1
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Basuki T, Nakashima S. Effect of EDTA and Citric Acid Additive on the Polymorph, Morphology, and Photocatalytic Activity of Iron Oxyhydroxide. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024. [PMID: 39017588 DOI: 10.1021/acs.langmuir.4c00971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/18/2024]
Abstract
Iron oxyhydroxide [FeO(OH)] is a promising photocatalyst owing to its simple synthesis at mild temperatures and narrow band gap, which allows for the efficient harvesting of visible light. The selective production of FeO(OH) polymorphs and the modulation of their morphology by changing the iron salts, salt concentration, and additives have been widely reported. This study focuses on overcoming fast charge-carrier recombination by developing FeO(OH)-based heterostructure materials. The role of a chelating ligand (EDTA and citrate) in determining the polymorph type, morphology, and photocatalytic activity of FeO(OH) was studied. The findings revealed the additive produced of nanosized α-FeO(OH)/EDTA and layered γ-FeO(OH)/citrate with superior catalytic activities.
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Affiliation(s)
- Triyono Basuki
- Natural Science Center for Basic Research and Development (N-BARD), Hiroshima University, 1-4-2 Kagamiyama, Higashi-Hiroshima 739-8526, Japan
- Research Center for Nuclear Material and Radioactive Waste Technology, Indonesia Research and Innovation Agency (BRIN), Gedung 20, Kawasan PUSPIPTEK Serpong, Tangerang Selatan, Banten 15314, Indonesia
| | - Satoru Nakashima
- Natural Science Center for Basic Research and Development (N-BARD), Hiroshima University, 1-4-2 Kagamiyama, Higashi-Hiroshima 739-8526, Japan
- Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526, Japan
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2
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Tao J, Wu K, Chen Y, Li W, Gu Y, Liu R, Luo J. A facile one-pot strategy for the preparation of porous polymeric microspheres via UV irradiation-induced polymerization in emulsions. SOFT MATTER 2023; 19:1407-1417. [PMID: 36723259 DOI: 10.1039/d2sm01459a] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
In this study, a facile one-pot strategy was developed to prepare porous polymeric microspheres via photopolymerization, where organic solvents functioned as porogens. In this strategy, an oil phase containing organic solvents and photopolymerizable materials was stabilized in water to form a stable oil-in-water emulsion. Upon UV irradiation, the photopolymerizable materials (photosensitive monomers/photosensitive prepolymers) underwent polymerization to form microspheres and the subsequent removal of organic solvents left pores in microspheres, leading to the generation of porous polymeric microspheres with high yielding. The effects of organic solvents and the chemical structure and concentration of photopolymerizable materials on the microsphere structure were systematically explored. It was found that the polarity of the organic solvents played a decisive role in the preparation of porous microspheres. In addition, the increases in the solvent content and functionalities of photopolymerizable materials were more favorable for the generation of porous microspheres. This strategy could be applicable for a wide selection of photopolymerizable materials, which endowed this strategy with good applicability. The preparation of porous microspheres by this method was facile and easy to handle, enabling the scalable preparation of porous microspheres. In addition, the whole process can be completed within a few minutes at ambient temperature, which was time-saving and energy-saving.
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Affiliation(s)
- Junjie Tao
- The Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Lihu Street 1800, Wuxi, 214122, China.
| | - Kaiyun Wu
- The Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Lihu Street 1800, Wuxi, 214122, China.
| | - Yaxin Chen
- The Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Lihu Street 1800, Wuxi, 214122, China.
| | - Wei Li
- The Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Lihu Street 1800, Wuxi, 214122, China.
| | - Yao Gu
- The Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Lihu Street 1800, Wuxi, 214122, China.
| | - Ren Liu
- The Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Lihu Street 1800, Wuxi, 214122, China.
| | - Jing Luo
- The Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Lihu Street 1800, Wuxi, 214122, China.
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3
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van Embden J, Gross S, Kittilstved KR, Della Gaspera E. Colloidal Approaches to Zinc Oxide Nanocrystals. Chem Rev 2023; 123:271-326. [PMID: 36563316 DOI: 10.1021/acs.chemrev.2c00456] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Zinc oxide is an extensively studied semiconductor with a wide band gap in the near-UV. Its many interesting properties have found use in optics, electronics, catalysis, sensing, as well as biomedicine and microbiology. In the nanoscale regime the functional properties of ZnO can be precisely tuned by manipulating its size, shape, chemical composition (doping), and surface states. In this review, we focus on the colloidal synthesis of ZnO nanocrystals (NCs) and provide a critical analysis of the synthetic methods currently available for preparing ZnO colloids. First, we outline key thermodynamic considerations for the nucleation and growth of colloidal nanoparticles, including an analysis of different reaction methodologies and of the role of dopant ions on nanoparticle formation. We then comprehensively review and discuss the literature on ZnO NC systems, including reactions in polar solvents that traditionally occur at low temperatures upon addition of a base, and high temperature reactions in organic, nonpolar solvents. A specific section is dedicated to doped NCs, highlighting both synthetic aspects and structure-property relationships. The versatility of these methods to achieve morphological and compositional control in ZnO is explicated. We then showcase some of the key applications of ZnO NCs, both as suspended colloids and as deposited coatings on supporting substrates. Finally, a critical analysis of the current state of the art for ZnO colloidal NCs is presented along with existing challenges and future directions for the field.
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Affiliation(s)
- Joel van Embden
- School of Science, RMIT University, MelbourneVictoria, 3001, Australia
| | - Silvia Gross
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, 35131Padova, Italy.,Karlsruher Institut für Technologie (KIT), Institut für Technische Chemie und Polymerchemie (ITCP), Engesserstrasse 20, 76131Karlsruhe, Germany
| | - Kevin R Kittilstved
- Department of Chemistry, University of Massachusetts Amherst, Amherst, Massachusetts01003, United States
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4
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Abuaf M, Das S, Mastai Y. Organocatalytic chiral polymeric nanoparticles for asymmetric aldol reaction. RSC Adv 2023; 13:1580-1586. [PMID: 36688059 PMCID: PMC9817469 DOI: 10.1039/d2ra07244k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Accepted: 12/22/2022] [Indexed: 01/09/2023] Open
Abstract
Chiral polymeric particles (CPPs) were studied extensively in recent years due to their importance in pharmaceutical applications. Here, nanosized CPPs were synthesized and applied as catalysts for direct asymmetric aldol reaction. The CPPs were prepared by miniemulsion or inverse miniemulsion based on various chiral amino acid derivatives and characterized by dynamic light scattering and scanning electron microscopy. The nanoparticles with spherical structure between 250 and 400 nm and high chiral surface area were used as catalysts in the aldol reaction at room temperature without additional solvent. l-tryptophan gave the highest enantiomeric excess, >86% with similar catalytic performance four times.
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Affiliation(s)
- Meir Abuaf
- Department of Chemistry, Bar-Ilan UniversityRamat-Gan 5290002Israel+972-03738-4053
| | - Subhomoy Das
- Department of Chemistry, Bar-Ilan UniversityRamat-Gan 5290002Israel+972-03738-4053
| | - Yitzhak Mastai
- Department of Chemistry, Bar-Ilan UniversityRamat-Gan 5290002Israel+972-03738-4053
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5
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Smart gating porous particles as new carriers for drug delivery. Adv Drug Deliv Rev 2021; 174:425-446. [PMID: 33930490 DOI: 10.1016/j.addr.2021.04.023] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 04/12/2021] [Accepted: 04/23/2021] [Indexed: 12/13/2022]
Abstract
The design of smart drug delivery carriers has recently attracted great attention in the biomedical field. Smart carriers can specifically respond to physical and chemical changes in their environment, such as temperature, photoirradiation, ultrasound, magnetic field, pH, redox species, and biomolecules. This review summarizes recent advances in the integration of porous particles and stimuli-responsive gatekeepers for effective drug delivery. Their unique structural properties play an important role in facilitating the diffusion of drug molecules and cell attachment. Various techniques for fabricating porous materials, with their major advantages and limitations, are summarized. Smart gatekeepers provide advanced functions such as "open-close" switching by functionalized stimuli-responsive polymers on a particle's pores. These controlled delivery systems enable drugs to be targeted at specific rates, time programs, and sites of the human body. The gate structures, gating mechanisms, and controlled release mechanisms of each trigger are detailed. Current ongoing research and future trends in targeted drug delivery, tissue engineering, and regenerative medicine applications are highlighted.
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6
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Abuaf M, Mastai Y. Synthesis of Multi Amino Acid Chiral Polymeric Microparticles for Enantioselective Chemistry. MACROMOL CHEM PHYS 2020. [DOI: 10.1002/macp.202000328] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Meir Abuaf
- Department of Chemistry and Institute of Nanotechnology Bar‐Ilan University Ramat‐Gan 52900 Israel
| | - Yitzhak Mastai
- Department of Chemistry and Institute of Nanotechnology Bar‐Ilan University Ramat‐Gan 52900 Israel
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7
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Álvarez-Bermúdez O, Torres-Suay A, Pérez-Pla FF, Landfester K, Muñoz-Espí R. Magnetically enhanced polymer-supported ceria nanocatalysts for the hydration of nitriles. NANOTECHNOLOGY 2020; 31:405604. [PMID: 32259810 DOI: 10.1088/1361-6528/ab8765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The heterogeneous catalysis of the hydration of nitriles to amides is a process of great industrial relevance in which cerium(IV) oxide (also referred to as ceria) has shown an outstanding catalytic performance. The use of non-supported ceria nanoparticles is related to difficulties in the purification of the product and the recovery and recyclability of the catalyst. Therefore, in this work, ceria nanoparticles are supported on a polymer matrix either by synthesizing polymer particles by so-called Pickering miniemulsions while using ceria nanoparticles as emulsion stabilizers or, as a comparison, by in-situ crystallization on preformed polymer particles. The former strategy presents significant advantages over the latter in terms of time and consumption of resources, and it facilitates an easier scale-up of the process. In both strategies, the incorporation of a magnetoresponsive core within the polymer matrix allows the recovery and the recycling of the catalyst by simple application of a magnetic field and offers an enhancement of the catalytic efficiency.
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Affiliation(s)
- Olaia Álvarez-Bermúdez
- Institute of Materials Science (ICMUV), University of Valencia, c/ Catedràtic José Beltrán 2, 46980 Paterna, Spain. Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
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8
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Muñoz‐Espí R, Landfester K. Low-Temperature Miniemulsion-Based Routes for Synthesis of Metal Oxides. Chemistry 2020; 26:9304-9313. [PMID: 32441349 PMCID: PMC7496421 DOI: 10.1002/chem.202001246] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Indexed: 11/26/2022]
Abstract
The use of miniemulsions containing chemical precursors in the disperse phase is a versatile method to produce nanoparticles and nanostructures of different chemical nature, including not only polymers, but also a variety of inorganic materials. This Minireview focuses on materials in which nanostructures of metal oxides are synthesized in processes that involve the miniemulsion technique in any of the steps. This includes in the first place those approaches in which the spaces provided by nanodroplets are directly used to confine precipitation reactions that lead eventually to oxides. On the other hand, miniemulsions can also be used to form functionalized polymer nanoparticles that can serve either as supports or as controlling agents for the synthesis of metal oxides. Herein, the description of essential aspects of the methods is combined with the most representative examples reported in the last years for each strategy.
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Affiliation(s)
- Rafael Muñoz‐Espí
- Institute of Materials Science (ICMUV)Universitat de Valènciac/ Catedràtic José Beltrán 246980PaternaSpain
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9
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Bretos I, Diodati S, Jiménez R, Tajoli F, Ricote J, Bragaggia G, Franca M, Calzada ML, Gross S. Low-Temperature Solution Crystallization of Nanostructured Oxides and Thin Films. Chemistry 2020; 26:9157-9179. [PMID: 32212279 DOI: 10.1002/chem.202000448] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 03/16/2020] [Indexed: 01/27/2023]
Abstract
As an introduction to this themed issue, a critically selected overview of recent progress on the topic of solution methods for the low-temperature crystallization of nanoscale oxide materials is presented. It is focused on the low-temperature solution processing of oxide nanostructures and thin films. Benefits derived from these methods span from minimizing the environmental impact to reducing the fabrication costs. In addition, this topic is regarded as a key objective in the area because it offers a unique opportunity for the use of these materials in areas like flexible electronics, energy conversion and storage, environmental sciences, catalysis, or biomedicine.
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Affiliation(s)
- Iñigo Bretos
- Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas (ICMM-CSIC), C/ Sor Juana Inés de la Cruz, 3. Cantoblanco, 28049, Madrid, Spain
| | - Stefano Diodati
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35131, Padova, Italy
| | - Ricardo Jiménez
- Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas (ICMM-CSIC), C/ Sor Juana Inés de la Cruz, 3. Cantoblanco, 28049, Madrid, Spain
| | - Francesca Tajoli
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35131, Padova, Italy
| | - Jesús Ricote
- Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas (ICMM-CSIC), C/ Sor Juana Inés de la Cruz, 3. Cantoblanco, 28049, Madrid, Spain
| | - Giulia Bragaggia
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35131, Padova, Italy
| | - Marina Franca
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35131, Padova, Italy
| | - Maria Lourdes Calzada
- Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas (ICMM-CSIC), C/ Sor Juana Inés de la Cruz, 3. Cantoblanco, 28049, Madrid, Spain
| | - Silvia Gross
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35131, Padova, Italy
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10
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Jones CD, Lewis AR, Jones DR, Ottley CJ, Liu K, Steed JW. Lilypad aggregation: localised self-assembly and metal sequestration at a liquid-vapour interface. Chem Sci 2020; 11:7501-7510. [PMID: 34123033 PMCID: PMC8159346 DOI: 10.1039/d0sc02190c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Accepted: 07/07/2020] [Indexed: 11/23/2022] Open
Abstract
Spatially resolved soft materials, such as vesicles and microgels, have shown promise as selective adsorbents and microscale reaction vessels. However, spatiotemporal control of aggregation can be difficult to achieve. In this study, nickel(ii) chloride and a dipyridyl oligo(urea) ligand were combined in a vapour-diffusion setup to produce a localised spheroidal aggregate at the liquid-vapour interface. This aggregate forms via the self-assembly and fusion of monodisperse colloids and grows until its weight is no longer counterbalanced by surface tension. A simple physical model reveals that this process, termed lilypad aggregation, is possible only for surface energies that favour neither bulk aggregation nor the growth of an interfacial film. These surface energies dictate the final size and shape of the aggregate and may be estimated through visual monitoring of its changing morphology. Lilypad aggregates sequester metal from the surrounding sol and can be collected manually from the surface of the liquid.
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Affiliation(s)
| | - Aled R Lewis
- Systems and Process Engineering Centre (SPEC), Energy Safety Research Institute (ESRI), College of Engineering, University of Swansea Singleton Park Swansea SA2 8PP UK
| | - Daniel R Jones
- Systems and Process Engineering Centre (SPEC), Energy Safety Research Institute (ESRI), College of Engineering, University of Swansea Singleton Park Swansea SA2 8PP UK
| | | | - Kaiqiang Liu
- Key Laboratory of Applied Surface and Colloid Chemistry (Ministry of Education), School of Chemistry and Chemical Engineering, Shaanxi Normal University Xi'an 710119 China
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11
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Diodati S, Walton RI, Mascotto S, Gross S. Low-temperature wet chemistry synthetic approaches towards ferrites. Inorg Chem Front 2020. [DOI: 10.1039/d0qi00294a] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Solution chemistry allows the crystallisation of range of iron oxides, including MFe2O4 spinels, MFeO3 perovskites and hexaferrites, such as BaFe12O19, with nanoscale crystallinity and properties suitable for fields such as catalysis and electronics.
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Affiliation(s)
- Stefano Diodati
- Dipartimento di Scienze Chimiche – Università degli Studi di Padova
- 35131 Padova
- Italy
| | | | - Simone Mascotto
- Institut für Anorganische und Angewandte Chemie
- Universität Hamburg
- 20146 Hamburg
- Germany
| | - Silvia Gross
- Dipartimento di Scienze Chimiche – Università degli Studi di Padova
- 35131 Padova
- Italy
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12
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Meng X, Wang Y, Li X, Chen X, Lv D, Xie C, Yin Q, Zhang X, Hao H. Confined Crystallization of Pigment Red 146 in Emulsion Droplets and Its Mechanism. NANOMATERIALS (BASEL, SWITZERLAND) 2019; 9:E379. [PMID: 30845663 PMCID: PMC6474010 DOI: 10.3390/nano9030379] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Revised: 02/22/2019] [Accepted: 02/28/2019] [Indexed: 11/16/2022]
Abstract
In this work, the effect of confined space on crystallization processes of pigments was investigated by using C.I. Pigment Red 146 (PR 146) as a model compound. The colloidal system (i.e., emulsion droplets) was used as a nanoreactor to prepare nanoscale PR 146 for the inkjet printer. The effects of the space confinement were investigated by comparing the products of PR 146 prepared from bulk solution, macroemulsion, and miniemulsion. The results showed that PR 146 crystallized in mini-emulsion had the narrowest particle size distribution and the average particle size can be as small as 172.5 nm, one order of magnitude smaller than the one obtained from the bulk solution. X-ray diffraction (XRD) data revealed that PR 146 crystallized in all three solutions where the crystalline state and had similar crystallite sizes. The process mechanism of crystallization confined in the miniemulsion droplets was proposed and explained. The function mechanism of the co-stabilizer during the crystallization of PR 146 in emulsion was also explained. It was found that sodium chloride could counteract the pressure difference as an osmotic pressure agent and prevent the migrating of water from small droplets into big droplets. The influences of dosages of emulsifiers and co-stabilizers on droplet size and the size of the obtained PR 146 particles were evaluated and the optimal conditions were determined. Furthermore, the disparity of PR 146 products prepared by different methods was investigated by UV⁻Vis spectra. The aqueous dispersion of PR 146 crystallized in miniemulsion had the highest absorbance and darkest color.
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Affiliation(s)
- Xianze Meng
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.
| | - Yongli Wang
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China.
| | - Xin Li
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.
| | - Xue Chen
- Shandong YuHong New Pigment Co., Ltd., Dezhou 253000, China.
| | - Dongjun Lv
- Shandong YuHong New Pigment Co., Ltd., Dezhou 253000, China.
| | - Chuang Xie
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China.
| | - Qiuxiang Yin
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China.
| | - Xuling Zhang
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.
| | - Hongxun Hao
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China.
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13
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De Fazio AF, Morgese G, Mognato M, Piotto C, Pedron D, Ischia G, Causin V, Rosenboom JG, Benetti EM, Gross S. Robust and Biocompatible Functionalization of ZnS Nanoparticles by Catechol-Bearing Poly(2-methyl-2-oxazoline)s. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:11534-11543. [PMID: 30170495 DOI: 10.1021/acs.langmuir.8b02287] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Zinc sulfide (ZnS) nanoparticles (NPs) are particularly interesting materials for their electronic and luminescent properties. Unfortunately, their robust and stable functionalization and stabilization, especially in aqueous media, has represented a challenging and not yet completely accomplished task. In this work, we report the synthesis of colloidally stable, photoluminescent and biocompatible core-polymer shell ZnS and ZnS:Tb NPs by employing a water-in-oil miniemulsion (ME) process combined with surface functionalization via catechol-bearing poly-2-methyl-2-oxazoline (PMOXA) of various molar masses. The strong binding of catechol anchors to the metal cations of the ZnS surface, coupled with the high stability of PMOXA against chemical degradation, enable the formation of suspensions presenting excellent colloidal stability. This feature, combined with the assessed photoluminescence and biocompatibility, make these hybrid NPs suitable for optical bioimaging.
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Affiliation(s)
- Angela Federica De Fazio
- Dipartimento di Scienze Chimiche , Università degli Studi di Padova , via Marzolo 1 , 35131 Padova , Italy
- Physics and Astronomy , University of Southampton, Highfield Campus SO17 1BJ , Southampton , United Kingdom
| | - Giulia Morgese
- Polymer Surfaces Group, Laboratory for Surface Science and Technology , ETH Zürich , Vladimir-Prelog-Weg 5 , 8093-CH Zürich , Switzerland
| | - Maddalena Mognato
- Dipartimento di Biologia , Università degli Studi di Padova , via U. Bassi 58/B , 35131 Padova , Italy
| | - Celeste Piotto
- Dipartimento di Biologia , Università degli Studi di Padova , via U. Bassi 58/B , 35131 Padova , Italy
| | - Danilo Pedron
- Dipartimento di Scienze Chimiche , Università degli Studi di Padova , via Marzolo 1 , 35131 Padova , Italy
| | - Gloria Ischia
- Dipartimento di Ingegneria Industriale , Università di Trento , via Sommarive 9 , 38122 Trento , Italy
| | - Valerio Causin
- Dipartimento di Scienze Chimiche , Università degli Studi di Padova , via Marzolo 1 , 35131 Padova , Italy
| | - Jan-Georg Rosenboom
- Department of Chemistry and Applied Biosciences, Institute of Chemical and Bioengineering , ETH Zürich , Vladimir-Prelog-Weg 1-5/10 8093 Zürich , Switzerland
| | - Edmondo M Benetti
- Polymer Surfaces Group, Laboratory for Surface Science and Technology , ETH Zürich , Vladimir-Prelog-Weg 5 , 8093-CH Zürich , Switzerland
| | - Silvia Gross
- Dipartimento di Scienze Chimiche , Università degli Studi di Padova , via Marzolo 1 , 35131 Padova , Italy
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14
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Antonello A, Benedetti C, Pérez-Pla FF, Kokkinopoulou M, Kirchhoff K, Fischer V, Landfester K, Gross S, Muñoz-Espí R. Colloidally Confined Crystallization of Highly Efficient Ammonium Phosphomolybdate Catalysts. ACS APPLIED MATERIALS & INTERFACES 2018; 10:23174-23186. [PMID: 29882409 DOI: 10.1021/acsami.8b01617] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Nanodroplets in inverse miniemulsions provide a colloidal confinement for the crystallization of ammonium phosphomolybdate (APM), influencing the resulting particle size. The effects of the space confinement are investigated by comparing the crystallization of analogous materials both in miniemulsion and in bulk solution. Both routes result in particles with a rhombododecahedral morphology, but the ones produced in miniemulsion have sizes between 40 and 90 nm, 3 orders of magnitude smaller than the ones obtained in bulk solution. The catalytic activity of the materials is studied by taking the epoxidation of cis-cyclooctene as a model reaction. The miniemulsion route yields APM particles catalytically much more active than analogous samples produced in bulk solution, which can be explained by their higher dispersibility in organic solvents, their higher surface area, and their higher porosity. Inorganic phosphate salt precursors are compared with organic phosphate sources. APM nanoparticles prepared in miniemulsion from d-glucose-6-phosphate and O-phospho-dl-serine yield a conversion in the epoxidation reaction of more than 90% after only 1 h, compared to 30% for materials prepared in bulk solution. In addition, the catalysts prepared in miniemulsion display a promising recyclability.
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Affiliation(s)
- Alice Antonello
- Max Planck Institute for Polymer Research , Ackermannweg 10 , 55128 Mainz , Germany
| | - Cesare Benedetti
- Max Planck Institute for Polymer Research , Ackermannweg 10 , 55128 Mainz , Germany
| | - Francisco F Pérez-Pla
- Institut de Ciència dels Materials (ICMUV) , Universitat de València , c/ Catedràtic José Beltrán 2 , 46980 Paterna , Spain
| | - Maria Kokkinopoulou
- Max Planck Institute for Polymer Research , Ackermannweg 10 , 55128 Mainz , Germany
| | - Katrin Kirchhoff
- Max Planck Institute for Polymer Research , Ackermannweg 10 , 55128 Mainz , Germany
| | - Viktor Fischer
- Max Planck Institute for Polymer Research , Ackermannweg 10 , 55128 Mainz , Germany
| | - Katharina Landfester
- Max Planck Institute for Polymer Research , Ackermannweg 10 , 55128 Mainz , Germany
| | - Silvia Gross
- Dipartimento di Scienze Chimiche , Università degli Studi di Padova , via Marzolo 1 , 35131 Padova , Italy
| | - Rafael Muñoz-Espí
- Max Planck Institute for Polymer Research , Ackermannweg 10 , 55128 Mainz , Germany
- Institut de Ciència dels Materials (ICMUV) , Universitat de València , c/ Catedràtic José Beltrán 2 , 46980 Paterna , Spain
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15
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Singh I, Dey S, Santra S, Landfester K, Muñoz-Espí R, Chandra A. Cerium-Doped Copper(II) Oxide Hollow Nanostructures as Efficient and Tunable Sensors for Volatile Organic Compounds. ACS OMEGA 2018; 3:5029-5037. [PMID: 31458716 PMCID: PMC6641873 DOI: 10.1021/acsomega.8b00203] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Accepted: 04/02/2018] [Indexed: 05/11/2023]
Abstract
Tuning sensing capabilities of simple to complex oxides for achieving enhanced sensitivity and selectivity toward the detection of toxic volatile organic compounds (VOCs) is extremely important and remains a challenge. In the present work, we report the synthesis of pristine and Ce-doped CuO hollow nanostructures, which have much higher VOC sensing and response characteristics than their solid analogues. Undoped CuO hollow nanostructures exhibit high response for sensing of acetone as compared to commercial CuO nanoparticles. As a result of doping with cerium, the material starts showing selectivity. CuO hollow structures doped with 5 at. % of Ce return highest response toward methanol sensing, whereas increasing the Ce doping concentration to 10%, the material shows high response for both-acetone and methanol. The observed tunability in selectivity is directly linked to the varying concentration of the oxygen defects on the surface of the nanostructures. The work also shows that the use of hollow nanostructures could be the way forward for obtaining high-performance sensors even by using conventional and simple metal or semiconductor oxides.
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Affiliation(s)
- Inderjeet Singh
- Department
of Physics and Department of Electronics and Electrical Communications, Indian Institute of Technology, Kharagpur 721302, West Bengal, India
| | - Sayan Dey
- Department
of Physics and Department of Electronics and Electrical Communications, Indian Institute of Technology, Kharagpur 721302, West Bengal, India
| | - Sumita Santra
- Department
of Physics and Department of Electronics and Electrical Communications, Indian Institute of Technology, Kharagpur 721302, West Bengal, India
| | - Katharina Landfester
- Department
of Physical Chemistry of Polymers, Max Planck
Institute for Polymer Research, Ackermannweg 10, Mainz 55128, Germany
| | - Rafael Muñoz-Espí
- Department
of Physical Chemistry of Polymers, Max Planck
Institute for Polymer Research, Ackermannweg 10, Mainz 55128, Germany
- Institute
of Materials Science (ICMUV), University of Valencia, C/Catedràtic José
Beltrán 2, Paterna 46980, Spain
| | - Amreesh Chandra
- Department
of Physics and Department of Electronics and Electrical Communications, Indian Institute of Technology, Kharagpur 721302, West Bengal, India
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16
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Loskutov AI, Lokshin BV, Gudasheva TA, Oshurko VB, Solis Pinargote N, Sazonova NM, Romanov VA. Role of the interfaces and the charge of a molecule in the non-equilibrium crystallization of dipeptide nanomaterials onto solid substrates. CrystEngComm 2018. [DOI: 10.1039/c8ce01468j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A critical role of the net charge of molecule and nature of interfaces on the structure and properties of crystallized dipeptide layers was established.
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Affiliation(s)
| | - Boris V. Lokshin
- A.N. Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- Moscow
- 119991 Russia
| | - Tatiana A. Gudasheva
- V. V. Zakusov Scientific Research Institute of Pharmacology
- Russian Academy of Medical Sciences
- Moscow
- 125315 Russia
| | - Vadim B. Oshurko
- Moscow State Technological University STANKIN
- Moscow
- 127994 Russia
| | | | - Nellya M. Sazonova
- V. V. Zakusov Scientific Research Institute of Pharmacology
- Russian Academy of Medical Sciences
- Moscow
- 125315 Russia
| | - Vadim A. Romanov
- Moscow State Technological University STANKIN
- Moscow
- 127994 Russia
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17
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Müller WEG, Wang S, Ackermann M, Neufurth M, Steffen R, Mecja E, Muñoz-Espí R, Feng Q, Schröder HC, Wang X. Rebalancing β-Amyloid-Induced Decrease of ATP Level by Amorphous Nano/Micro Polyphosphate: Suppression of the Neurotoxic Effect of Amyloid β-Protein Fragment 25-35. Int J Mol Sci 2017; 18:ijms18102154. [PMID: 29035351 PMCID: PMC5666835 DOI: 10.3390/ijms18102154] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Revised: 10/11/2017] [Accepted: 10/14/2017] [Indexed: 01/24/2023] Open
Abstract
Morbus Alzheimer neuropathology is characterized by an impaired energy homeostasis of brain tissue. We present an approach towards a potential therapy of Alzheimer disease based on the high-energy polymer inorganic polyphosphate (polyP), which physiologically occurs both in the extracellular and in the intracellular space. Rat pheochromocytoma (PC) 12 cells, as well as rat primary cortical neurons were exposed to the Alzheimer peptide Aβ25-35. They were incubated in vitro with polyphosphate (polyP); ortho-phosphate was used as a control. The polymer remained as Na+ salt; or complexed in a stoichiometric ratio to Ca2+ (Na-polyP[Ca2+]); or was processed as amorphous Ca-polyP microparticles (Ca-polyP-MP). Ortho-phosphate was fabricated as crystalline Ca-phosphate nanoparticles (Ca-phosphate-NP). We show that the pre-incubation of PC12 cells and primary cortical neurons with polyP protects the cells against the neurotoxic effect of the Alzheimer peptide Aβ25-35. The strongest effect was observed with amorphous polyP microparticles (Ca-polyP-MP). The effect of the soluble sodium salt; Na-polyP (Na-polyP[Ca2+]) was lower; while crystalline orthophosphate nanoparticles (Ca-phosphate-NP) were ineffective. Ca-polyP-MP microparticles and Na-polyP[Ca2+] were found to markedly enhance the intracellular ATP level. Pre-incubation of Aβ25-35 during aggregate formation, with the polyP preparation before exposure of the cells, had a small effect on neurotoxicity. We conclude that recovery of the compromised energy status in neuronal cells by administration of nontoxic biodegradable Ca-salts of polyP reverse the β-amyloid-induced decrease of adenosine triphosphate (ATP) level. This study contributes to a new routes for a potential therapeutic intervention in Alzheimer’s disease pathophysiology.
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Affiliation(s)
- Werner E G Müller
- ERC Advanced Investigator Grant Research Group at the Institute for Physiological Chemistry, University Medical Center of the Johannes Gutenberg University, Duesbergweg 6, D-55128 Mainz, Germany.
| | - Shunfeng Wang
- ERC Advanced Investigator Grant Research Group at the Institute for Physiological Chemistry, University Medical Center of the Johannes Gutenberg University, Duesbergweg 6, D-55128 Mainz, Germany.
| | - Maximilian Ackermann
- Institute of Functional and Clinical Anatomy, University Medical Center of the Johannes Gutenberg University, Johann Joachim Becher Weg 13, D-55099 Mainz, Germany.
| | - Meik Neufurth
- ERC Advanced Investigator Grant Research Group at the Institute for Physiological Chemistry, University Medical Center of the Johannes Gutenberg University, Duesbergweg 6, D-55128 Mainz, Germany.
| | - Renate Steffen
- ERC Advanced Investigator Grant Research Group at the Institute for Physiological Chemistry, University Medical Center of the Johannes Gutenberg University, Duesbergweg 6, D-55128 Mainz, Germany.
| | - Egherta Mecja
- ERC Advanced Investigator Grant Research Group at the Institute for Physiological Chemistry, University Medical Center of the Johannes Gutenberg University, Duesbergweg 6, D-55128 Mainz, Germany.
| | - Rafael Muñoz-Espí
- Institute of Materials Science (ICMUV), Universitat de València, C/Catedràtic José Beltrán 2, 46980 Paterna, València, Spain.
| | - Qingling Feng
- Key Laboratory of Advanced Materials of Ministry of Education of China, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China.
| | - Heinz C Schröder
- ERC Advanced Investigator Grant Research Group at the Institute for Physiological Chemistry, University Medical Center of the Johannes Gutenberg University, Duesbergweg 6, D-55128 Mainz, Germany.
| | - Xiaohong Wang
- ERC Advanced Investigator Grant Research Group at the Institute for Physiological Chemistry, University Medical Center of the Johannes Gutenberg University, Duesbergweg 6, D-55128 Mainz, Germany.
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18
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Functionalisation of Colloidal Transition Metal Sulphides Nanocrystals: A Fascinating and Challenging Playground for the Chemist. CRYSTALS 2017. [DOI: 10.3390/cryst7040110] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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19
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Singh I, Landfester K, Muñoz-Espí R, Chandra A. Evolution of hollow nanostructures in hybrid Ce 1-x Cu x O 2 under droplet confinement leading to synergetic effects on the physical properties. NANOTECHNOLOGY 2017; 28:075601. [PMID: 28084225 DOI: 10.1088/1361-6528/aa5376] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
The paper discusses a successful strategy for tuning the hollow, porous or even solid morphologies of pure and Cu2+-doped CeO2 nanostructures. The reaction of nanodroplets at the interface in miniemulsions is significantly affected by the concentration of dopants. The growth mechanism is both reaction- as well as diffusion-controlled, which finally determines the particular morphology. With a varying degree of dopant concentration and quantum confinement, the concentration of Ce3+ available on the surface of the nano-droplets and -particles is found to change quite appreciably. This immediately leads to modulation in the physical properties, such as ferromagnetism or absorption. The significant red shift in the absorption spectra and associated broadband visible photoluminescence opens newer applications for the present material in visible optoelectronic devices.
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Affiliation(s)
- Inderjeet Singh
- Department of Physics, Indian Institute of Technology, Kharagpur-721302, West Bengal, India
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20
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Varol HS, Álvarez-Bermúdez O, Dolcet P, Achinuq B, Gross S, Landfester K, Muñoz-Espí R. Crystallization at Nanodroplet Interfaces in Emulsion Systems: A Soft-Template Strategy for Preparing Porous and Hollow Nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:13116-13123. [PMID: 27951699 DOI: 10.1021/acs.langmuir.6b02954] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A heterophase method to prepare hollow and/or porous crystalline nanoparticles of metal oxides at room temperature is presented, taking cerium(IV) oxide and γ-iron(III) oxide (i.e., maghemite) as representative cases. The crystallization begins at the oil-water interface in aqueous nanodroplets of the precursor in inverse (water-in-oil) miniemulsion systems, and it may continue toward the inner part of the droplets. A poly(styrene-b-acrylic acid) block copolymer is used as a structuring agent because the ability of the carboxylic groups to bind metal ions improves the inorganic shell formation. A precipitating base is added from the continuous phase, generating hydroxide species at the interface that begin the crystallization. We analyze the effects of the synthetic parameters in terms of colloidal stability and morphology of the resulting materials. In the case of maghemite samples, the prepared dispersions of hollow particles present a distinct magnetofluidic behavior.
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Affiliation(s)
- H Samet Varol
- Max Planck Institute for Polymer Research , Ackermannweg 10, 55128 Mainz, Germany
| | - Olaia Álvarez-Bermúdez
- Max Planck Institute for Polymer Research , Ackermannweg 10, 55128 Mainz, Germany
- Institut de Ciència dels Materials, Universitat de València , carrer Catedràtic José Beltrán 2, Paterna, 46980 València, Spain
| | - Paolo Dolcet
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova , Via Marzolo 1, 35131 Padova, Italy
| | - Barat Achinuq
- Institut für Mikro- und Nanomaterialien, Universität Ulm , Albert-Einstein-Allee 47, 89081 Ulm, Germany
| | - Silvia Gross
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova , Via Marzolo 1, 35131 Padova, Italy
- Istituto di Chimica della Materia Condensata e di Tecnologie per l'Energia - CNR (ICMATE-CNR) , Via Marzolo 1, 35131 Padova, Italy
| | - Katharina Landfester
- Max Planck Institute for Polymer Research , Ackermannweg 10, 55128 Mainz, Germany
| | - Rafael Muñoz-Espí
- Max Planck Institute for Polymer Research , Ackermannweg 10, 55128 Mainz, Germany
- Institut de Ciència dels Materials, Universitat de València , carrer Catedràtic José Beltrán 2, Paterna, 46980 València, Spain
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21
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Piradashvili K, Alexandrino EM, Wurm FR, Landfester K. Reactions and Polymerizations at the Liquid–Liquid Interface. Chem Rev 2015; 116:2141-69. [DOI: 10.1021/acs.chemrev.5b00567] [Citation(s) in RCA: 156] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Keti Piradashvili
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | | | - Frederik R. Wurm
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Katharina Landfester
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
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22
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Singh I, Landfester K, Chandra A, Muñoz-Espí R. A new approach for crystallization of copper(II) oxide hollow nanostructures with superior catalytic and magnetic response. NANOSCALE 2015; 7:19250-8. [PMID: 26525922 DOI: 10.1039/c5nr05579b] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
We report the synthesis of copper(II) oxide hollow nanostructures at ambient pressure and close to room temperature by applying the soft templating effect provided by the confinement of droplets in miniemulsion systems. Particle growth can be explained by considering a mechanism that involves both diffusion and reaction control. The catalytic reduction of p-nitrophenol in aqueous media is used as a model reaction to prove the catalytic activity of the materials: the synthesized hollow structures show nearly 100 times higher rate constants than solid CuO microspheres. The kinetic behavior and the order of the reduction reaction change due to the increase of the surface area of the hollow structures. The synthesis also leads to modification of physical properties such as magnetism.
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Affiliation(s)
- Inderjeet Singh
- Department of Physics, Indian Institute of Technology, Kharagpur - 721302, West Bengal, India.
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23
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Diodati S, Dolcet P, Casarin M, Gross S. Pursuing the Crystallization of Mono- and Polymetallic Nanosized Crystalline Inorganic Compounds by Low-Temperature Wet-Chemistry and Colloidal Routes. Chem Rev 2015; 115:11449-502. [DOI: 10.1021/acs.chemrev.5b00275] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Stefano Diodati
- Dipartimento
di Scienze Chimiche, Università degli Studi di Padova, via
Marzolo, 1, I-35131, Padova, Italy
| | - Paolo Dolcet
- Dipartimento
di Scienze Chimiche, Università degli Studi di Padova, via
Marzolo, 1, I-35131, Padova, Italy
- Istituto per l’Energetica e le Interfasi, IENI-CNR and INSTM, UdR Padova, via Marzolo, 1, I-35131, Padova, Italy
| | - Maurizio Casarin
- Dipartimento
di Scienze Chimiche, Università degli Studi di Padova, via
Marzolo, 1, I-35131, Padova, Italy
- Istituto per l’Energetica e le Interfasi, IENI-CNR and INSTM, UdR Padova, via Marzolo, 1, I-35131, Padova, Italy
| | - Silvia Gross
- Dipartimento
di Scienze Chimiche, Università degli Studi di Padova, via
Marzolo, 1, I-35131, Padova, Italy
- Istituto per l’Energetica e le Interfasi, IENI-CNR and INSTM, UdR Padova, via Marzolo, 1, I-35131, Padova, Italy
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24
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Mari M, Müller B, Landfester K, Muñoz-Espí R. Ceria/POLYMER hybrid nanoparticles as efficient catalysts for the hydration of nitriles to amides. ACS APPLIED MATERIALS & INTERFACES 2015; 7:10727-10733. [PMID: 25946747 DOI: 10.1021/acsami.5b01847] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We report the synthesis of ceria/polymer hybrid nanoparticles and their use as effective supported catalysts for the hydration of nitriles to amide, exemplified with the conversion of 2-cyanopiridine to 2-picolinamide. The polymeric cores, made of either polystyrene (PS) or poly(methyl methacrylate) (PMMA), are prepared by miniemulsion copolymerization in the presence of different functional comonomers that provide carboxylic or phosphate groups: acrylic acid, maleic acid, and ethylene glycol methacrylate phosphate. The functional groups of the comonomers generate a corona around the main polymer particle and serve as nucleating agents for the in situ crystallization of cerium(IV) oxide. The obtained hybrid nanoparticles can be easily redispersed in water or ethanol. The conversion of amides to nitriles was quantitative for most of the catalytic samples, with yields close to 100%. According to our experimental observations by high-performance liquid chromatography (HPLC), no work up is needed to separate the product from unreacted substrate. The substrate remains absorbed on the catalyst surface, whereas the product can be easily separated. The catalysts are shown to be recyclable and can be reused for a large number of cycles without loss in efficiency.
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Affiliation(s)
- Margherita Mari
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Beate Müller
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Katharina Landfester
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Rafael Muñoz-Espí
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
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25
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Correction: Hood, M.A., et al. Synthetic Strategies in the Preparation of Polymer/Inorganic Hybrid Nanoparticles. Materials 2014, 7, 4057-4087. MATERIALS (BASEL, SWITZERLAND) 2014; 7:7583-7614. [PMID: 28795684 PMCID: PMC5512675 DOI: 10.3390/ma7117583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/07/2014] [Accepted: 08/21/2014] [Indexed: 11/16/2022]
Abstract
In [1], several sentences were repeated three times on pages 4062, 4063 and 4065. In addition, many references were incorrect. The errors were introduced by the editorial office during the editing process. We apologize for this mistake and any inconvenience this may have caused to authors and readers. The corrected manuscript is given below.[...].
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26
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Wang S, Liu R, Han C, Wang J, Li M, Yao J, Li H, Wang Y. A novel strategy to synthesize hierarchical, porous carbohydrate-derived carbon with tunable properties. NANOSCALE 2014; 6:13510-13517. [PMID: 25267462 DOI: 10.1039/c4nr03826f] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Hydrothermal carbonization (HTC) of carbohydrate is an interesting candidate for the preparation of carbon materials, as it provides an easy, inexpensive and environmental friendly route. However, it is difficult to prepare porous carbon materials by a straight HTC process. Herein, the solubilising technology of micelles was introduced to direct the HTC of fructose by using an amphiphilic block copolymer, poly-(4-vinylpyridine)-block-poly-(ethylene glycol) (P4VP-PEG), as a structure-directing agent. By this strategy, hierarchical porous carbon materials with tunable properties were prepared. It was found that P4VP-PEG micelles could solubilize fructose and confine the formation of primary carbon domains during a sol-gel process. And the micelle size could be adjusted easily by changing the preparation conditions. Accordingly, the particle size of the obtained carbon materials was effectively tuned from 20 to 100 nm by the direction of the primary micelle size. After calcination, the hierarchical porous carbon materials were evidenced as effective electrode materials for supercapacitor with a capacitance of ∼197 F at 1 A g(-1), which was almost four times higher than the carbon materials prepared by a straight HTC process.
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Affiliation(s)
- Shiping Wang
- Carbon Nano Materials Group, Center for Chemistry of High-performance and Novel Materials, Department of Chemistry, Zhejiang University, Hangzhou 310028, P. R. China.
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27
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Preiss LC, Landfester K, Muñoz-Espí R. Biopolymer colloids for controlling and templating inorganic synthesis. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2014; 5:2129-2138. [PMID: 25551041 PMCID: PMC4273287 DOI: 10.3762/bjnano.5.222] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2014] [Accepted: 10/29/2014] [Indexed: 05/31/2023]
Abstract
Biopolymers and biopolymer colloids can act as controlling agents and templates not only in many processes in nature, but also in a wide range of synthetic approaches. Inorganic materials can be either synthesized ex situ and later incorporated into a biopolymer structuring matrix or grown in situ in the presence of biopolymers. In this review, we focus mainly on the latter case and distinguish between the following possibilities: (i) biopolymers as controlling agents of nucleation and growth of inorganic materials; (ii) biopolymers as supports, either as molecular supports or as carrier particles acting as cores of core-shell structures; and (iii) so-called "soft templates", which include on one hand stabilized droplets, micelles, and vesicles, and on the other hand continuous scaffolds generated by gelling biopolymers.
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Affiliation(s)
- Laura C Preiss
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Katharina Landfester
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Rafael Muñoz-Espí
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
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28
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Hood MA, Mari M, Muñoz-Espí R. Synthetic Strategies in the Preparation of Polymer/Inorganic Hybrid Nanoparticles. MATERIALS (BASEL, SWITZERLAND) 2014; 7:4057-4087. [PMID: 28788665 PMCID: PMC5453225 DOI: 10.3390/ma7054057] [Citation(s) in RCA: 87] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Revised: 04/12/2014] [Accepted: 05/09/2014] [Indexed: 01/05/2023]
Abstract
This article reviews the recent advances and challenges in the preparation of polymer/inorganic hybrid nanoparticles. We mainly focus on synthetic strategies, basing our classification on whether the inorganic and the polymer components have been formed in situ or ex situ, of the hybrid material. Accordingly, four types of strategies are identified and described, referring to recent examples: (i) ex situ formation of the components and subsequent attachment or integration, either by covalent or noncovalent bonding; (ii) in situ polymerization in the presence of ex situ formed inorganic nanoparticles; (iii) in situ precipitation of the inorganic components on or in polymer structures; and (iv) strategies in which both polymer and inorganic component are simultaneously formed in situ.
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Affiliation(s)
- Matthew A Hood
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55118 Mainz, Germany.
| | - Margherita Mari
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55118 Mainz, Germany.
| | - Rafael Muñoz-Espí
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55118 Mainz, Germany.
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29
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Carraro M, Gross S. Hybrid Materials Based on the Embedding of Organically Modified Transition Metal Oxoclusters or Polyoxometalates into Polymers for Functional Applications: A Review. MATERIALS (BASEL, SWITZERLAND) 2014; 7:3956-3989. [PMID: 28788659 PMCID: PMC5453212 DOI: 10.3390/ma7053956] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/12/2014] [Revised: 04/22/2014] [Accepted: 04/25/2014] [Indexed: 11/16/2022]
Abstract
The covalent incorporation of inorganic building blocks into a polymer matrix to obtain stable and robust materials is a widely used concept in the field of organic-inorganic hybrid materials, and encompasses the use of different inorganic systems including (but not limited to) nanoparticles, mono- and polynuclear metal complexes and clusters, polyhedral oligomeric silsesquioxanes (POSS), polyoxometalates (POM), layered inorganic systems, inorganic fibers, and whiskers. In this paper, we will review the use of two particular kinds of structurally well-defined inorganic building blocks, namely transition metals oxoclusters (TMO) and polyoxometalates (POM), to obtain hybrid materials with enhanced functional (e.g., optical, dielectric, magnetic, catalytic) properties.
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Affiliation(s)
- Mauro Carraro
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, via Marzolo 1, I-35131 Padova, Italy.
- ITM-CNR, UOS di Padova, via Marzolo 1, I-35131 Padova, Italy.
| | - Silvia Gross
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, via Marzolo 1, I-35131 Padova, Italy.
- Istituto per l'Energetica e le Interfasi, IENI-CNR and INSTM, UdR Padova, via Marzolo 1, I-35131 Padova, Italy.
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30
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Butturini E, Dolcet P, Casarin M, Speghini A, Pedroni M, Benetti F, Motta A, Badocco D, Pastore P, Diodati S, Pandolfo L, Gross S. Simple, common but functional: biocompatible and luminescent rare-earth doped magnesium and calcium hydroxides from miniemulsion. J Mater Chem B 2014; 2:6639-6651. [DOI: 10.1039/c4tb01206b] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Highly luminescent Ca(OH)2:Ln and Mg(OH)2:Ln (Ln = EuIII, SmIII, TbIII, Mg(Ca)/Ln = 20 : 1) nanostructures were obtained in inverse miniemulsion by exploiting the droplets to spatially confine the hydroxide precipitation in basic environment.
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Affiliation(s)
- Erika Butturini
- Dipartimento di Scienze Chimiche
- Università degli Studi di Padova
- Padova, Italy
- Istituto per l’Energetica e le Interfasi
- IENI-CNR and INSTM
| | - Paolo Dolcet
- Dipartimento di Scienze Chimiche
- Università degli Studi di Padova
- Padova, Italy
- Istituto per l’Energetica e le Interfasi
- IENI-CNR and INSTM
| | - Maurizio Casarin
- Dipartimento di Scienze Chimiche
- Università degli Studi di Padova
- Padova, Italy
- Istituto per l’Energetica e le Interfasi
- IENI-CNR and INSTM
| | - Adolfo Speghini
- Dipartimento di Biotecnologie
- Università degli Studi di Verona and INSTM
- UdR Verona
- 37314 Verona, Italy
| | - Marco Pedroni
- Dipartimento di Biotecnologie
- Università degli Studi di Verona and INSTM
- UdR Verona
- 37314 Verona, Italy
| | - Filippo Benetti
- University of Trento
- Department of Industrial Engineering and BIOtech Research Center
- Trento, Italy
- European Institute of Excellence on Tissue Engineering and Regenerative Medicine
- Trento, Italy
| | - Antonella Motta
- University of Trento
- Department of Industrial Engineering and BIOtech Research Center
- Trento, Italy
- European Institute of Excellence on Tissue Engineering and Regenerative Medicine
- Trento, Italy
| | - Denis Badocco
- Dipartimento di Scienze Chimiche
- Università degli Studi di Padova
- Padova, Italy
| | - Paolo Pastore
- Dipartimento di Scienze Chimiche
- Università degli Studi di Padova
- Padova, Italy
| | - Stefano Diodati
- Dipartimento di Scienze Chimiche
- Università degli Studi di Padova
- Padova, Italy
- Istituto per l’Energetica e le Interfasi
- IENI-CNR and INSTM
| | - Luciano Pandolfo
- Dipartimento di Scienze Chimiche
- Università degli Studi di Padova
- Padova, Italy
| | - Silvia Gross
- Dipartimento di Scienze Chimiche
- Università degli Studi di Padova
- Padova, Italy
- Istituto per l’Energetica e le Interfasi
- IENI-CNR and INSTM
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Moshe H, Levi G, Mastai Y. Polymorphism stabilization by crystal adsorption on a self-assembled monolayer. CrystEngComm 2013. [DOI: 10.1039/c3ce41237g] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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