 08/10/2024] Open
Abstract
The study describes the successful development of a TiO2 ceramic substrate with a protective nano-Al2O3 coating using two different coating techniques: microwave combustion and polymeric methods. The coated ceramics demonstrate enhanced corrosion resistance compared to the uncoated substrate. The optimal TiO2 substrate was prepared by firing it at 1000 °C. This was done to give the desired physical properties of the TiO2 substrate for the coating procedures. Nano-Al2O3 powder was coated onto the surface of the TiO2 substrates. The TiO2 substrates with the Al2O3 coating were then calcined (heat-treated) at 800 and 1000 °C. The structures, morphology, phase composition, apparent porosity, bulk density, and compressive strength of the substrate and coated substrate were characterized. Upon firing at 1000 °C, it was discovered that the two phases of TiO2-rutile and anatase-combine in the substrate. Once the substrate has been coated with nano Al2O3 at 1000 °C, the anatase is transferred into rutile. When compared to the substrate, the coated substrate resulted in a decrease in porosity and an increase in strength. The efficiency of the ceramic metal nanoparticles Al2O3 as a good coating material to protect the TiO2 substrates against the effect of the corrosive medium 0.5 M solution of H2SO4 was measured by two methods: potentio-dynamic polarization (PDP) and the electrochemical impedance spectroscopy (EIS). The results indicated that the corrosion rate was decreased after the substrate coated with alumina from (67.71 to 16.30 C.R. mm/year) and the percentage of the inhibition efficiency recorded a high value reaching (78.56%). The surface morphology and composition after electrochemical measurements are investigated using SEM and EDX analysis. After conducting the corrosion tests and all the characterization, the results indicated that the coated TiO2 substrate prepared by the polymeric method at 800 °C displayed the best physical, mechanical, and corrosion-resistant behavior.
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Affiliation(s)
- H K Abd El-Hamid
- Refractories, Ceramics and Building Materials Department, National Research Centre (NRC), El-Buhouth St., Dokki, 12622, Cairo, Egypt.
| | - A A Gaber
- Refractories, Ceramics and Building Materials Department, National Research Centre (NRC), El-Buhouth St., Dokki, 12622, Cairo, Egypt
| | - Rehab E A Ngida
- Refractories, Ceramics and Building Materials Department, National Research Centre (NRC), El-Buhouth St., Dokki, 12622, Cairo, Egypt
| | - H E H Sadek
- Refractories, Ceramics and Building Materials Department, National Research Centre (NRC), El-Buhouth St., Dokki, 12622, Cairo, Egypt
| | - R M Khattab
- Refractories, Ceramics and Building Materials Department, National Research Centre (NRC), El-Buhouth St., Dokki, 12622, Cairo, Egypt
- Pharos University, Canal El Mahmoudia Street, Smouha, Alexandria, Egypt
| | - Howida S Mandour
- Physical Chemistry Department, National Research Centre (NRC), El-Buhouth St., Dokki, 12622, Cairo, Egypt
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Pełech I, Sibera D, Staciwa P, Sobczuk K, Kusiak-Nejman E, Wanag A, Morawski AW, Schneider K, Blom R, Narkiewicz U. Thermal and/or Microwave Treatment: Insight into the Preparation of Titania-Based Materials for CO 2 Photoreduction to Green Chemicals. Molecules 2024; 29:3646. [PMID: 39125050 PMCID: PMC11314464 DOI: 10.3390/molecules29153646] [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: 06/21/2024] [Revised: 07/29/2024] [Accepted: 07/29/2024] [Indexed: 08/12/2024] Open
Abstract
Titanium dioxide was synthesized via hydrolysis of titanium (IV) isopropoxide using a sol-gel method, under neutral or basic conditions, and heated in the microwave-assisted solvothermal reactor and/or high-temperature furnace. The phase composition of the prepared samples was determined using the X-ray diffraction method. The specific surface area and pore volumes were determined through low-temperature nitrogen adsorption/desorption studies. The photoactivity of the samples was tested through photocatalytic reduction of carbon dioxide. The composition of the gas phase was analyzed using gas chromatography, and hydrogen, carbon oxide, and methane were identified. The influence of pH and heat treatment on the physicochemical properties of titania-based materials during photoreduction of carbon dioxide have been studied. It was found that the photocatalysts prepared in neutral environment were shown to result in a higher content of hydrogen, carbon monoxide, and methane in the gas phase compared to photocatalysts obtained under basic conditions. The highest amounts of hydrogen were detected in the processes using photocatalysts heated in the microwave reactor, and double-heated photocatalysts.
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Affiliation(s)
- Iwona Pełech
- Department of Inorganic Chemical Technology and Environment Engineering, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, Pułaskiego 10, 70-322 Szczecin, Poland; (D.S.); (P.S.); (K.S.); (E.K.-N.); (A.W.); (A.W.M.); (U.N.)
| | - Daniel Sibera
- Department of Inorganic Chemical Technology and Environment Engineering, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, Pułaskiego 10, 70-322 Szczecin, Poland; (D.S.); (P.S.); (K.S.); (E.K.-N.); (A.W.); (A.W.M.); (U.N.)
- Department of Construction and Road Engineering, Faculty of Civil and Environmental Engineering, West Pomeranian University of Technology in Szczecin, Piastów 50a, 70-311 Szczecin, Poland
| | - Piotr Staciwa
- Department of Inorganic Chemical Technology and Environment Engineering, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, Pułaskiego 10, 70-322 Szczecin, Poland; (D.S.); (P.S.); (K.S.); (E.K.-N.); (A.W.); (A.W.M.); (U.N.)
| | - Konrad Sobczuk
- Department of Inorganic Chemical Technology and Environment Engineering, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, Pułaskiego 10, 70-322 Szczecin, Poland; (D.S.); (P.S.); (K.S.); (E.K.-N.); (A.W.); (A.W.M.); (U.N.)
| | - Ewelina Kusiak-Nejman
- Department of Inorganic Chemical Technology and Environment Engineering, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, Pułaskiego 10, 70-322 Szczecin, Poland; (D.S.); (P.S.); (K.S.); (E.K.-N.); (A.W.); (A.W.M.); (U.N.)
| | - Agnieszka Wanag
- Department of Inorganic Chemical Technology and Environment Engineering, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, Pułaskiego 10, 70-322 Szczecin, Poland; (D.S.); (P.S.); (K.S.); (E.K.-N.); (A.W.); (A.W.M.); (U.N.)
| | - Antoni W. Morawski
- Department of Inorganic Chemical Technology and Environment Engineering, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, Pułaskiego 10, 70-322 Szczecin, Poland; (D.S.); (P.S.); (K.S.); (E.K.-N.); (A.W.); (A.W.M.); (U.N.)
| | - Kenneth Schneider
- Department of Process Technology, SINTEF Industry, Forskningsveien 1, 0373 Oslo, Norway; (K.S.); (R.B.)
| | - Richard Blom
- Department of Process Technology, SINTEF Industry, Forskningsveien 1, 0373 Oslo, Norway; (K.S.); (R.B.)
| | - Urszula Narkiewicz
- Department of Inorganic Chemical Technology and Environment Engineering, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, Pułaskiego 10, 70-322 Szczecin, Poland; (D.S.); (P.S.); (K.S.); (E.K.-N.); (A.W.); (A.W.M.); (U.N.)
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Khan H. In situ nitrogen-doped graphene-TiO 2 nano-hybrid as an efficient photocatalyst for pollutant degradation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:45383-45398. [PMID: 38963620 DOI: 10.1007/s11356-024-34114-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2024] [Accepted: 06/20/2024] [Indexed: 07/05/2024]
Abstract
To solve environmental-related issues (wastewater remediation, energy conservation and air purification) caused by rapid urbanization and industrialization, synthesis of novel and modified nanostructured photocatalyst has received increasing attention in recent years. We herein report the facile synthesis of in situ nitrogen-doped chemically anchored TiO2 with graphene through sol-gel method. The structural analysis using X-ray diffraction showed that the crystalline nitrogen-doped graphene-titanium dioxide (N-GT) nanocomposite is mainly composed of anatase with minor brookite phase. Raman spectroscopy revealed the graphene characteristic band presence at low intensity level in addition to the main bands of anatase TiO2. X-ray photoelectron spectroscopy analysis disclosed the chemical bonding of TiO2 with graphene via Ti-O-C linkage, also the substitution of nitrogen dopant in both TiO2 lattice and into the skeleton of graphene nanoflakes. UV-Vis absorption spectroscopy analysis established that the modified material can efficiently absorb the longer wavelength range photons due to its narrowed band gap. The N0.06-GT material showed the highest degradation efficiency over methylene blue (MB, ∼98%) under UV and sulfamethoxazole (SMX, ∼ 90.0%) under visible light irradiation. The increased activity of the composite is credited to the synergistic effect of high surface area via greater adsorption capacity, narrowed band gap via increased photon absorption, and reduced e-/h+ recombination via good electron acceptability of graphene nanoflakes and defect sites (Ti3+ and oxygen vacancy (Vo)). The ROS experiments further depict that primarily hydroxyl radicals (OH•) and superoxide anions (O2•-) are responsible for the pollutant degradation in the process redox reactions. In summary, our findings specify new insight into the fabrication of this new material whose efficiency can be further tested in applications like H2 production, CO2 conversion to value-added products, and in energy conservation and storage.
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Affiliation(s)
- Hayat Khan
- Department of Chemical Engineering, King Faisal University, P.O. Box 380, Al-Ahsa, 31982, Kingdom of Saudi Arabia.
- Department of Chemical Engineering, McGill University, Montreal, Quebec, H3A 2B2, Canada.
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Napruszewska BD, Walczyk A, Duraczyńska D, Kryściak-Czerwenka J, Karcz R, Gaweł A, Nowak P, Serwicka EM. TiO 2 Nanoparticles with Adjustable Phase Composition Prepared by an Inverse Microemulsion Method: Physicochemical Characterization and Photocatalytic Properties. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:1130. [PMID: 38998735 PMCID: PMC11243671 DOI: 10.3390/nano14131130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2024] [Revised: 06/26/2024] [Accepted: 06/29/2024] [Indexed: 07/14/2024]
Abstract
Titania nanoparticles (NPs) find wide application in photocatalysis, photovoltaics, gas sensing, lithium batteries, etc. One of the most important synthetic challenges is maintaining control over the polymorph composition of the prepared nanomaterial. In the present work, TiO2 NPs corresponding to anatase, rutile, or an anatase/rutile/brookite mixture were obtained at 80 °C by an inverse microemulsion method in a ternary system of water/cetyltrimethylammonium bromide/1-hexanol in a weight ratio of 17:28:55. The only synthesis variables were the preparation of the aqueous component and the nature of the Ti precursor (Ti(IV) ethoxide, isopropoxide, butoxide, or chloride). The materials were characterized with X-ray diffraction, scanning/transmission electron microscopy, N2 adsorption-desorption isotherms, FTIR and Raman vibrational spectroscopies, and diffuse reflectance spectroscopy. The synthesis products differed significantly not only in phase composition, but also in crystallinity, textural properties, and adsorption properties towards water. All TiO2 NPs were active in the photocatalytic decomposition of rhodamine B, a model dye pollutant of wastewater streams. The mixed-phase anatase/rutile/brookite nanopowders obtained from alkoxy precursors showed the best photocatalytic performance, comparable to or better than the P25 reference. The exceptionally high photoactivity was attributed to the advantageous electronic effects known to accompany multiphase titania composition, namely high specific surface area and strong surface hydration. Among the single-phase materials, anatase samples showed better photoactivity than rutile ones, and this effect was associated, primarily, with the much higher specific surface area of anatase photocatalysts.
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Affiliation(s)
- Bogna D Napruszewska
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Niezapominajek 8, 30-239 Krakow, Poland
| | - Anna Walczyk
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Niezapominajek 8, 30-239 Krakow, Poland
- Faculty of Chemistry, Jagiellonian University Krakow, Gronostajowa 2, 30-387 Krakow, Poland
| | - Dorota Duraczyńska
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Niezapominajek 8, 30-239 Krakow, Poland
| | - Joanna Kryściak-Czerwenka
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Niezapominajek 8, 30-239 Krakow, Poland
| | - Robert Karcz
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Niezapominajek 8, 30-239 Krakow, Poland
| | - Adam Gaweł
- Faculty of Geology, Geophysics and Environmental Protection, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Krakow, Poland
| | - Paweł Nowak
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Niezapominajek 8, 30-239 Krakow, Poland
| | - Ewa M Serwicka
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Niezapominajek 8, 30-239 Krakow, Poland
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Briševac D, Gabelica I, Ljubas D, Bafti A, Matijašić G, Ćurković L. Effects of TiO 2 Nanoparticles Synthesized via Microwave Assistance on Adsorption and Photocatalytic Degradation of Ciprofloxacin. Molecules 2024; 29:2935. [PMID: 38930999 PMCID: PMC11207004 DOI: 10.3390/molecules29122935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2024] [Revised: 06/15/2024] [Accepted: 06/18/2024] [Indexed: 06/28/2024] Open
Abstract
In this study, the optimal microwave-assisted sol-gel synthesis parameters for achieving TiO2 nanoparticles with the highest specific surface area and photocatalytic activity were determined. Titanium isopropoxide was used as a precursor to prepare the sol (colloidal solution) of TiO2. Isopropanol was used as a solvent; acetylacetone was used as a complexation moderator; and nitric acid was used as a catalyst. Four samples of titanium dioxide were synthesized from the prepared colloidal solution in a microwave reactor at a temperature of 150 °C for 30 min and at a temperature of 200 °C for 10, 20, and 30 min. The phase composition of the TiO2 samples was determined by X-ray diffraction analysis (XRD) and Fourier-transform infrared spectroscopy (FTIR). Nitrogen adsorption/desorption isotherms were used to determine the specific surface area and pore size distributions using the Brunauer-Emmett-Teller (BET) method. The band-gap energy values of the TiO2 samples were determined by diffuse reflectance spectroscopy (DRS). The distribution of Ti and O in the TiO2 samples was determined by SEM-EDS analysis. The effects of adsorption and photocatalytic activity of the prepared TiO2 samples were evaluated by the degradation of ciprofloxacin (CIP) as an emerging organic pollutant (EOP) under UV-A light (365 nm). The results of the photocatalytic activity of the synthesized TiO2 nanoparticles were compared to the benchmark Degussa P25 TiO2. Kinetic parameters of adsorption and photocatalysis were determined and analyzed. It was found that crystalline TiO2 nanoparticles with the highest specific surface area, the lowest energy band gap, and the highest photocatalytic degradation were the samples synthesized at 200 °C for 10 min. The results indicate that CIP degradation by all TiO2 samples prepared at 200 °C show a synergistic effect of adsorption and photocatalytic degradation in the removal process.
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Affiliation(s)
- Debora Briševac
- Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, 10000 Zagreb, Croatia; (D.B.); (I.G.); (D.L.)
| | - Ivana Gabelica
- Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, 10000 Zagreb, Croatia; (D.B.); (I.G.); (D.L.)
| | - Davor Ljubas
- Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, 10000 Zagreb, Croatia; (D.B.); (I.G.); (D.L.)
| | - Arijeta Bafti
- Faculty of Chemical Engineering and Technology, University of Zagreb, 10000 Zagreb, Croatia; (A.B.); (G.M.)
| | - Gordana Matijašić
- Faculty of Chemical Engineering and Technology, University of Zagreb, 10000 Zagreb, Croatia; (A.B.); (G.M.)
| | - Lidija Ćurković
- Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, 10000 Zagreb, Croatia; (D.B.); (I.G.); (D.L.)
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Vélez-Peña E, Jiménez VA, Manzo-Merino J, Alderete JB, Campos CH. Chlorin e6-Conjugated Mesoporous Titania Nanorods as Potential Nanoplatform for Photo-Chemotherapy. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:933. [PMID: 38869558 PMCID: PMC11173822 DOI: 10.3390/nano14110933] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2024] [Revised: 05/21/2024] [Accepted: 05/23/2024] [Indexed: 06/14/2024]
Abstract
Photodynamic therapy (PDT) has developed as an efficient strategy for cancer treatment. PDT involves the production of reactive oxygen species (ROS) by light irradiation after activating a photosensitizer (PS) in the presence of O2. PS-coupled nanomaterials offer additional advantages, as they can merge the effects of PDT with conventional enabling-combined photo-chemotherapeutics effects. In this work, mesoporous titania nanorods were surface-immobilized with Chlorin e6 (Ce6) conjugated through 3-(aminopropyl)-trimethoxysilane as a coupling agent. The mesoporous nanorods act as nano vehicles for doxorubicin delivery, and the Ce6 provides a visible light-responsive production of ROS to induce PDT. The nanomaterials were characterized by XRD, DRS, FTIR, TGA, N2 adsorption-desorption isotherms at 77 K, and TEM. The obtained materials were tested for their singlet oxygen and hydroxyl radical generation capacity using fluorescence assays. In vitro cell viability experiments with HeLa cells showed that the prepared materials are not cytotoxic in the dark, and that they exhibit photodynamic activity when irradiated with LED light (150 W m-2). Drug-loading experiments with doxorubicin (DOX) as a model chemotherapeutic drug showed that the nanostructures efficiently encapsulated DOX. The DOX-nanomaterial formulations show chemo-cytotoxic effects on Hela cells. Combined photo-chemotoxicity experiments show enhanced effects on HeLa cell viability, indicating that the conjugated nanorods are promising for use in combined therapy driven by LED light irradiation.
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Affiliation(s)
- Estefanía Vélez-Peña
- Departamento de Fisicoquímica, Facultad de Ciencias Químicas, Universidad de Concepción, Edmundo Larenas 129, Casilla 160-C, Concepción 4070371, Chile;
| | - Verónica A. Jiménez
- Departamento de Ciencias Químicas, Facultad de Ciencias Exactas, Universidad Andres Bello, Sede Concepción, Autopista Concepción-Talcahuano 7100, Talcahuano 4300866, Chile;
| | - Joaquín Manzo-Merino
- Facultad de Ciencias Químicas, Benemérita Universidad Autónoma de Puebla, Puebla 72570, Mexico;
| | - Joel B. Alderete
- Instituto de Química de Recursos Naturales (IQRN), Universidad de Talca, Avenida Lircay S/N, Casilla 747, Talca 3341717, Chile
| | - Cristian H. Campos
- Departamento de Fisicoquímica, Facultad de Ciencias Químicas, Universidad de Concepción, Edmundo Larenas 129, Casilla 160-C, Concepción 4070371, Chile;
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10
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Hamed M, El-Aal MA, Khaled MA, Ghoneim SM, Saad E, Lee JS, Sayed AEDH. Occurrence, distribution, and composition of black sand along the Red Sea, Egypt. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 923:171277. [PMID: 38408651 DOI: 10.1016/j.scitotenv.2024.171277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Revised: 02/11/2024] [Accepted: 02/23/2024] [Indexed: 02/28/2024]
Abstract
Black sand along the Red Sea is often composed of volcanic minerals and heavy minerals. The Red Sea region is known for its unique geological features, and black sand beaches can be found in various areas along its shores. The study presents a comprehensive semi-quantitative chemical analysis of black sand samples collected from various locations along the red sea, revealing significant variations in their elemental compositions. The main oxides were identified in each sample, determined through X-ray diffraction (XRD) and X-ray fluorescence (XRF) analyses, indicate diverse mineralogical compositions. The spatial distribution of minerals at each site is depicted through mapping. Additionally, Fourier-transform infrared (FTIR) spectra offer information on the functional groups present in the samples, revealing the existence of hydroxyl groups, aliphatic compounds, and adsorbed water molecules. For Qusier-Elsharm Alqbly, Safaga, Marsa Alam, Gabal Alrosass, Hurghada Titanic, Hurghada Elahiaa, Gemsa, and Ras Elbehar samples, the results highlight the presence of various minerals, such as Quartz, Calcite, Titanium Dioxide, Magnetite, Hematite, Aluminum Oxide, Zirconium Dioxide, Chromium (III) Oxide, and others, providing insights into the geological characteristics of each location. The differences in mineral content among the examined sites are linked to the geological and mineralogical makeup of the source rocks upstream and midstream in the basins that discharge into the surveyed regions. So, variations in black sand concentrations among different locations offer insights into the geological and mineralogical diversity of the studied areas along the Red Sea coast. This study addresses the existing knowledge gap by focusing on the preliminary exploration and description of the occurrence, distribution, and composition of black sand along the Red Sea in Egypt. whereas the results provide valuable insights into the geological diversity of black sand deposits in the surveyed areas, underscoring the need for additional research and interpretation of these variations. Therefore, the in-depth examination of mineralogical composition and crystal structures establishes a foundation for future investigations in the field of geology and earth sciences.
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Affiliation(s)
- Mohamed Hamed
- Department of Zoology, Faculty of Science, Al-Azhar University, Assiut Branch, 71524 Assiut, Egypt; Department of Comparative Biomedical Sciences, School of Veterinary Medicine, Louisiana State University, Skip Bertman Drive, Baton Rouge, LA 70803, USA
| | - Mohamed Abd El-Aal
- Chemistry Department, Faculty of Science, Assiut University, 71516 Assiut, Egypt
| | - Mostafa A Khaled
- Marine Science Department, National Authority for Remote Sensing & Space Sciences (NARSS), 1564 Cairo, Egypt
| | - Sobhi M Ghoneim
- Mineral Resources Department, National Authority for Remote Sensing and Space Sciences (NARSS), Cairo, Egypt
| | - Eman Saad
- Geology Department, Faculty of Science, Assiut University, Assiut 71516, Egypt
| | - Jae-Seong Lee
- Department of Biological Sciences, College of Science, Sungkyunkwan University, Suwon 16419, South Korea
| | - Alaa El-Din H Sayed
- Department of Zoology, Faculty of Science, Assiut University, 71516 Assiut, Egypt; Molecular Biology Research & Studies Institute, Assiut University, 71516 Assiut, Egypt.
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11
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Sofyan N, Jamil AM, Ridhova A, Yuwono AH, Dhaneswara D, Fergus JW. Graphene oxide doping in tropical almond ( terminalia catappa L.) fruits extract mediated green synthesis of TiO 2 nanoparticles for improved DSSC power conversion efficiency. Heliyon 2024; 10:e29370. [PMID: 38628750 PMCID: PMC11019197 DOI: 10.1016/j.heliyon.2024.e29370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Revised: 03/11/2024] [Accepted: 04/07/2024] [Indexed: 04/19/2024] Open
Abstract
The power conversion efficiency (PCE) of a dye-sensitized solar cell (DSSC) device depends on its semiconductor characteristics. Titanium dioxide (TiO2) nanoparticles are a semiconductor material commonly used in the DSSC device whose characteristics depend on the synthesis process. There are many routes to synthesize TiO2, however, they typically involve hazardous approaches, which may cause risk to the environment. Green synthesis is an environmentally friendly alternative method using ecological solvents that eliminates toxic waste and reduces energy consumption. In this work, tropical almond (Terminalia catappa L.) was used as a natural capping agent in the green synthesis to control the growth of TiO2. In addition, graphene oxide (GO) was used as a dopant to increase the performance of DSSC device. The results are convincing, in which the addition of 0.0017 % GO doping in tropical almond extract mediated green synthesis of TiO2 improved the PCE from 0.85 % to 1.72 %. These results suggest that GO-modified TiO2 nanoparticles green synthesized using tropical almond extract have great potential in the fabrication of DSSC devices with good PCE, low cost, and low environmental impact.
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Affiliation(s)
- Nofrijon Sofyan
- Department of Metallurgical and Materials Engineering, Faculty of Engineering, Universitas Indonesia, Depok 16424 Indonesia
- Advanced Materials Research Center, Faculty of Engineering, Universitas Indonesia, Depok 16424 Indonesia
| | - Alry Mochtar Jamil
- Department of Metallurgical and Materials Engineering, Faculty of Engineering, Universitas Indonesia, Depok 16424 Indonesia
| | - Aga Ridhova
- Research Center for Metallurgy, National Research and Innovation Agency, Tangerang Selatan, Banten 15314, Indonesia
| | - Akhmad Herman Yuwono
- Department of Metallurgical and Materials Engineering, Faculty of Engineering, Universitas Indonesia, Depok 16424 Indonesia
- Advanced Materials Research Center, Faculty of Engineering, Universitas Indonesia, Depok 16424 Indonesia
| | - Donanta Dhaneswara
- Department of Metallurgical and Materials Engineering, Faculty of Engineering, Universitas Indonesia, Depok 16424 Indonesia
- Advanced Materials Research Center, Faculty of Engineering, Universitas Indonesia, Depok 16424 Indonesia
| | - Jeffrey W. Fergus
- Materials Research and Education Center, Auburn University, Auburn, AL 36849, USA
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12
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Jebeli SJ, Aghdam RM, Najjari A, Soltani R. Evaluation of bioactivity and antibacterial properties of Ti6Al4V-based green biocomposite implant encompassing TiO 2 nanotube arrays and garlic extract. Heliyon 2024; 10:e28588. [PMID: 38576572 PMCID: PMC10990949 DOI: 10.1016/j.heliyon.2024.e28588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2023] [Revised: 03/20/2024] [Accepted: 03/21/2024] [Indexed: 04/06/2024] Open
Abstract
This study involved the incorporation of an antibacterial garlic extract into titanium oxide nanotubes (TNTs) formed via the anodization of Ti6Al4V implants. The garlic extract, obtained through low-temperature extraction aided by ultrasound waves, was loaded into the nanotubes. The presence of the nanotubes was confirmed through X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDS), and scanning electron microscopy (SEM). Fourier-transform infrared spectroscopy (FT-IR) and gas chromatography-mass spectrometry (GC-MS) were used to investigate the presence of bioactive compounds, particularly sulfur compounds responsible for garlic's antibacterial effects. The impact of loading two concentrations (0.1 and 0.2 g per milliliter) of garlic extract on Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) bacteria was examined. Results indicated a decrease in the growth range of S. aureus from 109 to 106 (CFU/ml) and E. coli from 1011 to 109 (CFU/ml) upon treatment. Additionally, cell adhesion and viability tests conducted on MG63 cells revealed an 8% increase in cell viability with the 0.1 g per milliliter concentration and a 35% decrease with the 0.2 g per milliliter concentration of garlic extract after 72 h of incubation (They have been evaluated by Microculture tetrazolium (MTT) assay). GC-MS analysis identified the presence of diethyl phthalate compounds in the garlic extract, suggesting a potential correlation with cellular toxicity observed in the sample with the higher concentration (0.2 g per milliliter) of garlic extract. Overall, the TNTs loaded with 0.1 g per milliliter of garlic extract simultaneously demonstrated antibacterial activity, cell viability, adhesion, and growth enhancement.
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Affiliation(s)
- Sadegh Jafari Jebeli
- School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, P.O. Box: 11155-4563, Tehran, Iran
| | - Rouhollah Mehdinavaz Aghdam
- School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, P.O. Box: 11155-4563, Tehran, Iran
| | - Aryan Najjari
- School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, P.O. Box: 11155-4563, Tehran, Iran
| | - Reza Soltani
- School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, P.O. Box: 11155-4563, Tehran, Iran
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13
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Bouzidi I, Fkiri A, Saidani W, Khazri A, Mezni A, Mougin K, Beyrem H, Sellami B. The pharmaceutical triclosan induced oxidative stress and physiological disorder in marine organism and nanoparticles as a potential mitigating tool. MARINE ENVIRONMENTAL RESEARCH 2024; 196:106424. [PMID: 38428315 DOI: 10.1016/j.marenvres.2024.106424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 01/05/2024] [Accepted: 02/24/2024] [Indexed: 03/03/2024]
Abstract
Environmental research plays a crucial role in formulating novel approaches to pollution management and preservation of biodiversity. This study aims to assess the potential harm of pharmaceutical triclosan (TCS) to non-target aquatic organism, the mussel Mytilus galloprovincialis. Furthermore, our study investigates the potential effectiveness of TiO2 and ZnO nanomaterials (TiO2 NPs and ZnO NPs) in degrading TCS. To ascertain the morphology, structure, and stability of the nanomaterials, several chemical techniques were employed. To evaluate the impact of TCS, TiO2 NPs, and ZnO NPs, both physiological (filtration rate (FR) and respiration rate (RR)), antioxidant enzymes (superoxide dismutase (SOD), catalase (CAT), glutathione-S-transferase (GST)) activities and malondialdehyde (MDA) contents were measured in M. galloprovincialis gills and digestive gland. The mussel's responses varied depending on the contaminant, concentration, and organ, underscoring the significance of compiling these factors in ecotoxicity tests. The main toxic mechanisms of TCS and ZnO NPs at a concentration of 100 μg/L were likely to be a decrease in FR and RR, an increase in oxidative stress, and increased lipid peroxidation. Our findings indicate that a mixture of TCS and NPs has an antagonist effect on the gills and digestive gland. This effect is particularly notable in the case of TCS2 = 100 μg/L combined with TiO2 NP2 = 100 μg/L, which warrants further investigation to determine the underlying mechanism. Additionally, our results suggest that TiO2 NPs are more effective than ZnO NPs at degrading TCS, which may have practical implications for pharmaceutical control in marine ecosystems and in water purification plants. In summary, our study provides valuable information on the impact of pharmaceuticals on non-target organisms and sheds light on potential solutions for their removal from aqueous environments.
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Affiliation(s)
- Imen Bouzidi
- Laboratoire de Biosurveillance de l'Environnement (LBE), Unité d'Ecotoxicologie et d'Ecologie Côtière (GREEC), Faculté des Sciences de Bizerte, Zarzouna, Bizerte, 7021, Tunisia; Institut Supérieur de Biotechnologies de Béja, Université de Jendouba, Jendouba, 8189, Tunisia
| | - Anis Fkiri
- Laboratory of Hetero-Organic Compounds and Nanostructured Materials (LR18ES11), Faculty of Sciences of Bizerte, University of Carthage, Zarzouna, 7021, Tunisia
| | - Wiem Saidani
- Laboratoire de Biosurveillance de l'Environnement (LBE), Unité d'Ecotoxicologie et d'Ecologie Côtière (GREEC), Faculté des Sciences de Bizerte, Zarzouna, Bizerte, 7021, Tunisia
| | - Abdelhafidh Khazri
- Laboratoire de Biosurveillance de l'Environnement (LBE), Unité d'Ecotoxicologie et d'Ecologie Côtière (GREEC), Faculté des Sciences de Bizerte, Zarzouna, Bizerte, 7021, Tunisia
| | - Amine Mezni
- Laboratory of Hetero-Organic Compounds and Nanostructured Materials (LR18ES11), Faculty of Sciences of Bizerte, University of Carthage, Zarzouna, 7021, Tunisia
| | - Karine Mougin
- Institut de Science des Matériaux, Université de Haute Alsace, IS2M-CNRS-UMR 7361, 15 Rue Jean Starcky, 68057, Mulhouse, France
| | - Hamouda Beyrem
- Laboratoire de Biosurveillance de l'Environnement (LBE), Unité d'Ecotoxicologie et d'Ecologie Côtière (GREEC), Faculté des Sciences de Bizerte, Zarzouna, Bizerte, 7021, Tunisia
| | - Badreddine Sellami
- National Institute of Marine Sciences and Technologies, Tabarka, 8110, Tunisia.
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14
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Gallegos-Cerda SD, Hernández-Varela JD, Chanona Pérez JJ, Huerta-Aguilar CA, González Victoriano L, Arredondo-Tamayo B, Reséndiz Hernández O. Development of a low-cost photocatalytic aerogel based on cellulose, carbon nanotubes, and TiO 2 nanoparticles for the degradation of organic dyes. Carbohydr Polym 2024; 324:121476. [PMID: 37985080 DOI: 10.1016/j.carbpol.2023.121476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 09/25/2023] [Accepted: 10/08/2023] [Indexed: 11/22/2023]
Abstract
A hybrid ultra-light and porous cellulose aerogel was prepared by extracting cellulose fibers from white paper, alkali/urea as a crosslinker agent, and functionalized with CNTs and pure anatase TiO2 nanoparticles. Since CNTs work as mechanical reinforcement for aerogels, physical and mechanical properties were measured. Besides, since TiO2 acts as a photocatalyst for degrading dyes (rhodamine B and methylene blue), UV-Vis spectroscopy under UV light, visible light, and darkroom was used to evaluate the degradation process. XRD, FTIR, and TGA were employed to characterize the structural and thermal properties of the composite. The nanostructured solid network of aerogels was visualized in SEM microscopy confirming the structural uniformity of cellulose and TiO2-CNTs onto fibers. Moreover, CLSM was used to study the nano-porous network distribution of cellulose fibers and porosity, and the functionalization process in a detailed way. Finally, the photocatalytic activity of aerogels was evaluated by degradation of dye aqueous solutions, with the best photocatalytic removal (>97 %) occurring after 110 min of UV irradiation. In addition, HPLC-MS facilitated the proposed mechanism for the degradation of dyes. These results confirm that cellulose aerogels coupled with nanomaterials enable the creation of economic support to reduce water pollution with higher decontamination rates.
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Affiliation(s)
- Susana Dianey Gallegos-Cerda
- Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Av. Wilfrido Massieu s/n, 07738 Mexico City, Mexico
| | - Josué David Hernández-Varela
- Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Av. Wilfrido Massieu s/n, 07738 Mexico City, Mexico
| | - José Jorge Chanona Pérez
- Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Av. Wilfrido Massieu s/n, 07738 Mexico City, Mexico.
| | | | - Lizbeth González Victoriano
- Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Av. Wilfrido Massieu s/n, 07738 Mexico City, Mexico
| | - Benjamín Arredondo-Tamayo
- Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Av. Wilfrido Massieu s/n, 07738 Mexico City, Mexico; Universidad Tecnológica de México, Campus Marina-Cuitláhuac, San Salvador Xochimanca, Azcapotzalco, 02870 Mexico City, Mexico
| | - Omar Reséndiz Hernández
- Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada, Instituto Politécnico Nacional, Av. Legaría, Irrigación, 11500 Mexico City, Mexico
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15
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Yitagesu G, Leku DT, Workneh GA. Green Synthesis of TiO 2 Using Impatiens rothii Hook. f. Leaf Extract for Efficient Removal of Methylene Blue Dye. ACS OMEGA 2023; 8:43999-44012. [PMID: 38027313 PMCID: PMC10666146 DOI: 10.1021/acsomega.3c06142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/19/2023] [Revised: 10/16/2023] [Accepted: 10/26/2023] [Indexed: 12/01/2023]
Abstract
In this work, TiO2 nanoparticles (NPs) were effectively synthesized by a green method using the Impatiens rothii Hook.f. leaf (IL) extract as a capping and reducing agent. The as-synthesized TiO2 NPs were characterized by different characterization methods such as the Brunauer-Emmett-Teller (BET) analysis, high-resolution transmission electron microscopy (HRTEM), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), diffused reflectance spectroscopy (DRS), and X-ray diffraction (XRD) and Raman spectroscopy. The specific surface area from BET analysis was found to be 65 m2/g. The average crystallite size from XRD analysis and average particle size from SEM analysis were found to be ∼11 and ∼25 nm, respectively. The Raman spectroscopy and XRD results showed that the biosynthesized (IL-TiO2) nanoparticles were purely anatase phase. XPS analysis illustrated the formation of Titania with an oxidation state of +4. The DRS study showcased that a blue-shifted intense absorption peak of IL-TiO2 (3.39 eV) compared to the bulk material reported in the literature (3.2 eV). HRTEM micrograph showed the presence of grain boundary with d spacings of 0.352, 0.245, and 0.190, which correspond to the lattice planes of (101), (004), and (200), respectively. From the EDX analysis, the weight percents of titanium and oxygen were found to be 54.33 and 45.67%, respectively. The photoinduced degradation of methylene blue (MB) dye was investigated in the presence of biosynthesized IL-TiO2 NPs photocatalyst. The effect of parameters like catalyst dosage (30 mg/L), initial concentration of MB (15 ppm), pH (10.5), and contact time (100 min) on the removal efficiency was optimized. The maximum photodegradation efficiency under the optimized conditions was found to be 98%.
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Affiliation(s)
- Getye
Behailu Yitagesu
- Department
of Applied Chemistry, School of Applied and Natural Sciences, Adama Science and Technology University, Adama P.O. Box 1888, Ethiopia
| | - Dereje Tsegaye Leku
- Department
of Applied Chemistry, School of Applied and Natural Sciences, Adama Science and Technology University, Adama P.O. Box 1888, Ethiopia
| | - Getachew Adam Workneh
- Department
of Industrial Chemistry, Addis Ababa Science
and Technology University, Addis Ababa P.O. Box 16417, Ethiopia
- Sustainable
Energy Center of Excellence, Addis Ababa
Science and Technology University, Addis Ababa P.O. Box 16417, Ethiopia
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16
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Ananthapadmanabhan SS, Rout TK, Chatterjee S, Dasgupta T, Parida S. Corrosion-Resistant Hydrophobic Thermal Barrier Composite Coating on Metal Strip: A New Dimension to Steel Strips for Roofing Segment. ACS APPLIED MATERIALS & INTERFACES 2023; 15:51737-51752. [PMID: 37874982 DOI: 10.1021/acsami.3c11712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2023]
Abstract
This study demonstrates a cost-effective, thin, multifunctional composite coating system with outstanding thermal insulation for thermal management and heat shield applications, such as roofs, as well as outstanding resistance to corrosion. The hydrophobic multifunctional epoxy composite coating systems were designed with surface-modified fillers to impart both reduced heat conduction and high infrared reflectance in a thin coating with a 65-100 μm dry film thickness (DFT). With a judicial combination of hollow microspheres (HMS) activated and modified with silica (sHMS) and stearic acid-modified TiO2 (sMO), the developed composite coating attained the highest thermal insulation property with a temperature drop of 21-31 °C at different distances below the coated panel, which is superior to the values of temperature drop reported earlier. The high solar reflectance of the composite coating in the near-infrared (NIR) region exceeds 72% with a low thermal conductivity of 0.178 W m-1 K-1. After 720 h of exposure in a 3.5 wt % NaCl solution, the composite coating revealed a corrosion protection efficiency of 99%. The work demonstrates that high solar reflectivity and low thermal conductivity must be active simultaneously to achieve superior thermal shielding in a thin coating on a metal. A careful selection of fillers and appropriate surface modifications ensures hydrophobicity and proper distribution of the fillers in the coating for a high barrier effect to prevent environmental deterioration. With these superior performance parameters, the developed composite coatings make an essential contribution to energy sustainability and the protection against environmental degradation.
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Affiliation(s)
| | | | | | - Titas Dasgupta
- Indian Institute of Technology Bombay, Mumbai, Maharashtra 400076, India
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17
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Suthar JK, Rakesh B, Vaidya A, Ravindran S. Comprehensive Analysis of Titanium Oxide Nanoparticle Size and Surface Properties on Neuronal PC-12 Cells: Unraveling Cytotoxicity, Dopaminergic Gene Expression, and Acetylcholinesterase Inhibition. J Xenobiot 2023; 13:662-684. [PMID: 37987444 PMCID: PMC10660528 DOI: 10.3390/jox13040043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2023] [Revised: 09/30/2023] [Accepted: 10/05/2023] [Indexed: 11/22/2023] Open
Abstract
Titanium oxide nanoparticles can penetrate the blood-brain barrier, infiltrate the central nervous system, and induce neurotoxicity. One of the most often utilized nanoparticles has been investigated for their neurotoxicity in many studies. Nonetheless, there remains an unexplored aspect regarding the comparative analysis of particles varying in size and nanoparticles of identical dimensions, both with and devoid of surface coating. In the current study, we synthesized two differently sized nanoparticles, TiO2-10 (10 nm) and TiO2-22 (22 nm), and nanoparticles of the same size but with a polyvinylpyrrolidone surface coating (TiO2-PVP, 22 nm) and studied their toxic effects on neural PC-12 cells. The results highlighted significant dose- and time-dependent cytotoxicity at concentrations ≥10 μg/mL. The exposure of TiO2 nanoparticles significantly elevated reactive oxygen and nitrogen species levels, IL-6 and TNF-α levels, altered the mitochondrial membrane potential, and enhanced apoptosis-related caspase-3 activity, irrespective of size and surface coating. The interaction of the nanoparticles with acetylcholinesterase enzyme activity was also investigated, and the results revealed a dose-dependent suppression of enzymatic activity. However, the gene expression studies indicated no effect on the expression of all six genes associated with the dopaminergic system upon exposure to 10 μg/mL for any nanoparticle. The results demonstrated no significant difference between the outcomes of TiO2-10 and TiO2-22 NPs. However, the polyvinylpyrrolidone surface coating was able to attenuate the neurotoxic effects. These findings suggest that as the TiO2 nanoparticles get smaller (towards 0 nm), they might promote apoptosis and inflammatory reactions in neural cells via oxidative stress, irrespective of their size.
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Affiliation(s)
- Jitendra Kumar Suthar
- Symbiosis School of Biological Sciences, Faculty of Medical and Health Sciences, Symbiosis International (Deemed) University, Pune 412115, India;
| | - Balaji Rakesh
- Symbiosis Institute of Technology, Symbiosis International (Deemed) University, Pune 412115, India;
| | - Anuradha Vaidya
- Symbiosis Centre for Stem Cell Research, Symbiosis School of Biological Sciences, Symbiosis International (Deemed) University, Pune 412115, India;
| | - Selvan Ravindran
- Symbiosis School of Biological Sciences, Faculty of Medical and Health Sciences, Symbiosis International (Deemed) University, Pune 412115, India;
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18
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Sawunyama L, Oyewo O, Onwudiwe DC, Makgato SS. Photocatalytic degradation of tetracycline using surface defective black TiO 2-ZnO heterojunction photocatalyst under visible light. Heliyon 2023; 9:e21423. [PMID: 38027928 PMCID: PMC10661122 DOI: 10.1016/j.heliyon.2023.e21423] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2023] [Revised: 10/14/2023] [Accepted: 10/20/2023] [Indexed: 12/01/2023] Open
Abstract
Fabrication of heterojunction and surface defective engineering, through the formation of oxygen vacancies, are among the various photocatalytic enhancement techniques. A combination of these techniques has the prospect of enhancing photocatalytic activities through improved light absorption capabilities and charge separation process of the photocatalysts. In this study, a heterojunction of black titanium oxide-zinc oxide (BTiO2-ZnO) nanocomposite was synthesized using the conventional sol-gel approach, coupled with aluminum foil-assisted NaBH4 reduction. The structure, morphology, surface properties, and optical characteristics of the synthesized material were studied using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), UV-vis absorption spectra, scanning electron microscope (SEM), Energy-dispersive X-ray spectroscopy (EDS), and transmission electron microscope (TEM). The XRD confirmed the successful formation of BTiO2-ZnO heterostructure, while SEM revealed the structural morphology as pseudo-spherical with slight agglomeration. BTiO2-ZnO was found to be more efficient than BTiO2 and BZnO for the removal of tetracycline with degradation efficiencies of 63, 58, and 56 % respectively. The effects of process parameters such as the amount of photocatalyst, pollutant's concentration, and the initial solution pH on photocatalytic degradation study were systematically explored. The results confirm that the formation of the heterostructure from BTiO2 and BZnO could offer a facile route to improving the catalytic degradation of tetracycline. Therefore, this study offers a novel perspective on the design of efficient metal oxide photocatalyst systems that rely on the integration of defect engineering and heterojunction for the removal of organic contaminants.
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Affiliation(s)
- Lawrence Sawunyama
- Material Science Innovation and Modelling (MaSIM) Research Focus Area, Faculty of Natural and Agricultural Sciences, North-West University, Mafikeng Campus, Private Bag X2046, Mmabatho, 2735, South Africa
| | - Opeyemi Oyewo
- Department of Chemical Engineering, College of Science, Engineering and Technology, University of South Africa, South Africa
| | - Damian C. Onwudiwe
- Material Science Innovation and Modelling (MaSIM) Research Focus Area, Faculty of Natural and Agricultural Sciences, North-West University, Mafikeng Campus, Private Bag X2046, Mmabatho, 2735, South Africa
- Department of Chemistry, School of Physical and Chemical Sciences, Faculty of Natural and Agricultural Sciences, North-West University, Mafikeng Campus, Private Bag X2046, Mmabatho 2735, South Africa
| | - Seshibe S. Makgato
- Department of Chemical Engineering, College of Science, Engineering and Technology, University of South Africa, South Africa
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19
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Selopal GS, Abdelkarim O, Kaur J, Liu J, Jin L, Chen Z, Navarro-Pardo F, Manzhos S, Sun S, Yurtsever A, Zarrin H, Wang ZM, Rosei F. Surface engineering of two-dimensional hexagonal boron-nitride for optoelectronic devices. NANOSCALE 2023; 15:15810-15830. [PMID: 37743729 DOI: 10.1039/d3nr03864e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/26/2023]
Abstract
Two-dimensional hexagonal boron nitride (2D h-BN) is being extensively studied in optoelectronic devices due to its electronic and photonic properties. However, the controlled optimization of h-BN's insulating properties is necessary to fully explore its potential in energy conversion and storage devices. In this work, we engineered the surface of h-BN nanoflakes via one-step in situ chemical functionalization using a liquid-phase exfoliation approach. The functionalized h-BN (F-h-BN) nanoflakes were subsequently dispersed on the surface of TiO2 to tune the TiO2/QDs interface of the optoelectronic device. The photoelectrochemical (PEC) devices based on TiO2/F-h-BN/QDs with optimized addition of carbon nanotubes (CNTs) and scattering layers showed 46% improvement compared to the control device (TiO2/QDs). This significant improvement is attributed to the reduced trap/carrier recombination and enhanced carrier injection rate of the TiO2-CNTs/F-h-BN/QDs photoanode. Furthermore, by employing an optimized TiO2-CNTs/F-h-BN/QDs photoanode, QDs-sensitized solar cells (QDSCs) yield an 18% improvement in photoconversion efficiency. This represents a potential and adaptability of our approach, and pathway to explore surface-engineered 2D materials to optimize the interface of solar energy conversion and other emerging optoelectronic devices.
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Affiliation(s)
- Gurpreet Singh Selopal
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, PR China.
- Department of Engineering, Faculty of Agriculture, Dalhousie University, Truro, B2N 5E3, NS, Canada.
- Institut National de la Recherche Scientifique, Centre Énergie, Matériaux et Télécommunications, 1650 Boul. Lionel Boulet, Varennes, J3X 1P7, QC, Canada.
| | - Omar Abdelkarim
- Institut National de la Recherche Scientifique, Centre Énergie, Matériaux et Télécommunications, 1650 Boul. Lionel Boulet, Varennes, J3X 1P7, QC, Canada.
| | - Jasneet Kaur
- Department of Chemical Engineering, Faculty of Engineering & Architectural Science, Toronto Metropolitan University, Toronto, M5B 2K3, ON, Canada
- Department of Physics and Yousef Haj-Ahmad Department of Engineering, Faculty of Mathematics and Science, Brock University, 1812 Sir Isaac Brock Way, St. Catharines L2S 3A1, ON, Canada
| | - Jiabin Liu
- Institut National de la Recherche Scientifique, Centre Énergie, Matériaux et Télécommunications, 1650 Boul. Lionel Boulet, Varennes, J3X 1P7, QC, Canada.
| | - Lei Jin
- Institut National de la Recherche Scientifique, Centre Énergie, Matériaux et Télécommunications, 1650 Boul. Lionel Boulet, Varennes, J3X 1P7, QC, Canada.
| | - Zhangsen Chen
- Institut National de la Recherche Scientifique, Centre Énergie, Matériaux et Télécommunications, 1650 Boul. Lionel Boulet, Varennes, J3X 1P7, QC, Canada.
| | - Fabiola Navarro-Pardo
- Institut National de la Recherche Scientifique, Centre Énergie, Matériaux et Télécommunications, 1650 Boul. Lionel Boulet, Varennes, J3X 1P7, QC, Canada.
| | - Sergei Manzhos
- Institut National de la Recherche Scientifique, Centre Énergie, Matériaux et Télécommunications, 1650 Boul. Lionel Boulet, Varennes, J3X 1P7, QC, Canada.
| | - Shuhui Sun
- Institut National de la Recherche Scientifique, Centre Énergie, Matériaux et Télécommunications, 1650 Boul. Lionel Boulet, Varennes, J3X 1P7, QC, Canada.
| | - Aycan Yurtsever
- Institut National de la Recherche Scientifique, Centre Énergie, Matériaux et Télécommunications, 1650 Boul. Lionel Boulet, Varennes, J3X 1P7, QC, Canada.
| | - Hadis Zarrin
- Department of Chemical Engineering, Faculty of Engineering & Architectural Science, Toronto Metropolitan University, Toronto, M5B 2K3, ON, Canada
| | - Zhiming M Wang
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, PR China.
- Institute for Advanced Study, Chengdu University, Chengdu, Sichuan, 610106, P. R. China
| | - Federico Rosei
- Institut National de la Recherche Scientifique, Centre Énergie, Matériaux et Télécommunications, 1650 Boul. Lionel Boulet, Varennes, J3X 1P7, QC, Canada.
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20
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Hammedi T, Bensouilah R, Ouakouak A, Llorca J, Cabello FM, Ksibi Z. Study of the catalytic wet air oxidation of p-hydroxybenzoic acid on a fresh ruthenium catalyst supported by different oxides. Heliyon 2023; 9:e20875. [PMID: 37867862 PMCID: PMC10589868 DOI: 10.1016/j.heliyon.2023.e20875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 10/04/2023] [Accepted: 10/09/2023] [Indexed: 10/24/2023] Open
Abstract
The catalytic wet air oxidation (CWAO) of p-hydroxybenzoic acid (p-HBA) was conducted in a batch reactor at 140 °C, and at a total air pressure of 50 bar over Ru-based catalysts. Four materials were selected as supports - TiO2, CeO2-TiO2, ZrO2-TiO2, and La2O3-TiO2 - all of which had mesopores in their texture and pollutant adsorption capacities. The supports were prepared by the sol-gel method, and then impregnated with 3 wt% of Ru precursor. Such characterization techniques as N2-sorption, XRD, XPS, H2-TPR, NH3-TPD, TEM, and HAADF-STEM were used to analyze the different solids. The correlation between catalytic activities and physicochemical properties was discussed. A significant specific surface area (SBET), a large amount of surface-active oxygen, and Lewis acidity sites were observed on cerium-containing catalysts (Ru/CeTi). Fresh Ru catalysts containing cerium showed higher activity than Ru/TiO2, Ru/ZrTi, and Ru/LaTi catalysts. It is assumed that the acidic sites and surface oxygen trap the p-HBA molecule, thus increasing the catalytic properties of the Ru particles which interact with the surface oxygen through the cerium redox process (Ce3+/Ce4+). As the presence of cerium increases surface-active oxygen, it inhibits the deposition of carbon on the surface of the Ru catalyst. The pseudo-second order (PSO) model adequately described the kinetic data of the p-HBA oxidation reaction using Ru catalysts.
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Affiliation(s)
- Tijani Hammedi
- University of Tunis ElManar, Faculty of Sciences of Tunis, Laboratory of Materials Chemistry and Catalysis LR01ES08, Tunis, 2092, Tunisia
| | - Rahma Bensouilah
- University of Tunis ElManar, Faculty of Sciences of Tunis, Laboratory of Materials Chemistry and Catalysis LR01ES08, Tunis, 2092, Tunisia
| | - Abdelkader Ouakouak
- Research Laboratory in Subterranean and Surface Hydraulics, University of Biskra, PO Box 145, Biskra, 07000, Algeria
| | - Jordi Llorca
- Universitat Politècnica de Catalunya, Institute of Energy Technologies, Catalysis and Energy Laboratory, Av. Diagonal 647, 08028, Barcelona, Spain
| | - Francisco Medina Cabello
- Rovira i Virgili University, Chemical Engineering Department, Av/Països Catalans 26, 43007, Tarragona, Spain
| | - Zouhaier Ksibi
- University of Tunis ElManar, Faculty of Sciences of Tunis, Laboratory of Materials Chemistry and Catalysis LR01ES08, Tunis, 2092, Tunisia
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21
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Ziad R, Columbus S, Elgamouz A, Daoudi K, Kawde AN, Ramachandran K, Gaidi M. Multi-functional silver nanoprism-titanium dioxide hybrid nanoarrays for trace-level SERS sensing and photocatalytic removal of hazardous organic pollutants. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 297:122701. [PMID: 37054569 DOI: 10.1016/j.saa.2023.122701] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2023] [Revised: 03/14/2023] [Accepted: 03/31/2023] [Indexed: 05/14/2023]
Abstract
Owing to the excellent optoelectronic properties of metal nanoparticle-semiconductor interfaces; hybrid substrates with superior catalytic and sensing properties can be designed. In the present study, we have attempted to evaluate anisotropic silver nanoprisms (SNP) functionalized titanium dioxide (TiO2) particles for multifunctional applications such as SERS sensing and photocatalytic decomposition of hazardous organic pollutants. Hierarchical TiO2/SNP hybrid arrays have been fabricated via facile and low-cost casting techniques. The structural, compositional, and optical characteristics of TiO2/SNP hybrid arrays were well elucidated and correlated to SERS activities. SERS studies revealed that TiO2/SNP nanoarrays possess almost 288 times enhancement compared to bare TiO2 substrates and 2.6 times enhancement than pristine SNP. The fabricated nanoarrays demonstrated detection limits down to 10-12 M concentration levels and lower spot-to-spot variability of ∼ 11%. The photocatalytic studies showed that almost 94 and 86% of rhodamine B and methylene blue were decomposed within 90 min of visible light exposure. Besides, two times enhancement in photocatalytic activities of TiO2/SNP hybrid substrates was also observed than bare TiO2. The highest photocatalytic activity was exhibited by SNP to TiO2 molar ratio of 1.5 × 10-3. The electrochemical surface area and the interfacial electron-transfer resistance were increased with the increment in TiO2/SNP composite load from 3 to 7 wt%. Differential Pulse Voltammetry (DPV) analysis revealed a higher RhB degradation potential of TiO2/SNP arrays than SNP or TiO2. The synthesized hybrids exhibited excellent reusability without any significant deterioration in photocatalytic properties over five successive cycles. TiO2/SNP hybrid arrays were proved to be multiple platforms for sensing and degrading hazardous pollutants for environmental applications.
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Affiliation(s)
- Rania Ziad
- Pure and Applied Chemistry Group, Department of Chemistry, College of Sciences, University of Sharjah, P. O. Box 27272, United Arab Emirates; Center for Advanced Materials Research, Research Institute of Sciences and Engineering, University of Sharjah, P. O. Box 27272, Sharjah, United Arab Emirates
| | - Soumya Columbus
- Center for Advanced Materials Research, Research Institute of Sciences and Engineering, University of Sharjah, P. O. Box 27272, Sharjah, United Arab Emirates.
| | - Abdelaziz Elgamouz
- Pure and Applied Chemistry Group, Department of Chemistry, College of Sciences, University of Sharjah, P. O. Box 27272, United Arab Emirates.
| | - Kais Daoudi
- Center for Advanced Materials Research, Research Institute of Sciences and Engineering, University of Sharjah, P. O. Box 27272, Sharjah, United Arab Emirates; Department of Applied Physics and Astronomy, University of Sharjah, P. O. Box 27272, Sharjah, United Arab Emirates.
| | - Abdel-Nasser Kawde
- Pure and Applied Chemistry Group, Department of Chemistry, College of Sciences, University of Sharjah, P. O. Box 27272, United Arab Emirates
| | - Krithikadevi Ramachandran
- Center for Advanced Materials Research, Research Institute of Sciences and Engineering, University of Sharjah, P. O. Box 27272, Sharjah, United Arab Emirates
| | - Mounir Gaidi
- Center for Advanced Materials Research, Research Institute of Sciences and Engineering, University of Sharjah, P. O. Box 27272, Sharjah, United Arab Emirates; Department of Applied Physics and Astronomy, University of Sharjah, P. O. Box 27272, Sharjah, United Arab Emirates
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22
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Baamer DF, Abd El Maksod IH. Surface Modification of Zinc Ferrite with Titanium to Be a Photo-Active Catalyst in Commercial LED Light. Catalysts 2023; 13:1082. [DOI: 10.3390/catal13071082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/02/2023] Open
Abstract
Titanium-doped zinc ferrite was used as a photo catalyst for breaking down C-C and C-H bonds of methylene blue dye as a model for the decomposition of organic pollutants. Different concentrations of Ti were used to impede into the spinel structure of zinc ferrite by in situ addition during the preparation. Different characterization techniques were used to characterize the prepared materials including the deep analysis of the electronic spectra, which proved the surface modification of ferrite due to the Ti doping. In addition, we make a comparison study of photo degradation using ordinary UV irradiation and commercial LED light irradiation, which gives very promising results. A correlation between the structure and the photo catalytic behavior of the materials is assigned.
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Affiliation(s)
- Doaa F. Baamer
- Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah P.O. Box 42805, Saudi Arabia
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23
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Pessanha EC, Menezes FA, Guimarães AO, Jardim PM, Marinkovic BA. Cu2O nanocubes/TiO2 heterostructure and its adsorption and photocatalytic properties for tetracycline removal. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2023.114652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2023]
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24
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Mohammadi Nezhad A, Talaiekhozani A, Mojiri A, Sonne C, Cho J, Rezania S, Vasseghian Y. Photocatalytic removal of ceftriaxone from wastewater using TiO 2/MgO under ultraviolet radiation. ENVIRONMENTAL RESEARCH 2023; 229:115915. [PMID: 37076030 DOI: 10.1016/j.envres.2023.115915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 03/30/2023] [Accepted: 04/13/2023] [Indexed: 05/03/2023]
Abstract
Pharmaceutical compounds are among the environmental contaminants that cause pollution of water resources and thereby threaten ecosystem services and the environmental health of the past decades. Antibiotics are categorized as emerging pollutants due to their persistence in the environment that are difficult to remove by conventional wastewater treatment. Ceftriaxone is one of the multiple antibiotics whose removal from wastewater has not been fully investigated. In this study, TiO2/MgO (5% MgO) the efficiency of photocatalyst nanoparticles in removing ceftriaxone was analyzed by XRD, FTIR, UV-Vis, BET, EDS, and FESEM. The results were compared with UVC, TiO2/UVC, and H2O2/UVC photolysis processes to evaluate the effectiveness of the selected methods. Based on these results, the highest removal efficiency of ceftriaxone from synthetic wastewater was 93.7% at the concentration of 400 mg/L using TiO2/MgO nano photocatalyst with an HRT of 120 min. This study confirmed that TiO2/MgO photocatalyst nanoparticles efficiently removed ceftriaxone from wastewater. Future studies should focus on the optimization of reactor conditions and improvements of the reactor design to obtain higher removal of ceftriaxone from wastewater.
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Affiliation(s)
| | - Amirreza Talaiekhozani
- Department of Chemical Engineering, Jami Institute of Technology, Isfahan, Iran; Alavi Educational and Cultural Complex, Shiraz, Iran
| | - Amin Mojiri
- Department of Civil and Environmental Engineering, Graduate School of Advanced Science and Technology, Higashihiroshima, 739-8725, Japan
| | - Christian Sonne
- Department of Ecoscience, Arctic Research Centre (ARC), Aarhus University, Frederiksborgvej 399, PO Box 358, DK-4000, Roskilde, Denmark; Sustainability Cluster, School of Engineering, University of Petroleum & Energy Studies, Dehradun, Uttarakhand 248007, India
| | - Jinwoo Cho
- Department of Environment and Energy, Sejong University, Seoul, 05006, South Korea
| | - Shahabaldin Rezania
- Department of Environment and Energy, Sejong University, Seoul, 05006, South Korea.
| | - Yasser Vasseghian
- Department of Chemistry, Soongsil University, Seoul, 06978, South Korea; School of Engineering, Lebanese American University, Byblos, Lebanon; Department of Chemical Engineering and Material Science, Yuan Ze University, Taiwan.
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25
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Mîndroiu VM, Stoian AB, Irodia R, Trușcă R, Vasile E. Titanium Dioxide Thin Films Produced on FTO Substrate Using the Sol-Gel Process: The Effect of the Dispersant on Optical, Surface and Electrochemical Features. MATERIALS (BASEL, SWITZERLAND) 2023; 16:3147. [PMID: 37109983 PMCID: PMC10144818 DOI: 10.3390/ma16083147] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/26/2023] [Revised: 04/12/2023] [Accepted: 04/14/2023] [Indexed: 06/19/2023]
Abstract
In this study, TiO2 thin films formed by dip-coating on an FTO substrate were obtained and characterized using surface, optical and electrochemical techniques. The impact of the dispersant (polyethylene glycol-PEG) on the surface (morphology, wettability, surface energy), optical (band gap and Urbach energy) and electrochemical (charge-transfer resistance, flat band potential) properties were investigated. When PEG was added to the sol-gel solution, the optical gap energy of the resultant films was reduced from 3.25 to 3.12 eV, and the Urbach energy increased from 646 to 709 meV. The dispersant addition in the sol-gel process influences surface features, as evidenced by lower contact-angle values and higher surface energy achieved for a compact film with a homogenous nanoparticle structure and larger crystallinity size. Electrochemical measurements (cycle voltammetry, electrochemical impedance spectroscopy and the Mott-Schottky technique) revealed improved catalytic properties of the TiO2 film, due to a higher insertion/extraction rate of protons into the TiO2 nanostructure, as well as a decrease in charge-transfer resistance from 418 k to 23.4 k and a decrease in flat band potential from 0.055 eV to -0.019 eV. The obtained TiO2 films are a promising alternative for technological applications, due to their advantageous surface, optical and electrochemical features.
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26
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Valadez-Renteria E, Perez-Gonzalez R, Gomez-Solis C, Diaz-Torres LA, Encinas A, Oliva J, Rodriguez-Gonzalez V. A novel and stretchable carbon-nanotube/Ni@TiO 2:W photocatalytic composite for the complete removal of diclofenac drug from the drinking water. J Environ Sci (China) 2023; 126:575-589. [PMID: 36503783 DOI: 10.1016/j.jes.2022.05.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 05/17/2022] [Accepted: 05/20/2022] [Indexed: 06/17/2023]
Abstract
We present the structural, morphological and photocatalytic properties of stretchable composites made with carbon nanotubes (CNTs), silicon rubber and Ni@TiO2:W nanoparticles (TiWNi NPs) with average size of 37 ± 2 nm. Microscopy images showed that the TiWNi NPs decorated the surface of the CNT fibers, which are oriented in a preferential direction. TiWNi NPs presented a mixture of anatase/rutile phases with cubic structure. The performance of the TiWNi powders and stretchable composites was evaluated for the photocatalytic degradation of diclofenac (DCF) anti-inflammatory drug under ultraviolet-visible light. The results revealed that the maximum DCF degradation percentages were 34.6%, 91.9%, 97.1%, 98.5% and 100% for the CNT composite (stretched at 0%), TiWNi powders, CNT + TiWNi (stretched at 0%), CNT + TiWNi (stretched at 50%) and CNT + TiWNi (stretched at 100%), respectively. Thus, stretching the CNT + TiWNi composites was a good strategy to enhance the DCF degradation percentage from 97.1% to 100%, since stretching created additional defects (oxygen vacancies) that acted as electron sink, delaying the electron-hole recombination, and favors the DCF degradation. Raman/absorbance measurements confirmed the presence of such defects. Moreover, the reactive oxygen species (ROS) were determined by the scavenger's experiments and found that the main ROS were the ·OH and O2- radicals, which attacked the DCF molecules, causing their degradation. The results of this investigation confirmed that the stretchable CNT/TiWNi-based composites are a viable alternative to remove pharmaceutical contaminants from water and can be manually separated from the decontaminated water, which is unviable using photocatalytic powders.
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Affiliation(s)
- Ernesto Valadez-Renteria
- Consejo Nacional de Ciencia y Tecnología-División de Materiales Avanzados, Instituto Potosino de Investigación Científica y Tecnológica, San Luis Potosí 78216, México
| | - Rafael Perez-Gonzalez
- Consejo Nacional de Ciencia y Tecnología-División de Materiales Avanzados, Instituto Potosino de Investigación Científica y Tecnológica, San Luis Potosí 78216, México
| | | | - Luis Armando Diaz-Torres
- Grupo de Espectroscopia de Materiales Avanzados y Nanoestructurados (GEMANA), Centro de Investigaciones en Óptica, A.C., Lomas Del Campestre, León 37150, México
| | - Armando Encinas
- Consejo Nacional de Ciencia y Tecnología-División de Materiales Avanzados, Instituto Potosino de Investigación Científica y Tecnológica, San Luis Potosí 78216, México
| | - Jorge Oliva
- Consejo Nacional de Ciencia y Tecnología-División de Materiales Avanzados, Instituto Potosino de Investigación Científica y Tecnológica, San Luis Potosí 78216, México.
| | - Vicente Rodriguez-Gonzalez
- Consejo Nacional de Ciencia y Tecnología-División de Materiales Avanzados, Instituto Potosino de Investigación Científica y Tecnológica, San Luis Potosí 78216, México.
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27
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UPR/Titanium dioxide nanocomposite: Preparation, characterization and application in photon/neutron shielding. Appl Radiat Isot 2023; 194:110688. [PMID: 36706516 DOI: 10.1016/j.apradiso.2023.110688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Revised: 12/28/2022] [Accepted: 01/20/2023] [Indexed: 01/22/2023]
Abstract
The aim of present investigation is to fabricate TiO2 reinforced novel composites as an alternate nuclear radiation shields. Unsaturated polyester resin has been reinforced by the incorporation of different weight proportions of titanium dioxide (5, 10, 15 and 20 wt%) nanoparticles. Accordingly, mass and linear attenuation coefficients (μm & μ), half and tenth value layers (HVL & TVL), relaxation length (λ) and effective atomic numbers (Zeff) have been computed. Gamma ray transmission set up has been employed for the determination of experimental μm values and consistency of experimental outcomes has been compared with the induced results from WinXCom program and Geant4 simulation code. Moreover, discrepancy of fast neutron removal cross section with the increasing TiO2 content in the prepared composites has been studied. Additionally, structural properties in terms of XRD, SEM, RAMAN, FTIR and mechanical properties in terms of compressive strength have been analysed. The findings of this study revealed that the addition of TiO2 nanoparticles improved the mechanical, nuclear shielding and structural properties of composites. The best gamma ray shielding competency has been showed by the highest TiO2 addition (20%) composite. All in all, UPR + TiO2 composites have been identified as promising alternative radiation shielding candidates owning to their cost effectiveness, ease of processing, good dispersion and lightweightness.
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28
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Fajardo-Puerto E, Elmouwahidi A, Bailón-García E, Pérez-Cadenas AF, Carrasco-Marín F. From Fenton and ORR 2e−-Type Catalysts to Bifunctional Electrodes for Environmental Remediation Using the Electro-Fenton Process. Catalysts 2023. [DOI: 10.3390/catal13040674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023] Open
Abstract
Currently, the presence of emerging contaminants in water sources has raised concerns worldwide due to low rates of mineralization, and in some cases, zero levels of degradation through conventional treatment methods. For these reasons, researchers in the field are focused on the use of advanced oxidation processes (AOPs) as a powerful tool for the degradation of persistent pollutants. These AOPs are based mainly on the in-situ production of hydroxyl radicals (OH•) generated from an oxidizing agent (H2O2 or O2) in the presence of a catalyst. Among the most studied AOPs, the Fenton reaction stands out due to its operational simplicity and good levels of degradation for a wide range of emerging contaminants. However, it has some limitations such as the storage and handling of H2O2. Therefore, the use of the electro-Fenton (EF) process has been proposed in which H2O2 is generated in situ by the action of the oxygen reduction reaction (ORR). However, it is important to mention that the ORR is given by two routes, by two or four electrons, which results in the products of H2O2 and H2O, respectively. For this reason, current efforts seek to increase the selectivity of ORR catalysts toward the 2e− route and thus improve the performance of the EF process. This work reviews catalysts for the Fenton reaction, ORR 2e− catalysts, and presents a short review of some proposed catalysts with bifunctional activity for ORR 2e− and Fenton processes. Finally, the most important factors for electro-Fenton dual catalysts to obtain high catalytic activity in both Fenton and ORR 2e− processes are summarized.
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29
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Yerli Soylu N, Soylu A, Dikmetas DN, Karbancioglu-Guler F, Kucukbayrak S, Erol Taygun M. Photocatalytic and Antimicrobial Properties of Electrospun TiO 2-SiO 2-Al 2O 3-ZrO 2-CaO-CeO 2 Ceramic Membranes. ACS OMEGA 2023; 8:10836-10850. [PMID: 37008115 PMCID: PMC10061526 DOI: 10.1021/acsomega.2c06986] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Accepted: 03/07/2023] [Indexed: 06/12/2023]
Abstract
In this study, TiO2-based ceramic nanofiber membranes in the system of TiO2-SiO2-Al2O3-ZrO2-CaO-CeO2 were synthesized by combining sol-gel and electrospinning processes. In order to investigate the thermal treatment temperature effect, the obtained nanofiber membranes were calcined at different temperatures ranging from 550 to 850 °C. Different characterization methods such as X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared (FT-IR), and high-resolution transmission electron microscopy (HR-TEM) were conducted on the obtained membranes to investigate the structural and morphological properties of the nanofibers. The Brunauer-Emmett-Teller surface area of the nanofiber membranes was very high (46.6-149.2 m2/g) and decreased with increasing calcination temperature as expected. Photocatalytic activity investigations were determined using methylene blue (MB) as a model dye under UV and sunlight irradiation. High degradation performances were achieved with the calcination temperatures of 650 and 750 °C because of the high specific surface area and the anatase structure of the nanofiber membranes. Moreover, the ceramic membranes showed antibacterial activity against Escherichia coli as a Gram-negative bacterium and Staphylococcus aureus as a Gram-positive bacterium. The superior properties of the novel TiO2-based multi-oxide nanofiber membranes proved as a promising candidate for various industries, especially the removal of textile dyes from wastewater.
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Affiliation(s)
- Nuray Yerli Soylu
- Faculty
of Chemical and Metallurgical Engineering, Department of Chemical
Engineering, Istanbul Technical University, Maslak, Istanbul 34449, Turkey
- Faculty
of Engineering, Department of Chemical Engineering, Marmara University, Maltepe, Istanbul 34854, Turkey
| | - Anıl Soylu
- Faculty
of Mines, Department of Mining Engineering, Istanbul Technical University, Maslak, Istanbul 34449, Turkey
| | - Dilara Nur Dikmetas
- Faculty
of Chemical and Metallurgical Engineering, Department of Food Engineering, Istanbul Technical University, Maslak, Istanbul 34449, Turkey
| | - Funda Karbancioglu-Guler
- Faculty
of Chemical and Metallurgical Engineering, Department of Food Engineering, Istanbul Technical University, Maslak, Istanbul 34449, Turkey
| | - Sadriye Kucukbayrak
- Faculty
of Chemical and Metallurgical Engineering, Department of Chemical
Engineering, Istanbul Technical University, Maslak, Istanbul 34449, Turkey
| | - Melek Erol Taygun
- Faculty
of Chemical and Metallurgical Engineering, Department of Chemical
Engineering, Istanbul Technical University, Maslak, Istanbul 34449, Turkey
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30
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Kaikhosravi M, Hadadzadeh H, Farrokhpour H, Salimi A, Mohtasham H, Foelske A, Sauer M. A combined experimental and theoretical study of RuO 2/TiO 2 heterostructures as a photoelectrocatalyst for hydrogen evolution. Dalton Trans 2023; 52:3472-3481. [PMID: 36843449 DOI: 10.1039/d2dt04123e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
We report a joint experimental and theoretical study of RuO2/TiO2 heterostructures. In the experimental section, mesoporous RuO2/TiO2 heterostructures were prepared by impregnation of mesoporous TiO2 nanoparticles which were synthesized from a new precursor, Na2[Ti(C2O4)3], in an aqueous solution of ruthenium(III) chloride followed by calcination at 300 °C. Using various techniques, the prepared TiO2 and RuO2/TiO2 heterostructures were extensively characterized. The photoelectocatalytic application of the as-prepared heterostructures was then investigated toward the hydrogen evolution reaction (HER). The results illustrated that RuO2 is dispersed uniformly on the TiO2 surface. The loading of RuO2 on TiO2 decreases the band gap energy and extends the absorption edge to the visible light region. This wide absorption extends the photoelectrocatalytic activity of RuO2/TiO2 heterostructures. To obtain a deeper understanding of the increase of the photoelectrocatalytic activity of RuO2/TiO2 heterostructures compared to pure TiO2, theoretical calculations at the density functional theory (DFT) level were performed on some model clusters of pure TiO2 and the RuO2/TiO2 heterostructure. The theoretical results elucidated that the recombination ratio of electron-hole pairs decreases effectively for RuO2/TiO2 compared to pure TiO2.
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Affiliation(s)
- Mohammad Kaikhosravi
- Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Iran.
| | - Hassan Hadadzadeh
- Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Iran.
| | - Hossein Farrokhpour
- Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Iran.
| | - Abdollah Salimi
- Department of Chemistry, University of Kurdistan, Sanandaj 66177-15175, Iran
| | - Hamed Mohtasham
- Department of Chemistry, University of Kurdistan, Sanandaj 66177-15175, Iran
| | - Annette Foelske
- Analytical Instrumentation Center, TU Wien, Lehargasse 6, 1060 Vienna, Austria
| | - Markus Sauer
- Analytical Instrumentation Center, TU Wien, Lehargasse 6, 1060 Vienna, Austria
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31
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Asadzadeh N, Ahmadlouydarab M, Haddad AS. Effects of temperature and nanofluid type on the oil recovery from a vertical porous media in antigravity fluid injection. Chem Eng Res Des 2023. [DOI: 10.1016/j.cherd.2023.03.046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/31/2023]
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32
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Photocatalytic-driven three-component synthesis of 1,2,3,4-tetrahydropyrimidine-5-carbonitrile derivatives: A comparative study of organocatalysts and photocatalysts. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2022.114358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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33
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Enhancing the Photocatalytic Activity of TiO2 for the Degradation of Congo Red Dye by Adjusting the Ultrasonication Regime Applied in Its Synthesis Procedure. Catalysts 2023. [DOI: 10.3390/catal13020345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Recently, the ultrasound-assisted sol-gel synthesis procedure of mesoporous titania (TiO2) photocatalysts caught the researcher’s attention, due to the physicochemical properties enhancement of the resulting titania nanomaterials. Thus, by varying different synthesis parameters particular characteristics could be obtained. In the present study, the ultrasound pulse on/off ratio has been considered and the effect of the envisaged parameter on the textural, morphological, and optical features of titania nanomaterial has been investigated. Therefore, X-ray Diffraction (XRD), Fourier-Transform Infrared spectroscopy (FTIR), N2-sorption measurements, SEM imaging, and UV-Vis Diffuse Reflectance spectroscopy (UVDR) have been used. And further, the photocatalytic activity of the prepared TiO2 materials was evaluated by the features developed about the applied ultrasound pulse on/off ratio as 1/1, 2/1, 3/1, 4/1, 1/3 and 2/2. It was found that the ultrasound pulse on/off ratio considered in the synthesis procedure of titania leads to TiO2 materials with different textural (SBET = 98–156 m2/g), morphological, and optical (Eg = 3.1–3.2 eV) characteristics. For this reason, TiO2 nanomaterials prepared were found to exhibit suitable features for photocatalytic applications. Thus, the TiO2 4.1 sample prepared at 4/1 ultrasound pulse on/off ratio revealed the highest photodegradation efficiency of Congo Red dye (98.28%) as the results of photocatalytic tests show. More than that, a possible reaction mechanism of the CR photodegradation process through the contribution of reactive oxygen species (·HO, ·O2−), holes (h+), and electrons (e−) of developed titania photocatalyst was proposed.
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Inamdar AK, Hulsure NR, Kadam AS, Rajenimbalkar RS, Karpoormath R, Shelke SB, Inamdar SN. Flame Synthesized Tetragonal TiO2 Nanoparticles for Methylene blue and Congo Red Dye Removal applications. RESULTS IN CHEMISTRY 2023. [DOI: 10.1016/j.rechem.2023.100854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/27/2023] Open
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Ma X, Zhu H, Yu L, Li X, Ye E, Li Z, Loh XJ, Wang S. Rare-earth-doped indium oxide nanosphere-based gas sensor for highly sensitive formaldehyde detection at a low temperature. NANOSCALE 2023; 15:1609-1618. [PMID: 36602001 DOI: 10.1039/d2nr04972d] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Formaldehyde (HCHO) is widely viewed as a carcinogenic volatile organic compound in indoor air pollution that can seriously threaten human health and life. Thus, there is a critical need to develop gas sensors with improved sensing performance, including outstanding selectivity, low operating temperature, high responsiveness, and short recovery time, for HCHO detection. Currently, doping is considered an effective strategy to raise the sensing performance of gas sensors. Herein, various rare earth elements-doped indium oxide (RE-In2O3) nanospheres were fabricated as gas sensors for improved HCHO detection via a facile and environmentally solvothermal method. Such RE-In2O3 nanosphere-based sensors exhibited remarkable gas-sensing performance, including a high selectivity and stability in air. Compared with pure, Yb-, Dy-doped In2O3 and different La ratios doped into In2O3, 6% La-doped In2O3 (La-In2O3) nanosphere-based sensors demonstrated a high response value of 210 to 100 ppm at 170 °C, which was around 16 times higher than that of the pure In2O3 sensor, and also exhibited a detection limit of 10.9 ppb, and a response time of 30 s to 100 ppm HCHO with a recovery time of 160 s. Finally, such superior sensing performance of the 6% La-In2O3 sensors was proposed to be attributed to the synergistic effect of the large specific surface area and enhanced surface oxygen vacancies on the surface of In2O3 nanospheres, which produced chemisorbed oxygen species to release electrons and provided abundant reaction sites for HCHO gas. This study sheds new light on designing nanomaterials to build gas sensors for HCHO detection.
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Affiliation(s)
- Xiangyun Ma
- Guangdong Provincial Key Laboratory of Petrochemical Pollution Process and Control, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, Guangdong 525000, China
| | - Houjuan Zhu
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), Singapore 138634
| | - Long Yu
- Guangdong Provincial Key Laboratory of Petrochemical Pollution Process and Control, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, Guangdong 525000, China
| | - Xin Li
- Guangdong Provincial Key Laboratory of Petrochemical Pollution Process and Control, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, Guangdong 525000, China
| | - Enyi Ye
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), Singapore 138634
- Institute of Sustainability for Chemicals, Energy and Environment (ISCE2) A*STAR (Agency for Science, Technology and Research), Singapore 138634
| | - Zibiao Li
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), Singapore 138634
- Institute of Sustainability for Chemicals, Energy and Environment (ISCE2) A*STAR (Agency for Science, Technology and Research), Singapore 138634
| | - Xian Jun Loh
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), Singapore 138634
| | - Suhua Wang
- Guangdong Provincial Key Laboratory of Petrochemical Pollution Process and Control, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, Guangdong 525000, China
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Bakhodaye Dehghanpour S, Parvizian F, Vatanpour V, Razavi M. PVA/TS-1 composite embedded thin-film nanocomposite reverse osmosis membrane with enhanced desalination performance and fouling resistance. CHEM ENG COMMUN 2022. [DOI: 10.1080/00986445.2022.2156342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
| | - Fahimeh Parvizian
- Department of Chemical Engineering, Faculty of Engineering, Arak University, Arak, Iran
| | - Vahid Vatanpour
- Department of Applied Chemistry, Faculty of Chemistry, Kharazmi University, Tehran, Iran
- National Research Center on Membrane Technologies, Istanbul Technical University Maslak, Istanbul, Turkey
| | - Mansour Razavi
- Department of Ceramic, Materials and Energy Research Center, Karaj, Iran
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Guastaferro M, Baldino L, Vaiano V, Cardea S, Reverchon E. Supercritical Phase Inversion to Produce Photocatalytic Active PVDF-coHFP_TiO 2 Composites for the Degradation of Sudan Blue II Dye. MATERIALS (BASEL, SWITZERLAND) 2022; 15:8894. [PMID: 36556698 PMCID: PMC9782530 DOI: 10.3390/ma15248894] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 12/08/2022] [Accepted: 12/09/2022] [Indexed: 06/17/2023]
Abstract
TiO2-loaded poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-coHFP) membranes were produced by supercritical CO2-assisted phase inversion. Three different TiO2 loadings were tested: 10, 20, and 30 wt% with respect to the polymer. Increasing the TiO2 amount from 10 wt% to 20 wt% in the starting solution, the transition from leafy-like to leafy-cellular morphology was observed in the section of the membrane. When 30 wt% TiO2 was used, the entire membrane section showed agglomerates of TiO2 nanoparticles. These polymeric membranes were tested to remove Sudan Blue II (SB) dye from aqueous solutions. The adsorption/photocatalytic processes revealed that membrane morphology and TiO2 cluster size were the parameters that mainly affected the dye removal efficiency. Moreover, after five cycles of exposure of these membranes to UV light, SB removal was higher than 85%.
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Affiliation(s)
- Mariangela Guastaferro
- Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II, 132, Fisciano, 84084 Salerno, Italy
| | - Lucia Baldino
- Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II, 132, Fisciano, 84084 Salerno, Italy
- C.U.G.RI., InterUniversity Research Center for the Prediction and Prevention of Major Hazards, University of Salerno, Via Giovanni Paolo II, 132, Fisciano, 84084 Salerno, Italy
| | - Vincenzo Vaiano
- Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II, 132, Fisciano, 84084 Salerno, Italy
| | - Stefano Cardea
- Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II, 132, Fisciano, 84084 Salerno, Italy
| | - Ernesto Reverchon
- Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II, 132, Fisciano, 84084 Salerno, Italy
- C.U.G.RI., InterUniversity Research Center for the Prediction and Prevention of Major Hazards, University of Salerno, Via Giovanni Paolo II, 132, Fisciano, 84084 Salerno, Italy
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Ntelane TS, Feleni U, Mthombeni NH, Kuvarega AT. Sulfate radical-based advanced oxidation process (SR-AOP) on titania supported mesoporous dendritic silica (TiO2/MDS) for the degradation of carbamazepine and other water pollutants. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.130276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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39
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Simultaneous photooxidation and photoreduction of phenol and Cr(VI) ions using titania modified with nanosilica. POLISH JOURNAL OF CHEMICAL TECHNOLOGY 2022. [DOI: 10.2478/pjct-2022-0025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Abstract
The photocatalytic process of phenol oxidation and Cr(VI) reduction in the presence of nano-silica modified titania was carried out. The activity of composites was tested using two different light sources. The photocatalysts with 10% of nanosilica showed the highest activity. The calcination temperature (200–800 oC) significantly determined the sensitivity of the obtained materials to the light source used. Photocatalysts alternately adsorbed and desorbed Cr(VI) ions from the reaction mixture during irradiation. In the one-component mixture, complete oxidation of phenol was observed using material calcined at 650 oC, after 3 h of UV-VIS irradiation. In the reaction mixture of Cr(VI) and phenol, the highest activity was demonstrated by photocatalyst calcined at 300 oC. The concentration of phenol decreased in proportion to the decrease of chromium ions. The obtained titania-silica composites showed oxidizing properties towards phenol and reductive properties toward Cr(VI) ions.
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40
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Anis SF, Lalia BS, Hashaikeh R, Hilal N. Ceramic nanofiltration membranes for efficient fouling mitigation through periodic electrolysis. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.122228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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41
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Bakhodaye Dehghanpour S, Parvizian F, Vatanpour V. The role of CuO/TS-1, ZnO/TS-1, and Fe2O3/TS-1 on the desalination performance and antifouling properties of thin-film nanocomposite reverse osmosis membranes. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.122083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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42
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Swaroop R, Rani P, Jamwal G, Sabavath G, Kumar H, Jewariya Y. Enhancing the electrochemical performance of TiO 2 based material using microwave air plasma treatment with an ECR cavity. Front Chem 2022; 10:1065153. [PMID: 36505733 PMCID: PMC9729354 DOI: 10.3389/fchem.2022.1065153] [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: 10/12/2022] [Accepted: 11/14/2022] [Indexed: 11/25/2022] Open
Abstract
The microwave-based plasma treatment facility at the Central University of Punjab Bathinda (CUPB) based on 2.45 GHz has been used to investigate the impact on the electrochemical performance of TiO2. This was accomplished by treating a number of pellets of TiO2 sample material with microwave plasma at an input power of 80 W. The palette is subjected to microwave plasma treatment at 30-, 60-, 80-, and 100-s intervals. Many such characterization methods, including UV-visible spectroscopy, FTIR, XRD, and FESEM, have been applied to the study of the impact of plasma treatment on other physical and chemical properties in the context of untreated pellets. In the 80-s plasma treatment, the FTIR study showed that the (O-Ti-O) vibration band at 500-900 cm-1 was wider than other bands. The UV results showed that an 80-s plasma treatment decreased the sample's band gap by 37% and increased the amount of disordered, amorphous material in the sample that had not been treated. XRD studies show that a sample that was treated with plasma for 80 s has low crystallinity and a high disorder (amorphous) factor. The Nyquist plot showed that the electrochemical charge transfer resistance drops from 7 (not treated) to 4 after 80 s of plasma treatment. In a study of electrochemical performance, a sample that was treated with plasma for 80 s has a capacitance that is 35% higher than a sample that was not treated.
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Affiliation(s)
- Ram Swaroop
- Department of Physics, Central University of Punjab, Bathinda, India,*Correspondence: Ram Swaroop,
| | - Pinki Rani
- Department of Physics, Central University of Punjab, Bathinda, India
| | - Gaurav Jamwal
- Department of Physics Jamia Millia Islamia, New Delhi, India
| | - Gopikishan Sabavath
- Department of Physics Kandlakoya Medchal, CMR Engineering College, Hyderabad, India
| | - Haldhar Kumar
- Department of Geology, Central University of Punjab, Bathinda, India
| | - Yogesh Jewariya
- Department of Physics, Central University of Punjab, Bathinda, India
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Ferrara V, Marchetti M, Alfieri D, Targetti L, Scopelliti M, Pignataro B, Pavone F, Vetri V, Sancataldo G. Blue Light Activated Photodegradation of Biomacromolecules by N-doped Titanium Dioxide in a Chitosan Hydrogel Matrix. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.114451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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44
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Norouzi M, Fazeli A, Tavakoli O. Photocatalytic degradation of phenol under visible light using electrospun Ag/TiO2 as a 2D nano-powder: Optimizing calcination temperature and promoter content. ADV POWDER TECHNOL 2022. [DOI: 10.1016/j.apt.2022.103792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
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45
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Visible light degradation of ibuprofen using PANI coated WO3@TiO2 photocatalyst. JOURNAL OF SAUDI CHEMICAL SOCIETY 2022. [DOI: 10.1016/j.jscs.2022.101563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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46
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The Combined Effect of Bubble and Photo Catalysis Technology in BTEX Removal from Produced Water. BULLETIN OF CHEMICAL REACTION ENGINEERING & CATALYSIS 2022. [DOI: 10.9767/bcrec.17.3.15367.577-589] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Among the several ways used in wastewater treatment, the photocatalysis process is a more novel and alternative process that is increasingly employed in recent years. This work aims to improve the performance of the photocatalyst process by using air bubbles in removing the BTEX from produced water as an indicator of process efficiency. The study also shows the effect of influencing factors (pH and residence time) on the photocatalysis process. The study was done in a rectangular column with dimensions of 200 mm width, 30 mm depth, and 1500 mm height. Commercial titanium oxide (TiO2) coated on a plate by the varnish was used as a source of the photocatalyst. The experiment was carried out under different values of gas flow rate (0-3 L/min) to evaluate its effect on the photocatalyst process, the effect of other variables of pH (3-11), and irradiation time (30-120) min was also studied. A new method of the coating was adopted by using an alumina plate with varnish as an adhesive. The characteristics results show that the coated plate has hydrophilic properties and that there is no significant change in the crystal structure of the TiO2 nanoparticles and the varnish before and after 60 h of the photocatalytic process, indicating that the plate is still effective after 60 h usage under different conditions. The results also show that the introduction of air bubbles enhances the removal efficiency of BTEX significantly and the best removal effectiveness of BTEX was 93% when pH = 5 after 90 min and 90% when pH = 3 after 120 min. The removal rate also reached 86% when pH = 7 after 120 min all at a flow rate of 3 L/min. The percentage of removal decreased at pH = 9 and 11, reaching 64% and 50%, respectively after 120 min and a flow rate of 3 L/min. Copyright © 2022 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
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Alvarez-Amparán MA, Martínez-Cornejo V, Cedeño-Caero L, Hernandez-Hernandez KA, Cadena-Nava RD, Alonso-Núñez G, Moyado SF. Characterization and photocatalytic activity of TiO2 nanoparticles on cotton fabrics, for antibacterial masks. APPLIED NANOSCIENCE 2022; 12:4019-4032. [PMID: 36124253 PMCID: PMC9476449 DOI: 10.1007/s13204-022-02634-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Accepted: 08/30/2022] [Indexed: 11/17/2022]
Abstract
The in-situ impregnation of two commercial cotton fabrics (lab coat and Indiolino) with TiO2 nanoparticles (TiO2-NPs) was carried out. For this, two commercial cotton fabrics were dipped in titanium isopropoxide, titanium butoxide and titanium tetrachloride solutions to the TiO2-NPs formation and in-situ TiO2-NPs impregnation on the cotton fabric surface by the sonochemical, hydrothermal and solvothermal methods, respectively. The impregnated fabrics were characterized by ATR-FTIR, SEM–EDS, Raman, UV–Vis, DRS and tension tests. The results showed the successful formation and impregnation of TiO2-NPs on both cotton fabrics. The leaching of TiO2-NPs from cotton fabrics was negligible after several washing cycles. The self-cleaning properties and antibacterial activity of TiO2-NPs functionalized cotton fabrics were assessed by photocatalytic and antibacterial tests. The photocatalytic activity was determined by the degradation of methylene blue dye under UV and solar irradiation. The materials showed good photoactivity, since MB was degraded up to 99% under solar and UV irradiations in 60 min. The bactericidal capacity of the TiO2-NPs on fabrics, evaluated in-situ by SEM, showed that Indiolino presented the best antibacterial properties against Escherichia coli and Bacillus pumilus.
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Razavi FS, Ghanbari D, Salavati-Niasari M. Comparative Study on the Role of Noble Metal Nanoparticles (Pt and Pd) on the Photocatalytic Performance of the BaFe 12O 19/TiO 2 Magnetic Nanocomposite: Green Synthesis, Characterization, and Removal of Organic Dyes under Visible Light. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c01066] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Fatemeh Sadat Razavi
- Institute of Nanoscience and Nanotechnology, University of Kashan, Kashan 87317-51167, Islamic Republic of Iran
| | - Davood Ghanbari
- Department of Science, Arak University of Technology, Arak 38135-1177, Iran
| | - Masoud Salavati-Niasari
- Institute of Nanoscience and Nanotechnology, University of Kashan, Kashan 87317-51167, Islamic Republic of Iran
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Ikram M, Ul Haq MA, Haider A, Haider J, Ul-Hamid A, Shahzadi I, Bari MA, Ali S, Goumri-Said S, Kanoun MB. The enhanced photocatalytic performance and first-principles computational insights of Ba doping-dependent TiO 2 quantum dots. NANOSCALE ADVANCES 2022; 4:3996-4008. [PMID: 36133333 PMCID: PMC9470062 DOI: 10.1039/d2na00361a] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Accepted: 08/16/2022] [Indexed: 05/14/2023]
Abstract
Degradation in the presence of visible light is essential for successfully removing dyes from industrial wastewater, which is pivotal for environmental and ecological safety. In recent years, photocatalysis has emerged as a prominent technology for wastewater treatment. This study aimed to improve the photocatalytic efficiency of synthesized TiO2 quantum dots (QDs) under visible light by barium (Ba) doping. For this, different weight ratios (2% and 4%) of Ba-doped TiO2 QDs were synthesized under ambient conditions via a simple and modified chemical co-precipitation approach. The QD crystal structure, functional groups, optical features, charge-carrier recombination, morphological properties, interlayer spacing, and presence of dopants were analyzed. The results showed that for 4% Ba-doped TiO2, the effective photocatalytic activity in the degradation process of methylene blue (MB) dye was 99.5% in an alkaline medium. Density functional theory analysis further corroborated that the band gap energy was reduced when Ba was doped into the TiO2 lattice, implying a considerable redshift of the absorption edge due to in-gap states near the valence band.
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Affiliation(s)
- Muhammad Ikram
- Solar Cell Applications Research Lab, Department of Physics, Government College University Lahore Lahore 54000 Punjab Pakistan
| | - Muhammad Ahsan Ul Haq
- Department of Physics, Riphah Institute of Computing and Applied Sciences (RICAS), Riphah International University 14 Ali Road Lahore Pakistan
| | - Ali Haider
- Department of Clinical Medicine and Surgery, University of Veterinary and Animal Sciences Lahore 54000 Punjab Pakistan
| | - Junaid Haider
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences Tianjin 300308 China
| | - Anwar Ul-Hamid
- Center for Engineering Research, Research Institute, King Fahd University of Petroleum & Minerals Dhahran 31261 Saudi Arabia
| | - Iram Shahzadi
- Punjab University College of Pharmacy, University of the Punjab 54000 Pakistan
| | - Muhammad Ahsaan Bari
- Solar Cell Applications Research Lab, Department of Physics, Government College University Lahore Lahore 54000 Punjab Pakistan
| | - Salamat Ali
- Department of Physics, Riphah Institute of Computing and Applied Sciences (RICAS), Riphah International University 14 Ali Road Lahore Pakistan
| | - Souraya Goumri-Said
- College of Science, Physics Department, Alfaisal University P. O. Box 50927 Riyadh 11533 Saudi Arabia
| | - Mohammed Benali Kanoun
- Department of Physics, College of Science, King Faisal University P. O. Box 400 Al-Ahsa 31982 Saudi Arabia
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50
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Scannavino RCP, Riccucci G, Ferraris S, Duarte GLC, de Oliveira PT, Spriano S. Functionalization with Polyphenols of a Nano-Textured Ti Surface through a High-Amino Acid Medium: A Chemical-Physical and Biological Characterization. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:2916. [PMID: 36079954 PMCID: PMC9458157 DOI: 10.3390/nano12172916] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 08/20/2022] [Accepted: 08/22/2022] [Indexed: 06/15/2023]
Abstract
The study aimed to identify an effective mechanism of adsorption of polyphenols on a nano-textured Ti surface and to evaluate the osteogenic differentiation on it. The source of polyphenols was a natural extract from red grape pomace. A chemical etching was used to form an oxide layer with a nanoscale texture on Ti; this layer is hydrophilic, but without hydroxyl groups with high acidic-basic chemical reactivity. The samples were characterized by electron and fluorescence microscopies, UV-Vis spectroscopy, contact angle measurements, zeta potential titration curves, and Folin-Ciocâlteu test. The presence of an adsorbed layer of polyphenols on the functionalized surface, maintaining redox ability, was confirmed by several tests. Consistent with the surface features, the adsorption was maximized by dissolving the extract in a high-amino acid medium, with respect to an inorganic solution, exploiting the high affinity of amino acids for polyphenols and for porous titanium surfaces. The osteogenic differentiation was assessed on an osteoblastic cell line by immunofluorescence, cell viability, expression of key osteoblast markers, and extracellular matrix mineralization. The surfaces functionalized with the extract diluted in the range 1 × 10-5-1 mg/mL resulted in having a greater osteogenic activity for the highest concentration, with lower values of cell viability; higher expression of alkaline phosphatase, bone sialoprotein, and collagen; and lower levels of osteopontin. In conclusion, the functionalization of a nano-textured Ti surface with polyphenols can potentially favor the osteogenic activity of osseointegrated implants.
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Affiliation(s)
- Rafaella C. P. Scannavino
- School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto 14040-904, SP, Brazil
| | - Giacomo Riccucci
- Department of Applied Science and Technology, Politecnico di Torino, 10126 Torino, Italy
| | - Sara Ferraris
- Department of Applied Science and Technology, Politecnico di Torino, 10126 Torino, Italy
| | - Gabriel L. C. Duarte
- School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto 14040-904, SP, Brazil
| | - Paulo T. de Oliveira
- School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto 14040-904, SP, Brazil
| | - Silvia Spriano
- Department of Applied Science and Technology, Politecnico di Torino, 10126 Torino, Italy
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