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Aqeel T, Abdullah HN. Direct one-step synthesis of mesoporous ZnO-silicate matrix using a true liquid crystal method. MAIN GROUP CHEMISTRY 2018. [DOI: 10.3233/mgc-180266] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Tariq Aqeel
- Department of Science, College of Basic Education, the Public Authority of Applied Education and Training (PAAET) Kuwait, Safat, Kuwait
| | - Haifaa N. Abdullah
- Department of Laboratories – Applied Chemistry, College of Technological Studies, (PAAET) Kuwait
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2
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Changes within the stabilizing layer of ZnO nanoparticles upon washing. J Colloid Interface Sci 2017; 504:356-362. [PMID: 28582753 DOI: 10.1016/j.jcis.2017.05.059] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Revised: 05/17/2017] [Accepted: 05/18/2017] [Indexed: 10/19/2022]
Abstract
ZnO nanoparticles (NPs) are highly relevant for various industrial applications, however, after synthesis of the NPs residual chemicals need to be removed from the colloidal raw product by washing, as they may influence the performance of the final device. In the present study we focus on the effect of washing by antisolvent flocculation with subsequent redispersion of the NPs on the stabilizing acetate shell. Purification of the ZnO nanoparticles is reported to be optimal with respect to zeta potential that has a maximum after one washing cycle. In this work, we will shed light on this observation using small angle X-ray and neutron scattering (SAXS, SANS) by demonstrating that after the first washing cycle the content of acetate in the ligand shell around the ZnO NPs increases. In detail, it was observed that the diffuse acetate shell shrinks to the size of a monolayer upon washing but the acetate content of this monolayer is higher than within the diffuse shell of the particles of the native dispersion. A second washing cycle reduces the acetate concentration within the stabilizing shell and the stability of the dispersion drops accordingly. After another (third) washing cycle strong agglomeration was observed for all investigated samples.
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Kim M, Kim Y, Kwon W, Yoon S. Water as an agent for the morphology modification of metal oxalate materials on the nanoscale: from sheets to rods. Sci Rep 2016; 6:19282. [PMID: 26763973 PMCID: PMC4725861 DOI: 10.1038/srep19282] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2015] [Accepted: 12/02/2015] [Indexed: 11/20/2022] Open
Abstract
A number of approaches have been used to control the shape of metal oxalates, which often used as precursors for metal oxide nanomaterials. However, attempts to use water as a regulator have not been reported. Here in we report systematic studies on related topics: nanosheets, composed of 1-dimensional [M(C2O4)(EG)] (M = Zn or Co) polymeric structure, could be transformed into nanorods by using water as a shape-shifting agent because water can readily substitute EG ligand, leading alternation of inter-chain hydrogen bonding interactions. In addition, heat-treatment of these nanomaterials with diverse morphologies resulted in porous metal oxides with high degrees of shape retention.
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Affiliation(s)
- Minog Kim
- Department of Bio & Nano Chemistry, Kookmin University, 861-1 Jeongneung-dong, Seongbuk-gu, Seoul 136-702, Republic of Korea
| | - YooJin Kim
- Engineering Ceramic Center, Korea Institute of Ceramic Engineering and Technology, Icheon 467-843, Republic of Korea
| | - WonJong Kwon
- LG Chem Research Park, 104-1 Moonji-dong, Yuseong-gu Daejeon 305-380, Republic of Korea
| | - Sungho Yoon
- Department of Bio & Nano Chemistry, Kookmin University, 861-1 Jeongneung-dong, Seongbuk-gu, Seoul 136-702, Republic of Korea
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Schindler T, Walter J, Peukert W, Segets D, Unruh T. In Situ Study on the Evolution of Multimodal Particle Size Distributions of ZnO Quantum Dots: Some General Rules for the Occurrence of Multimodalities. J Phys Chem B 2015; 119:15370-80. [PMID: 26550985 DOI: 10.1021/acs.jpcb.5b08005] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Properties of small semiconductor nanoparticles (NPs) are strongly governed by their size. Precise characterization is a key requirement for tailored dispersities and thus for high-quality devices. Results of a careful analysis of particle size distributions (PSDs) of ZnO are presented combining advantages of UV/vis absorption spectroscopy, analytical ultracentrifugation, and small-angle X-ray scattering (SAXS). Our study reveals that careful cross-validation of these different methods is mandatory to end up with reliable resolution. PSDs of ZnO NPs are multimodal on a size range of 2-8 nm, a finding that is not yet sufficiently addressed. In the second part of our work the evolution of PSDs was studied using in situ SAXS. General principles for the appearance of multimodalities covering a temperature range between 15 and 45 °C were found which are solely determined by the aging state indicated by the size of the medium-sized fraction. Whenever this fraction exceeds a critical diameter, a new multimodality is identified, independent of the particular time-temperature combination. A fraction of larger particles aggregates first before a fraction of smaller particles is detected. Fixed multimodalities have not yet been addressed adequately and could only be evidenced due to careful size analysis.
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Affiliation(s)
- Torben Schindler
- Chair of Crystallography and Structural Physics and ‡Institute of Particle Technology (LFG), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) , 91058 Erlangen, Germany
| | - Johannes Walter
- Chair of Crystallography and Structural Physics and ‡Institute of Particle Technology (LFG), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) , 91058 Erlangen, Germany
| | - Wolfgang Peukert
- Chair of Crystallography and Structural Physics and ‡Institute of Particle Technology (LFG), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) , 91058 Erlangen, Germany
| | - Doris Segets
- Chair of Crystallography and Structural Physics and ‡Institute of Particle Technology (LFG), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) , 91058 Erlangen, Germany
| | - Tobias Unruh
- Chair of Crystallography and Structural Physics and ‡Institute of Particle Technology (LFG), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) , 91058 Erlangen, Germany
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Khan A, Zada A, Humayun M. Physicochemical Interaction of ZnO Fine Particles with 5-Mono-(4-carboxyphenyl)-10,15,20-Triphenylporphyrin. J CHIN CHEM SOC-TAIP 2015. [DOI: 10.1002/jccs.201400190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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6
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Schindler T, Schmiele M, Schmutzler T, Kassar T, Segets D, Peukert W, Radulescu A, Kriele A, Gilles R, Unruh T. A Combined SAXS/SANS Study for the in Situ Characterization of Ligand Shells on Small Nanoparticles: The Case of ZnO. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:10130-10136. [PMID: 26327573 DOI: 10.1021/acs.langmuir.5b02198] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
ZnO nanoparticles (NPs) have great potential for their use in, e.g., thin film solar cells due to their electro-optical properties adjustable on the nanoscale. Therefore, the production of well-defined NPs is of major interest. For a targeted production process, the knowledge of the stabilization layer of the NPs during and after their formation is of particular importance. For the study of the stabilizer layer of ZnO NPs prepared in a wet chemical synthesis from zinc acetate, only ex situ studies have been performed so far. An acetate layer bound to the surface of the dried NPs was found; however, an in situ study which addresses the stabilizing layer surrounding the NPs in a native dispersion was missing. By the combination of small angle scattering with neutrons and X-rays (SANS and SAXS) for the same sample, we are now able to observe the acetate shell in situ for the first time. In addition, the changes of this shell could be followed during the ripening process for different temperatures. With increasing size of the ZnO core (d(core)) the surrounding shell (d(shell)) becomes larger, and the acetate concentration within the shell is reduced. For all samples, the shell thickness was found to be larger than the maximum extension of an acetate molecule with acetate concentrations within the shell below 50 vol %. Thus, there is not a monolayer of acetate molecules that covers the NPs but rather a swollen shell of acetate ions. This shell is assumed to hinder the growth of the NPs to larger macrostructures. In addition, we found that the partition coefficient μ between acetate in the shell surrounding the NPs and the total amount of acetate in the solution is about 10% which is in good agreement with ex situ data determined by thermogravimetric analysis.
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Affiliation(s)
- T Schindler
- Chair of Crystallography and Structural Physics, Friedrich-Alexander-Universät Erlangen-Nürnberg , Staudtstraße 3, 91058 Erlangen, Germany
| | - M Schmiele
- Chair of Crystallography and Structural Physics, Friedrich-Alexander-Universät Erlangen-Nürnberg , Staudtstraße 3, 91058 Erlangen, Germany
| | - T Schmutzler
- Chair of Crystallography and Structural Physics, Friedrich-Alexander-Universät Erlangen-Nürnberg , Staudtstraße 3, 91058 Erlangen, Germany
| | - T Kassar
- Chair of Crystallography and Structural Physics, Friedrich-Alexander-Universät Erlangen-Nürnberg , Staudtstraße 3, 91058 Erlangen, Germany
| | - D Segets
- Institute of Particle Technology, Friedrich-Alexander-Universät Erlangen-Nürnberg , Cauerstraße 4, 91058 Erlangen, Germany
| | - W Peukert
- Institute of Particle Technology, Friedrich-Alexander-Universät Erlangen-Nürnberg , Cauerstraße 4, 91058 Erlangen, Germany
| | - A Radulescu
- Forschungszentrum Jülich GmbH, Jülich Centre for Neutron Science (JCNS), Outstation at MLZ, 85747 Garching, Germany
| | - A Kriele
- Helmholtz Zentrum Geesthacht, Max-Plank-Straße 1, 21502 Geesthacht, Germany
| | - R Gilles
- Heinz Maier-Leibnitz Zentrum (MLZ), Technische Universität München , 85747 Garching, Germany
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Şeker Ş, Elçin AE, Yumak T, Sınağ A, Elçin YM. In vitro cytotoxicity of hydrothermally synthesized ZnO nanoparticles on human periodontal ligament fibroblast and mouse dermal fibroblast cells. Toxicol In Vitro 2014; 28:1349-58. [DOI: 10.1016/j.tiv.2014.06.016] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2014] [Revised: 06/06/2014] [Accepted: 06/25/2014] [Indexed: 10/25/2022]
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8
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Fabrication of Metal Oxide–Polymer Hybrid Nanocomposites. ORGANIC-INORGANIC HYBRID NANOMATERIALS 2014. [DOI: 10.1007/12_2014_285] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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9
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Surface modification of inorganic nanoparticles for development of organic–inorganic nanocomposites—A review. Prog Polym Sci 2013. [DOI: 10.1016/j.progpolymsci.2013.02.003] [Citation(s) in RCA: 1475] [Impact Index Per Article: 134.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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10
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Synthesis and Characterization of Zinc Oxide Nano-particles by Solid State Chemical Reaction Method. J CLUST SCI 2013. [DOI: 10.1007/s10876-013-0568-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Uma Sangari N, Chitra Devi S. Synthesis and characterization of nano ZnO rods via microwave assisted chemical precipitation method. J SOLID STATE CHEM 2013. [DOI: 10.1016/j.jssc.2012.08.011] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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12
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Mazilu M, Musat V, Innocenzi P, Kidchob T, Marongiu D. Liquid-Phase Preparation and Characterization of Zinc Oxide Nanoparticles. PARTICULATE SCIENCE AND TECHNOLOGY 2012. [DOI: 10.1080/02726351.2010.544016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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13
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Periyat P, Laffir F, Tofail SAM, Magner E. A facile aqueous sol–gel method for high surface area nanocrystalline CeO2. RSC Adv 2011. [DOI: 10.1039/c1ra00524c] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Self-Organization of ZnO Nanoparticles on UV-Curable Acrylate Nanocomposites. JOURNAL OF NANOTECHNOLOGY 2011. [DOI: 10.1155/2011/951036] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Our work focused on synthesis and investigation of nanoparticles role in structuring of homogenous nanocomposite based on ZnO nanoparticles in UV-curable monomers mixture. Due to strong interaction between nanoparticles surface and polymerizable carboxylic acid, nanoparticles were distributed homogeneously, and density of nanocomposite increased also in comparison with pure polymer matrix. Light scattering, plasticity, and water sorption non-monotonically depends on the concentration of nanoparticles concentration. UV-curable active matrix polymerization on the surface of ZnO nanoparticles was investigated using IR spectroscopy. The set of structural modifications of polymeric nanocomposites were observed by ASM, light scattering, Brinell hardness, and water sorption.Suggestions that the nanoparticles in the polymerization process play the role of photocatalysts and provide structuring effect on the nanocomposite were discussed.
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Padmanabhan SC, Ledwith D, Pillai SC, McCormack DE, Kelly JM. Microwave-assisted synthesis of ZnO micro-javelins. ACTA ACUST UNITED AC 2009. [DOI: 10.1039/b912537j] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Investigation on the catalytic activity of doped low-percentage oxide catalysts Mn/ZnO obtained from oxalate precursor. OPEN CHEM 2008. [DOI: 10.2478/s11532-007-0071-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
AbstractThe precursors with a low manganese content ≤ 0.07% Mn were synthesized by spontaneous crystallization from Zn2+, Mn2+ and C2O42−-containing solutions. The initial ratio Zn2+:C2O42− = 1:1 and 1:2 influences the morphology and prevailing orientations of the crystallites in the oxalate samples. The presence of such small Mn content in the samples does not change the morphology or size of the crystals. The ZnO and Mn/ZnO oxides with manganese content from 0.51×10−2 to 15.1×10−2 Wt % are obtained after thermal decomposition of the oxalates. The oxides preserved the morphology of the precursors. The catalytic tests show that the pure ZnO has a poor activity for CO oxidation reaction. Its doping with Mn promotes the catalytic activity (up from twice to five times) in spite of the very low contents of the dopants. The observed increase of the activity depends on both dopant concentration and Zn2+:C2O42− ratio, probably due to the different mechanism of the manganese inclusion and different morphology of the oxides. The catalysts of the 1:2 series are more active in CO oxidation reaction.
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Pillai SC, Kelly JM, McCormack DE, Ramesh R. High performance ZnO varistors prepared from nanocrystalline precursors for miniaturised electronic devices. ACTA ACUST UNITED AC 2008. [DOI: 10.1039/b804793f] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Han YS, Lin LW, Fuji M, Takahashi M. A Novel One-step Solution Approach to Synthesize Tubular ZnO Nanostructures. CHEM LETT 2007. [DOI: 10.1246/cl.2007.1002] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Carl Englert B. Nanomaterials and the environment: uses, methods and measurement. ACTA ACUST UNITED AC 2007; 9:1154-61. [DOI: 10.1039/b705988d] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Duffy GM, Pillai SC, McCormack DE. The effect of the rate of precursor production on the purity and aggregation morphology of nanoparticulate zinc oxide. ACTA ACUST UNITED AC 2007. [DOI: 10.1039/b610947k] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Elen K, Van Bael MK, Van den Rul H, D’Haen J, Mullens J. Additive-free Hydrothermal Synthesis of High Aspect Ratio ZnO Particles from Aqueous Solution. CHEM LETT 2006. [DOI: 10.1246/cl.2006.1420] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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