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Tolaymat TM, El Badawy AM, Genaidy A, Scheckel KG, Luxton TP, Suidan M. An evidence-based environmental perspective of manufactured silver nanoparticle in syntheses and applications: a systematic review and critical appraisal of peer-reviewed scientific papers. THE SCIENCE OF THE TOTAL ENVIRONMENT 2010; 408:999-1006. [PMID: 19945151 DOI: 10.1016/j.scitotenv.2009.11.003] [Citation(s) in RCA: 389] [Impact Index Per Article: 27.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2009] [Revised: 10/20/2009] [Accepted: 11/02/2009] [Indexed: 05/18/2023]
Abstract
BACKGROUND Most recently, renewed interest has arisen in manufactured silver nanomaterials because of their unusually enhanced physicochemical properties and biological activities compared to the bulk parent materials. A wide range of applications has emerged in consumer products ranging from disinfecting medical devices and home appliances to water treatment. Because the hypothesized mechanisms that govern the fate and transport of bulk materials may not directly apply to materials at the nanoscale, there are great concerns in the regulatory and research communities about potential environmental impacts associated with the use of silver nanoparticles. In particular, the unlimited combinations of properties emerging from the syntheses and applications of silver nanoparticles are presenting an urgent need to document the predominant salt precursors, reducing agents and stabilizing agents utilized in the synthesis processes of silver nanoparticles to guide the massive efforts required for environmental risk assessment and management. OBJECTIVES The primary objective of this study is to present an evidence-based environmental perspective of silver nanoparticle properties in syntheses and applications. The following specific aims are designed to achieve the study objective: Aim 1--to document the salt precursors and agents utilized in synthesizing silver nanoparticles; Aim 2--to determine the characteristics of silver nanoparticles currently in use in the scientific literature when integrated in polymer matrices to form nanocomposites and combined with other metal nanoparticles to form bimetallic nanoparticles; Aim 3--to provide a summary of the morphology of silver nanoparticles; and (4) Aim 4--to provide an environmental perspective of the evidence presented in Aims 1 to 3. METHODS A comprehensive electronic search of scientific databases was conducted in support of the study objectives. Specific inclusion criteria were applied to gather the most pertinent research articles. Data and information extraction relied on the type of synthesis methods, that is, synthesized silver nanoparticles in general and specific applications, nanocomposites, and bimetallic techniques. The following items were gathered for: type of silver salt, solvent, reducing agent, stabilizing agent, size, and type of application/nanocomposite/bimetallic, and template (for nanocomposites). The description of evidence was presented in tabular format. The critical appraisal was analyzed in graphical format and discussed. RESULTS An analysis of the scientific literature suggests that most synthesis processes produce spherical silver nanoparticles with less than 20nm diameter. Silver nanoparticles are often synthesized via reduction of AgNO(3), dissolution in water, and utilization of reductants also acting as capping or stabilizing agents for the control of particle size to ensure a relatively stable suspension. Two of the most commonly used reductants and stabilizing agents are NaBH(4) and citrate which yield particles with a negative surface charge over the environmental pH range (3-10). The environmental perspectives of these parameters are discussed. CONCLUDING REMARKS It is expected that the antibacterial property of bulk silver is carried over and perhaps enhanced, to silver nanoparticles. Therefore, when one examines the environmental issues associated with the manufacture and use of silver nanoparticle-based products, the antibacterial effects should always be taken into account particularly at the different stages of the product lifecycle. Currently, there are two arguments in the scientific literature about the mechanisms of antimicrobial properties of silver nanoparticles as they relate to colloidal silver particles and inonic silver. Methodologies of risk assessment and control have to account for both arguments.
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Affiliation(s)
- Thabet M Tolaymat
- USEPA Office of Research and Development, National Risk Management Laboratory, 26 West Martin Luther King Drive, Cincinnati, OH 45224, United States.
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Yan S, Lee SJ, Kang S, Lee JY. Computational Approaches in Molecular Recognition, Self-assembly, Electron Transport, and Surface Chemistry. Supramol Chem 2007. [DOI: 10.1080/10610270701261547] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Shihai Yan
- a Department of Chemistry , Sungkyunkwan University , Suwon, 440-746, South Korea
| | - Sang Joo Lee
- b Korea Institute of Science and Technology Information, Center for Computational Biology and Bioinformatics , 52, Eoeun-dong, Yuseong, Daejeon, 305-806, South Korea
| | - Sunwoo Kang
- a Department of Chemistry , Sungkyunkwan University , Suwon, 440-746, South Korea
| | - Jin Yong Lee
- a Department of Chemistry , Sungkyunkwan University , Suwon, 440-746, South Korea
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Sawayama YS, Shibahara H, Ichihashi Y, Nishiyama S, Tsuruya S. Promoting Effect and Role of Alkaline Earth Metal Added to Supported Ag Catalysts in the Gas-Phase Catalytic Oxidation of Benzyl Alcohol. Ind Eng Chem Res 2006. [DOI: 10.1021/ie061091x] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yo-suke Sawayama
- Department of Chemical Science and Engineering, Graduate School of Science and Technology, Kobe University, Rokkodai, Nada, Kobe 657-8501, Japan, Department of Chemical Science and Engineering, Faculty of Engineering, Kobe University, Nada, Kobe 657-8501, Japan, and Environmental Management Center, Kobe University, Rokkodai, Nada, Kobe 657-8501, Japan
| | - Hiroshi Shibahara
- Department of Chemical Science and Engineering, Graduate School of Science and Technology, Kobe University, Rokkodai, Nada, Kobe 657-8501, Japan, Department of Chemical Science and Engineering, Faculty of Engineering, Kobe University, Nada, Kobe 657-8501, Japan, and Environmental Management Center, Kobe University, Rokkodai, Nada, Kobe 657-8501, Japan
| | - Yuichi Ichihashi
- Department of Chemical Science and Engineering, Graduate School of Science and Technology, Kobe University, Rokkodai, Nada, Kobe 657-8501, Japan, Department of Chemical Science and Engineering, Faculty of Engineering, Kobe University, Nada, Kobe 657-8501, Japan, and Environmental Management Center, Kobe University, Rokkodai, Nada, Kobe 657-8501, Japan
| | - Satoru Nishiyama
- Department of Chemical Science and Engineering, Graduate School of Science and Technology, Kobe University, Rokkodai, Nada, Kobe 657-8501, Japan, Department of Chemical Science and Engineering, Faculty of Engineering, Kobe University, Nada, Kobe 657-8501, Japan, and Environmental Management Center, Kobe University, Rokkodai, Nada, Kobe 657-8501, Japan
| | - Shigeru Tsuruya
- Department of Chemical Science and Engineering, Graduate School of Science and Technology, Kobe University, Rokkodai, Nada, Kobe 657-8501, Japan, Department of Chemical Science and Engineering, Faculty of Engineering, Kobe University, Nada, Kobe 657-8501, Japan, and Environmental Management Center, Kobe University, Rokkodai, Nada, Kobe 657-8501, Japan
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Tan H, Li S, Fan WY. Core−Shell and Hollow Nanocrystal Formation via Small Molecule Surface Photodissociation; Ag@Ag2Se as an Example. J Phys Chem B 2006; 110:15812-6. [PMID: 16898730 DOI: 10.1021/jp0616011] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Metallic Ag nanoparticles have been converted to Ag2Se nanoparticles at ambient temperature and open atmosphere by UV photodissociation of adsorbed CSe2 on the Ag core surface. The photolysis could be prevented at any stage yielding Ag@Ag2Se core-shell structures of different thickness. Depending on the initial Ag nanoparticle size, either hollow or filled nanocrystals of Ag2Se could be prepared. The Kirkendall effect has been proposed to account for the formation of hollow nanoparticles. A coated-sphere Drude model has been used to explain the redshift of the Ag plasmon band as a function of the Ag2Se shell thickness as well as to provide the first estimates of the wavelength-dependent dielectric function of Ag2Se. This photochemical method might be especially promising for carrying out a direct room-temperature phototransformation of metallic into semiconductor nanostructures already assembled on surface templates.
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Affiliation(s)
- Hua Tan
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543
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Park HJ, Kwon OH, Ah CS, Jang DJ. Excited-State Tautomerization Dynamics of 7-Hydroxyquinoline in β-Cyclodextrin. J Phys Chem B 2005; 109:3938-43. [PMID: 16851447 DOI: 10.1021/jp046817m] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The excited-state tautomerization dynamics of 7-hydroxyquinoline encapsulated in beta-cyclodextrin is compared with that in pure water by measuring isotope-dependent fluorescence kinetics as well as absorption and emission spectra. The normal species tautomerizes stepwise via forming anionic intermediate species in both systems. However, the enol-deprotonation time (40 ps in water) becomes as large as 170 ps whereas the imine-protonation time of the anionic intermediate (160 ps in water) becomes as short as 85 ps in beta-cyclodextrin. The slow formation and the fast decay of the anionic species are attributed to the unstability of the charged species in hydrophobic cages. Encapsulation can be utilized to enhance fluorescence enormously and to accelerate selective reactions by retarding other processes.
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Affiliation(s)
- Han Jung Park
- School of Chemistry, Seoul National University, NS60, Seoul 151-742, Korea
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Yu H, Kwon OH, Jang DJ. Migration of Protons during the Excited-State Tautomerization of Aqueous 3-Hydroxyquinoline. J Phys Chem A 2004. [DOI: 10.1021/jp031293w] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hyunung Yu
- School of Chemistry, Seoul National University, NS60, Seoul 151-742, Korea
| | - Oh-Hoon Kwon
- School of Chemistry, Seoul National University, NS60, Seoul 151-742, Korea
| | - Du-Jeon Jang
- School of Chemistry, Seoul National University, NS60, Seoul 151-742, Korea
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Kim KL, Lee SJ, Kim K. Surface-Enhanced Raman Scattering of Benzyl Phenyl Sulfide in Silver Sol: Excitation-Wavelength-Dependent Surface-Induced Photoreaction. J Phys Chem B 2004. [DOI: 10.1021/jp049244m] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kyung Lock Kim
- Laboratory of Intelligent Interfaces, School of Chemistry and Molecular Engineering, Seoul National University, Seoul 151-742, Korea
| | - Seung Joon Lee
- Laboratory of Intelligent Interfaces, School of Chemistry and Molecular Engineering, Seoul National University, Seoul 151-742, Korea
| | - Kwan Kim
- Laboratory of Intelligent Interfaces, School of Chemistry and Molecular Engineering, Seoul National University, Seoul 151-742, Korea
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