1
|
Elbasuney S, El-Khawaga AM, Elsayed MA, Elsaidy A, Yehia M, Correa-Duarte MA. Facile synthesis of silver doped manganese oxide nanocomposite with superior photocatalytic and antimicrobial activity under visible spectrum. Sci Rep 2024; 14:15658. [PMID: 38977812 PMCID: PMC11231171 DOI: 10.1038/s41598-024-65749-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2024] [Accepted: 06/24/2024] [Indexed: 07/10/2024] Open
Abstract
Water pollution and antimicrobial resistance (AMR) have become two global threats; 80% of diseases and 50% of child deaths are due to poor water quality. In this study, hydrothermal processing was employed to manufacture manganese oxide nanorods. Silver dopant was deposited on the surface of manganese oxide. XRD diffractogram confirmed the facile synthesis of Ag/Mn2O3 nanocomposite. XPS survey analysis demonstrated silver content of 9.43 atom %. Photocatalytic measurements demonstrated the outstanding efficiency of the Ag-Mn2O3 compared to virgin oxide particles under visible radiation. Degradation efficiencies Mn2O3 and Ag/Mn2O3 on methyl orange (MO) dye was found to be 53% and 85% under visible spectrum. Silver dopant was found to decrease the binding energy of valence electrons; this action could support electron-hole pair generation under visible spectrum and could promote catalytic performance. Ag/Mn2O3 NPs demonstrated most effective performance (95% removal efficiency) at pH 3; this could be ascribed to the electrostatic attraction between positively charged catalyst and the negatively charged MO. Ag/Mn2O3 demonstrated enhanced antibacterial activity against Gram-positive Staphylococcus aureus (S. aureus) (19 mm ZOI), and Gram-negative Escherichia coli (E. coli) (22 mm ZOI) respectively; the developed nanocomposite demonstrated advanced anti-film activity with inhibition percentage of 95.5% against E. coli followed by 89.5% against S. aureus.
Collapse
Affiliation(s)
- Sherif Elbasuney
- Head of Nanotechnology Research Center, Military Technical College, Cairo, Egypt.
| | - Ahmed M El-Khawaga
- Department of Basic Medical Sciences, Faculty of Medicine, Galala University, New Galala City, 43511, Suez, Egypt.
| | - Mohamed A Elsayed
- Head of School of Chemical Engineering, Military Technical College, Cairo, Egypt
| | - Amir Elsaidy
- School of Chemical Engineering, Military Technical College, Cairo, Egypt
| | - M Yehia
- Biomedical Research Center (CINBIO), and Institute of Biomedical Research of Ourense-Pontevedra-Vigo (IBI), Universidad de Vigo, 36310, Vigo, Spain
| | - Miguel A Correa-Duarte
- Biomedical Research Center (CINBIO), and Institute of Biomedical Research of Ourense-Pontevedra-Vigo (IBI), Universidad de Vigo, 36310, Vigo, Spain
| |
Collapse
|
2
|
El-Khawaga AM, Ayman M, Hafez O, Shalaby RE. Photocatalytic, antimicrobial and antibiofilm activities of MgFe 2O 4 magnetic nanoparticles. Sci Rep 2024; 14:12877. [PMID: 38834648 DOI: 10.1038/s41598-024-62868-5] [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: 02/26/2024] [Accepted: 05/22/2024] [Indexed: 06/06/2024] Open
Abstract
This study reports the antibacterial and antibiofilm activities of Magnesium ferrite nanoparticles (MgFe2O4) against gram-positive and gram-negative bacteria. The photocatalytic degradation of Carbol Fuchsin (CF) dye (a class of dyestuffs that are resistant to biodegradation) under the influence of UV-light irradiation is also studied. The crystalline magnesium ferrite (MgFe2O4) nanoparticles were synthesized using the co-precipitation method. The morphology of the resulting nanocomposite was examined using scanning electron microscopy (SEM), while transmission electron microscopy (TEM) was employed for further characterization of particle morphology and size. Fourier transform infrared (FTIR) spectroscopy and X-ray diffraction (XRD) were utilized to analyze the crystalline structure, chemical composition, and surface area, respectively. Optical properties were evaluated using UV-Vis spectroscopy. The UV-assisted photocatalytic performance of MgFe2O4 nanoparticles was assessed by studying the decolorization of Carbol fuchsin (CF) azo dye. The crystallite size of the MgFe2O4 nanoparticles at the (311) plane, the most prominent peak, was determined to be 28.5 nm. The photocatalytic degradation of 10 ppm CF using 15 mg of MgFe2O4 nanoparticles resulted in a significant 96% reduction after 135 min at ambient temperature (25 °C) and a pH value of 9. Additionally, MgFe2O4 nanoparticles exhibited potent antibacterial activity against E. coli and S. aureus in a dose dependent manner with maximum utilized concentration of 30 µg/ml. Specifically, MgFe2O4 nanoparticles demonstrated substantial antibacterial activity via disk diffusion and microbroth dilution tests with zones of inhibition and minimum inhibitory concentrations (MIC) for E. coli (26.0 mm, 1.25 µg/ml) and S. aureus (23.0 mm, 2.5 µg/ml), respectively. Moreover, 10.0 µg/ml of MgFe2O4 nanoparticles elicited marked percent reduction in biofilm formation by E. coli (89%) followed by S. aureus (78.5%) after treatment. In conclusion, MgFe2O4 nanoparticles demonstrated efficient dye removal capabilities along with significant antimicrobial and antibiofilm activity against gram-positive and gram-negative bacterial strains suggesting their potential as promising antimicrobial and detoxifying agents.
Collapse
Affiliation(s)
- Ahmed M El-Khawaga
- Department of Basic Medical Sciences, Faculty of Medicine, Galala University, New Galala City, Suez, Egypt.
| | - Mohamed Ayman
- Department of Basic Medical Sciences, Faculty of Medicine, Galala University, New Galala City, Suez, Egypt
| | - Omar Hafez
- Department of Basic Medical Sciences, Faculty of Medicine, Galala University, New Galala City, Suez, Egypt
| | - Rasha E Shalaby
- Department of Basic Medical Sciences, Faculty of Medicine, Galala University, New Galala City, Suez, Egypt.
- Department of Microbiology and Immunology, Faculty of Medicine, Tanta University, Tanta, Egypt.
| |
Collapse
|
3
|
Ali MAS, Abdel-Rahim EAM, Mahmoud AAA, Mohamed SE. Innovative textiles treated with TiO 2-AgNPs with succinic acid as a cross-linking agent for medical uses. Sci Rep 2024; 14:8045. [PMID: 38580674 PMCID: PMC10997752 DOI: 10.1038/s41598-024-56653-7] [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: 11/05/2023] [Accepted: 03/08/2024] [Indexed: 04/07/2024] Open
Abstract
Silver and titanium-silver nanoparticles have unique properties that make the textile industry progress through the high quality of textiles. Preparation of AgNPs and TiO2-Ag core-shell nanoparticles in different concentrations (0.01% and 0.1% OWF) and applying it to cotton fabrics (Giza 88 and Giza 94) by using succinic acid 5%/SHP as a cross-linking agent. Ultra-violet visible spectroscopy (UV-Vis), X-ray diffraction (XRD), dynamic light scattering (DLS), zeta potential, transmission electron microscopy (TEM), scanning electron microscopy/energy-dispersive X-ray (SEM-EDX) are tools for AgNPs and TiO2-AgNPs characterization and the treated cotton. The resulting AgNPs and TiO2-AgNPs were added to cotton fabrics at different concentrations. The antimicrobial activities, UV protection, self-cleaning, and the treated fabrics' mechanical characteristics were investigated. Silver nanoparticles and titanium dioxide-silver nanoparticles core-shell were prepared to be used in the treatment of cotton fabrics to improve their UV protection properties, self-cleaning, elongation and strength, as well as the antimicrobial activities to use the produced textiles for medical and laboratory uses and to increase protection for medical workers taking into account the spread of infection. The results demonstrated that a suitable distribution of prepared AgNPs supported the spherical form. Additionally, AgNPs and TiO2-AgNPs have both achieved stability, with values of (- 20.8 mV and - 30 mV, respectively). The synthesized nanoparticles spread and penetrated textiles' surfaces with efficiency. The findings demonstrated the superior UV protection value (UPF 50+) and self-cleaning capabilities of AgNPs and TiO2-AgNPs. In the treatment with 0.01% AgNPs and TiO2-AgNPs, the tensile strength dropped, but the mechanical characteristics were enhanced by raising the concentration to 0.1%. The results of this investigation demonstrated that the cotton fabric treated with TiO2-AgNPs exhibited superior general characteristics when compared to the sample treated only with AgNPs.
Collapse
Affiliation(s)
| | | | - Azza Abdel-Aziz Mahmoud
- Cotton Technology Research Division, Cotton Research Institute, Agriculture Research Center, Giza, Egypt
| | - Sahar Emam Mohamed
- Cotton Technology Research Division, Cotton Research Institute, Agriculture Research Center, Giza, Egypt
| |
Collapse
|
4
|
Cajiao Checchin V, Cacciari RD, Rubert AA, Lieblich M, Caregnato P, Fagali NS, Fernández Lorenzo de Mele M. Innovative Anodic Treatment to Obtain Stable Metallic Silver Micropatches on TiO 2 Nanotubes: Structural, Electrochemical, and Photochemical Properties. ACS OMEGA 2024; 9:9644-9654. [PMID: 38434842 PMCID: PMC10905698 DOI: 10.1021/acsomega.3c09687] [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: 12/04/2023] [Revised: 01/09/2024] [Accepted: 01/15/2024] [Indexed: 03/05/2024]
Abstract
Electrochemical modification of the Ti surface to obtain TiO2 nanotubes (NT-Ti) has been proposed to enhance osseointegration in medical applications. However, susceptibility to microbial adhesion, linked to biomaterial-associated infections, and the high TiO2 band gap energy, which allows light absorption almost exclusively in the ultraviolet (UV) region, limit its applications. Modifying the TiO2 semiconductor with metals such as Ag has been suggested both for antimicrobial purposes and for absorbing light in the visible region. The formation of NT-Ti with Ag micropatches (Ag-NT-Ti) is pursued with the objective of enhancing the stability of the deposits and preventing cytotoxic levels of Ag cellular uptake. The innovative process proposed here involves immersing NT-Ti in a AgNO3 solution as the initial step. Diverging from previously reported electrochemical methods, this process incorporates anodization within the TiO2 oxide formation region instead of cathodic reduction generally employed by other researchers. The final step encompasses an annealing treatment. The treatments result in the in situ Ag1+ reduction and formation of stable and active micropatches of metallic Ag on the NT-Ti surface. Scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), Raman, diffuse reflectance spectroscopy (DRS), wettability assessment, and electrochemical characterizations were conducted to evaluate the modified surfaces. The well-known properties of NT-Ti surfaces were enhanced, leading to improved photocatalytic activity across both visible and UV regions, significant stability against detachment, and controlled release of Ag1+ for promising antimicrobial effects.
Collapse
Affiliation(s)
- Valentina
C. Cajiao Checchin
- Instituto
de Investigaciones Fisicoquímicas Teóricas y Aplicadas
(INIFTA), CCT La Plata, CONICET, Facultad de Ciencias Exactas, UNLP, C.C. 16 Suc. 4, 1900 La Plata, Argentina
| | - Rodolfo D. Cacciari
- Instituto
de Investigaciones Fisicoquímicas Teóricas y Aplicadas
(INIFTA), CCT La Plata, CONICET, Facultad de Ciencias Exactas, UNLP, C.C. 16 Suc. 4, 1900 La Plata, Argentina
| | - Aldo A. Rubert
- Instituto
de Investigaciones Fisicoquímicas Teóricas y Aplicadas
(INIFTA), CCT La Plata, CONICET, Facultad de Ciencias Exactas, UNLP, C.C. 16 Suc. 4, 1900 La Plata, Argentina
| | - Marcela Lieblich
- Centro
Nacional de Investigaciones Metalúrgicas (CENIM-CSIC), 28040 Madrid, Spain
| | - Paula Caregnato
- Instituto
de Investigaciones Fisicoquímicas Teóricas y Aplicadas
(INIFTA), CCT La Plata, CONICET, Facultad de Ciencias Exactas, UNLP, C.C. 16 Suc. 4, 1900 La Plata, Argentina
| | - Natalia S. Fagali
- Instituto
de Investigaciones Fisicoquímicas Teóricas y Aplicadas
(INIFTA), CCT La Plata, CONICET, Facultad de Ciencias Exactas, UNLP, C.C. 16 Suc. 4, 1900 La Plata, Argentina
| | - Mónica Fernández Lorenzo de Mele
- Instituto
de Investigaciones Fisicoquímicas Teóricas y Aplicadas
(INIFTA), CCT La Plata, CONICET, Facultad de Ciencias Exactas, UNLP, C.C. 16 Suc. 4, 1900 La Plata, Argentina
| |
Collapse
|
5
|
Gbogbo S, Nyankson E, Agyei-Tuffour B, Adofo YK, Mensah B. Multicomponent Photocatalytic-Dispersant System for Oil Spill Remediation. ACS OMEGA 2024; 9:8797-8809. [PMID: 38434850 PMCID: PMC10905576 DOI: 10.1021/acsomega.3c05982] [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: 08/15/2023] [Revised: 01/25/2024] [Accepted: 02/06/2024] [Indexed: 03/05/2024]
Abstract
In the present work, the potential application of a fabricated halloysite nanotubes-Ag-TiO2 (HNT-Ag-TiO2) composite loaded with a binary surfactant mixture made up of lecithin and Tween 80 (LT80) in remediating oil spillages was examined. The as-prepared Ag-TiO2 that was used in the fabrication of the HNT-Ag-TiO2-LT80 composite was characterized by X-ray diffraction, Raman spectroscopy, UV-vis and diffuse reflectance spectroscopy, CV analyses, and SEM-EDX. The synthesized composite was also characterized by thermogravimetric analysis, Fourier-transform infrared spectroscopy, and scanning electron microscopy-energy dispersive X-ray spectroscopy. The synthesized composite was active in both the UV and visible light regions of the electromagnetic spectrum. The oil-remediating potential of the as-prepared composite was examined on crude oil, and aromatics and asphaltene fractions of crude oil. The composite was able to reduce the surface tension, form stable emulsions and smaller oil droplet sizes, and achieve a high dispersion effectiveness of 91.5%. A mixture of each of the crude oil and its fractions and HNT-Ag-TiO2-LT80 was subjected to photodegradation under UV light irradiation. The results from the GC-MS and UV-vis analysis of the photodegraded crude oil revealed that the photocatal composite was able to photodegrade the crude oil, aromatics, and asphaltene fractions of crude oil with the formation of intermediate photodegradation products depicting that the HNT-Ag-TiO2-LT80 has a potential as an oil spill remediation material.
Collapse
Affiliation(s)
- Selassie Gbogbo
- Department of Materials Science
and Engineering, University of Ghana, Legon, LG 77 Accra, Ghana
| | - Emmanuel Nyankson
- Department of Materials Science
and Engineering, University of Ghana, Legon, LG 77 Accra, Ghana
| | - Benjamin Agyei-Tuffour
- Department of Materials Science
and Engineering, University of Ghana, Legon, LG 77 Accra, Ghana
| | - Yaw Kwakye Adofo
- Department of Materials Science
and Engineering, University of Ghana, Legon, LG 77 Accra, Ghana
| | - Bismark Mensah
- Department of Materials Science
and Engineering, University of Ghana, Legon, LG 77 Accra, Ghana
| |
Collapse
|
6
|
Erfan NA, Mahmoud MS, Kim HY, Barakat NAM. Synergistic doping with Ag, CdO, and ZnO to overcome electron-hole recombination in TiO 2 photocatalysis for effective water photo splitting reaction. Front Chem 2023; 11:1301172. [PMID: 38025057 PMCID: PMC10661415 DOI: 10.3389/fchem.2023.1301172] [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: 09/24/2023] [Accepted: 10/23/2023] [Indexed: 12/01/2023] Open
Abstract
This manuscript is dedicated to a comprehensive exploration of the multifaceted challenge of fast electron-hole recombination in titanium dioxide photocatalysis, with a primary focus on its critical role in advancing the field of water photo splitting. To address this challenge, three prominent approaches-Schottky barriers, Z-scheme systems, and type II heterojunctions-were rigorously investigated for their potential to ameliorate TiO2's photocatalytic performance toward water photo splitting. Three distinct dopants-silver, cadmium oxide, and zinc oxide-were strategically employed. This research also delved into the dynamic interplay between these dopants, analyzing the synergetic effects that arise from binary and tertiary doping configurations. The results concluded that incorporation of Ag, CdO, and ZnO dopants effectively countered the fast electron-hole recombination problem in TiO2 NPs. Ag emerged as a critical contributor at higher temperatures, significantly enhancing photocatalytic performance. The photocatalytic system exhibited a departure from Arrhenius behavior, with an optimal temperature of 40°C. Binary doping systems, particularly those combining CdO and ZnO, demonstrated exceptional photocatalytic activity at lower temperatures. However, the ternary doping configuration involving Ag, CdO, and ZnO proved to be the most promising, surpassing many functional materials. In sum, this study offers valuable insights into how Schottky barriers, Z-scheme systems, and type II heterojunctions, in conjunction with specific dopants, can overcome the electron-hole recombination challenge in TiO2-based photocatalysis. The results underscore the potential of the proposed ternary doping system to revolutionize photocatalytic water splitting for efficient green hydrogen production, significantly advancing the field's understanding and potential for sustainable energy applications.
Collapse
Affiliation(s)
- Nehal A. Erfan
- Chemical Engineering Department, Minia University, El-Minia, Egypt
| | - Mohamed S. Mahmoud
- Chemical Engineering Department, Minia University, El-Minia, Egypt
- Department of Engineering, University of Technology and Applied Sciences, Suhar, Oman
| | - Hak Yong Kim
- Department of Nano Convergence Engineering, Jeonbuk National University, Jeonju, Republic of Korea
- Department of Organic Materials and Fiber Engineering, Jeonbuk National University, Jeonju, Republic of Korea
| | | |
Collapse
|
7
|
Elbasuney S, El-Khawaga AM, Elsayed MA, Elsaidy A, Correa-Duarte MA. Enhanced photocatalytic and antibacterial activities of novel Ag-HA bioceramic nanocatalyst for waste-water treatment. Sci Rep 2023; 13:13819. [PMID: 37620510 PMCID: PMC10449880 DOI: 10.1038/s41598-023-40970-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2023] [Accepted: 08/19/2023] [Indexed: 08/26/2023] Open
Abstract
Hydroxyapatite (HA), the most common bioceramic material, offers attractive properties as a catalyst support. Highly crystalline mono-dispersed silver doped hydroxyapatite (Ag-HA) nanorods of 60 nm length was developed via hydrothermal processing. Silver dopant offered enhanced chemisorption for crystal violet (CV) contaminant. Silver was found to intensify negative charge on the catalyst surface; in this regard enhanced chemisorption of positively charged contaminants was accomplished. Silver dopant experienced decrease in the binding energy of valence electron for oxygen, calcium, and phosphorous using X-ray photoelectron spectroscopy XPS/ESCA; this finding could promote electron-hole generation and light absorption. Removal efficiency of Ag-HA nanocomposite for CV reached 88% after the synergistic effect with 1.0 mM H2O2; silver dopant could initiate H2O2 cleavage and intensify the release of active ȮH radicals. Whereas HA suffers from lack of microbial resistance; Ag-HA nanocomposite demonstrated high activity against Gram-positive (S. aureus) bacteria with zone of inhibition (ZOI) mm value of 18.0 mm, and high biofilm inhibition of 91.1%. Ag-HA nanocompsite experienced distinctive characerisitcs for utilization as green bioceramic photocatalyst for wastewater treatment.
Collapse
Affiliation(s)
- Sherif Elbasuney
- Military Technical College, Egyptian Armed Forces, Cairo, Egypt.
- School of Chemical Engineering, Military Technical College, Cairo, Egypt.
| | - Ahmed M El-Khawaga
- Department of Basic Medical Sciences, Faculty of Medicine, Galala University, New Galala City, Suez, Egypt.
| | - Mohamed A Elsayed
- School of Chemical Engineering, Military Technical College, Cairo, Egypt
| | - Amir Elsaidy
- School of Chemical Engineering, Military Technical College, Cairo, Egypt
| | - Miguel A Correa-Duarte
- Department of Physical Chemistry, Biomedical Research Center (CINBIO), and Institute of Biomedical Research of Ourense-Pontevedra-Vigo (IBI), Universidad de Vigo, 36310, Vigo, Spain
| |
Collapse
|
8
|
Effect of anodization time on the morphological, structural, electrochemical, and photocatalytic properties of anodic TiO2 NTs. J SOLID STATE CHEM 2023. [DOI: 10.1016/j.jssc.2023.123939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
|
9
|
Norouzi F, Pourmadadi M, Yazdian F, Khoshmaram K, Mohammadnejad J, Sanati MH, Chogan F, Rahdar A, Baino F. PVA-Based Nanofibers Containing Chitosan Modified with Graphene Oxide and Carbon Quantum Dot-Doped TiO 2 Enhance Wound Healing in a Rat Model. J Funct Biomater 2022; 13:jfb13040300. [PMID: 36547560 PMCID: PMC9784316 DOI: 10.3390/jfb13040300] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2022] [Revised: 12/06/2022] [Accepted: 12/13/2022] [Indexed: 12/23/2022] Open
Abstract
Electrospun nanofibrous constructs based on nanoparticles and biopolymers have recently been used in tissue engineering because of their similarity to the extracellular matrix in nature. In this study, electrospun chitosan-carbon quantum dot-titanium dioxide-graphene oxide (CS-CQD-TiO2-GO) nanofibrous mats were synthesized for use as wound dressings by the electrospinning method. To increase the biodegradation rate and water resistance, the fabricated nanofibrous mats were cross-linked. SEM images showed a uniform and coherent structure of CS-CQD-TiO2-GO nanocomposites and CS-CQD-TiO2-GO electrospun nanofibers mats. FTIR analysis, XRD pattern, SEM mapping, and EDS spectrum demonstrate the accuracy of the synthesis as well as the elemental and chemical structure of the nanofibrous mat. The water contact angle indicated that the nanofibrous mat had a hydrophilic property, which is essential for controlling wound exudates. The tensile strength and elongation tests showed that the nanofibrous mat has suitable mechanical properties for wound dressing, including significant flexibility and strength. Interestingly, antimicrobial testing illustrated that the fabricated nanofibrous mat had antibacterial activity against Gram-negative and Gram-positive bacteria. Appropriate cell viability and cytocompatibility of treated mouse fibroblast NIH3T3 cells with the nanofibrous mat were determined using an MTT assay. The animal study results confirmed the proper potential of the nanofibrous mat in wound dressing applications.
Collapse
Affiliation(s)
- Fatemeh Norouzi
- Department of Biology, Nourdanesh Institute of Higher Education, Meymeh, Isfahan 8351765851, Iran
| | - Mehrab Pourmadadi
- Department of Life Science Engineering, Faculty of New Science and Technologies, University of Tehran, Tehran 1439957131, Iran
| | - Fatemeh Yazdian
- Department of Life Science Engineering, Faculty of New Science and Technologies, University of Tehran, Tehran 1439957131, Iran
- Correspondence: (F.Y.); (A.R.); (F.B.)
| | - Keyvan Khoshmaram
- Department of Life Science Engineering, Faculty of New Science and Technologies, University of Tehran, Tehran 1439957131, Iran
| | - Javad Mohammadnejad
- Department of Life Science Engineering, Faculty of New Science and Technologies, University of Tehran, Tehran 1439957131, Iran
| | - Mohammad Hossein Sanati
- Department of Biology, Nourdanesh Institute of Higher Education, Meymeh, Isfahan 8351765851, Iran
| | - Faraz Chogan
- Department of Life Science Engineering, Faculty of New Science and Technologies, University of Tehran, Tehran 1439957131, Iran
| | - Abbas Rahdar
- Department of Physics, Faculty of science, University of Zabol, Zabol 538-98615, Iran
- Correspondence: (F.Y.); (A.R.); (F.B.)
| | - Francesco Baino
- Institute of Materials Physics and Engineering, Department of Applied Science and Technology, Politecnico di Torino, 10129 Torino, Italy
- Correspondence: (F.Y.); (A.R.); (F.B.)
| |
Collapse
|
10
|
Abu Nayem S, Shah SS, Chaity SB, Biswas BK, Nahar B, Aziz MA, Hossain MZ. Jute stick extract assisted hydrothermal synthesis of zinc oxide nanoflakes and their enhanced photocatalytic and antibacterial efficacy. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.104265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
|
11
|
Li H, Li W, Zhang J, Xie G, Xiong T, Xu H. Preparation and characterization of sodium alginate/gelatin/Ag nanocomposite antibacterial film and its application in the preservation of tangerine. Food Packag Shelf Life 2022. [DOI: 10.1016/j.fpsl.2022.100928] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
|
12
|
Mechanical, antibacterial, and non-cytotoxic performance of polypropylene nanocomposites reinforced with sTiO2 deposited with AgNPs mediated by quercetin biomolecule. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-022-04375-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
|
13
|
Fabrication and characterization of Ag- and Cu-doped TiO2 nanotubes (NTs) by in situ anodization method as an efficient photocatalyst. J Solid State Electrochem 2022. [DOI: 10.1007/s10008-022-05237-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
14
|
Wu L, Pei X, Mei M, Li Z, Lu S. Study on Photocatalytic Performance of Ag/TiO2 Modified Cement Mortar. MATERIALS 2022; 15:ma15114031. [PMID: 35683336 PMCID: PMC9182574 DOI: 10.3390/ma15114031] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/15/2022] [Revised: 06/01/2022] [Accepted: 06/02/2022] [Indexed: 02/04/2023]
Abstract
In this paper, Ag-TiO2 photocatalysts with different Ag contents (1 mol%–5 mol%) were prepared and applied to cement mortar. The photocatalytic performance of Ag-TiO2 and photocatalytic cement mortar under UV light and simulated solar light was evaluated. The results showed that Ag loading on the surface of TiO2 could reduce its band gap width and increase its absorbance in the visible region, and 2% Ag-TiO2 had the highest photocatalytic activity under UV light, the degradation rate of methyl orange (MO) was 95.5% at 30 min, and the first-order reaction constant k was 0.0980 min−1, which was 61.7% higher than that of TiO2, and 5% Ag-TiO2 had the highest photocatalytic activity under solar light, the degradation rate of methylene blue (MB) was 69.8% at 40 min, and the first-order reaction constant k was 0.0294 min−1, which was 90.9% higher than that of TiO2. The photocatalytic mortar prepared by the spraying method has high photocatalytic performance, The MO degradation rate of sample S2 under UV light was 87.5% after 120 min, MB degradation rate of sample S5 under solar light was 75.4% after 120 min. The photocatalytic reaction conforms to the zero-order reaction kinetics, which was 1.5 times–3.3 times higher than that of the mixed samples and has no effect on the mechanical properties of mortar.
Collapse
Affiliation(s)
- Linsong Wu
- School of Urban Construction, Yangtze University, Jingzhou 434023, China; (L.W.); (X.P.); (M.M.); (Z.L.)
| | - Xiaofang Pei
- School of Urban Construction, Yangtze University, Jingzhou 434023, China; (L.W.); (X.P.); (M.M.); (Z.L.)
| | - Mengjun Mei
- School of Urban Construction, Yangtze University, Jingzhou 434023, China; (L.W.); (X.P.); (M.M.); (Z.L.)
| | - Zhen Li
- School of Urban Construction, Yangtze University, Jingzhou 434023, China; (L.W.); (X.P.); (M.M.); (Z.L.)
- Hubei Key Laboratory of Water System Science for Sponge City Construction, Wuhan University, Wuhan 430072, China
| | - Shiwei Lu
- School of Urban Construction, Yangtze University, Jingzhou 434023, China; (L.W.); (X.P.); (M.M.); (Z.L.)
- Correspondence:
| |
Collapse
|
15
|
Shrivastav P, Pramanik S, Vaidya G, Abdelgawad MA, Ghoneim MM, Singh A, Abualsoud BM, Amaral LS, Abourehab MAS. Bacterial cellulose as a potential biopolymer in biomedical applications: a state-of-the-art review. J Mater Chem B 2022; 10:3199-3241. [PMID: 35445674 DOI: 10.1039/d1tb02709c] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Throughout history, natural biomaterials have benefited society. Nevertheless, in recent years, tailoring natural materials for diverse biomedical applications accompanied with sustainability has become the focus. With the progress in the field of materials science, novel approaches for the production, processing, and functionalization of biomaterials to obtain specific architectures have become achievable. This review highlights an immensely adaptable natural biomaterial, bacterial cellulose (BC). BC is an emerging sustainable biopolymer with immense potential in the biomedical field due to its unique physical properties such as flexibility, high porosity, good water holding capacity, and small size; chemical properties such as high crystallinity, foldability, high purity, high polymerization degree, and easy modification; and biological characteristics such as biodegradability, biocompatibility, excellent biological affinity, and non-biotoxicity. The structure of BC consists of glucose monomer units polymerized via cellulose synthase in β-1-4 glucan chains, creating BC nano fibrillar bundles with a uniaxial orientation. BC-based composites have been extensively investigated for diverse biomedical applications due to their similarity to the extracellular matrix structure. The recent progress in nanotechnology allows the further modification of BC, producing novel BC-based biomaterials for various applications. In this review, we strengthen the existing knowledge on the production of BC and BC composites and their unique properties, and highlight the most recent advances, focusing mainly on the delivery of active pharmaceutical compounds, tissue engineering, and wound healing. Further, we endeavor to present the challenges and prospects for BC-associated composites for their application in the biomedical field.
Collapse
Affiliation(s)
- Prachi Shrivastav
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Sector 67, S.A.S. Nagar, Mohali, Punjab 160 062, India.,Bombay College of Pharmacy, Kolivery Village, Mathuradas Colony, Kalina, Vakola, Santacruz East, Mumbai, Maharashtra 400 098, India
| | - Sheersha Pramanik
- Department of Biotechnology, Bhupat and Jyoti Mehta School of Biosciences, Indian Institute of Technology Madras, Chennai 600036, Tamil Nadu, India.
| | - Gayatri Vaidya
- Department of Studies in Food Technology, Davangere University, Davangere 577007, Karnataka, India
| | - Mohamed A Abdelgawad
- Department of Pharmaceutical Chemistry, College of Pharmacy, Jouf University, Sakaka, Al Jouf 72341, Saudi Arabia
| | - Mohammed M Ghoneim
- Department of Pharmacy Practice, Faculty of Pharmacy, AlMaarefa University, Ad Diriyah 13713, Saudi Arabia
| | - Ajeet Singh
- Department of Pharmaceutical Sciences, J.S. University, Shikohabad, Firozabad, UP 283135, India.
| | - Bassam M Abualsoud
- Department of Pharmaceutics and Pharmaceutical Technology, College of Pharmacy, Al-Ahliyya Amman University, Amman, 19328, Jordan
| | - Larissa Souza Amaral
- Department of Bioengineering (USP ALUMNI), University of São Paulo (USP), Av. Trabalhador São Carlense, 400, 13566590, São Carlos (SP), Brazil
| | - Mohammed A S Abourehab
- Department of Pharmaceutics, College of Pharmacy, Umm Al-Qura University, Makkah 21955, Saudi Arabia.,Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Minia University, Minia 11566, Egypt
| |
Collapse
|
16
|
Comparative Degradation Studies of Carmine Dye by Photocatalysis and Photoelectrochemical Oxidation Processes in the Presence of Graphene/N-Doped ZnO Nanostructures. CRYSTALS 2022. [DOI: 10.3390/cryst12040535] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The goal of this study was to synthesize a UV-light-active ZnO photocatalyst by modifying it with nitrogen and graphene, then applying it to the degradation of carmine dye utilizing two promising technologies: photocatalysis and electrochemical oxidation (E.O.). Different techniques were used to analyze the prepared photocatalysts, such as Fourier transform infrared (FTIR), scanning electron microscopy (SEM), and X-ray diffraction (XRD). According to XRD measurements, the produced nanocomposite possesses a hexagonal wurtzite structure, indicating ZnO and markedly crystalline. For photocatalytic applications, the results revealed that the 0.001 g of G/N-doped ZnO catalyst achieved 66.76% degradation of carmine and kinetic degradation rates of 0.007 min−1 within 185 min by photocatalysis under UV light irradiation. In comparison, the same sample reached 100% degradation of carmine and kinetic degradation rates of 0.202 min−1 within 15 min using the electrochemical oxidation method. The improved photocatalytic activity of as-produced nanocomposites can be attributed to intermediate levels in the prohibited bandgap energy and the enhanced oxygen vacancies caused by nitrogen doping. The electrolyte (NaCl) on the degradation of the carmine dye was tested, and the findings indicated that the dye molecules were photodegraded by the 0.001 g of G/N-doped ZnO nanocomposite after a 15 min time interval. The data presented in this work for the carmine breakdown in water give intriguing contrasts between photocatalytic, indirect electrochemical oxidation, and photoelectrochemical oxidation. The action of chlorinated oxidative species, predominantly HClO, which were electrogenerated at the electrode surface due to the chloride ion’s oxidation in solution, induced indirect electrochemical oxidation degradation. This study also revealed that the modifications made to ZnO were beneficial by improving its photocatalytic activities under UV light, as well as a comparison of photocatalysis and electrochemical oxidation processes to determine which technique is best for treating carmine in effluents with high chloride ions.
Collapse
|
17
|
Abstract
Ag–TiO2 nanostructures were prepared by electrospinning, followed by calcination at 400 °C, and their photocatalytic and antibacterial actions were studied. Morphological characterization revealed the presence of one-dimensional uniform Ag–TiO2 nanostructured nanofibers, with a diameter from 65 to 100 nm, depending on the Ag loading, composed of small crystals interconnected with each other. Structural characterization indicated that Ag was successfully integrated as small nanocrystals without affecting much of the TiO2 crystal lattice. Moreover, the presence of nano Ag was found to contribute to reducing the band gap energy, which enables the activation by the absorption of visible light, while, at the same time, it delays the electron–hole recombination. Tests of their photocatalytic activity in methylene blue, amaranth, Congo red and orange II degradation revealed an increase by more than 20% in color removal efficiency at an almost double rate for the case of 0.1% Ag–TiO2 nanofibers with respect to pure TiO2. Moreover, the minimum inhibitory concentration was found as low as 2.5 mg/mL for E. coli and 5 mg/mL against S. aureus for the 5% Ag–TiO2 nanofibers. In general, the Ag–TiO2 nanostructured nanofibers were found to exhibit excellent structure and physical properties and to be suitable for efficient photocatalytic and antibacterial uses. Therefore, these can be suitable for further integration in various important applications.
Collapse
|
18
|
Chakhtouna H, Benzeid H, Zari N, Qaiss AEK, Bouhfid R. Recent progress on Ag/TiO 2 photocatalysts: photocatalytic and bactericidal behaviors. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:44638-44666. [PMID: 34212334 PMCID: PMC8249049 DOI: 10.1007/s11356-021-14996-y] [Citation(s) in RCA: 81] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Accepted: 06/15/2021] [Indexed: 05/23/2023]
Abstract
For many decades, titanium dioxide (TiO2) semiconductor has been extensively applied in several environmental applications due to its higher photocatalytic performances toward different organic pollutants, pharmaceutical compounds, and bacteria. However, its shortfall response to visible light, and the expeditious recombination rate of the photogenerated electron-hole pairs, hampers its utilization. Doping TiO2 semiconductor with silver nanoparticles is a sound strategy to (1) extend its photocatalytic activity to visible light, (2) prevent the electron/holes pairs recombination due to the formation of the Schottky barrier at the interfaces with TiO2 that act as an electron-trapping center, and (3) enhance its bactericide performances. This review focuses on the recent progress on silver-doped titanium dioxide (Ag/TiO2)-based photocatalysts. It addresses a wide range of Ag/TiO2 synthesis techniques, their physicochemical properties and discusses thoroughly the important role of silver (Ag) nanoparticles in enhancing the removal capacity and antibacterial performances of the Ag/TiO2 photocatalysts.
Collapse
Affiliation(s)
- Hanane Chakhtouna
- Moroccan Foundation for Advanced Science, Innovation and Research (MAScIR), Composites and Nanocomposites Center, Rabat Design Center, Rue Mohamed El Jazouli, Madinat El Irfane, 10100, Rabat, Morocco
- Laboratory of Analytical Chemistry and Bromatology, Faculty of Medicine and Pharmacy, Mohammed V University, Rabat, Morocco
| | - Hanane Benzeid
- Laboratory of Analytical Chemistry and Bromatology, Faculty of Medicine and Pharmacy, Mohammed V University, Rabat, Morocco
| | - Nadia Zari
- Moroccan Foundation for Advanced Science, Innovation and Research (MAScIR), Composites and Nanocomposites Center, Rabat Design Center, Rue Mohamed El Jazouli, Madinat El Irfane, 10100, Rabat, Morocco
| | - Abou El Kacem Qaiss
- Moroccan Foundation for Advanced Science, Innovation and Research (MAScIR), Composites and Nanocomposites Center, Rabat Design Center, Rue Mohamed El Jazouli, Madinat El Irfane, 10100, Rabat, Morocco
| | - Rachid Bouhfid
- Moroccan Foundation for Advanced Science, Innovation and Research (MAScIR), Composites and Nanocomposites Center, Rabat Design Center, Rue Mohamed El Jazouli, Madinat El Irfane, 10100, Rabat, Morocco.
| |
Collapse
|
19
|
Olivares-Ramírez MA, López-Zamora L, Peña-Juárez MG, Gutiérrez-Castañeda EJ, Gonzalez-Calderon JA. Application of the response surface methodology for the evaluation of Staphylococcus aureus inhibition with Ag/TiO2 nanoparticles. Polym Bull (Berl) 2021. [DOI: 10.1007/s00289-021-03822-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
|
20
|
Magnetic ZnO Crystal Nanoparticle Growth on Reduced Graphene Oxide for Enhanced Photocatalytic Performance under Visible Light Irradiation. Molecules 2021; 26:molecules26082269. [PMID: 33919832 PMCID: PMC8070817 DOI: 10.3390/molecules26082269] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 04/08/2021] [Accepted: 04/09/2021] [Indexed: 11/17/2022] Open
Abstract
Magnetite zinc oxide (MZ) (Fe3O4/ZnO) with different ratios of reduced graphene oxide (rGO) was synthesized using the solid-state method. The structural and optical properties of the nanocomposites were analyzed using transmission electron microscopy (TEM), X-ray diffraction (XRD), Raman spectroscopy, Fourier-transform infrared spectroscopy (FTIR), ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis/DRS), and photoluminescence (PL) spectrophotometry. In particular, the analyses show higher photocatalytic movement for crystalline nanocomposite (MZG) than MZ and ZnO nanoparticles. The photocatalytic degradation of methylene blue (MB) with crystalline ZnO for 1.5 h under visible light was 12%. By contrast, the photocatalytic activity for MZG was more than 98.5%. The superior photocatalytic activity of the crystalline nanocomposite was detected to be due to the synergistic effect between magnetite and zinc oxide in the presence of reduced graphene oxide. Moreover, the fabricated nanocomposite had high electron-hole stability. The crystalline nanocomposite was stable when the material was used several times.
Collapse
|
21
|
Ghasemzadeh MA, Elyasi Z, Monfared MRZ. Enhanced Removal of Methyl Violet Dye from Aqueous Solution by a Novel Co3O4@SiO2@TiO2-Ag Heterogeneous Semiconductor. Comb Chem High Throughput Screen 2021; 25:883-894. [PMID: 33645475 DOI: 10.2174/1386207324666210301090123] [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: 11/03/2020] [Revised: 01/28/2021] [Accepted: 02/08/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND This research introduces the application of a novel photocatalyst including Co3O@SiO2@TiO2-Ag nanocomposite with highly photocatalytic stability and core-shell structure for the removal of toxic methyl violet from aqueous solution. OBJECTIVE The removal of toxic dyes and organic contaminants from water is outstanding research area between scientists. Methyl violet as a toxic cationic pollutant has disruptive influence for humans. In this research, with a aim to remove to methyl violet from the wastewater we developed a new photocatalyst including Co3O4@SiO2@TiO2-Ag nanocomposite as a eco-friendly and low-cost nanostructure with high photocatalytic activity in order to reduce the risks of this pollutant from aqueous media. METHODS The Co3O4@SiO2@TiO2-Ag nanostructure was prepared via hydrothermal and sol-gel methods and the structure elucidation of the prepared photocatalyst was analyzed by different spectroscopy techniques including XRD, FT-IR, FE-SEM, TEM, VSM and EDX. RESULTS Photodegradation of methyl violet in the presence of different structures showed that Co3O4@SiO2@TiO2-Ag is superior photocatalytic activity (about 98% was decomposed after 40 min) compared to the previous shells and pure Co3O4 NPs. Loadings of SiO2@TiO2-Ag nanocomposite over the Co3O4 surface led to the reduction in the band gap energy of visible light and improvement in the photocatalytic activity of Methyl Violet dye for the aqueous phase decomposition. CONCLUSION The remarkable benefits of this nanocomposite are highly photocatalytic efficiency in the degradation of methyl violet (almost 100 % within 1 h), easy magnetic separation, low cost, and high chemical stability. The collected results demonstrated the rate of degradation is increased by increasing the irradiation time, while the rate of degradation is decreased by dye concentration.
Collapse
Affiliation(s)
- Mohammad Ali Ghasemzadeh
- Department of Chemistry, Qom Branch, Islamic Azad University, Qom, I. R. Iran Post Box: 37491-13191. Iran
| | - Zahar Elyasi
- Department of Chemistry, Qom Branch, Islamic Azad University, Qom, I. R. Iran Post Box: 37491-13191. Iran
| | | |
Collapse
|
22
|
Fattahi A, Arlos MJ, Bragg LM, Kowalczyk S, Liang R, Schneider OM, Zhou N, Servos MR. Photodecomposition of pharmaceuticals and personal care products using P25 modified with Ag nanoparticles in the presence of natural organic matter. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 752:142000. [PMID: 32889254 DOI: 10.1016/j.scitotenv.2020.142000] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 08/24/2020] [Accepted: 08/24/2020] [Indexed: 06/11/2023]
Abstract
The presence of pharmaceuticals and personal care products (PPCPs) in water remains a concern due to their potential threat to environmental and human health. Advanced oxidation processes (AOPs) have been receiving attention in water treatment studies to remove PPCPs. However, most studies have been focused on pure water containing a limited number of substances. In this study, the photocatalytic efficiency of commercially available titanium dioxide nanoparticles (P25) and P25 modified by silver nanoparticles (Ag-P25) were compared for their ability to degrade 23 target PPCPs (2 μg L-1) in realistic water matrices containing natural organic matter (Suwanee River NOM, 6.12 mg L-1). The experiments were completed under ultraviolet-light emitting diode (UV-LED) illumination at 365 and 405 nm wavelengths, with the latter representing visible light exposure. Under 365 nm UV-LED treatment, 99% of the PPCPs were removed using both P25 and Ag-P25 photocatalysts within 180 min of the treatment duration. The number of PPCPs removed dropped to 57% and 53% for P25 and Ag-P25 respectively under the 405 nm UV-LED irradiation. Dissolved organic carbon (DOC) and UV absorbance at 254 nm (UV254) measured at the end of the experiment indicated that the aromatic fraction of NOM was preferentially removed from the water matrix. Also, Ag-P25 was more effective in DOC removal than P25. The relationships of removal rate constants with physico-chemical properties of the substances were also determined. The molecular weight and charge were strongly associated with removal, with the former and the latter being positively and negatively correlated with the rate constants. The results of this work indicate that Ag-P25 is a promising photocatalyst to degrade persistent substances such as PPCPs and NOM even if they are present in a complex water matrix. The properties of individual substances can also be employed as an indication of their removal using this technology.
Collapse
Affiliation(s)
- Azar Fattahi
- Centre for Advanced Materials Joining, Department of Mechanical and Mechatronics Engineering, University of Waterloo, Waterloo N2L3G1, Ontario, Canada; Department of Biology, University of Waterloo, Waterloo N2L3G1, ON, Canada.
| | - Maricor J Arlos
- Civil and Environmental Engineering, University of Alberta, Edmonton T6G1H9, Alberta, Canada
| | - Leslie M Bragg
- Department of Biology, University of Waterloo, Waterloo N2L3G1, ON, Canada
| | - Sarah Kowalczyk
- Department of Biology, University of Waterloo, Waterloo N2L3G1, ON, Canada
| | - Robert Liang
- Centre for Advanced Materials Joining, Department of Mechanical and Mechatronics Engineering, University of Waterloo, Waterloo N2L3G1, Ontario, Canada; Department of Biology, University of Waterloo, Waterloo N2L3G1, ON, Canada; Waterloo Institute of Nanotechnology, University of Waterloo, Waterloo N2L3G1, Ontario, Canada
| | - Olivia M Schneider
- Department of Biology, University of Waterloo, Waterloo N2L3G1, ON, Canada
| | - Norman Zhou
- Centre for Advanced Materials Joining, Department of Mechanical and Mechatronics Engineering, University of Waterloo, Waterloo N2L3G1, Ontario, Canada
| | - Mark R Servos
- Department of Biology, University of Waterloo, Waterloo N2L3G1, ON, Canada
| |
Collapse
|
23
|
Kacprzyńska-Gołacka J, Łożyńska M, Barszcz W, Sowa S, Wieciński P, Woskowicz E. Microfiltration Membranes Modified with Composition of Titanium Oxide and Silver Oxide by Magnetron Sputtering. Polymers (Basel) 2020; 13:polym13010141. [PMID: 33396349 PMCID: PMC7795832 DOI: 10.3390/polym13010141] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 12/28/2020] [Accepted: 12/28/2020] [Indexed: 11/16/2022] Open
Abstract
In this work, the authors present the possibility of modification of polymer membranes by TiO2 + AgO coating created by the magnetron sputtering method. The two-component TiO2 + AgO coating can improve and shape new functional properties such as bactericidal and photocatalytic properties. The influence of magnetron power changes on the structure of the membrane was investigated as well. The structure and elemental composition of TiO2 + AgO coatings were analyzed using SEM and EDS technique. All deposited coatings caused a total inhibition of the growth of two investigated colonies of Escherichia coli and Bacillus subtilis on the surface. The photocatalytic properties for membranes covered with oxide coatings were tested under UV irradiation and visible light. The filtration result show that polymer membranes covered with two-component TiO2 + AgO coatings have a permeate flux similar to the non-coated membranes.
Collapse
Affiliation(s)
- Joanna Kacprzyńska-Gołacka
- Łukasiewicz Research Networks—Institute for Sustainable Technology, 6/10 Pułaskiego St., 26-600 Radom, Poland; (M.Ł.); (W.B.); (S.S.); (E.W.)
- Correspondence: ; Tel./Fax: +48-48-364-93-32
| | - Monika Łożyńska
- Łukasiewicz Research Networks—Institute for Sustainable Technology, 6/10 Pułaskiego St., 26-600 Radom, Poland; (M.Ł.); (W.B.); (S.S.); (E.W.)
| | - Wioletta Barszcz
- Łukasiewicz Research Networks—Institute for Sustainable Technology, 6/10 Pułaskiego St., 26-600 Radom, Poland; (M.Ł.); (W.B.); (S.S.); (E.W.)
| | - Sylwia Sowa
- Łukasiewicz Research Networks—Institute for Sustainable Technology, 6/10 Pułaskiego St., 26-600 Radom, Poland; (M.Ł.); (W.B.); (S.S.); (E.W.)
| | - Piotr Wieciński
- Faculty of Materials Science and Engineering, Warsaw University of Technology, 141 Woloska St., 02-507 Warsaw, Poland;
| | - Ewa Woskowicz
- Łukasiewicz Research Networks—Institute for Sustainable Technology, 6/10 Pułaskiego St., 26-600 Radom, Poland; (M.Ł.); (W.B.); (S.S.); (E.W.)
| |
Collapse
|
24
|
Wafi A, Szabó-Bárdos E, Horváth O, Pósfai M, Makó É, Juzsakova T, Fónagy O. The Photocatalytic and Antibacterial Performance of Nitrogen-Doped TiO 2: Surface-Structure Dependence and Silver-Deposition Effect. NANOMATERIALS 2020; 10:nano10112261. [PMID: 33203178 PMCID: PMC7697533 DOI: 10.3390/nano10112261] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 11/09/2020] [Accepted: 11/13/2020] [Indexed: 11/16/2022]
Abstract
Catalysts for visible-light-driven oxidative cleaning processes and antibacterial applications (also in the dark) were developed. In order to extend the photoactivity of titanium dioxide into the visible region, nitrogen-doped TiO2 catalysts with hollow and non-hollow structures were synthesized by co-precipitation (NT-A) and sol–gel (NT-U) methods, respectively. To increase their photocatalytic and antibacterial efficiencies, various amounts of silver were successfully loaded on the surfaces of these catalysts by using a facile photo-deposition technique. Their physical and chemical properties were evaluated by using scanning electron microscopy (SEM), transmission electron microscopy–energy dispersive X-ray spectroscopy (TEM–EDS), Brunauer–Emmett–Teller (BET) surface area, X-ray diffraction (XRD), and diffuse reflectance spectra (DRS). The photocatalytic performances of the synthesized catalysts were examined in coumarin and 1,4-hydroquinone solutions. The results showed that the hollow structure of NT-A played an important role in obtaining high specific surface area and appreciable photoactivity. In addition, Ag-loading on the surface of non-hollow structured NT-U could double the photocatalytic performance with an optimum Ag concentration of 10−6 mol g−1, while a slight but monotonous decrease was caused in this respect for the hollow surface of NTA upon increasing Ag concentration. Comparing the catalysts with different structures regarding the photocatalytic performance, silverized non-hollow NT-U proved competitive with the hollow NT-A catalyst without Ag-loading for efficient visible-light-driven photocatalytic oxidative degradations. The former one, due to the silver nanoparticles on the catalyst surface, displayed an appreciable antibacterial activity, which was comparable to that of a reference material practically applied for disinfection in polymer coatings.
Collapse
Affiliation(s)
- Abdul Wafi
- Department of General and Inorganic Chemistry, Center for Natural Sciences, University of Pannonia, H-8210 Veszprem, POB. 1158, Hungary; (A.W.); (E.S.-B.); (O.F.)
- Laboratory of Pharmaceutical Chemistry, Department of Pharmacy, Universitas Islam Negeri Maulana Malik Ibrahim Malang, Malang 65144, Indonesia
| | - Erzsébet Szabó-Bárdos
- Department of General and Inorganic Chemistry, Center for Natural Sciences, University of Pannonia, H-8210 Veszprem, POB. 1158, Hungary; (A.W.); (E.S.-B.); (O.F.)
| | - Ottó Horváth
- Department of General and Inorganic Chemistry, Center for Natural Sciences, University of Pannonia, H-8210 Veszprem, POB. 1158, Hungary; (A.W.); (E.S.-B.); (O.F.)
- Correspondence: ; Tel.: +36-88-624-000 (ext. 6049)
| | - Mihály Pósfai
- Environmental Mineralogy Research Group, Research Institute of Biomolecular and Chemical Engineering, University of Pannonia, H-8210 Veszprem, POB. 1158, Hungary;
| | - Éva Makó
- Department of Materials Engineering, Research Center for Engineering Sciences, University of Pannonia, H-8210 Veszprem, POB. 1158, Hungary;
| | - Tatjána Juzsakova
- Laboratory for Surfaces and Nanostructures, Research Center for Biochemical, Environmental and Chemical Engineering, University of Pannonia, H-8210 Veszprem, POB. 1158, Hungary;
| | - Orsolya Fónagy
- Department of General and Inorganic Chemistry, Center for Natural Sciences, University of Pannonia, H-8210 Veszprem, POB. 1158, Hungary; (A.W.); (E.S.-B.); (O.F.)
| |
Collapse
|
25
|
Mérai L, Deák Á, Sebők D, Kukovecz Á, Dékány I, Janovák L. A Stimulus-Responsive Polymer Composite Surface with Magnetic Field-Governed Wetting and Photocatalytic Properties. Polymers (Basel) 2020; 12:polym12091890. [PMID: 32839403 PMCID: PMC7564196 DOI: 10.3390/polym12091890] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 08/17/2020] [Accepted: 08/18/2020] [Indexed: 12/17/2022] Open
Abstract
With the increasing demand for liquid manipulation and microfluidic techniques, surfaces with real-time tunable wetting properties are becoming the focus of materials science researches. In this study, we present a simple preparation method for a 0.5-4 µm carbonyl iron (carbonyl Fe) loaded polydimethylsiloxane (PDMS)-based magnetic composite coating with magnetic field-tailored wetting properties. Moreover, the embedded 6.3-16.7 wt.% Ag-TiO2 plasmonic photocatalyst (d~50 nm) content provides additional visible light photoreactivity to the external stimuli-responsive composite grass surfaces, while the efficiency of this photocatalytic behavior also turned out to be dependent on the external magnetic field. The inclusion of the photocatalyst introduced hierarchical surface roughness to the micro-grass, resulting in the broadening of the achievable contact and sliding angle ranges. The photocatalyst-infused coatings are also capable of catching and releasing water droplets, which alongside their multifunctional (photocatalytic activity and tunable wetting characteristics) nature makes surfaces of this kind the novel sophisticated tools of liquid manipulation.
Collapse
Affiliation(s)
- László Mérai
- Interdisciplinary Excellence Centre, Department of Physical Chemistry and Materials Science, University of Szeged, Rerrich Béla tér 1, H-6720 Szeged, Hungary; (L.M.); (Á.D.); (I.D.)
| | - Ágota Deák
- Interdisciplinary Excellence Centre, Department of Physical Chemistry and Materials Science, University of Szeged, Rerrich Béla tér 1, H-6720 Szeged, Hungary; (L.M.); (Á.D.); (I.D.)
| | - Dániel Sebők
- Interdisciplinary Excellence Centre, Department of Applied and Environmental Chemistry, University of Szeged, Rerrich Béla tér 1, H-6720 Szeged, Hungary; (D.S.); (Á.K.)
| | - Ákos Kukovecz
- Interdisciplinary Excellence Centre, Department of Applied and Environmental Chemistry, University of Szeged, Rerrich Béla tér 1, H-6720 Szeged, Hungary; (D.S.); (Á.K.)
| | - Imre Dékány
- Interdisciplinary Excellence Centre, Department of Physical Chemistry and Materials Science, University of Szeged, Rerrich Béla tér 1, H-6720 Szeged, Hungary; (L.M.); (Á.D.); (I.D.)
| | - László Janovák
- Interdisciplinary Excellence Centre, Department of Physical Chemistry and Materials Science, University of Szeged, Rerrich Béla tér 1, H-6720 Szeged, Hungary; (L.M.); (Á.D.); (I.D.)
- Correspondence: ; Tel.: +36-62-544-210
| |
Collapse
|
26
|
Peña-Juárez MG, Robles-Martínez M, Méndez-Rodríguez KB, López-Esparza R, Pérez E, Gonzalez-Calderon JA. Role of the chemical modification of titanium dioxide surface on the interaction with silver nanoparticles and the capability to enhance antimicrobial properties of poly(lactic acid) composites. Polym Bull (Berl) 2020. [DOI: 10.1007/s00289-020-03235-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
27
|
Lin D, Yang Y, Wang J, Yan W, Wu Z, Chen H, Zhang Q, Wu D, Qin W, Tu Z. Preparation and characterization of TiO 2-Ag loaded fish gelatin-chitosan antibacterial composite film for food packaging. Int J Biol Macromol 2020; 154:123-133. [PMID: 32171840 DOI: 10.1016/j.ijbiomac.2020.03.070] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Revised: 03/02/2020] [Accepted: 03/10/2020] [Indexed: 11/25/2022]
Abstract
In this study, fish gelatin and chitosan were used as the film-forming substrate, and different concentrations of TiO2-Ag were added to prepare composite films. The physicochemical characteristics and microstructure of the films were studied. The results showed that the addition of TiO2-Ag significantly increased the water solubility of the film. When the TiO2-Ag concentration was increased to 0.5%, the film had the best antibacterial ability and the lowest light transmittance (54.6%), but the tensile strength of the film was the lowest, decreased from 17.39 MPa to 9.014 MPa. The water vapor permeability of film first decreased and then increased, and the minimum value was 2.63 × 10-12 g·cm/cm2·s·Pa when the concentration of TiO2-Ag was 0.4%. XRD, XPS, and ATR-FTIR results showed that the presence of TiO2-Ag crystals in the film could enhance the interaction between the components, and FE-SEM results showed that the film had a very smooth and uniform surface. In general, FG/Ch/TiO2-Ag composite film is expected to be used in the food packaging industry.
Collapse
Affiliation(s)
- Derong Lin
- College of Food Science, Sichuan Agricultural University, Ya'an 625014, China.
| | - Yuanmeng Yang
- College of Food Science, Sichuan Agricultural University, Ya'an 625014, China
| | - Jie Wang
- College of Food Science, Sichuan Agricultural University, Ya'an 625014, China
| | - Wenjing Yan
- College of Food Science, Sichuan Agricultural University, Ya'an 625014, China
| | - Zhijun Wu
- College of Mechanical and Electrical Engineering, Sichuan Agricultural University, Ya'an 625014, China.
| | - Hong Chen
- College of Food Science, Sichuan Agricultural University, Ya'an 625014, China
| | - Qing Zhang
- College of Food Science, Sichuan Agricultural University, Ya'an 625014, China
| | - Dingtao Wu
- College of Food Science, Sichuan Agricultural University, Ya'an 625014, China
| | - Wen Qin
- College of Food Science, Sichuan Agricultural University, Ya'an 625014, China
| | - Zongcai Tu
- National R&D Center for Freshwater Fish Processing, Jiangxi Normal University, Nanchang 330022, China; Engineering Research Center for Freshwater Fish High-value Utilization of Jiangxi, Jiangxi Normal University, Nanchang 330022, China; State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China
| |
Collapse
|
28
|
Din MI, Khalid R, Hussain Z. Recent Research on Development and Modification of Nontoxic Semiconductor for Environmental Application. SEPARATION & PURIFICATION REVIEWS 2020. [DOI: 10.1080/15422119.2020.1714658] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
| | - Rida Khalid
- Institute of Chemistry, University of the Punjab, Lahore, Pakistan
| | - Zaib Hussain
- Institute of Chemistry, University of the Punjab, Lahore, Pakistan
| |
Collapse
|
29
|
Malmir S, Karbalaei A, Pourmadadi M, Hamedi J, Yazdian F, Navaee M. Antibacterial properties of a bacterial cellulose CQD-TiO 2 nanocomposite. Carbohydr Polym 2020; 234:115835. [PMID: 32070499 DOI: 10.1016/j.carbpol.2020.115835] [Citation(s) in RCA: 75] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2019] [Revised: 01/04/2020] [Accepted: 01/06/2020] [Indexed: 12/12/2022]
Abstract
Antibacterial dressing can prevent the occurrence of many infections of wounds. Bacterial cellulose (BC) has the ability to carry and transfer the medicine to achieve a wound healing bandage. In this study, Carbon Quantum Dots-Titanium dioxide (CQD-TiO2) nanoparticles (NP) were added to BC as antibacterial agents. FTIR Spectroscopy illuminated that NPs were well-bonded to BC. Interestingly, MIC test proved that BC/CQD-TiO2 nanostructure (NS) has anti-bacterial properties against Staphylococcus aureus. The findings indicated that, CQD-TiO2 NPs have stronger antibacterial properties with better tensile strength compared to CQD NPs, in a concentration-dependent manner. Toxicity of CQD-TiO2 NPs on human L929 fibroblast cells was also evaluated. Most importantly, the results of the scratch test indicated that the NS was effective in wound healing in L929 cells. The approach in this study may provide an alternative to make an antibacterial wound dressing to achieve an effective drug-based bandage.
Collapse
Affiliation(s)
- Samira Malmir
- Department of Biotechnology, Faculty of Advanced Science and Technology, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran.
| | - Atiyeh Karbalaei
- Department of Biotechnology, Faculty of Advanced Science and Technology, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran.
| | - Mehrab Pourmadadi
- Protein Research Center, Shahid Beheshti University, GC, Tehran, Iran.
| | - Javad Hamedi
- Microbial Technology and Products (MTP) Research Center, University of Tehran, Tehran, Iran; Department of Life Science Engineering, Faculty of New Science and Technologies, University of Tehran, Tehran, Iran.
| | - Fatemeh Yazdian
- Department of Microbial Biotechnology, School of Biology and Centre of Excellence in Phylogeny of Living Organisms, College of Science, University of Tehran, Tehran, Iran.
| | - Mona Navaee
- Pharmaceutical Sciences Research Center, The Institute of Pharmaceutical Sciences (TIPS), Tehran University of Medical Science, Tehran, Iran
| |
Collapse
|
30
|
Makvandi P, Gu JT, Zare EN, Ashtari B, Moeini A, Tay FR, Niu LN. Polymeric and inorganic nanoscopical antimicrobial fillers in dentistry. Acta Biomater 2020; 101:69-101. [PMID: 31542502 DOI: 10.1016/j.actbio.2019.09.025] [Citation(s) in RCA: 118] [Impact Index Per Article: 29.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Revised: 07/26/2019] [Accepted: 09/17/2019] [Indexed: 02/08/2023]
Abstract
Failure of dental treatments is mainly due to the biofilm accumulated on the dental materials. Many investigations have been conducted on the advancements of antimicrobial dental materials. Polymeric and inorganic nanoscopical agents are capable of inhibiting microorganism proliferation. Applying them as fillers in dental materials can achieve enhanced microbicidal ability. The present review provides a broad overview on the state-of-the-art research in the field of antimicrobial fillers which have been adopted for incorporation into dental materials over the last 5 years. The antibacterial agents and applications are described, with the aim of providing information for future investigations. STATEMENT OF SIGNIFICANCE: Microbial infection is the primary cause of dental treatment failure. The present review provides an overview on the state-of-art in the field of antimicrobial nanoscopical or polymeric fillers that have been applied in dental materials. Trends in the biotechnological development of these antimicrobial fillers over the last 5 years are reviewed to provide a backdrop for further advancement in this field of research.
Collapse
|
31
|
Oladipo GO, Akinlabi AK, Alayande SO, Msagati TA, Nyoni HH, Ogunyinka OO. Synthesis, characterization, and photocatalytic activity of silver and zinc co-doped TiO2 nanoparticle for photodegradation of methyl orange dye in aqueous solution. CAN J CHEM 2019. [DOI: 10.1139/cjc-2018-0308] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In this study, TiO2 nanocrystals, 1 mol% Ag-doped TiO2, and 1 mol% Ag and 0.6 mol% Zn co-doped TiO2 powders were synthesized by the sol–gel route. Their photocatalytic activities on methyl orange dye under visible irradiation were investigated. The powders were characterized by X-ray diffraction (XRD), UV–visible spectroscopy (UV–vis), Brunauer–Emmett–Teller (BET), and Fourier transform infrared spectroscopy (FTIR). The XRD results revealed the presence of a rutile phase with an average crystallite size of 9 and 11 nm. The UV–vis spectra showed a red-shift towards a longer wavelength with the corresponding decrease in band gap from 2.9 to 2.5 eV. The BET surface areas of the nanoparticles ranged from 4.7 to 11.8 m2 g−1 with an average pore size between 18.9 and 56.6 nm. The Ag-doped TiO2 has the largest surface area of 11.8 m2 g−1, whereas the Ag–Zn co-doped TiO2 was found to have the highest pore size and volume. The absorption bands at 750–500 cm−1 were attributed to the –O–Ti–O– bond in the TiO2 lattice. The photocatalytic efficiency was highest at an optimum pH of 4.1 for Ag–Zn co-doped TiO2. The results confirmed that Ag-doped and Ag–Zn co-doped TiO2 were more effective than pure TiO2. The kinetic data were fitted into a pseudo first-order equation using a Langmuir–Hinshelwood kinetic model.
Collapse
Affiliation(s)
- Gabriel O. Oladipo
- Department of Chemistry, Federal University of Agriculture, Abeokuta, Ogun State, Nigeria
- Department of Science Laboratory Technology, D.S. Adegbenro ICT Polytechnic, Itori-Ewekoro, Ogun State, Nigeria
| | - Akinola K. Akinlabi
- Department of Chemistry, Federal University of Agriculture, Abeokuta, Ogun State, Nigeria
| | - Samson O. Alayande
- Department of Industrial Chemistry, First Technical University, Ibadan, Oyo State, Nigeria
| | - Titus A.M. Msagati
- Nanotechnology and Water Sustainability Research Unit, College of Science Engineering and Technology, University of South Africa, Florida, South Africa
| | - Hlengilizwe H. Nyoni
- Nanotechnology and Water Sustainability Research Unit, College of Science Engineering and Technology, University of South Africa, Florida, South Africa
| | - Opeyemi O. Ogunyinka
- Department of Science Laboratory Technology, D.S. Adegbenro ICT Polytechnic, Itori-Ewekoro, Ogun State, Nigeria
| |
Collapse
|
32
|
Farshchi E, Pirsa S, Roufegarinejad L, Alizadeh M, Rezazad M. Photocatalytic/biodegradable film based on carboxymethyl cellulose, modified by gelatin and TiO2-Ag nanoparticles. Carbohydr Polym 2019; 216:189-196. [DOI: 10.1016/j.carbpol.2019.03.094] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Revised: 03/22/2019] [Accepted: 03/26/2019] [Indexed: 10/27/2022]
|
33
|
Phrompet C, Sriwong C, Srepusharawoot P, Maensiri S, Chindaprasirt P, Ruttanapun C. Effect of free oxygen radical anions and free electrons in a Ca 12Al 14O 33 cement structure on its optical, electronic and antibacterial properties. Heliyon 2019; 5:e01808. [PMID: 31193906 PMCID: PMC6545333 DOI: 10.1016/j.heliyon.2019.e01808] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 04/21/2019] [Accepted: 05/21/2019] [Indexed: 01/18/2023] Open
Abstract
The aim of this work was to investigate the effect of free oxygen radicals and free electrons in a Ca12Al14O33 (C12A7) cement structure on the optical, electronic and antibacterial activity of this material. Ca12Al14O33 was successfully fabricated via rapid heating to high temperatures by high frequency electromagnetic induction. Ca12Al14O33 cement samples were characterized using XRD and UV-Vis-DRS spectroscopy. The morphology and chemical composition of the samples were also investigated using SEM and EDS techniques. The presence of free oxygen radicals (O2 -ions) in the insulating structure of Ca12Al14O33 was confirmed using Raman spectroscopy showing a spectrum peak at 1067 cm-1. The excitation of free electrons in the Ca12Al14O33 cement was indicated by UV-Vis absorption spectra at 2.8 eV and an optical energy gap of 3.5 eV, which is consistent with the first-principles calculations for the band energy level. The effects of free oxygen radicals and free electrons in the Ca12Al14O33 structure as antibacterial agents against Escherichia Coli (E. coli) and Staphylococcus Aureus (S. aureus) were investigated using an agar disk-diffusion method. The presence of O2 - anions as a reactive oxygen species (ROS) at the surface of Ca12Al14O33 caused inhibition of E. coli and S. aureus cells. The free electrons in the conducting C12A7 reacted with O2 gas to produce ROS, specifically super oxides (O2 -), superoxide radicals (O2 •-), hydroxyl radicals (OH•) and hydrogen peroxide (H2O2), which exhibited antibacterial properties. Both mechanisms were active against bacteria without effects from nano-particle sized materials and photocatalytic activity. The experimental results showed that the production of ROS from free electrons was greater than that of the free O2 - anions in the structure of Ca12Al14O33. The antibacterial actions for insulating and conducting Ca12Al14O33 were different for E. coli and S. aureus. Thus, Ca12Al14O33 cement has antibacterial properties that do not require the presence of nano-particle sizes materials or photocatalysis.
Collapse
Affiliation(s)
- Chaiwat Phrompet
- Smart Materials Research and Innovation Unit (SMRIU), Faculty of Science, King Mongkut's Institute of Technology Ladkrabang, Chalongkrung Road, Ladkrabang, Bangkok 10520, Thailand
- Department of Physics, Faculty of Science, King Mongkut's Institute of Technology Ladkrabang, Chalongkrung Road, Ladkrabang, Bangkok 10520, Thailand
| | - Chaval Sriwong
- Smart Materials Research and Innovation Unit (SMRIU), Faculty of Science, King Mongkut's Institute of Technology Ladkrabang, Chalongkrung Road, Ladkrabang, Bangkok 10520, Thailand
- Department of Chemistry, Faculty of Science, King Mongkut's Institute of Technology Ladkrabang, Chalongkrung Road, Ladkrabang, Bangkok 10520, Thailand
- Thailand Center of Excellence in Physics, Commission on Higher Education, 328 Si Ayutthaya Road, Bangkok 10400, Thailand
| | - Pornjuk Srepusharawoot
- Institute of Nanomaterials Research and Innovation for Energy (IN-RIE), Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand
- Thailand Center of Excellence in Physics, Commission on Higher Education, 328 Si Ayutthaya Road, Bangkok 10400, Thailand
| | - Santi Maensiri
- School of Physics, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
- Thailand Center of Excellence in Physics, Commission on Higher Education, 328 Si Ayutthaya Road, Bangkok 10400, Thailand
| | - Prinya Chindaprasirt
- Sustainable Infrastructure Research and Development Center, Department of Civil Engineering, Faculty of Engineering, Khon Kaen University, Khon Kaen 40002, Thailand
- Academy of Science, The Royal Society of Thailand, Dusit, Bangkok 10300, Thailand
| | - Chesta Ruttanapun
- Smart Materials Research and Innovation Unit (SMRIU), Faculty of Science, King Mongkut's Institute of Technology Ladkrabang, Chalongkrung Road, Ladkrabang, Bangkok 10520, Thailand
- Department of Physics, Faculty of Science, King Mongkut's Institute of Technology Ladkrabang, Chalongkrung Road, Ladkrabang, Bangkok 10520, Thailand
- Thailand Center of Excellence in Physics, Commission on Higher Education, 328 Si Ayutthaya Road, Bangkok 10400, Thailand
| |
Collapse
|
34
|
Jain A, Kumar S, Seena S. Can low concentrations of metal oxide and Ag loaded metal oxide nanoparticles pose a risk to stream plant litter microbial decomposers? THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 653:930-937. [PMID: 30759618 DOI: 10.1016/j.scitotenv.2018.10.376] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Revised: 10/25/2018] [Accepted: 10/27/2018] [Indexed: 06/09/2023]
Abstract
Nanoparticles (NPs) continue to be extensively produced by many industries, which ultimately leads to its release into the aquatic environment. It is crucial to estimate the impact of low concentrations of NPs which are environmentally relevant. Litter decomposition is a key ecological process in forested streams; microbes like fungi and bacteria are recognised to play a vital role in litter decomposition. In this study, zinc oxide (ZnO), titanium dioxide (TiO2), silver loaded ZnO (Ag/ZnO) and silver loaded TiO2 (Ag/TiO2) NPs were synthesized, and impacts of low concentrations (0, 2.5, 25, 50 μM) on leaf litter decomposition, fungal sporulation and bacterial growth were assessed. Fungal assemblages consisting of Articulospora tetracladia, Neonectria lugdunensis, Tricladium splendens and Varicosporium elodeae were used to study litter decomposition in microcosms exposed to NPs for 21 days. Two freshwater bacterial species belonging to the family Enterobacteriaceae were used to assess growth after 12 h of exposure to NPs. Types and concentrations of NPs affected litter decomposition and sporulation but not growth of bacteria. Leaf mass loss was significantly different between all concentrations but not between 25 and 50 μM. Fungal sporulation was significantly different among all concentrations of NPs. Fungal sporulation decreased with increase in concentration of NPs whereas a particular trend was not observed with mass loss except for Ag/ZnO. A 50 μM of Ag/ZnO had the highest impact on litter decomposition while 50 μM of ZnO on sporulation. The impact of Ag loaded metal oxides were not strikingly different from those of bare metal oxides except for the more pronounced impact on the mass loss accomplished by Ag/ZnO than by ZnO. Overall our study highlights that very low concentrations of NPs in freshwaters can impact freshwater ecosystem functioning.
Collapse
Affiliation(s)
- Aishwarya Jain
- MARE-Marine and Environmental Sciences Centre, Department of Life Sciences, University of Coimbra, Coimbra 3004-517, Portugal
| | - Santosh Kumar
- Department of Chemistry, University of Coimbra, Coimbra 3004-535, Portugal
| | - Sahadevan Seena
- MARE-Marine and Environmental Sciences Centre, Department of Life Sciences, University of Coimbra, Coimbra 3004-517, Portugal.
| |
Collapse
|
35
|
Noreen Z, Khalid NR, Abbasi R, Javed S, Ahmad I, Bokhari H. Visible light sensitive Ag/TiO 2/graphene composite as a potential coating material for control of Campylobacter jejuni. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 98:125-133. [PMID: 30813006 DOI: 10.1016/j.msec.2018.12.087] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Revised: 12/18/2018] [Accepted: 12/25/2018] [Indexed: 12/11/2022]
Abstract
Infectious diarrhea caused by the food borne pathogen, Campylobacter jejuni, is a major threat to public health worldwide leads high incidence of child mortality each year. In the present study, hydrothermal synthesis of Silver-Graphene-TiO2 nanocomposites along with TiO2, TiO2-Graphene and TiO2-silver nanocomposites was done and the samples were characterized using X-ray diffraction (XRD), tunneling electron microscopy (TEM) and UV-Vis Spectroscopy. Effect of silver and graphene addition on the broad spectrum antibacterial ability of TiO2 was studied under visible light. Moreover, the effects on bacterial survival, membrane integrity, cellular motiltiy and biofilm formation of C. jejuni were also evaluated. A synergetic effect of silver and graphene on Silver-Graphene-TiO2 nanocomposites was observed as indicated by its increased visible light sensitivity and enhanced antibacterial activity under visible light compared to its parent derivatives. Silver-Graphene-TiO2 composites effectively reduced growth and caused leakage of protein and DNA from C. jejuni cell. Atomic Force Microscopy was used to confirm bacterial cell damage. Besides, it also reduced motillity, hydrophobicity and autoaggregation of C. jejuni and showed excellent inhibition of biofilm formation. Furthermore, no significant cytotoxicity of synthesized nanoparticles was observed in human cell lines. We propose that Silver-Graphene-TiO2 composites can be used as effective antimicrobial agents to control the spread of C. jejuni by preventing both bacterial growth and biofilm formation.
Collapse
Affiliation(s)
- Zobia Noreen
- Department of Biosciences, COMSATS Institute of Information Technology, Islamabad, Pakistan
| | - N R Khalid
- Department of Physics, Faculty of Sciences, University of Gujrat, Gujrat, Pakistan.
| | - Rashda Abbasi
- Cancer Research, Institute of Biomedical and Genetic Engineering, Islamabad, Pakistan
| | - Sundus Javed
- Department of Biosciences, COMSATS Institute of Information Technology, Islamabad, Pakistan
| | - Imran Ahmad
- Department of Physics, Bahauddin Zakariya University, Multan, Pakistan
| | - Habib Bokhari
- Department of Biosciences, COMSATS Institute of Information Technology, Islamabad, Pakistan.
| |
Collapse
|
36
|
Chelli VR, Chakraborty S, Golder AK. Ag-doping on TiO2 using plant-based glycosidic compounds for high photonic efficiency degradative oxidation under visible light. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.08.140] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
37
|
Mechanistic investigation of visible light responsive Ag/ZnO micro/nanoflowers for enhanced photocatalytic performance and antibacterial activity. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2017.11.021] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
|
38
|
Bahadori E, Compagnoni M, Tripodi A, Freyria F, Armandi M, Bonelli B, Ramis G, Rossetti I. Photoreduction of nitrates from waste and drinking water. ACTA ACUST UNITED AC 2018. [DOI: 10.1016/j.matpr.2018.06.042] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
39
|
Din MI, Khalid R, Hussain Z. Minireview: Silver-Doped Titanium Dioxide and Silver-Doped Zinc Oxide Photocatalysts. ANAL LETT 2017. [DOI: 10.1080/00032719.2017.1363770] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
| | - Rida Khalid
- Institute of Chemistry, University of Punjab, Lahore, Pakistan
| | - Zaib Hussain
- Institute of Chemistry, University of Punjab, Lahore, Pakistan
| |
Collapse
|
40
|
Liu Y, Lang F, Dittrich T, Steigert A, Fischer CH, Köhler T, Plate P, Rappich J, Lux-Steiner MC, Schmid M. Enhancement of photocurrent in an ultra-thin perovskite solar cell by Ag nanoparticles deposited at low temperature. RSC Adv 2017. [DOI: 10.1039/c6ra25149h] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
22.2% relative enhancement of photocurrent in ultra-thin perovskite solar cells by one step incorporation of plasmonic silver nanoparticles.
Collapse
Affiliation(s)
- Yang Liu
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH
- 14109 Berlin
- Germany
- Freie Universität Berlin
- Institute of Chemistry and Biochemistry
| | - Felix Lang
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH
- 14109 Berlin
- Germany
| | - Thomas Dittrich
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH
- 14109 Berlin
- Germany
| | - Alexander Steigert
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH
- 14109 Berlin
- Germany
| | | | - Tristan Köhler
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH
- 14109 Berlin
- Germany
| | - Paul Plate
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH
- 14109 Berlin
- Germany
| | - Jörg Rappich
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH
- 14109 Berlin
- Germany
| | | | - Martina Schmid
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH
- 14109 Berlin
- Germany
- Freie Universität Berlin
- Department of Physics
| |
Collapse
|
41
|
Chang SY, Huang WJ, Lu BR, Fang GC, Chen Y, Chen HL, Chang MC, Hsu CF. An Environmentally Friendly Method for Testing Photocatalytic Inactivation of Cyanobacterial Propagation on a Hybrid Ag-TiO₂ Photocatalyst under Solar Illumination. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2015; 12:15819-33. [PMID: 26690465 PMCID: PMC4690959 DOI: 10.3390/ijerph121215023] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/03/2015] [Revised: 12/03/2015] [Accepted: 12/04/2015] [Indexed: 12/04/2022]
Abstract
Cyanobacteria were inactivated under sunlight using mixed phase silver (Ag) and deposited titanium dioxide (TiO₂) coated on the surface of diatomite (DM) as a hybrid photocatalyst (Ag-TiO₂/DM). The endpoints of dose-response experiments were chlorophyll a, photosynthetic efficiency, and flow cytometry measurements. In vitro experiments revealed that axenic cultures of planktonic cyanobacteria lost their photosynthetic activity following photocatalyzed exposure to sunlight for more than 24 h. Nearly 92% of Microcystis aeruginosa cells lost their photosynthetic activity, and their cell morphology was severely damaged within 24 h of the reaction. Preliminary carbon-14 ((14)CO₃(-2)) results suggest that the complete inactivation of cyanobacteria arises from damage to cell wall components (peroxidation). A small concomitant increase in cell wall disorder and a consequent decrease in cell wall functional groups increase the cell wall fluidity prior to cell lysis. A high dosage of Ag-TiO₂/DM during photocatalysis increased the concentration of extracellular polymeric substances (EPSs) in the Microcystis aeruginosa suspension by up to approximately 260%. However, photocatalytic treatment had a small effect on the disinfection by-product (DBP) precursor, as revealed by only a slight increase in the formation of trihalomethanes (THMs) and haloacetic acids (HAAs).
Collapse
Affiliation(s)
- Shu-Yu Chang
- Kuang-Tien General Hospital, No. 117, Satien Road, Shalu District, Taichung 43303, Taiwan.
| | - Winn-Jung Huang
- Department of Safety, Health and Environmental Engineering, Hungkuang University, No. 1018 Sec. 6, Taiwan Boulevard, Shalu District, Taichung 43302, Taiwan.
| | - Ben-Ren Lu
- Department of Electronics and Communication Engineering, Peking University, No. 5, Zhuangyuan Road, Binhu District, Wuxi 214125, China.
| | - Guor-Cheng Fang
- Department of Safety, Health and Environmental Engineering, Hungkuang University, No. 1018 Sec. 6, Taiwan Boulevard, Shalu District, Taichung 43302, Taiwan.
| | - Yeah Chen
- Department of Safety, Health and Environmental Engineering, Hungkuang University, No. 1018 Sec. 6, Taiwan Boulevard, Shalu District, Taichung 43302, Taiwan.
| | - Hsiu-Lin Chen
- Department of Safety, Health and Environmental Engineering, Hungkuang University, No. 1018 Sec. 6, Taiwan Boulevard, Shalu District, Taichung 43302, Taiwan.
| | - Ming-Chin Chang
- Department of Safety, Health and Environmental Engineering, Hungkuang University, No. 1018 Sec. 6, Taiwan Boulevard, Shalu District, Taichung 43302, Taiwan.
| | - Cheng-Feng Hsu
- Department of Safety, Health and Environmental Engineering, Hungkuang University, No. 1018 Sec. 6, Taiwan Boulevard, Shalu District, Taichung 43302, Taiwan.
| |
Collapse
|
42
|
Molea A, Popescu V, Rowson NA, Cojocaru I, Dinescu A, Dehelean A, Lazăr M. Correlation of Physicochemical Properties with the Catalytic Performance of Fe-Doped Titanium Dioxide Powders. Ind Eng Chem Res 2015. [DOI: 10.1021/acs.iecr.5b00246] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Andreia Molea
- Physics
and Chemistry Department, Faculty of Material and Environmental Engineering, Technical University of Cluj-Napoca, No. 103-105 Muncii Avenue, 400641 Cluj-Napoca, Romania
| | - Violeta Popescu
- Physics
and Chemistry Department, Faculty of Material and Environmental Engineering, Technical University of Cluj-Napoca, No. 103-105 Muncii Avenue, 400641 Cluj-Napoca, Romania
| | - Neil A. Rowson
- School
of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - Ileana Cojocaru
- University of Craiova, No. 13 Str.
Al. I. Cuza, 200585 Craiova, Romania
| | - Adrian Dinescu
- National Institute for Research and Development in Microtechnologies, 126A Erou Iancu Nicolae Street, 077190 Bucharest, Romania
| | - Adriana Dehelean
- National Institute for Research and Development of Isotopic and Molecular Technologies, 67-103 Donat, 400293 Cluj-Napoca, Romania
| | - Mihaela Lazăr
- National Institute for Research and Development of Isotopic and Molecular Technologies, 67-103 Donat, 400293 Cluj-Napoca, Romania
| |
Collapse
|