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Pino-Sandoval DA, Cantú-Cárdenas ME, Rodríguez-González V, Patrón-Soberano OA, Rosas-Castor JM, Murillo-Sierra JC, Hernández-Ramírez A. Solar heterogeneous photo-Fenton for complete inactivation of Escherichia coli and Salmonella typhimurium in secondary-treated wastewater effluent. CHEMOSPHERE 2023; 342:140132. [PMID: 37690560 DOI: 10.1016/j.chemosphere.2023.140132] [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: 04/09/2023] [Revised: 08/17/2023] [Accepted: 09/07/2023] [Indexed: 09/12/2023]
Abstract
In this work, complete elimination of Escherichia coli and Salmonella typhimurium was achieved in 120 min using a heterogeneous photo-Fenton process under sunlight at pH 6.5 in distilled water. A face-centered composite central design 22 with one categoric factor and three replicates at the central point was used to evaluate the effect of iron (III) oxide concentration (0.8-3.4 mg L-1), H2O2 (2-10 mg L-1), and the type of iron oxide phase (maghemite and hematite) on the inactivation of both bacteria. The results showed that the amount of catalyst, H2O2 concentration and their interaction were significant factors (p < 0.05) in the elimination of the microorganisms. Thus, under the best conditions (3.4 mg L-1 of iron (III) oxide and 10 mg L-1 of H2O2) in the experimental ranges, complete inactivation of E. coli and S. typhimurium was achieved (6-log reduction) in 120 min using the photo-Fenton treatment with both iron-oxide phases. Furthermore, the photocatalytic elimination of both bacteria by the photo-Fenton process using hematite and maghemite in secondary-treated wastewater effluent was performed obtaining slower inactivation rates (1.2-5.9 times) than in distilled water due to the matrix effect of the effluent from a wastewater treatment plant. Nevertheless, the process continued to be effective in the effluent, achieving complete bacterial elimination in 150 min using the hematite phase. Additionally, the SEM images of the bacterial cells showed that the heterogeneous photo-Fenton treatment generated permanent and irreversible cell damage, resulting in complete cell death.
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Affiliation(s)
- Diego A Pino-Sandoval
- Universidad Autónoma de Nuevo León, Facultad de Ciencias Químicas, Cd. Universitaria, San Nicolás de Los Garza, C.P. 66455, Nuevo León, Mexico; Universidad Politécnica de Apodaca, Av. Politécnica No. 2331, El Barretal, Apodaca, C. P. 66600, Nuevo León, Mexico
| | - M Elena Cantú-Cárdenas
- Universidad Autónoma de Nuevo León, Facultad de Ciencias Químicas, Cd. Universitaria, San Nicolás de Los Garza, C.P. 66455, Nuevo León, Mexico
| | - Vicente Rodríguez-González
- IPICyT, Instituto Potosino de Investigación Científica y Tecnológica, División de Biología Molecular, División de Materiales Avanzados, Camino a La Presa San José 2055, Lomas 4a. Sección, 78216, San Luis Potosí, S.L.P., Mexico
| | - O Araceli Patrón-Soberano
- IPICyT, Instituto Potosino de Investigación Científica y Tecnológica, División de Biología Molecular, División de Materiales Avanzados, Camino a La Presa San José 2055, Lomas 4a. Sección, 78216, San Luis Potosí, S.L.P., Mexico
| | - J Martín Rosas-Castor
- Universidad Autónoma de Nuevo León, Facultad de Ciencias Químicas, Cd. Universitaria, San Nicolás de Los Garza, C.P. 66455, Nuevo León, Mexico
| | - J Camilo Murillo-Sierra
- Facultad de Ciencias Químicas, Universidad de Concepción, Edmundo Larenas 129, Concepción, Chile
| | - Aracely Hernández-Ramírez
- Universidad Autónoma de Nuevo León, Facultad de Ciencias Químicas, Cd. Universitaria, San Nicolás de Los Garza, C.P. 66455, Nuevo León, Mexico.
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2
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Castillo-Seoane J, Contreras-Bernal L, Obrero-Perez JM, García-Casas X, Lorenzo-Lázaro F, Aparicio FJ, Lopez-Santos C, Rojas TC, Anta JA, Borrás A, Barranco Á, Sanchez-Valencia JR. Highly Anisotropic Organometal Halide Perovskite Nanowalls Grown by Glancing-Angle Deposition. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2107739. [PMID: 35077604 DOI: 10.1002/adma.202107739] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 12/23/2021] [Indexed: 06/14/2023]
Abstract
Polarizers are ubiquitous components in current optoelectronic devices as displays or photographic cameras. Yet, control over light polarization is an unsolved challenge, since the main drawback of the existing display technologies is the significant optical losses. In such a context, organometal halide perovskites (OMHP) can play a decisive role given their flexible synthesis with tunable optical properties such as bandgap and photoluminescence, and excellent light emission with a low non-radiative recombination rate. Therefore, along with their outstanding electrical properties have elevated hybrid perovskites as the material of choice in photovoltaics and optoelectronics. Among the different OMHP nanostructures, nanowires and nanorods have lately arisen as key players in the control of light polarization for lighting or detector applications. Herein, the fabrication of highly aligned and anisotropic methylammonium lead iodide perovskite nanowalls by glancing-angle deposition, which is compatible with most substrates, is presented. Their high alignment degree provides the samples with anisotropic optical properties such as light absorption and photoluminescence. Furthermore, their implementation in photovoltaic devices provides them with a polarization-sensitive response. This facile vacuum-based approach embodies a milestone in the development of last-generation polarization-sensitive perovskite-based optoelectronic devices such as lighting appliances or self-powered photodetectors.
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Affiliation(s)
- Javier Castillo-Seoane
- Institute of Materials Science of Seville (US-CSIC), Americo Vespucio 49, Seville, 41092, Spain
- Atomic, Nuclear and Molecular Physics Department, Facultad de Física, University of Seville, Avd. Reina Mercedes s/n, Seville, 41012, Spain
| | - Lidia Contreras-Bernal
- Institute of Materials Science of Seville (US-CSIC), Americo Vespucio 49, Seville, 41092, Spain
| | | | - Xabier García-Casas
- Institute of Materials Science of Seville (US-CSIC), Americo Vespucio 49, Seville, 41092, Spain
| | | | - Francisco Javier Aparicio
- Institute of Materials Science of Seville (US-CSIC), Americo Vespucio 49, Seville, 41092, Spain
- Department of Applied Physics I, University of Seville, Virgen de Africa, Seville, 41011, Spain
| | - Carmen Lopez-Santos
- Institute of Materials Science of Seville (US-CSIC), Americo Vespucio 49, Seville, 41092, Spain
- Department of Applied Physics I, University of Seville, Virgen de Africa, Seville, 41011, Spain
| | - Teresa Cristina Rojas
- Institute of Materials Science of Seville (US-CSIC), Americo Vespucio 49, Seville, 41092, Spain
| | - Juan Antonio Anta
- Área de Química Física, Universidad Pablo de Olavide, Seville, 41013, Spain
| | - Ana Borrás
- Institute of Materials Science of Seville (US-CSIC), Americo Vespucio 49, Seville, 41092, Spain
| | - Ángel Barranco
- Institute of Materials Science of Seville (US-CSIC), Americo Vespucio 49, Seville, 41092, Spain
| | - Juan Ramon Sanchez-Valencia
- Institute of Materials Science of Seville (US-CSIC), Americo Vespucio 49, Seville, 41092, Spain
- Atomic, Nuclear and Molecular Physics Department, Facultad de Física, University of Seville, Avd. Reina Mercedes s/n, Seville, 41012, Spain
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Prakruthi K, Ujwal MP, Yashas SR, Mahesh B, Kumara Swamy N, Shivaraju HP. Recent advances in photocatalytic remediation of emerging organic pollutants using semiconducting metal oxides: an overview. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:4930-4957. [PMID: 34797548 DOI: 10.1007/s11356-021-17361-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Accepted: 10/31/2021] [Indexed: 06/13/2023]
Abstract
Many untreated and partly treated wastewater from the home and commercial resources is being discharged into the aquatic environment these days, which contains numerous unknown and complex natural and inorganic compounds. These compounds tend to persist, initiating severe environmental problems, which affect human health. Conventionally, physicochemical treatment methods were adopted to remove such complex organic chemicals, but they suffer from critical limitations. Over time, photocatalysis, an advanced oxidation process, has gained its position for its efficient and fair performance against emerging organic pollutant decontamination. Typically, photocatalysis is a green technology to decompose organics under UV/visible light at ambient conditions. Semiconducting nanometal oxides have emerged as pioneering photocatalysts because of large active surface sites, flexible oxidation states, various morphologies, and easy preparation. The current review presents an overview of emerging organic pollutants and their effects, advanced oxidation processes, photocatalytic mechanism, types of photocatalysts, photocatalyst support materials, and methods for improving photodegradation efficiency on the degradation of complex emerging organic pollutants. In addition, the recent reports of metal-oxide-driven photocatalytic remediation of emerging organic pollutants are presented in brief. This review is anticipated to reach a broader scientific community to understand the first principles of photocatalysis and review the recent advancements in this field.
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Affiliation(s)
- Komargoud Prakruthi
- Department of Environmental Engineering, JSS Science and Technology University, Mysuru , 570006, India
| | | | - Shivamurthy Ravindra Yashas
- Department of Environmental Science, Faculty of Natural Science, JSS Academy of Higher Education and Research, Mysuru, 570015, India
| | - Basavaraju Mahesh
- Department of Chemistry, JSS Academy of Technical Education, Dr. Vishnuvardhan Road, Bengaluru, 560060, India
| | - Ningappa Kumara Swamy
- Department of Chemistry, JSS Science and Technology University, Mysuru, 570006, India.
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4
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Baldovi HG. Optimization of α-Fe 2O 3 Nanopillars Diameters for Photoelectrochemical Enhancement of α-Fe 2O 3-TiO 2 Heterojunction. NANOMATERIALS 2021; 11:nano11082019. [PMID: 34443850 PMCID: PMC8399771 DOI: 10.3390/nano11082019] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 07/28/2021] [Accepted: 08/05/2021] [Indexed: 01/30/2023]
Abstract
Global warming is pushing the world to seek to green energy sources and hydrogen is a good candidate to substitute fossil fuels in the short term. In future, it is expected that production of hydrogen will be carried out through photo-electrocatalysis. In this way, suitable electrodes that acts as photoanode absorbing the incident light are needed to catalyse water splitting reaction. Hematite (α-Fe2O3) is one of the most attractive semiconductors for this purpose since it is a low-cost material and it has a suitable band gap of 2.1 eV, which allows the absorption of the visible region. Although, hematite has drawbacks such as low carrier mobility and short holes diffusion lengths, that here it has been tried to overcome by nanoengineering the material, and by using a semiconductor as a scaffold that enhances charge carrier separation processes in the electrode. In this work, we fabricate ultrathin quasi transparent electrodes composed by highly ordered and self-standing hematite nanopillars of a few tens of nanometers length on FTO and TiO2 supports. Photoanodes were fabricated utilizing electron beam evaporation technique and anodized aluminum oxide templates with well-defined pores diameters. Thus, the activity of the compact layer hematite photoanode is compared with the photoanodes fabricated with nanopillars of controllable diameters (i.e., 90, 260 and 400 nm) to study their influence on charge separation processes. Results indicated that optimal α-Fe2O3 photoanodes performance are obtained when nanopillars reach hundreds of nanometers in diameter, achieving for photoanodes with 400 nm nanopillars onto TiO2 supports the highest photocurrent density values.
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Affiliation(s)
- Herme G Baldovi
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Philippa Fawcett Drive, Cambridge CB3 0AS, UK
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Ragab E, Shaban M, Khalek AA, Mohamed F. Design and characterization of PANI/starch/Fe 2O 3 bio composite for wastewater remediation. Int J Biol Macromol 2021; 181:301-312. [PMID: 33713774 DOI: 10.1016/j.ijbiomac.2021.03.043] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2020] [Revised: 03/08/2021] [Accepted: 03/09/2021] [Indexed: 02/07/2023]
Abstract
A new synthesized polyaniline/starch/hematite bio composite (PANI/S/Fe2O3 BC) has been studied as an effective material for on-site water remediation. PANI/S/Fe2O3 BC was developed by combining the techniques of co-precipitation and interfacial polymerization in the presence of aqueous starch solution in an acidic medium under ultrasonic irradiation. The nano-morphologies and structures of the designed PANI/S/Fe2O3 BC were evaluated by various techniques relative to PANI and Fe2O3 nanoparticles. In single and multiple systems, PANI/S/Fe2O3 BC was evaluated as a possible adsorbent for different heavy metals, including As3+, Zn2+, and Co2+, relative to PANI and Fe2O3 nanoparticles. In terms of pH value, operating temperature, initial heavy metal concentration, contact time, adsorbent dose and competitive ions in the solutions, the adsorption process was optimized. For 92% overall adsorption of Co2+ and 100% overall adsorption of both As3+ and Zn2+, the adsorption equilibrium was achieved within 60 and 120 min, respectively. In addition, adsorption thermodynamic analysis shows that the As3+ ions adsorption process was not random and the pseudo-second-order fitted with experimental results. Moreover, PANI/S/Fe2O3 BC was evaluated as an antibacterial agent against Gram-negative bacteria (Salmonella typhimurium) and Gram-positive bacteria (S. aureus, Methicillin-Resistant Staphylococcus, Aureus Clinical isolate and Bacillus subtilis). The reported performances indicated that the PANI/S/Fe2O3 BC is a potent candidate for industrial water bioremediation.
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Affiliation(s)
- Eman Ragab
- Nanophotonics and Applications (NPA) Lab, Physics Department, Faculty of Science, Beni-Suef University, Beni-Suef 62514, Egypt; Botany Department, Faculty of Science, Beni-Suef University, Beni-Suef 62514, Egypt
| | - Mohamed Shaban
- Nanophotonics and Applications (NPA) Lab, Physics Department, Faculty of Science, Beni-Suef University, Beni-Suef 62514, Egypt; Physics Department, Faculty of Science, Islamic University of Madinah, P. O. Box: 170, AlMadinah Almonawara 42351, Saudi Arabia
| | - Ahmed Abdel Khalek
- Chemistry Department, Faculty of Science, Beni-Suef University, Beni-Suef 62514, Egypt
| | - Fatma Mohamed
- Chemistry Department, Faculty of Science, Beni-Suef University, Beni-Suef 62514, Egypt; Nanophotonics and Applications (NPA) Lab, Physics Department, Faculty of Science, Beni-Suef University, Beni-Suef 62514, Egypt.
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6
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Liu X, Vonk D, Kisslinger K, Tong X, Halada G, Petrash S, Foster K, Chen-Wiegart YCK. Unraveling the Formation Mechanism of a Hybrid Zr-Based Chemical Conversion Coating with Organic and Copper Compounds for Corrosion Inhibition. ACS APPLIED MATERIALS & INTERFACES 2021; 13:5518-5528. [PMID: 33464806 DOI: 10.1021/acsami.0c19203] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Environmentally friendly chromate-free, zirconium (Zr)-based conversion coating is a promising green technology for corrosion protection. Additives in the surface treatment provide critical functionalities and performance improvements; however, mechanistic understanding as to how the additives influence the coatings remains unclear. In this study, a new organic-inorganic hybrid Zr-based conversion coating combines copper (Cu) compounds and polyamidoamine (PAMAM), taking advantage of the complementary nature of organic and inorganic additives. A multimodal approach combining electron and X-ray characterization is applied to study the interaction of Cu2+ and PAMAM and the resulting impacts on coating formation. Adding PAMAM changed the surface morphology, thickness, distribution of Cu in the clusters, and void formation of the coatings. High PAMAM (100-200 ppm) leads to little conversion coating formation, and low PAMAM (0-25 ppm) shows voids formation under the coatings. Moreover, PAMAM incorporates in the coating in the form of a PAMAM-Cu complex with a higher concentration toward the surface, providing an organic layer at the surface of the coating. X-ray absorption near-edge structure (XANES) spectroscopy shows the difference between the conventional and the hybrid coating treatments in an alkaline solution to simulate the E-coat process, suggesting the contribution of PAMAM in the enhanced chemical stability in an alkaline environment. Therefore, an intermediate range of addition of PAMAM (50 ppm) is optimal to (1) avoid excessive voids formation, (2) promote some Cu cluster formation and thus enhance the Zr-based coating formation, and (3) incorporate organic components into the coating to improve the adhesion of the subsequent coatings. Overall, this work furthers our knowledge on the formation mechanism of an effective and environmentally friendly hybrid conversion coating for corrosion inhibition, demonstrating a critical processing-structure-property relationship. This study will benefit future development of green and effective surface treatment technology.
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Affiliation(s)
- Xiaoyang Liu
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
| | - Donald Vonk
- Henkel Corporation, Madison Heights, Michigan 48071, United States
| | - Kim Kisslinger
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Xiao Tong
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Gary Halada
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
| | | | - Kate Foster
- Henkel Corporation, Madison Heights, Michigan 48071, United States
| | - Yu-Chen Karen Chen-Wiegart
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
- National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, New York 11973, United States
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7
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Zhu L, Pearson DW, Benoit SL, Xie J, Pant J, Yang Y, Mondal A, Handa H, Howe JY, Hung YC, Vidal JE, Maier RJ, Zhao Y. Highly Efficient Antimicrobial Activity of Cu xFe yO z Nanoparticles against Important Human Pathogens. NANOMATERIALS 2020; 10:nano10112294. [PMID: 33233512 PMCID: PMC7699552 DOI: 10.3390/nano10112294] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/24/2020] [Revised: 11/15/2020] [Accepted: 11/17/2020] [Indexed: 11/16/2022]
Abstract
The development of innovative antimicrobial materials is crucial in thwarting infectious diseases caused by microbes, as drug-resistant pathogens are increasing in both number and capacity to detoxify the antimicrobial drugs used today. An ideal antimicrobial material should inhibit a wide variety of bacteria in a short period of time, be less or not toxic to normal cells, and the fabrication or synthesis process should be cheap and easy. We report a one-step microwave-assisted hydrothermal synthesis of mixed composite CuxFeyOz (Fe2O3/Cu2O/CuO/CuFe2O) nanoparticles (NPs) as an excellent antimicrobial material. The 1 mg/mL CuxFeyOz NPs with the composition 36% CuFeO2, 28% Cu2O and 36% Fe2O3 have a general antimicrobial activity greater than 5 log reduction within 4 h against nine important human pathogenic bacteria (including drug-resistant bacteria as well as Gram-positive and Gram-negative strains). For example, they induced a >9 log reduction in Escherichia coli B viability after 15 min of incubation, and an ~8 log reduction in multidrug-resistant Klebsiella pneumoniae after 4 h incubation. Cytotoxicity tests against mouse fibroblast cells showed about 74% viability when exposed to 1 mg/mL CuxFeyOz NPs for 24 h, compared to the 20% viability for 1 mg/mL pure Cu2O NPs synthesized by the same method. These results show that the CuxFeyOz composite NPs are a highly efficient, low-toxicity and cheap antimicrobial material that has promising potential for applications in medical and food safety.
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Affiliation(s)
- Lu Zhu
- School of Chemical, Materials and Biomedical Engineering, College of Engineering, University of Georgia, Athens, GA 30602, USA; (L.Z.); (J.P.); (Y.Y.); (A.M.); (H.H.)
| | - David W. Pearson
- Department of Physics and Astronomy, University of Georgia, Athens, GA 30602, USA;
| | - Stéphane L. Benoit
- Department of Microbiology, University of Georgia, Athens, GA 30602, USA; (S.L.B.); (R.J.M.)
| | - Jing Xie
- Department of Food Science & Technology, University of Georgia, Griffin, GA 30223, USA; (J.X.); (Y.-C.H.)
| | - Jitendra Pant
- School of Chemical, Materials and Biomedical Engineering, College of Engineering, University of Georgia, Athens, GA 30602, USA; (L.Z.); (J.P.); (Y.Y.); (A.M.); (H.H.)
| | - Yanjun Yang
- School of Chemical, Materials and Biomedical Engineering, College of Engineering, University of Georgia, Athens, GA 30602, USA; (L.Z.); (J.P.); (Y.Y.); (A.M.); (H.H.)
| | - Arnab Mondal
- School of Chemical, Materials and Biomedical Engineering, College of Engineering, University of Georgia, Athens, GA 30602, USA; (L.Z.); (J.P.); (Y.Y.); (A.M.); (H.H.)
| | - Hitesh Handa
- School of Chemical, Materials and Biomedical Engineering, College of Engineering, University of Georgia, Athens, GA 30602, USA; (L.Z.); (J.P.); (Y.Y.); (A.M.); (H.H.)
| | - Jane Y. Howe
- Department of Materials Science & Engineering, University of Toronto, Toronto, ON M5S 1A1, Canada;
| | - Yen-Con Hung
- Department of Food Science & Technology, University of Georgia, Griffin, GA 30223, USA; (J.X.); (Y.-C.H.)
| | - Jorge E. Vidal
- Department of Microbiology and Immunology, University of Mississippi, Jackson, MS 39216, USA;
| | - Robert J. Maier
- Department of Microbiology, University of Georgia, Athens, GA 30602, USA; (S.L.B.); (R.J.M.)
| | - Yiping Zhao
- Department of Physics and Astronomy, University of Georgia, Athens, GA 30602, USA;
- Correspondence:
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8
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Abebe B, Zereffa EA, Tadesse A, Murthy HCA. A Review on Enhancing the Antibacterial Activity of ZnO: Mechanisms and Microscopic Investigation. NANOSCALE RESEARCH LETTERS 2020; 15:190. [PMID: 33001404 PMCID: PMC7530163 DOI: 10.1186/s11671-020-03418-6] [Citation(s) in RCA: 110] [Impact Index Per Article: 27.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Accepted: 09/21/2020] [Indexed: 05/27/2023]
Abstract
Metal oxide nanomaterials are one of the preferences as antibacterial active materials. Due to its distinctive electronic configuration and suitable properties, ZnO is one of the novel antibacterial active materials. Nowadays, researchers are making a serious effort to improve the antibacterial activities of ZnO by forming a composite with the same/different bandgap semiconductor materials and doping of ions. Applying capping agents such as polymers and plant extract that control the morphology and size of the nanomaterials and optimizing different conditions also enhance the antibacterial activity. Forming a nanocomposite and doping reduces the electron/hole recombination, increases the surface area to volume ratio, and also improves the stability towards dissolution and corrosion. The release of antimicrobial ions, electrostatic interaction, reactive oxygen species (ROS) generations are the crucial antibacterial activity mechanism. This review also presents a detailed discussion of the antibacterial activity improvement of ZnO by forming a composite, doping, and optimizing different conditions. The morphological analysis using scanning electron microscopy, field emission-scanning electron microscopy, field-emission transmission electron microscopy, fluorescence microscopy, and confocal microscopy can confirm the antibacterial activity and also supports for developing a satisfactory mechanism. Graphical abstract showing the metal oxides antibacterial mechanism and the fluorescence and scanning electron microscopic images.
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Affiliation(s)
- Buzuayehu Abebe
- Department of Applied Chemistry, School of Applied Natural Sciences, Adama Science and Technology University, P.O. Box: 1888, Adama, Ethiopia.
| | - Enyew Amare Zereffa
- Department of Applied Chemistry, School of Applied Natural Sciences, Adama Science and Technology University, P.O. Box: 1888, Adama, Ethiopia
| | - Aschalew Tadesse
- Department of Applied Chemistry, School of Applied Natural Sciences, Adama Science and Technology University, P.O. Box: 1888, Adama, Ethiopia
| | - H C Ananda Murthy
- Department of Applied Chemistry, School of Applied Natural Sciences, Adama Science and Technology University, P.O. Box: 1888, Adama, Ethiopia.
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9
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Abebe B, Murthy HCA, Zereffa EA, Adimasu Y. Synthesis and characterization of ZnO/PVA nanocomposites for antibacterial and electrochemical applications. INORG NANO-MET CHEM 2020. [DOI: 10.1080/24701556.2020.1814338] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Buzuayehu Abebe
- Department of Applied Chemistry, School of Applied Natural Sciences, Adama Science and Technology University, Adama, Ethiopia
| | - H C Ananda Murthy
- Department of Applied Chemistry, School of Applied Natural Sciences, Adama Science and Technology University, Adama, Ethiopia
| | - Enyew Amare Zereffa
- Department of Applied Chemistry, School of Applied Natural Sciences, Adama Science and Technology University, Adama, Ethiopia
| | - Yeshaneh Adimasu
- Department of Applied Biology, School of Applied Natural Sciences, Adama Science and Technology University, Adama, Ethiopia
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10
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An F, Zhou AF, Feng PX. Effect of Tungsten Oxide Nanostructures on Sensitivity and Selectivity of Pollution Gases. SENSORS 2020; 20:s20174801. [PMID: 32858789 PMCID: PMC7506700 DOI: 10.3390/s20174801] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Revised: 08/14/2020] [Accepted: 08/17/2020] [Indexed: 12/11/2022]
Abstract
We report on the different surface structures of tungsten oxides which have been synthesized using a simple post-annealing-free hot-filament CVD technique, including 0D nanoparticles (NPs), 1D nanorods (NRs), and 2D nanosheet assemblies of 3D hierarchical nanoflowers (NFs). The surface morphologies, crystalline structures, and material compositions have been characterized by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), and Raman spectroscopy, respectively. The sensor performances based on the synthesized samples of various surface morphologies have been investigated, as well as the influences of operating temperature and applied bias. The sensing property depends closely on the surface morphology, and the 3D hierarchical nanoflowers-based gas sensor offers the best sensitivity and fastest response time to NH3 and CH3 gases when operated at room temperature.
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Affiliation(s)
- Fenghui An
- School of Mechanical and Materials Engineering, Jiujiang University, Jiujiang 332005, China
- Department of Physics, University of Puerto Rico, San Juan, PR 00936, USA
- Correspondence: (F.A.); (P.X.F.)
| | - Andrew F. Zhou
- Department of Physics, Indiana University of Pennsylvania, Indiana, PA 15705, USA;
| | - Peter X. Feng
- Department of Physics, University of Puerto Rico, San Juan, PR 00936, USA
- Correspondence: (F.A.); (P.X.F.)
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11
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Affiliation(s)
- Rimzhim Gupta
- Department of Chemical EngineeringIndian Institute of Science Bangalore, Karnataka 560012 India
| | - Jayant Modak
- Department of Chemical EngineeringIndian Institute of Science Bangalore, Karnataka 560012 India
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12
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Qiao Y, Zhou X, Geng H, Sun L, Zhen D, Cai Q. β-NaYF 4:Yb,Er,Gd nanorods@1T/2H-MoS 2 for 980 nm NIR-triggered photocatalytic bactericidal properties. NEW J CHEM 2020. [DOI: 10.1039/d0nj00908c] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Fabrication of β-NaYF4:Yb,Er,Gd@1T/2H-MoS2 nanocomposites for NIR-driven photocatalytic sterilization of Escherichia coli.
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Affiliation(s)
- Yan Qiao
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha 410082
- China
| | - Xionglin Zhou
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha 410082
- China
| | - Hongchao Geng
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha 410082
- China
| | - Leilei Sun
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha 410082
- China
| | - Deshuai Zhen
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha 410082
- China
| | - Qingyun Cai
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha 410082
- China
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13
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Kaur A, Anderson WA, Tanvir S, Kansal SK. Solar light active silver/iron oxide/zinc oxide heterostructure for photodegradation of ciprofloxacin, transformation products and antibacterial activity. J Colloid Interface Sci 2019; 557:236-253. [PMID: 31521973 DOI: 10.1016/j.jcis.2019.09.017] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Revised: 09/02/2019] [Accepted: 09/04/2019] [Indexed: 02/07/2023]
Abstract
This paper reports on the multitasking potential of a silver/iron oxide/zinc oxide (Ag/Fe2O3/ZnO) heterostructure, which was used for the photocatalytic decomposition of ciprofloxacin (CPX) and bacterial disinfection. The Ag/Fe2O3/ZnO heterostructure was successfully prepared using a facile precipitation method, and characterization results showed interesting structural, morphological, compositional and luminescent properties. The morphological results of the prepared heterostructure confirmed the deposition of Ag nanoparticles onto the surface of ZnO nanoplates and Fe2O3 nanorods. Treatment studies showed that the Ag/Fe2O3/ZnO heterostructure had superior solar light driven photocatalytic activity towards CPX degradation (76.4%) compared to bare Fe2O3 nanorods (43.2%) and ZnO nanoplates (63.1%), Ag/Fe2O3 (28.2%) and Ag/ZnO (64.5%) under optimized conditions (initial CPX concentration: 10 mg/L; pH 4; catalyst loading: 0.3 g/L). Reactive species study confirmed the roles of e-, h+, OH and O2- in the photocatalytic degradation process. This photocatalytic behaviour of the Ag/Fe2O3/ZnO heterostructure could be attributed to the improved full solar spectrum harvesting capacity, separation of charge carriers and migration of e-/h+ across the heterostructure interface. In addition, the Ag/Fe2O3/ZnO heterostructure also showed good antibacterial activity against Escherichia coli (E. coli) under both dark and visible light conditions. This might be due to generation of reactive oxygen species during the reaction. To the best of our knowledge, this is the first study till date on the utilization of Ag/Fe2O3/ZnO heterostructure for the photocatalytic degradation of CPX and E. coli bacteria disinfection. Therefore, this work offers an attractive path to design ZnO-based ternary heterostructures for solar-driven applications in wastewater remediation.
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Affiliation(s)
- Amandeep Kaur
- Dr. S. S. Bhatnagar University Institute of Chemical Engineering and Technology, Panjab University, Chandigarh 160014, India
| | - William A Anderson
- Department of Chemical Engineering, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada
| | - Shazia Tanvir
- Department of Chemical Engineering, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada
| | - Sushil Kumar Kansal
- Dr. S. S. Bhatnagar University Institute of Chemical Engineering and Technology, Panjab University, Chandigarh 160014, India.
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14
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Antibacterial effects of carbon quantum dots@hematite nanostructures deposited on titanium against Gram-positive and Gram-negative bacteria. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2019.04.047] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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15
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Bhushan M, Kumar Y, Periyasamy L, Viswanath AK. Fabrication and a detailed study of antibacterial properties of α-Fe 2O 3/NiO nanocomposites along with their structural, optical, thermal, magnetic and cytotoxic features. NANOTECHNOLOGY 2019; 30:185101. [PMID: 30673650 DOI: 10.1088/1361-6528/ab0124] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Nanomaterials have specific properties which are uncommon in their bulk counterparts. Because of these unique characteristics, nanotechnology has been explored for various applications by the scientific community and it can play a crucial role in providing solutions of current major healthcare problems. In the present work, we describe the fabrication of a novel inorganic alternative of traditional antibiotics, which can effectively counter the pathogenic bacteria including multi drug resistant bacterial strains. For this purpose, nanocomposites of Fe/Ni oxide with different molar concentrations of nickel have been prepared via wet-chemical approach along with the α-Fe2O3 and NiO nanoparticles. The bactericidal efficiency of the prepared samples were tested against pathogenic strains of B. subtilis, S. aureus, E. coli and S. typhi using two distinct methods. In addition to this, structural, physical and chemical properties of the nanomaterials were studied using XRD, TEM, EDAX, Raman, VSM and TGA-DTA. Also, the cytotoxicity of synthesized samples was assessed using MTT assay against human cell lines MCF-10A (normal) and MCF7 (cancer).
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Affiliation(s)
- Mayank Bhushan
- Centre for Nanoscience and Technology, Pondicherry University, Puducherry-605014, India
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16
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Mechanisms of the Antibacterial Effects of TiO2–FeOx under Solar or Visible Light: Schottky Barriers versus Surface Plasmon Resonance. COATINGS 2018. [DOI: 10.3390/coatings8110391] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
This study reports the significant mechanistic difference between binary-oxide antibacterial films with the same composition but different microstructures. Binary TiO2-FeOx films were found to present a faster bacterial inactivation kinetics under visible light irradiation than each single oxide acting independently. The interaction between the film active surface species and the bacteria within the disinfection period was followed by X-ray photoelectron spectroscopy (XPS) and provided the evidence for a redox catalysis taking place during the bacterial inactivation time. The optical and surface properties of the films were evaluated by appropriate surface analytical methods. A differential mechanism is suggested for each specific microstructure inducing bacterial inactivation. The surface FeOx plasmon resonance transferred electrons into the conduction band of TiO2 because of the Schottky barrier after Fermi level equilibration of the two components. An electric field at the interface between TiO2 and FeOx, favors the separation of the photo-generated charges leading to a faster bacterial inactivation by TiO2–FeOx compared to the bacterial inactivation kinetics by each of the single oxides.
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17
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Taimoory SM, Rahdar A, Aliahmad M, Sadeghfar F, Hajinezhad MR, Jahantigh M, Shahbazi P, Trant JF. The synthesis and characterization of a magnetite nanoparticle with potent antibacterial activity and low mammalian toxicity. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.05.105] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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18
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Ahmed SN, Haider W. Heterogeneous photocatalysis and its potential applications in water and wastewater treatment: a review. NANOTECHNOLOGY 2018; 29:342001. [PMID: 29786601 DOI: 10.1088/1361-6528/aac6ea] [Citation(s) in RCA: 169] [Impact Index Per Article: 28.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
There has been a considerable amount of research in the development of sustainable water treatment techniques capable of improving the quality of water. Unavailability of drinkable water is a crucial issue especially in regions where conventional drinking water treatment systems fail to eradicate aquatic pathogens, toxic metal ions and industrial waste. The research and development in this area have given rise to a new class of processes called advanced oxidation processes, particularly in the form of heterogeneous photocatalysis, which converts photon energy into chemical energy. Advances in nanotechnology have improved the ability to develop and specifically tailor the properties of photocatalytic materials used in this area. This paper discusses many of those photocatalytic nanomaterials, both metal-based and metal-free, which have been studied for water and waste water purification and treatment in recent years. It also discusses the design and performance of the recently studied photocatalytic reactors, along with the recent advancements in the visible-light photocatalysis. Additionally, the effects of the fundamental parameters such as temperature, pH, catalyst-loading and reaction time have also been reviewed. Moreover, different techniques that can increase the photocatalytic efficiency as well as recyclability have been systematically presented, followed by a discussion on the photocatalytic treatment of actual wastewater samples and the future challenges associated with it.
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Affiliation(s)
- Syed Nabeel Ahmed
- School of Engineering & Technology, Central Michigan University, Mt. Pleasant, MI 48859, United States of America
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19
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Mirza AU, Kareem A, Nami SAA, Khan MS, Rehman S, Bhat SA, Mohammad A, Nishat N. Biogenic synthesis of iron oxide nanoparticles using Agrewia optiva and Prunus persica phyto species: Characterization, antibacterial and antioxidant activity. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2018; 185:262-274. [PMID: 29981488 DOI: 10.1016/j.jphotobiol.2018.06.009] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Revised: 06/08/2018] [Accepted: 06/20/2018] [Indexed: 10/28/2022]
Abstract
A phytoextract mediated synthesis of iron oxide nanoparticles using Agrewia optiva (Dhaman or Biul) and Prunus persica (Peach) leaf extract as capping and stabilizing agent without using hazardous toxic chemicals via biogenic route has been studied. The biogenic method of synthesis is convenient, rapid, cost effective and ecofriendly. The green synthesized nanoparticles were characterized by Ultraviolet-visible spectroscopy, Fourier transform infrared spectroscopy, Attenuated total reflectance spectroscopy, X-ray diffraction analysis, scanning electron microscopy, energy dispersive X-ray spectroscopy, transmission electron microscopy and dynamic light scattering measurements. The antibacterial study was determined by agar well diffusion method to measure the efficiency of both phyto species extract and its mediated iron oxide nanoparticles against five gram positive bacterial stains such as Staphylococcus aureus (S. aureus), Streptococcus mutans (S. mutans), Streptococcus pyrogenes (S. pyrogenes), Corynebacterium diphtheriae (C. diphtheriae) and Corynebacterium xerosis (C. xerosis) and three gram negative bacterial stains such as Escherichia coli (E. coli), Klebsiella pneuomoniae (K. pneuomoniae) and Pseudomonas aeruginosa (P. aeruginosa). The antibiotic Ciprofloxacin and Gentamicin have been used as reference standard drugs for gram positive and gram negative bacterial stains, respectively. The antioxidant activity of the phyto extracts and prepared nanoparticles have been performed using 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical assay employing l-ascorbic acid as a standard.
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Affiliation(s)
- Azar Ullah Mirza
- Material Research Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi 110025, India
| | - Abdul Kareem
- Material Research Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi 110025, India
| | - Shahab A A Nami
- Department of Kulliyat, Faculty of Unani Medicine, Aligarh Muslim University, Aligarh 202002, India
| | - Mohd Shoeb Khan
- Interdisciplinary Nanotechnology Centre, Aligarh Muslim University, Aligarh 202002, India
| | - Sumbul Rehman
- Department of Ilmul Advia, Faculty of Unani Medicine, Aligarh Muslim University, Aligarh 202002, India
| | - Shahnawaz Ahmad Bhat
- Material Research Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi 110025, India
| | - Abdulrahman Mohammad
- Material Research Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi 110025, India
| | - Nahid Nishat
- Material Research Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi 110025, India.
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20
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Liao A, He H, Tang L, Li Y, Zhang J, Chen J, Chen L, Zhang C, Zhou Y, Zou Z. Quasi-Topotactic Transformation of FeOOH Nanorods to Robust Fe 2O 3 Porous Nanopillars Triggered with a Facile Rapid Dehydration Strategy for Efficient Photoelectrochemical Water Splitting. ACS APPLIED MATERIALS & INTERFACES 2018; 10:10141-10146. [PMID: 29498822 DOI: 10.1021/acsami.8b00367] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
A facile rapid dehydration (RD) strategy is explored for quasi-topotactic transformation of FeOOH nanorods to robust Fe2O3 porous nanopillars, avoiding collapse, shrink, and coalescence, and compared with a conventional treatment route. Additionally, the so-called RD process is capable of generating a beneficial porous structure for photoelectrochemical water oxidation. The obtained RD-Fe2O3 photoanode exhibits a photocurrent density as high as 2.0 mA cm-2 at 1.23 V versus reversible hydrogen electrode (RHE) and a saturated photocurrent density of 3.5 mA cm-2 at 1.71 V versus RHE without any cocatalysts, which is about 270% improved photocurrent density over Fe2O3 with the conventional temperature-rising route (0.75 mA cm-2 at 1.23 V vs RHE and 1.48 mA cm-2 at 1.71 V vs RHE, respectively). The enhanced photocurrent on RD-Fe2O3 is attributed to a synergistic effect of the following factors: (i) preservation of single crystalline nanopillars decreases the charge-carrier recombination; (ii) formation of long nanopillars enhances light harvesting; and (iii) the porous structure shortens the hole transport distance from the bulk material to the electrode-electrolyte interface.
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Affiliation(s)
| | - Huichao He
- State Key Laboratory of Environmental Friendly Energy Materials, School of Materials Science and Engineering , Southwest University of Science and Technology , Mianyang , Sichuan 621010 , P. R. China
| | - Lanqin Tang
- College of Chemistry and Chemical Engineering , Yancheng Institute of Technology , Yancheng 22401 , P. R. China
| | | | - Jiyuan Zhang
- Sunlite Ltc, Kunshan Innovation Institute of Nanjing University , Kunshan , Jiangsu 215347 , P. R. China
| | - Jiani Chen
- State Key Laboratory for Mineral Deposits Research, School of Earth Sciences and Engineering , Nanjing University , Nanjing 210046 , P. R. China
| | | | | | - Yong Zhou
- Sunlite Ltc, Kunshan Innovation Institute of Nanjing University , Kunshan , Jiangsu 215347 , P. R. China
| | - Zhigang Zou
- College of Chemistry and Chemical Engineering , Yancheng Institute of Technology , Yancheng 22401 , P. R. China
- Sunlite Ltc, Kunshan Innovation Institute of Nanjing University , Kunshan , Jiangsu 215347 , P. R. China
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21
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Abstract
AbstractThe infectious diseases caused by various bacteria pose serious threat to human health. To solve this problem, antibacterial agents have been widely used in people’s daily life to deactivate or kill these bacteria. Among the antibacterial agents, ZnO is one of the most promising metal oxide antibacterial agents due to its non-toxic nature and safe properties. To expand its application, many composites of ZnO have been widely studied. Cellulose, as one of the most abundant biopolymers, has many merits like biodegradability, biocompatibility and low cost. Thus, many studies focus on synthesized cellulose/ZnO. The synthetic strategy includes both chemical and physical methods. Many of them have been shown that cellulose/ZnO composites have excellent antibacterial activity and are environment-friendly and have many applications for example food packing, antibacterial fibers and so on. This review mainly discusses the preparation methods of cellulose/ZnO and their effect on the morphology and properties.
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22
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Bhushan M, Kumar Y, Periyasamy L, Viswanath AK. Antibacterial applications of α-Fe2O3/Co3O4 nanocomposites and study of their structural, optical, magnetic and cytotoxic characteristics. APPLIED NANOSCIENCE 2018. [DOI: 10.1007/s13204-018-0656-5] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Abstract
Owing to their multiple mechanisms of bactericidal activity, inorganic metal oxides and hybrid metal oxide nanocomposites may serve as a new class of effective disinfectants. Among metal oxide nanoparticles, iron oxide nanoparticles exhibit minimal or no cytotoxicity to human cells with very efficient bactericidal properties over a wide spectrum of bacteria. This paper presents the very first report on antibacterial properties of novel nanocomposites of iron oxide and cobalt oxide nanoparticles against pathogenic bacterial strains B. subtilis, S. aureus, E.coli and S. typhi. The enhanced bactericidal activity of the Fe/Co oxide nanocomposite was the result of synergistic effect of iron oxide and cobalt oxide nanoparticles. The nanocomposites were synthesized using co-precipitation route with increasing cobalt content in the sample and further characterized using XRD, TEM, Raman and VSM to investigate structural, optical and magnetic properties of the prepared nanocomposites, respectively. Also, the prepared nanocomposites were highly biocompatible and found non-toxic to human cell line MCF7.
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23
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Fu W, Li G, Wang Y, Zeng S, Yan Z, Wang J, Xin S, Zhang L, Wu S, Zhang Z. Facile formation of mesoporous structured mixed-phase (anatase/rutile) TiO2 with enhanced visible light photocatalytic activity. Chem Commun (Camb) 2018; 54:58-61. [DOI: 10.1039/c7cc05750d] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new mesoporous anatase/rutile TiO2 nanocomposite was synthesized at a lower calcination temperature, and exhibited a higher visible light photocatalytic activity.
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Affiliation(s)
- Weiwei Fu
- Experimental Center
- Shenyang Normal University
- Shenyang 110034
- China
- State Key Laboratory of Inorganic Synthesis & Preparative Chemistry
| | - Guode Li
- Experimental Center
- Shenyang Normal University
- Shenyang 110034
- China
| | - Yu Wang
- State Key Laboratory of Inorganic Synthesis & Preparative Chemistry
- Jilin University
- Changchun 130012
- China
| | - Shangjing Zeng
- Key Laboratory of Synthetic Rubber
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130012
- China
| | - Zhuojun Yan
- College of Chemistry
- Liaoning University
- Shenyang 110036
- P. R. China
| | - Junwei Wang
- Experimental Center
- Shenyang Normal University
- Shenyang 110034
- China
| | - Shigang Xin
- Experimental Center
- Shenyang Normal University
- Shenyang 110034
- China
| | - Lei Zhang
- Experimental Center
- Shenyang Normal University
- Shenyang 110034
- China
| | - Shiwei Wu
- Experimental Center
- Shenyang Normal University
- Shenyang 110034
- China
| | - Zongtao Zhang
- State Key Laboratory of Inorganic Synthesis & Preparative Chemistry
- Jilin University
- Changchun 130012
- China
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24
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Li Y, Cheng YF. Photocatalytic anti-bioadhesion and bacterial deactivation on nanostructured iron oxide films. J Mater Chem B 2018; 6:1458-1469. [DOI: 10.1039/c7tb03242k] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Bacterial adhesion and biofilm formation on metals are a primary mechanism causing integrity degradation and failure of engineering structures. Photocatalytic iron oxide nano-films are effective for prevention of bioadhesion.
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Affiliation(s)
- Yuan Li
- Department of Mechanical & Manufacturing Engineering
- University of Calgary
- Calgary
- Canada
| | - Y. Frank Cheng
- Department of Mechanical & Manufacturing Engineering
- University of Calgary
- Calgary
- Canada
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25
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Chen S, Li Y, Cheng YF. Nanopatterning of steel by one-step anodization for anti-adhesion of bacteria. Sci Rep 2017; 7:5326. [PMID: 28706204 PMCID: PMC5509660 DOI: 10.1038/s41598-017-05626-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Accepted: 05/31/2017] [Indexed: 11/13/2022] Open
Abstract
Surface nanopatterning of metals has been an effective technique for improved performance and functionalization. However, it is of great challenge to fabricate nanostructure on carbon steels despite their extensive use and urgent needs to maintain the performance reliability and durability. Here, we report a one-step anodization technique to nanopattern a carbon steel in 50 wt.% NaOH solution for highly effective anti-adhesion by sulphate reducing bacteria (SRB), i.e., Desulfovibrio desulfuricans subsp. desulfuricans (Beijerinck) Kluyver and van Niel. We characterize the morphology, structure, composition, and surface roughness of the nanostructured film formed on the steel as a function of anodizing potential. We quantify the surface hydrophobicity by contact angle measurements, and the SRB adhesion by fluorescent analysis. The optimal anodization potential of 2.0 V is determined for the best performance of anti-adhesion of SRB to the steel, resulting in a 23.5 times of reduction of SRB adhesion compared to bare steel. We discuss the mechanisms for the film formation on the steel during anodization, and the high-performance anti-adhesion of bacteria to nanopatterned steels. Our technique is simple, cost-effective and environment-friendly, providing a promising alternative for industry-scale surface nanopatterning of carbon steels for effective controlling of bacterial adhesion.
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Affiliation(s)
- Shiqiang Chen
- Department of Mechanical & Manufacturing Engineering, University of Calgary, Calgary, Alberta, T2N 1N4, Canada
| | - Yuan Li
- Department of Mechanical & Manufacturing Engineering, University of Calgary, Calgary, Alberta, T2N 1N4, Canada
| | - Y Frank Cheng
- Department of Mechanical & Manufacturing Engineering, University of Calgary, Calgary, Alberta, T2N 1N4, Canada.
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26
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Evstropiev SK, Dukelskii KV, Karavaeva AV, Vasilyev VN, Kolobkova EV, Nikonorov NV, Evstropyev KS. Transparent bactericidal ZnO nanocoatings. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2017; 28:102. [PMID: 28534284 DOI: 10.1007/s10856-017-5909-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Accepted: 05/05/2017] [Indexed: 06/07/2023]
Abstract
Thin bactericidal ZnO coatings prepared with the polymer-salt method are shown to be highly transparent in the visible. The spectral measurements and XRD analysis data show that coatings prepared are formed by ZnO nanoparticles ~ 10 nm in size. The coatings demonstrate the bactericidal effect against the gram-positive Staphylococcus aureus ATCC 209P and gram-negative Escherichia coli ATCC 25922 bacteria both under the natural light and in the darkness.
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Affiliation(s)
- S K Evstropiev
- Saint-Petersburg National Research University ITMO, Saint-Petersburg, Kronverskii pr., 49,197101, Russia.
| | - K V Dukelskii
- Saint-Petersburg State Chemical-Pharmaceutical Academy, Saint-Petersburg, Russia
| | - A V Karavaeva
- The Bonch-Bruevich Saint-Petersburg State University of Telecommunications, Saint-Petersburg, Russia
| | | | - E V Kolobkova
- Saint-Petersburg National Research University ITMO, Saint-Petersburg, Kronverskii pr., 49,197101, Russia
| | - N V Nikonorov
- Saint-Petersburg National Research University ITMO, Saint-Petersburg, Kronverskii pr., 49,197101, Russia
| | - K S Evstropyev
- Saint-Petersburg National Research University ITMO, Saint-Petersburg, Kronverskii pr., 49,197101, Russia
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27
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Yemmireddy VK, Hung YC. Using Photocatalyst Metal Oxides as Antimicrobial Surface Coatings to Ensure Food Safety-Opportunities and Challenges. Compr Rev Food Sci Food Saf 2017; 16:617-631. [PMID: 33371565 DOI: 10.1111/1541-4337.12267] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Revised: 03/30/2017] [Accepted: 03/31/2017] [Indexed: 11/30/2022]
Abstract
Cross-contamination of foods with pathogenic microorganisms such as bacteria, viruses, and parasites may occur at any point in the farm to fork continuum. Food contact and nonfood contact surfaces are the most frequent source of microbial cross-contamination. In the wake of new and emerging food safety challenges, including antibiotic-resistant human pathogens, conventional sanitation and disinfection practices may not be sufficient to ensure safe food processing, proper preparation, and also not be environmentally friendly. Nanotechnology-enabled novel food safety interventions have a great potential to mitigate the risk of microbial cross-contamination in the food chain. Especially engineered nanoparticles (ENPs) are increasingly finding novel applications as antimicrobial agents. Among various ENPs, photocatalyst metal oxides have shown great promise as effective nontargeted disinfectants over a wide range of microorganisms. The present review provides an overview of antimicrobial properties of various photocatalyst metal oxides and their potential applications as surface coatings. Further, this review discusses the most common approaches to developing antimicrobial coatings, methods to characterize, test, and evaluate antimicrobial efficacy as well as the physical stability of the coatings. Finally, regulations and challenges concerning the use of these novel photocatalytic antimicrobial coatings are also discussed.
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Affiliation(s)
- Veerachandra K Yemmireddy
- Dept. of Food Science and Technology, Univ. of Georgia, 1109 Experiment Street, Griffin, Ga., 30223-1797, U.S.A
| | - Yen-Con Hung
- Dept. of Food Science and Technology, Univ. of Georgia, 1109 Experiment Street, Griffin, Ga., 30223-1797, U.S.A
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28
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Jana TK, Pal A, Mandal AK, Sarwar S, Chakrabarti P, Chatterjee K. Photocatalytic and Antibacterial Performance of α-Fe2
O3
Nanostructures. ChemistrySelect 2017. [DOI: 10.1002/slct.201700294] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- T. K. Jana
- Dept of Physics and Technophysics; Vidyasagar University; Midnapore - 721102 India
| | - A. Pal
- Dept of Physics and Technophysics; Vidyasagar University; Midnapore - 721102 India
| | - A. K. Mandal
- Chemical Biology Laboratory; Dept. of Sericulture; Raiganj University; Raiganj - 733134 India
| | - S. Sarwar
- Department of Biochemistry; Bose Institute; Kolkata 700054 India
| | - P. Chakrabarti
- Department of Biochemistry; Bose Institute; Kolkata 700054 India
| | - K. Chatterjee
- Dept of Physics and Technophysics; Vidyasagar University; Midnapore - 721102 India
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29
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Ren H, Koshy P, Chen WF, Qi S, Sorrell CC. Photocatalytic materials and technologies for air purification. JOURNAL OF HAZARDOUS MATERIALS 2017; 325:340-366. [PMID: 27932035 DOI: 10.1016/j.jhazmat.2016.08.072] [Citation(s) in RCA: 123] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Revised: 08/01/2016] [Accepted: 08/30/2016] [Indexed: 05/13/2023]
Abstract
Since there is increasing concern for the impact of air quality on human health, the present work surveys the materials and technologies for air purification using photocatalytic materials. The coverage includes (1) current photocatalytic materials for the decomposition of chemical contaminants and disinfection of pathogens present in air and (2) photocatalytic air purification systems that are used currently and under development. The present work focuses on five main themes. First, the mechanisms of photodegradation and photodisinfection are explained. Second, system designs for photocatalytic air purification are surveyed. Third, the photocatalytic materials used for air purification and their characteristics are considered, including both conventional and more recently developed photocatalysts. Fourth, the methods used to fabricate these materials are discussed. Fifth, the most significant coverage is devoted to materials design strategies aimed at improving the performance of photocatalysts for air purification. The review concludes with a brief consideration of promising future directions for materials research in photocatalysis.
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Affiliation(s)
- Hangjuan Ren
- School of Materials Science and Engineering, UNSW Australia, Sydney, NSW 2052, Australia.
| | - Pramod Koshy
- School of Materials Science and Engineering, UNSW Australia, Sydney, NSW 2052, Australia
| | - Wen-Fan Chen
- School of Materials Science and Engineering, UNSW Australia, Sydney, NSW 2052, Australia
| | - Shaohua Qi
- School of Materials Science and Engineering, UNSW Australia, Sydney, NSW 2052, Australia
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30
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Deng X, Wang C, Shao M, Xu X, Huang J. Low-temperature solution synthesis of CuO/Cu2O nanostructures for enhanced photocatalytic activity with added H2O2: synergistic effect and mechanism insight. RSC Adv 2017. [DOI: 10.1039/c6ra27634b] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The morphological transformation was observed after photodegradation and the as-grown samples exhibited relatively good durability as photocatalysts.
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Affiliation(s)
- Xiaolong Deng
- School of Physics and Technology
- University of Jinan
- Jinan
- People's Republic of China
| | - Chenggang Wang
- School of Physics and Technology
- University of Jinan
- Jinan
- People's Republic of China
| | - Minghui Shao
- School of Physics and Technology
- University of Jinan
- Jinan
- People's Republic of China
| | - Xijin Xu
- School of Physics and Technology
- University of Jinan
- Jinan
- People's Republic of China
| | - Jinzhao Huang
- School of Physics and Technology
- University of Jinan
- Jinan
- People's Republic of China
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31
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Larson S, Huang W, Zhao Y. Combinatorial fabrication of composite nanorods using oblique angle co-deposition. NANOTECHNOLOGY 2016; 27:365304. [PMID: 27485759 DOI: 10.1088/0957-4484/27/36/365304] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We demonstrate that oblique angle co-deposition can be used as a versatile combinatory nanofabrication technique to generate a library of nanomaterials. Using the Cu-Fe2O3 system as an example, by carefully characterizing the vapor plumes of the source materials, a composition map can be generated, which is used to design the locations of all the substrate holders. The resulting nanostructures at different locations show different thickness, morphology, crystallinity, composition, as well as inhomogeneity in microstructures, and material maps of all these structural parameters are established. By further oxidizing or reducing the composite nanostructures, their properties-such as band gap, photocatalytic performance, and magnetic properties-can be easily linked to their composition and other structural parameters. Optimal materials for photocatalytic and magnetic applications are efficiently identified. It is expected that oblique angle co-deposition and its variations could become the most powerful combinatory nanofabrication technique for nanomaterial survey.
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Affiliation(s)
- Steven Larson
- Department of Physics and Astronomy, University of Georgia, Athens, Georgia 30602
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32
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Sharma R, Uma, Singh S, Verma A, Khanuja M. Visible light induced bactericidal and photocatalytic activity of hydrothermally synthesized BiVO 4 nano-octahedrals. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2016; 162:266-272. [DOI: 10.1016/j.jphotobiol.2016.06.035] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Accepted: 06/10/2016] [Indexed: 11/30/2022]
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33
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Pan W, Huang Y, Cui S, Chen W, Mi L. Fabrication of CuS@Ni3S4- polyacrylonitrile textile fabric with enhanced reusability for the treatment of dyes wastewater. ChemistrySelect 2016. [DOI: 10.1002/slct.201600540] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Wei Pan
- Center For Advanced Materials Research; Zhongyuan University Of Technology; Henan 450007 P. R. China
| | - Yuanhui Huang
- Center For Advanced Materials Research; Zhongyuan University Of Technology; Henan 450007 P. R. China
| | - Shizhong Cui
- Center For Advanced Materials Research; Zhongyuan University Of Technology; Henan 450007 P. R. China
| | - Weihua Chen
- College of Chemistry and Molecular Engineering; Zhengzhou University; Zhengzhou 450001 P. R. China
| | - Liwei Mi
- Center For Advanced Materials Research; Zhongyuan University Of Technology; Henan 450007 P. R. China
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34
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35
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Larson S, Zhao Y. Tuning the composition of Bi x W y O nanorods towards zero bias PEC water splitting. NANOTECHNOLOGY 2016; 27:255401. [PMID: 27181626 DOI: 10.1088/0957-4484/27/25/255401] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A unique co-oblique angle deposition method was used to create nanorod arrays of mixed phase Bi2O3/WO3/Bi2WO6 with varying atomic ratios of Bi to W. The effect of the tuning on the resulting nanostructures was characterized by EDX, SEM, XRD, optical transmission, specular reflection, and diffuse reflection spectroscopy. Samples with different Bi:W atomic ratio had a wide range of morphology and composition due to the surface mobility of deposited bismuth and its volume expansion during oxidation. Their photocatalytic and photoelectrochemical properties were investigated by methylene blue degradation and photo-generated current respectively. The sample with 38 at.% Bi showed the highest photodecay rates as well as the maximum photocurrent density, 4.3 μA cm(-2), at a bias potential of 600 mV versus Ag/AgCl (3M KCl); while the sample with 50 at.% Bi exhibited a high photocurrent density of 0.35 μA cm(-2) at zero bias potential, which indicates that varying the composition and mixed crystal phases of different oxides with appropriate band gaps and locations could hold the key to a visible light driven, zero bias potential, photoelectrochemical cell.
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Affiliation(s)
- Steven Larson
- Department of Physics and Astronomy, University of Georgia, Athens, Georgia 30602, USA
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36
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Zhu L, Basnet P, Larson SR, Jones LP, Howe JY, Tripp RA, Zhao Y. Visible Light-Induced Photoeletrochemical and Antimicrobial Properties of Hierarchical CuBi2O4by Facile Hydrothermal Synthesis. ChemistrySelect 2016. [DOI: 10.1002/slct.201600164] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Lu Zhu
- College of Engineering; University of Georgia; Athens, GA 30602 USA
| | - Pradip Basnet
- Department of Physics and Astronomy; University of Georgia; Athens, GA 30602 USA
| | - Steven R. Larson
- Department of Physics and Astronomy; University of Georgia; Athens, GA 30602 USA
| | - Les P. Jones
- Department of Infectious Diseases; University of Georgia; Athens, GA 30602 USA
| | - Jane Y. Howe
- Hitachi High-Technologies Canada, Inc.; Toronto ON M5S 3E4 Canada
| | - Ralph A. Tripp
- Department of Infectious Diseases; University of Georgia; Athens, GA 30602 USA
| | - Yiping Zhao
- Department of Physics and Astronomy; University of Georgia; Athens, GA 30602 USA
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37
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Lewis CS, Torres L, Miyauchi JT, Rastegar C, Patete JM, Smith JM, Wong SS, Tsirka SE. Absence of Cytotoxicity towards Microglia of Iron Oxide (α-Fe 2O 3) Nanorhombohedra. Toxicol Res (Camb) 2016; 5:836-847. [PMID: 27274811 PMCID: PMC4890976 DOI: 10.1039/c5tx00421g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2015] [Accepted: 02/04/2016] [Indexed: 12/11/2022] Open
Abstract
Understanding the nature of interactions between nanomaterials, such as commercially ubiquitous hematite (α-Fe2O3) Nanorhombohedra (N-Rhomb) and biological systems is of critical importance for gaining insight into the practical applicability of nanomaterials. Microglia represent the first line of defense in the central nervous system (CNS) during severe injury or disease such as Parkinson's and Alzheimer's disease as illustrative examples. Hence, to analyze the potential cytotoxic effect of nanorhombohedra exposure in the presence of microglia, we have synthesized Rhodamine B (RhB) labeled-α-Fe2O3 N-Rhomb, with lengths of 47 ± 10 nm and widths of 35 ± 8 nm. Internalization of RhB labeled-α-Fe2O3 N-Rhomb by microglia in the mouse brain was observed, and a dose-dependent increase in the cellular iron content as probed by cellular fluorescence was detected in cultured microglia after nanoparticle exposure. The cells maintained clear functional viability, exhibiting little to no cytotoxic effects after 24 and 48 hours at acceptable, physiological concentrations. Importantly, the nanoparticle exposure did not induce microglial cells to produce either tumor necrosis factor alpha (TNFα) or interleukin 1-beta (IL1β), two pro-inflammatory cytokines, nor did exposure induce the production of nitrites and reactive oxygen species (ROS), which are common indicators for the onset of inflammation. Finally, we propose that under the conditions of our experiments, i.e. in the presence of RhB labeled-α-Fe2O3 N-Rhomb maintaining concentrations of up to 100 µg/mL after 48 hours of incubation, the in vitro and in vivo internalization of RhB labeled-α-Fe2O3 N-Rhomb are likely to be clathrin-dependent, which represents a conventional mechanistic uptake route for most cells. Given the crucial role that microglia play in many neurological disorders, understanding the potential cytotoxic effects of these nanostructures is of fundamental importance if they are to be used in a therapeutic setting.
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Affiliation(s)
- Crystal S. Lewis
- Department of Chemistry
, State University of New York at Stony Brook
,
Stony Brook
, New York 11794-3400
, USA
.
| | - Luisa Torres
- Department of Pharmacological Sciences
, State University of New York at Stony Brook
,
Stony Brook
, New York 11794-8651
, USA
.
| | - Jeremy T. Miyauchi
- Department of Pharmacological Sciences
, State University of New York at Stony Brook
,
Stony Brook
, New York 11794-8651
, USA
.
| | - Cyrus Rastegar
- Department of Pharmacological Sciences
, State University of New York at Stony Brook
,
Stony Brook
, New York 11794-8651
, USA
.
| | - Jonathan M. Patete
- Department of Chemistry
, State University of New York at Stony Brook
,
Stony Brook
, New York 11794-3400
, USA
.
| | - Jacqueline M. Smith
- Department of Chemistry
, State University of New York at Stony Brook
,
Stony Brook
, New York 11794-3400
, USA
.
| | - Stanislaus S. Wong
- Department of Chemistry
, State University of New York at Stony Brook
,
Stony Brook
, New York 11794-3400
, USA
.
- Condensed Matter Physics and Materials Science Department
, Building 480
, Brookhaven National Laboratory
,
Upton
, New York 11973
, USA
| | - Stella E. Tsirka
- Department of Pharmacological Sciences
, State University of New York at Stony Brook
,
Stony Brook
, New York 11794-8651
, USA
.
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38
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Patra AK, Kundu SK, Bhaumik A, Kim D. Morphology evolution of single-crystalline hematite nanocrystals: magnetically recoverable nanocatalysts for enhanced facet-driven photoredox activity. NANOSCALE 2016; 8:365-377. [PMID: 26616162 DOI: 10.1039/c5nr06509g] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
We have developed a new green chemical approach for the shape-controlled synthesis of single-crystalline hematite nanocrystals in aqueous medium. FESEM, HRTEM and SAED techniques were used to determine the morphology and crystallographic orientations of each nanocrystal and its exposed facets. PXRD and HRTEM techniques revealed that the nanocrystals are single crystalline in nature; twins and stacking faults were not detected in these nanocrystals. The structural, vibrational, and electronic spectra of these nanocrystals were highly dependent on their shape. Different shaped hematite nanocrystals with distinct crystallographic planes have been synthesized under similar reaction conditions, which can be desired as a model for the purpose of properties comparison with the nanocrystals prepared under different reaction conditions. Here we investigated the photocatalytic performance of these different shaped-nanocrystals for methyl orange degradation in the presence of white light (λ > 420 nm). In this study, we found that the density of surface Fe(3+) ions in particular facets was the key factor for the photocatalytic activity and was higher on the bitruncated-dodecahedron shape nanocrystals by coexposed {104}, {100} and {001} facets, attributing to higher catalytic activity. The catalytic activity of different exposed facet nanocrystals were as follows: {104} + {100} + {001} (bitruncated-dodecahedron) > {101} + {001} (bitruncated-octahedron) > {001} + {110} (nanorods) > {012} (nanocuboid) which provided the direct evidence of exposed facet-driven photocatalytic activity. The nanocrystals were easily recoverable using an external magnet and reused at least six times without significant loss of its catalytic activity.
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Affiliation(s)
- Astam K Patra
- School of Chemical Engineering, Sungkyunkwan University, Suwon, Kyunggi, 16419 Republic of Korea.
| | - Sudipta K Kundu
- Department of Materials Science, Indian Association for the Cultivation of Science, 2A & B, Raja S.C. Mullick Road, Jadavpur, Kolkata-700032, India.
| | - Asim Bhaumik
- Department of Materials Science, Indian Association for the Cultivation of Science, 2A & B, Raja S.C. Mullick Road, Jadavpur, Kolkata-700032, India.
| | - Dukjoon Kim
- School of Chemical Engineering, Sungkyunkwan University, Suwon, Kyunggi, 16419 Republic of Korea.
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39
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Abdul Rashid NM, Haw C, Chiu W, Khanis NH, Rohaizad A, Khiew P, Abdul Rahman S. Structural- and optical-properties analysis of single crystalline hematite (α-Fe2O3) nanocubes prepared by one-pot hydrothermal approach. CrystEngComm 2016. [DOI: 10.1039/c6ce00573j] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Time-dependent morphological evolution analysis shows high quality crystalline α-Fe2O3 nanocubes can be precisely tuned and synthesized by a facile, green, yet straightforward strategy via a hydrothermal method.
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Affiliation(s)
- Nur Maisarah Abdul Rashid
- Low Dimensional Materials Research Centre
- Department of Physics
- University of Malaya
- 50603 Kuala Lumpur, Malaysia
| | - Choonyian Haw
- Low Dimensional Materials Research Centre
- Department of Physics
- University of Malaya
- 50603 Kuala Lumpur, Malaysia
| | - Weesiong Chiu
- Low Dimensional Materials Research Centre
- Department of Physics
- University of Malaya
- 50603 Kuala Lumpur, Malaysia
| | - Noor Hamizah Khanis
- Low Dimensional Materials Research Centre
- Department of Physics
- University of Malaya
- 50603 Kuala Lumpur, Malaysia
| | - Aliff Rohaizad
- Low Dimensional Materials Research Centre
- Department of Physics
- University of Malaya
- 50603 Kuala Lumpur, Malaysia
| | - PoiSim Khiew
- Department of Chemical Engineering, Faculty of Engineering
- University of Nottingham Malaysia Campus
- 43500 Semenyih, Malaysia
| | - Saadah Abdul Rahman
- Low Dimensional Materials Research Centre
- Department of Physics
- University of Malaya
- 50603 Kuala Lumpur, Malaysia
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40
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Diaz C, Barrientos L, Carrillo D, Valdebenito J, Valenzuela ML, Allende P, Geaney H, O'Dwyer C. Solvent-less method for efficient photocatalytic α-Fe2O3 nanoparticles using macromolecular polymeric precursors. NEW J CHEM 2016. [DOI: 10.1039/c6nj00561f] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Efficient photocatalytic degradation of persistent cationic dye pollutants under visible light is possible with Fe2O3 nanoparticles formed by solvent-less synthesis using macromolecular precursor design.
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Affiliation(s)
- Carlos Diaz
- Departamento de Química
- Facultad de Ciencias
- Universidad de Chile
- Santiago de Chile
- Chile
| | - Lorena Barrientos
- Facultad de Química
- Centro de Investigación en Nanotecnología y Materiales Avanzados CIEN-UC
- Pontificia Universidad Católica de Chile
- Santiago de Chile
- Chile
| | - Daniel Carrillo
- Departamento de Química
- Facultad de Ciencias
- Universidad de Chile
- Santiago de Chile
- Chile
| | - Javier Valdebenito
- Departamento de Química
- Facultad de Ciencias
- Universidad de Chile
- Santiago de Chile
- Chile
| | - Maria L. Valenzuela
- Universidad Autonoma de Chile
- Institute of Applied Chemical Sciences
- Inorganic Chemistry and Molecular Materials Group
- Santiago
- Chile
| | - Patricio Allende
- Departamento de Química
- Facultad de Ciencias
- Universidad de Chile
- Santiago de Chile
- Chile
| | - Hugh Geaney
- Department of Chemistry
- University College Cork
- Cork
- Ireland
| | - Colm O'Dwyer
- Department of Chemistry
- University College Cork
- Cork
- Ireland
- Micro-Nano Systems Centre
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41
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Zhu L, Huang W, Rinehart ZS, Tam J, Zhao Y. Multifunctional iron oxide–carbon hybrid microrods. RSC Adv 2016. [DOI: 10.1039/c6ra19489c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
FexOy–C microrods with superior dye adsorption and drug loading abilities were obtained by solvothermal synthesis with annealing.
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Affiliation(s)
- Lu Zhu
- College of Engineering
- University of Georgia
- Athens
- USA
| | - Weijie Huang
- Department of Physics and Astronomy
- University of Georgia
- Athens
- USA
| | | | - Jason Tam
- Department of Materials Science and Engineering
- University of Toronto
- Toronto
- Canada
| | - Yiping Zhao
- Department of Physics and Astronomy
- University of Georgia
- Athens
- USA
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42
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Rufus A, N. S, Philip D. Synthesis of biogenic hematite (α-Fe2O3) nanoparticles for antibacterial and nanofluid applications. RSC Adv 2016. [DOI: 10.1039/c6ra20240c] [Citation(s) in RCA: 151] [Impact Index Per Article: 18.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
A novel approach for the synthesis of environmentally benign bioactive α-Fe2O3 nanoparticles capable of enhancing thermal conductivity.
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Affiliation(s)
- Alex Rufus
- Department of Physics
- Mar Ivanios College
- Thiruvananthapuram
- India
| | - Sreeju N.
- Department of Physics
- Mar Ivanios College
- Thiruvananthapuram
- India
| | - Daizy Philip
- Department of Physics
- Mar Ivanios College
- Thiruvananthapuram
- India
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43
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Basnet P, Zhao Y. Tuning the CuxO nanorod composition for efficient visible light induced photocatalysis. Catal Sci Technol 2016. [DOI: 10.1039/c5cy01464f] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Single and mixed phase Cu2O/CuO nanorod arrays prepared by thermal oxidation were tested for photocatalysis and photoelectrochemical properties.
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Affiliation(s)
- Pradip Basnet
- Department of Physics and Astronomy, and Nanoscale Science and Engineering Center
- University of Georgia
- Athens
- USA
| | - Yiping Zhao
- Department of Physics and Astronomy, and Nanoscale Science and Engineering Center
- University of Georgia
- Athens
- USA
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44
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Carraro G, Gasparotto A, Maccato C, Bontempi E, Barreca D. PECVD ofHematiteNanoblades and Nanocolumns: Synthesis, Characterization, and Growth Model. ACTA ACUST UNITED AC 2015. [DOI: 10.1002/cvde.201507182] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Giorgio Carraro
- Department of Chemistry; Padova University and INSTM; via Marzolo 1 35131 Padova Italy
| | - Alberto Gasparotto
- Department of Chemistry; Padova University and INSTM; via Marzolo 1 35131 Padova Italy
| | - Chiara Maccato
- Department of Chemistry; Padova University and INSTM; via Marzolo 1 35131 Padova Italy
| | - Elza Bontempi
- Chemistry for Technologies Laboratory; Brescia University; via Branze 38 25123 Brescia Italy
| | - Davide Barreca
- IENI-CNR and INSTM, Department of Chemistry; Padova University; via Marzolo 1 35131 Padova Italy
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45
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Gui X, Deng Y, Rui Y, Gao B, Luo W, Chen S, Nhan LV, Li X, Liu S, Han Y, Liu L, Xing B. Response difference of transgenic and conventional rice (Oryza sativa) to nanoparticles (γFe₂O₃). ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2015; 22:17716-23. [PMID: 26154040 DOI: 10.1007/s11356-015-4976-7] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Accepted: 06/29/2015] [Indexed: 05/06/2023]
Abstract
Nanoparticles (NPs) are an increasingly common contaminant in agro-environments, and their potential effect on genetically modified (GM) crops has been largely unexplored. GM crop exposure to NPs is likely to increase as both technologies develop. To better understand the implications of nanoparticles on GM plants in agriculture, we performed a glasshouse study to quantify the uptake of Fe2O3 NPs on transgenic and non-transgenic rice plants. We measured nutrient concentrations, biomass, enzyme activity, and the concentration of two phytohormones, abscisic acid (ABA) and indole-3-acetic acid (IAA), and malondialdehyde (MDA). Root phytohormone inhibition was positively correlated with Fe2O3 NP concentrations, indicating that Fe2O3 had a significant influence on the production of these hormones. The activities of antioxidant enzymes were significantly higher as a factor of low Fe2O3 NP treatment concentration and significantly lower at high NP concentrations, but only among transgenic plants. There was also a positive correlation between the treatment concentration of Fe2O3 and iron accumulation, and the magnitude of this effect was greatest among non-transgenic plants. The differences in root phytohormone production and antioxidant enzyme activity between transgenic and non-transgenic rice plants in vivo suggests that GM crops may react to NP exposure differently than conventional crops. It is the first study of NPs that may have an impact on GM crops, and a realistic significance for food security and food safety.
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Affiliation(s)
- Xin Gui
- College of Resources and Environmental Sciences, China Agricultural University, Yuanmingyuan West Road No.2, Haidian District, Beijing, China
| | - Yingqing Deng
- Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA, 01003, USA
| | - Yukui Rui
- College of Resources and Environmental Sciences, China Agricultural University, Yuanmingyuan West Road No.2, Haidian District, Beijing, China.
- Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA, 01003, USA.
| | - Binbin Gao
- College of Resources and Environmental Sciences, China Agricultural University, Yuanmingyuan West Road No.2, Haidian District, Beijing, China
| | - Wenhe Luo
- College of Resources and Environmental Sciences, China Agricultural University, Yuanmingyuan West Road No.2, Haidian District, Beijing, China
| | - Shili Chen
- College of Resources and Environmental Sciences, China Agricultural University, Yuanmingyuan West Road No.2, Haidian District, Beijing, China
| | - Le Van Nhan
- College of Resources and Environmental Sciences, China Agricultural University, Yuanmingyuan West Road No.2, Haidian District, Beijing, China
- Research Institute for Aquaculture No1, Tu Son, Bac Ninh, Vietnam
| | - Xuguang Li
- College of Resources and Environmental Sciences, China Agricultural University, Yuanmingyuan West Road No.2, Haidian District, Beijing, China
| | - Shutong Liu
- College of Resources and Environmental Sciences, China Agricultural University, Yuanmingyuan West Road No.2, Haidian District, Beijing, China
| | - Yaning Han
- College of Resources and Environmental Sciences, China Agricultural University, Yuanmingyuan West Road No.2, Haidian District, Beijing, China
| | - Liming Liu
- College of Resources and Environmental Sciences, China Agricultural University, Yuanmingyuan West Road No.2, Haidian District, Beijing, China
| | - Baoshan Xing
- Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA, 01003, USA
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46
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Photo–Fenton reaction in the presence of morphologically controlled hematite as iron source. J Photochem Photobiol A Chem 2015. [DOI: 10.1016/j.jphotochem.2015.04.009] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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47
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Parra-Barranco J, García-García FJ, Rico V, Borrás A, López-Santos C, Frutos F, Barranco A, González-Elipe AR. Anisotropic In-Plane Conductivity and Dichroic Gold Plasmon Resonance in Plasma-Assisted ITO Thin Films e-Beam-Evaporated at Oblique Angles. ACS APPLIED MATERIALS & INTERFACES 2015; 7:10993-11001. [PMID: 25938593 DOI: 10.1021/acsami.5b02197] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
ITO thin films have been prepared by electron beam evaporation at oblique angles (OA), directly and while assisting their growth with a downstream plasma. The films microstructure, characterized by scanning electron microscopy, atomic force microscopy, and glancing incidence small-angle X-ray scattering, consisted of tilted and separated nanostructures. In the plasma assisted films, the tilting angle decreased and the nanocolumns became associated in the form of bundles along the direction perpendicular to the flux of evaporated material. The annealed films presented different in-depth and sheet resistivity as confirmed by scanning conductivity measurements taken for the individual nanocolumns. In addition, for the plasma-assisted thin films, two different sheet resistance values were determined by measuring along the nanocolumn bundles or the perpendicular to it. This in-plane anisotropy induces the electrochemical deposition of elongated gold nanostructures. The obtained Au-ITO composite thin films were characterized by anisotropic plasmon resonance absorption and a dichroic behavior when examined with linearly polarized light.
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Affiliation(s)
- Julián Parra-Barranco
- †Nanotechnology on Surfaces Laboratory, Instituto de Ciencia de Materiales de Sevilla, Consejo Superior de Investigaciones Científicas (CSIC)-Universidad de Sevilla. c/Américo Vespucio 49, Sevilla 41092, Spain
| | - Francisco J García-García
- †Nanotechnology on Surfaces Laboratory, Instituto de Ciencia de Materiales de Sevilla, Consejo Superior de Investigaciones Científicas (CSIC)-Universidad de Sevilla. c/Américo Vespucio 49, Sevilla 41092, Spain
| | - Víctor Rico
- †Nanotechnology on Surfaces Laboratory, Instituto de Ciencia de Materiales de Sevilla, Consejo Superior de Investigaciones Científicas (CSIC)-Universidad de Sevilla. c/Américo Vespucio 49, Sevilla 41092, Spain
| | - Ana Borrás
- †Nanotechnology on Surfaces Laboratory, Instituto de Ciencia de Materiales de Sevilla, Consejo Superior de Investigaciones Científicas (CSIC)-Universidad de Sevilla. c/Américo Vespucio 49, Sevilla 41092, Spain
| | - Carmen López-Santos
- †Nanotechnology on Surfaces Laboratory, Instituto de Ciencia de Materiales de Sevilla, Consejo Superior de Investigaciones Científicas (CSIC)-Universidad de Sevilla. c/Américo Vespucio 49, Sevilla 41092, Spain
| | | | - Angel Barranco
- †Nanotechnology on Surfaces Laboratory, Instituto de Ciencia de Materiales de Sevilla, Consejo Superior de Investigaciones Científicas (CSIC)-Universidad de Sevilla. c/Américo Vespucio 49, Sevilla 41092, Spain
| | - Agustín R González-Elipe
- †Nanotechnology on Surfaces Laboratory, Instituto de Ciencia de Materiales de Sevilla, Consejo Superior de Investigaciones Científicas (CSIC)-Universidad de Sevilla. c/Américo Vespucio 49, Sevilla 41092, Spain
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48
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Byrne JA, Dunlop PSM, Hamilton JWJ, Fernández-Ibáñez P, Polo-López I, Sharma PK, Vennard ASM. A review of heterogeneous photocatalysis for water and surface disinfection. Molecules 2015; 20:5574-615. [PMID: 25830789 PMCID: PMC6272584 DOI: 10.3390/molecules20045574] [Citation(s) in RCA: 97] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2014] [Revised: 03/16/2015] [Accepted: 03/18/2015] [Indexed: 11/16/2022] Open
Abstract
Photo-excitation of certain semiconductors can lead to the production of reactive oxygen species that can inactivate microorganisms. The mechanisms involved are reviewed, along with two important applications. The first is the use of photocatalysis to enhance the solar disinfection of water. It is estimated that 750 million people do not have accessed to an improved source for drinking and many more rely on sources that are not safe. If one can utilize photocatalysis to enhance the solar disinfection of water and provide an inexpensive, simple method of water disinfection, then it could help reduce the risk of waterborne disease. The second application is the use of photocatalytic coatings to combat healthcare associated infections. Two challenges are considered, i.e., the use of photocatalytic coatings to give “self-disinfecting” surfaces to reduce the risk of transmission of infection via environmental surfaces, and the use of photocatalytic coatings for the decontamination and disinfection of medical devices. In the final section, the development of novel photocatalytic materials for use in disinfection applications is reviewed, taking account of materials, developed for other photocatalytic applications, but which may be transferable for disinfection purposes.
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Affiliation(s)
- John Anthony Byrne
- Nanotechnology and Integrated BioEngineering Centre, Ulster University, Newtownabbey, Northern Ireland BT37 0QB, UK.
| | - Patrick Stuart Morris Dunlop
- Nanotechnology and Integrated BioEngineering Centre, Ulster University, Newtownabbey, Northern Ireland BT37 0QB, UK.
| | - Jeremy William John Hamilton
- Nanotechnology and Integrated BioEngineering Centre, Ulster University, Newtownabbey, Northern Ireland BT37 0QB, UK.
| | | | | | - Preetam Kumar Sharma
- Nanotechnology and Integrated BioEngineering Centre, Ulster University, Newtownabbey, Northern Ireland BT37 0QB, UK.
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49
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Bhushan M, Muthukamalam S, Sudharani S, Viswanath AK. Synthesis of α-Fe2−xAgxO3nanocrystals and study of their optical, magnetic and antibacterial properties. RSC Adv 2015. [DOI: 10.1039/c4ra17259k] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
To be an implicit disinfectant, inorganic nanoparticles have to show chemical stability, minimum cytotoxicity and effective bactericidal activity.
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Affiliation(s)
- Mayank Bhushan
- Centre for Nanoscience and Technology
- Pondicherry University
- Puducherry-605014
- India
| | - S. Muthukamalam
- Department of Biochemistry and Molecular Biology
- Pondicherry University
- Puducherry-605014
- India
| | - S. Sudharani
- Department of Biochemistry and Molecular Biology
- Pondicherry University
- Puducherry-605014
- India
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50
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Guo T, Yao MS, Lin YH, Nan CW. A comprehensive review on synthesis methods for transition-metal oxide nanostructures. CrystEngComm 2015. [DOI: 10.1039/c5ce00034c] [Citation(s) in RCA: 191] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Recent developments of transition-metal oxide nanostructures with designed shape and dimensionality, including various synthesis methods and applications, are presented.
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Affiliation(s)
- Ting Guo
- State Key Lab of New Ceramics and Fine Processing
- School of Materials Science and Engineering
- Tsinghua University
- Beijing 100084, PR China
| | - Ming-Shui Yao
- State Key Laboratory of Structural Chemistry
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou, PR China
| | - Yuan-Hua Lin
- State Key Lab of New Ceramics and Fine Processing
- School of Materials Science and Engineering
- Tsinghua University
- Beijing 100084, PR China
| | - Ce-Wen Nan
- State Key Lab of New Ceramics and Fine Processing
- School of Materials Science and Engineering
- Tsinghua University
- Beijing 100084, PR China
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