1
|
Pica M, Caroni J, D'Amato R, Gatti G, Paul G, Nocchetti M. Mixed Zirconium Phosphate Bis-Phosphonomethyl Glycine from Nanocrystalline α-Zirconium Phosphate: A Tailored Suite for Gold Nanoparticles. Inorg Chem 2023; 62:1394-1404. [PMID: 36653931 DOI: 10.1021/acs.inorgchem.2c03418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
A novel synthetic approach was investigated for the preparation of nanoplatelets of mixed zirconium phosphate bis-phosphonomethyl glycine, ZPGly, by the reaction of a gel of nanocrystalline α-type zirconium phosphate with N,N-bis-phosphonomethyl glycine, H3Gly. The syntheses were carried out in the absence of hydrofluoric acid by changing both the reagent relative amounts and temperature. An H3Gly/Zr molar ratio >2 did not significantly improve the degree of crystallinity of the materials, while an increase of temperature from 80 °C to 120 °C improved the crystallinity; the best result was obtained with H3Gly/Zr molar ratio = 2 and with a temperature reaction of 120 °C. The sample consisted of nanoplatelets with the size in the range 20-40 nm, and it was successfully exfoliated by treatment with a solution of methylamine. By treatment of the ZPGly colloidal dispersions with HAuCl4, a color change from white to red-violet was observed, indicating the formation of gold nanoparticles. The size and morphology of the gold particles were affected by the degree of crystallinity and, in turn, by the composition of the ZPGly support. As a matter of fact, large micrometric Au particles with a cubo-octahedral morphology were obtained by using the less crystalline ZPGly_R2-80 sample, while interconnected Au particles, with a size of about 16 nm, were obtained by using ZPGly_R2-120. The samples exhibited an absorption maximum in the visible region due to the surface plasmon resonance of gold nanoparticles.
Collapse
Affiliation(s)
- Monica Pica
- Department of Pharmaceutical Sciences, University of Perugia, Via Del Liceo, 1, Perugia06123, Italy
| | - Jonathan Caroni
- Department of Chemistry, Biology and Biotechnologies, University of Perugia, Via Elce di Sotto, 8, Perugia06123, Italy
| | - Roberto D'Amato
- Department of Chemistry, Biology and Biotechnologies, University of Perugia, Via Elce di Sotto, 8, Perugia06123, Italy
| | - Giorgio Gatti
- Department for the Sustainable Development and Ecological Transition, University of Eastern Piedmont, Piazza Sant'Eusebio 5, Vercelli13100, Italy
| | - Geo Paul
- Department of Sciences and Technological Innovation, University of Eastern Piedmont "A. Avogadro", Viale T. Michel 11, Alessandria15121, Italy
| | - Morena Nocchetti
- Department of Pharmaceutical Sciences, University of Perugia, Via Del Liceo, 1, Perugia06123, Italy
| |
Collapse
|
2
|
Arora P, Kumar P, Tomar V, Sillanpää M, Kumar Joshi R, Nemiwal M. C–N cross-coupling organic transformations catalyzed via copper oxide nanoparticles: A review (2016-present). INORG CHEM COMMUN 2022; 145:109982. [DOI: 10.1016/j.inoche.2022.109982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
3
|
Rotter H, Osovsky R, Hafif N, Pevzner A, Nir I. Nanostructured TiO 2/MCM-41-Functionalized PDMS as a Reactive Protective Barrier against Chemical Warfare Agents via Adsorption and Catalyzed Degradation. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c02107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hadar Rotter
- Department of Physical Chemistry, Israel Institute for Biological Research, P.O. Box 19, Ness Ziona 74100, Israel
| | - Ruth Osovsky
- Department of Physical Chemistry, Israel Institute for Biological Research, P.O. Box 19, Ness Ziona 74100, Israel
| | - Nir Hafif
- Department of Physical Chemistry, Israel Institute for Biological Research, P.O. Box 19, Ness Ziona 74100, Israel
| | - Alexander Pevzner
- Department of Physical Chemistry, Israel Institute for Biological Research, P.O. Box 19, Ness Ziona 74100, Israel
| | - Ido Nir
- Department of Physical Chemistry, Israel Institute for Biological Research, P.O. Box 19, Ness Ziona 74100, Israel
| |
Collapse
|
4
|
Wojcieszak R, Ghazzal MN. Getting Greener with the Synthesis of Nanoparticles and Nanomaterials. Nanomaterials 2022; 12:nano12142452. [PMID: 35889676 PMCID: PMC9323593 DOI: 10.3390/nano12142452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Accepted: 07/07/2022] [Indexed: 12/01/2022]
Affiliation(s)
- Robert Wojcieszak
- University Lille, CNRS, Centrale Lille, University Artois, UMR 8181-UCCS-Unité de Catalyse et Chimie du Solide, F-59000 Lille, France
- Correspondence:
| | - Mohamed Nawfal Ghazzal
- Institut de Chimie Physique, Université Paris-Saclay, CNRS, UMR 8000, F-91405 Orsay, France;
| |
Collapse
|
5
|
Janoš P, Ederer J, Štastný M, Tolasz J, Henych J. Degradation of parathion methyl by reactive sorption on the cerium oxide surface: The effect of solvent on the degradation efficiency. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.103852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
6
|
Vasilyeva IG, Vikulova ES, Morozova NB, Pochtar AA, Igumenov IK. Invisible Surface Oxygen Vacancies in a Thin MgO Film: Impacts on the Chemical Activity and Secondary Electron Emission. Inorg Chem 2020; 59:17999-18009. [PMID: 33269923 DOI: 10.1021/acs.inorgchem.0c02351] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Today, Fs defects in MgO as isolated surface neutral oxygen vacancies are in the focus of surface science, catalysis research, and emission coating of microchannel plates. With the 10-4 atom % content at 750 K and under pO2 = 10-9 Torr, estimated by us from the known equilibrium T-x and p-T-x diagrams of MgO, Fs defects remain invisible or difficult-to-detect objects. The MgO(100) → MgO(100) + Fs + 1/2O2 phase transition was studied in MgO films deposited by the metal-organic chemical vapor deposition (MOCVD) procedure from the mixed-ligand Mg precursor on Si substrates at 725 K in the O2 flow where the nonstoichiometric phase (MgO/Fs) is formed in the gas medium containing simultaneous H2, CO, H2O, CO, and O2 species in unbalanced concentrations. Realization of the above transition was proven theoretically and experimentally through kinetic-thermodynamic analysis of the nonequilibrium system with revealing thermodynamic motive forces, i.e., the positive enthalpy and entropy, as well as through a new combination of diagnostic methods including the original differential dissolution method, due to which separate determination of the point and morphological defects was achieved. It was found that Fs defects occur when oxygen in the immediate vicinity to the substrate surface is replaced practically completely by the oxidized products of the precursor and the resulting oxygen pressure becomes enough for this process. The 90 mass % of the as-deposited MgO-film-involved (MgO/Fs) phase; its chemical activity is demonstrated through dissolution in hot water, while the electron donor activity is through 9 at 750 eV secondary electron yield. A good understanding of gas-phase reactions between the precursors and oxygen provides the fundamental basis of the MOCVD process to deposit MgO films that are dense, free from carbon, and of homogeneous texture. This makes the MOCVD process suitable also for use as coatings of microchannel plates.
Collapse
Affiliation(s)
- Inga G Vasilyeva
- Nikolaev Institute of Inorganic Chemistry, Russian Academy of Sciences, Siberian Branch, Ac. Lavrentyev Avenue 3, Novosobirsk 630090, Russia
| | - Evgeniia S Vikulova
- Nikolaev Institute of Inorganic Chemistry, Russian Academy of Sciences, Siberian Branch, Ac. Lavrentyev Avenue 3, Novosobirsk 630090, Russia
| | - Natalia B Morozova
- Nikolaev Institute of Inorganic Chemistry, Russian Academy of Sciences, Siberian Branch, Ac. Lavrentyev Avenue 3, Novosobirsk 630090, Russia
| | - Alena A Pochtar
- Boreskov Institute of Catalysis, Russian Academy of Sciences, Siberian Branch, Ac. Lavrentyev Avenue 5, Novosibirsk 630090, Russia
| | - Igor K Igumenov
- Nikolaev Institute of Inorganic Chemistry, Russian Academy of Sciences, Siberian Branch, Ac. Lavrentyev Avenue 3, Novosobirsk 630090, Russia
| |
Collapse
|
7
|
Taghavi S, Amoozadeh A, Nemati F. Deep eutectic solvent‐assisted synthesis of highly efficient nanocatalyst (n‐TiO
2
@TDI@DES (ZnCl
2
:urea)) for chemoselective oxidation of sulfides to sulfoxides. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.6127] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Shaghayegh Taghavi
- Department of Organic Chemistry, Faculty of Chemistry Semnan University Semnan Iran
| | - Ali Amoozadeh
- Department of Organic Chemistry, Faculty of Chemistry Semnan University Semnan Iran
| | - Firouzeh Nemati
- Department of Organic Chemistry, Faculty of Chemistry Semnan University Semnan Iran
| |
Collapse
|
8
|
Fan H, Cui T, Rajendran A, Yang Q, Feng J, Yue X, Li W. Comparative study on the activities of different MgO surfaces in CO2 activation and hydrogenation. Catal Today 2020; 356:535-43. [DOI: 10.1016/j.cattod.2020.03.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
9
|
Korotcenkov G. Current Trends in Nanomaterials for Metal Oxide-Based Conductometric Gas Sensors: Advantages and Limitations. Part 1: 1D and 2D Nanostructures. Nanomaterials (Basel) 2020; 10:E1392. [PMID: 32708967 PMCID: PMC7407990 DOI: 10.3390/nano10071392] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/07/2020] [Revised: 07/07/2020] [Accepted: 07/13/2020] [Indexed: 01/05/2023]
Abstract
This article discusses the main uses of 1D and 2D nanomaterials in the development of conductometric gas sensors based on metal oxides. It is shown that, along with the advantages of these materials, which can improve the parameters of gas sensors, there are a number of disadvantages that significantly limit their use in the development of devices designed for the sensor market.
Collapse
Affiliation(s)
- Ghenadii Korotcenkov
- Department of Theoretical Physics, Moldova State University, MD-2009 Chisinau, Moldova
| |
Collapse
|
10
|
Borgohain X, Boruah A, Sarma GK, Rashid MH. Rapid and extremely high adsorption performance of porous MgO nanostructures for fluoride removal from water. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.112799] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
11
|
Li M, Liu W, Slaveykova VI. Effects of Mixtures of Engineered Nanoparticles and Metallic Pollutants on Aquatic Organisms. Environments 2020; 7:27. [DOI: 10.3390/environments7040027] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
In aquatic environment, engineered nanoparticles (ENPs) are present as complex mixtures with other pollutants, such as trace metals, which could result in synergism, additivity or antagonism of their combined effects. Despite the fact that the toxicity and environmental risk of the ENPs have received extensive attention in the recent years, the interactions of ENPs with other pollutants and the consequent effects on aquatic organisms represent an important challenge in (nano)ecotoxicology. The present review provides an overview of the state-of-the-art and critically discusses the existing knowledge on combined effects of mixtures of ENPs and metallic pollutants on aquatic organisms. The specific emphasis is on the adsorption of metallic pollutants on metal-containing ENPs, transformation and bioavailability of ENPs and metallic pollutants in mixtures. Antagonistic, additive and synergistic effects observed in aquatic organisms co-exposed to ENPs and metallic pollutants are discussed in the case of “particle-proof” and “particle-ingestive” organisms. This knowledge is important in developing efficient strategies for sound environmental impact assessment of mixture exposure in complex environments.
Collapse
|
12
|
Nazal MK, Khaled M, Atieh MA, Aljundi IH, Oweimreen GA, Abulkibash AM. The nature and kinetics of the adsorption of dibenzothiophene in model diesel fuel on carbonaceous materials loaded with aluminum oxide particles. ARAB J CHEM 2019. [DOI: 10.1016/j.arabjc.2015.12.003] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
|
13
|
Fichera O, Alpan L, Laloy J, Tabarrant T, Uhrner U, Ye Q, Mejia J, Dogné JM, Lucas S. Characterization of water-based paints containing titanium dioxide or carbon black as manufactured nanomaterials before and after atomization. Appl Nanosci 2019. [DOI: 10.1007/s13204-019-01030-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
14
|
Ederer J, Šťastný M, Došek M, Henych J, Janoš P. Mesoporous cerium oxide for fast degradation of aryl organophosphate flame retardant triphenyl phosphate. RSC Adv 2019; 9:32058-32065. [PMID: 35530782 PMCID: PMC9072973 DOI: 10.1039/c9ra06575j] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Accepted: 10/01/2019] [Indexed: 01/09/2023] Open
Abstract
Cerium oxide nanoparticles were prepared by calcination of basic cerous carbonate (as a precursor) obtained by precipitation from an aqueous solution. Prepared samples were characterized by X-ray diffraction (XRD), infrared spectroscopy (FTIR), high resolution scanning electron microscopy (HRSEM), BET (Brunauer–Emmett–Teller) surface area and porosity measurement. Prepared cerium oxide was applied as a destructive sorbent for the fast and safe degradation of organophosphorus flame retardant triphenyl phosphate (TPP). It was shown that cerium dioxide was effective in the decomposition of TPP by cleavage of the P–O–aryl bond in the flame retardant molecule. A degradation mechanism for TPP on the ceria surface was proposed. The degradation is governed by conversion of TPP via diphenyl phosphate (DPP) to the final product identified as phenol (Ph). The key parameter increasing the degradation efficiency of CeO2 is the temperature of calcination. At optimum calcination temperature (500 °C), the produced ceria retains a sufficiently high surface area and attains an optimum degree of crystallinity (related to a number of crystal defects, and thus potential reactive sites). The fast and efficient degradation of organophosphorus flame retardant TPP was observed in a polar aprotic solvent (acetonitrile) that is miscible with water. Cerium oxide nanoparticles were prepared by calcination of basic cerous carbonate (as a precursor) obtained by precipitation from an aqueous solution and subsequent tested for catalytic activity.![]()
Collapse
Affiliation(s)
- Jakub Ederer
- Faculty of Environment
- University of Jan Evangelista Purkyně
- 400 96 Ústí nad Labem
- Czech Republic
| | - Martin Šťastný
- Institute of Inorganic Chemistry of the Czech Academy of Sciences
- Czech Republic
| | - Marek Došek
- Faculty of Environment
- University of Jan Evangelista Purkyně
- 400 96 Ústí nad Labem
- Czech Republic
| | - Jiří Henych
- Faculty of Environment
- University of Jan Evangelista Purkyně
- 400 96 Ústí nad Labem
- Czech Republic
- Institute of Inorganic Chemistry of the Czech Academy of Sciences
| | - Pavel Janoš
- Faculty of Environment
- University of Jan Evangelista Purkyně
- 400 96 Ústí nad Labem
- Czech Republic
| |
Collapse
|
15
|
Henych J, Štengl V, Mattsson A, Tolasz J, Österlund L. Chemical warfare agent simulant DMMP reactive adsorption on TiO 2/graphene oxide composites prepared via titanium peroxo-complex or urea precipitation. J Hazard Mater 2018; 359:482-490. [PMID: 30075367 DOI: 10.1016/j.jhazmat.2018.07.095] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2018] [Revised: 06/29/2018] [Accepted: 07/23/2018] [Indexed: 05/14/2023]
Abstract
Two water-based methods were used to produce TiO2/graphene oxide (GO) nanocomposites with 1 and 2 wt.% GO. Both procedures exclude the use of organometallic precursors, as well as the high-pressure and high-temperature treatments, which facilitate pure and energy efficient synthesis amenable for larger scale synthesis. Nanocomposites with narrow (<10 nm) and long spindle-like (<100 nm) TiO2 nanoparticles supported on GO flakes were obtained (TiO2/GO), and their properties for reactive destruction of the organophosphorus simile chemical warfare agent (CWA) dimethyl methylphosphonate (DMMP) were investigated by in situ DRIFTS spectroscopy. Both synthesis procedures yielded highly reactive nanocomposites with markedly different properties compared to similarly prepared pure TiO2 nanoparticles. GO also induced morphology and texture changes, which were observed to have a significant impact on the adsorption and reactivity of the nanocomposites, and which were strongly related to synthesis procedure. In particular, the reduction state of GO, as measured by Raman spectroscopy, was observed to play a major role for the reactivity of the TiO2/GO nanocomposites.
Collapse
Affiliation(s)
- Jiří Henych
- Materials Chemistry Department, Institute of Inorganic Chemistry, Czech Academy of Sciences, Husinec-Řež 1001, 250 68 Řež, Czech Republic.
| | - Václav Štengl
- Materials Chemistry Department, Institute of Inorganic Chemistry, Czech Academy of Sciences, Husinec-Řež 1001, 250 68 Řež, Czech Republic
| | - Andreas Mattsson
- Department of Engineering Sciences, The Ångström Laboratory, Uppsala University, P.O. Box 534, SE-751 21 Uppsala, Sweden
| | - Jakub Tolasz
- Materials Chemistry Department, Institute of Inorganic Chemistry, Czech Academy of Sciences, Husinec-Řež 1001, 250 68 Řež, Czech Republic
| | - Lars Österlund
- Department of Engineering Sciences, The Ångström Laboratory, Uppsala University, P.O. Box 534, SE-751 21 Uppsala, Sweden
| |
Collapse
|
16
|
Komlev AA, Panchuk VV, Semenov VG, Almjasheva OV, Gusarov VV. Effect of the sequence of chemical transformations on the spatial segregation of components and formation of periclase-spinel nanopowders in the MgO–Fe2O3–H2O System. RUSS J APPL CHEM+ 2017. [DOI: 10.1134/s1070427216120028] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
17
|
Tabrizian E, Amoozadeh A. Sulfamic Acid-functionalized Nano-titanium dioxide as a Novel and Highly Efficient Heterogeneous Nanocatalyst for One-pot and Solvent-free Synthesis of Hexahydroquinolines. J CHIN CHEM SOC-TAIP 2017. [DOI: 10.1002/jccs.201600802] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Elham Tabrizian
- Department of Organic Chemistry, Faculty of Chemistry; Semnan University; Semnan 35131-19111 Iran
| | - Ali Amoozadeh
- Department of Organic Chemistry, Faculty of Chemistry; Semnan University; Semnan 35131-19111 Iran
| |
Collapse
|
18
|
El-Qanni A, Nassar NN, Vitale G. Experimental and computational modeling studies on silica-embedded NiO/MgO nanoparticles for adsorptive removal of organic pollutants from wastewater. RSC Adv 2017. [DOI: 10.1039/c7ra00615b] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
This study presents newly-prepared silica-embedded NiO/MgO nanoparticles with a new experimental and computational adsorption approach for wastewater treatment.
Collapse
Affiliation(s)
- Amjad El-Qanni
- Department of Chemical and Petroleum Engineering
- University of Calgary
- Calgary
- Canada
- Department of Chemical Engineering
| | - Nashaat N. Nassar
- Department of Chemical and Petroleum Engineering
- University of Calgary
- Calgary
- Canada
| | - Gerardo Vitale
- Department of Chemical and Petroleum Engineering
- University of Calgary
- Calgary
- Canada
| |
Collapse
|
19
|
Bisio C, Carniato F, Palumbo C, Safronyuk SL, Starodub MF, Katsev AM, Marchese L, Guidotti M. Nanosized inorganic metal oxides as heterogeneous catalysts for the degradation of chemical warfare agents. Catal Today 2016. [DOI: 10.1016/j.cattod.2015.12.023] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
20
|
Long JW, Wallace JM, Peterson GW, Huynh K. Manganese Oxide Nanoarchitectures as Broad-Spectrum Sorbents for Toxic Gases. ACS Appl Mater Interfaces 2016; 8:1184-1193. [PMID: 26741498 DOI: 10.1021/acsami.5b09508] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We demonstrate that sol-gel-derived manganese oxide (MnOx) nanoarchitectures exhibit broad-spectrum filtration activity for three chemically diverse toxic gases: NH3, SO2, and H2S. Manganese oxides are synthesized via the reaction of NaMnO4 and fumaric acid to form monolithic gels of disordered, mixed-valent Na-MnOx; incorporated Na(+) is readily exchanged for H(+) by subsequent acid rinsing to form a more crystalline H-MnOx phase. For both Na-MnOx and H-MnOx forms, controlled pore-fluid removal yields either densified, yet still mesoporous, xerogels or low-density aerogels (prepared by drying from supercritical CO2). The performance of these MnOx nanoarchitectures as filtration media is assessed using dynamic-challenge microbreakthrough protocols. We observe technologically relevant sorption capacities under both dry conditions and wet (80% relative humidity) for each of the three toxic industrial chemicals investigated. The Na-MnOx xerogels and aerogels provide optimal performance with the aerogel exhibiting maximum sorption capacities of 39, 200, and 680 mg g(-1) for NH3, SO2, and H2S, respectively. Postbreakthrough characterization using X-ray photoelectron spectroscopy (XPS) and diffuse-reflectance infrared Fourier transform spectroscopy (DRIFTS) confirms that NH3 is captured and partially protonated within the MnOx structure, while SO2 undergoes oxidation by the redox-active oxide to form adsorbed sulfate at the MnOx surface. Hydrogen sulfide is also oxidized to form a combination of sulfate and sulfur/polysulfide products, concomitant with a decrease in the average Mn oxidation state from 3.43 to 2.94 and generation of a MnOOH phase.
Collapse
Affiliation(s)
- Jeffrey W Long
- Code 6170, Surface Chemistry Branch, U.S. Naval Research Laboratory , Washington, D.C. 20375, United States
| | - Jean M Wallace
- Nova Research, Inc. , Alexandria, Virginia 22308, United States
| | - Gregory W Peterson
- U.S. Army Research, Development and Engineering Command, Edgewood Chemical Biological Center , Aberdeen Proving Ground, Maryland 21010, United States
| | - Kim Huynh
- Department of Chemistry and Biochemistry, University of Maryland , College Park, Maryland 20742, United States
| |
Collapse
|
21
|
Štengl V, Henych J, Janoš P, Skoumal M. Nanostructured Metal Oxides for Stoichiometric Degradation of Chemical Warfare Agents. Rev Environ Contam Toxicol 2016; 236:239-258. [PMID: 26423076 DOI: 10.1007/978-3-319-20013-2_4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Metal oxides have very important applications in many areas of chemistry, physics and materials science; their properties are dependent on the method of preparation, the morphology and texture. Nanostructured metal oxides can exhibit unique characteristics unlike those of the bulk form depending on their morphology, with a high density of edges, corners and defect surfaces. In recent years, methods have been developed for the preparation of metal oxide powders with tunable control of the primary particle size as well as of a secondary particle size: the size of agglomerates of crystallites. One of the many ways to take advantage of unique properties of nanostructured oxide materials is stoichiometric degradation of chemical warfare agents (CWAs) and volatile organic compounds (VOC) pollutants on their surfaces.
Collapse
Affiliation(s)
- Václav Štengl
- Material Chemistry Department, Institute of Inorganic Chemistry AS CR v.v.i., 250 68, Řež, Czech Republic.
| | - Jiří Henych
- Material Chemistry Department, Institute of Inorganic Chemistry AS CR v.v.i., 250 68, Řež, Czech Republic
| | - Pavel Janoš
- Faculty of the Environment, University of Jan Evangelista Purkyně, Králova Výšina 7, 400 96, Ústí nad Labem, Czech Republic
| | | |
Collapse
|
22
|
Tabrizian E, Amoozadeh A. A unique approach to magnetization of metal oxides: nano-Fe3O4@TDI@TiO2 as a highly efficient, magnetically separable and recyclable heterogeneous nanocatalyst. Catal Sci Technol 2016. [DOI: 10.1039/c6cy00316h] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nano-Fe3O4@TDI@TiO2 as a novel heterogeneous nanocatalyst is synthesized by covalent linkage of n-Fe3O4 and n-TiO2 through TDI.
Collapse
Affiliation(s)
- Elham Tabrizian
- Department of Organic Chemistry
- Faculty of Chemistry
- Semnan University
- Semnan 35131-19111
- Iran
| | - Ali Amoozadeh
- Department of Organic Chemistry
- Faculty of Chemistry
- Semnan University
- Semnan 35131-19111
- Iran
| |
Collapse
|
23
|
Tabrizian E, Amoozadeh A. A new type of SO3H-functionalized magnetic-titania as a robust magnetically-recoverable solid acid nanocatalyst for multi-component reactions. RSC Adv 2016. [DOI: 10.1039/c6ra21048a] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This paper highlights a novel synthetic strategy for the preparation of robust and magnetically-recoverable solid acid nanocatalysts.
Collapse
Affiliation(s)
- Elham Tabrizian
- Department of Organic Chemistry
- Faculty of Chemistry
- Semnan University
- Semnan 35131-19111
- Iran
| | - Ali Amoozadeh
- Department of Organic Chemistry
- Faculty of Chemistry
- Semnan University
- Semnan 35131-19111
- Iran
| |
Collapse
|
24
|
Baur GB, Yuranov I, Kiwi-Minsker L. Activated carbon fibers modified by metal oxide as effective structured adsorbents for acetaldehyde. Catal Today 2015. [DOI: 10.1016/j.cattod.2014.11.021] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
25
|
Tabrizian E, Amoozadeh A, Rahmani S, Salehi M, Kubicki M. Synthesis, characterization, and crystal structures of α, α′-bis(substituted-benzylidene)cycloalkanone derivatives by nano-TiO2/HOAc. Res Chem Intermed 2016; 42:531-44. [DOI: 10.1007/s11164-015-2039-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
26
|
Baumann SO, Schneider J, Sternig A, Thomele D, Stankic S, Berger T, Grönbeck H, Diwald O. Size effects in MgO cube dissolution. Langmuir 2015; 31:2770-6. [PMID: 25668706 DOI: 10.1021/la504651v] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Stability parameters and dissolution behavior of engineered nanomaterials in aqueous systems are critical to assess their functionality and fate under environmental conditions. Using scanning electron microscopy, transmission electron microscopy, and X-ray diffraction, we investigated the stability of cubic MgO particles in water. MgO dissolution proceeding via water dissociation at the oxide surface, disintegration of Mg(2+)-O(2-) surface elements, and their subsequent solvation ultimately leads to precipitation of Mg(OH)2 nanosheets. At a pH ≥ 10, MgO nanocubes with a size distribution below 10 nm quantitatively dissolve within few minutes and convert into Mg(OH)2 nanosheets. This effect is different from MgO cubes originating from magnesium combustion in air. With a size distribution in the range 10 nm ≤ d ≤ 1000 nm they dissolve with a significantly smaller dissolution rate in water. On these particles water induced etching generates (110) faces which, above a certain face area, dissolve at a rate equal to that of (100) planes.1 The delayed solubility of microcrystalline MgO is attributed to surface hydroxide induced self-inhibition effects occurring at the (100) and (110) microplanes. The present work underlines the importance of morphology evolution and surface faceting of engineered nanomaterials particles during their dissolution.
Collapse
Affiliation(s)
- Stefan O Baumann
- Institute of Particle Technology, Friedrich-Alexander Universität Erlangen-Nürnberg , Cauerstrasse 4, 91058 Erlangen, Germany
| | | | | | | | | | | | | | | |
Collapse
|
27
|
Reddy PV, Annapurna M, Srinivas P, Likhar PR, Lakshmi Kantam M. Nanocrystalline magnesium oxide-stabilized palladium(0): an efficient and reusable catalyst for synthesis of N-(2-pyridyl)indoles. NEW J CHEM 2015. [DOI: 10.1039/c5nj00074b] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis of N-(2-pyridyl)indoles by NAP–Mg–Pd(0) catalyzed oxidative coupling between N-aryl-2-aminopyridines and alkynes.
Collapse
Affiliation(s)
| | - Manne Annapurna
- I & PC Division
- CSIR-Indian Institute of Chemical Technology
- Hyderabad – 500 607
- India
| | | | - Pravin R. Likhar
- I & PC Division
- CSIR-Indian Institute of Chemical Technology
- Hyderabad – 500 607
- India
| | | |
Collapse
|
28
|
Hajipour AR, Dordahan F, Rafiee F, Mahdavi M. C-N cross-coupling reaction catalysed by efficient and reusable CuO/SiO2
nanoparticles under ligand-free conditions. Appl Organomet Chem 2014. [DOI: 10.1002/aoc.3203] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Abdol R. Hajipour
- Pharmaceutical Research Laboratory, Department of Chemistry; Isfahan University of Technology; Isfahan 84156 IR Iran
| | - Fatemeh Dordahan
- Pharmaceutical Research Laboratory, Department of Chemistry; Isfahan University of Technology; Isfahan 84156 IR Iran
| | - Fatemeh Rafiee
- Department of Chemistry, Faculty of Science; Alzahra University; Vanak Tehran IR Iran
| | - Mohammad Mahdavi
- Catalysis Research Laboratory, Department of Chemistry; Isfahan University; Isfahan 81746-73441 IR Iran
| |
Collapse
|
29
|
Baharfar R, Shariati N. An efficient one-pot synthesis of novel isatin-based 2-amino thiazol-4-one conjugates using MgO nanoparticles in aqueous media. CR CHIM 2014. [DOI: 10.1016/j.crci.2013.08.010] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
30
|
Janos P, Kuran P, Kormunda M, Stengl V, Grygar TM, Dosek M, Stastny M, Ederer J, Pilarova V, Vrtoch L. Cerium dioxide as a new reactive sorbent for fast degradation of parathion methyl and some other organophosphates. J RARE EARTH 2014; 32:360-70. [DOI: 10.1016/s1002-0721(14)60079-x] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
31
|
Dadvar S, Tavanai H, Morshed M, Ghiaci M. A study on the kinetics of 2-chloroethyl ethyl sulfide adsorption onto nanocomposite activated carbon nanofibers containing metal oxide nanoparticles. Sep Purif Technol 2013; 114:24-30. [DOI: 10.1016/j.seppur.2013.04.019] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
32
|
Qu X, Alvarez PJJ, Li Q. Applications of nanotechnology in water and wastewater treatment. Water Res 2013; 47:3931-46. [PMID: 23571110 DOI: 10.1016/j.watres.2012.09.058] [Citation(s) in RCA: 768] [Impact Index Per Article: 69.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2012] [Revised: 09/08/2012] [Accepted: 09/11/2012] [Indexed: 05/20/2023]
Abstract
Providing clean and affordable water to meet human needs is a grand challenge of the 21st century. Worldwide, water supply struggles to keep up with the fast growing demand, which is exacerbated by population growth, global climate change, and water quality deterioration. The need for technological innovation to enable integrated water management cannot be overstated. Nanotechnology holds great potential in advancing water and wastewater treatment to improve treatment efficiency as well as to augment water supply through safe use of unconventional water sources. Here we review recent development in nanotechnology for water and wastewater treatment. The discussion covers candidate nanomaterials, properties and mechanisms that enable the applications, advantages and limitations as compared to existing processes, and barriers and research needs for commercialization. By tracing these technological advances to the physicochemical properties of nanomaterials, the present review outlines the opportunities and limitations to further capitalize on these unique properties for sustainable water management.
Collapse
Affiliation(s)
- Xiaolei Qu
- Department of Civil and Environmental Engineering, Rice University, Houston, TX 77005, USA
| | | | | |
Collapse
|
33
|
Kantam ML, Reddy CV, Srinivas P, Bhargava S. Recent Developments in Recyclable Copper Catalyst Systems for C–N Bond Forming Cross-Coupling Reactions Using Aryl Halides and Arylboronic Acids. TOP ORGANOMETAL CHEM 2013. [DOI: 10.1007/3418_2012_58] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|
34
|
Cadigan CA, Corpuz AR, Lin F, Caskey CM, Finch KBH, Wang X, Richards RM. Nanoscale (111) faceted rock-salt metal oxides in catalysis. Catal Sci Technol 2013. [DOI: 10.1039/c2cy20373a] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
35
|
Pal P, Pahari SK, Sinhamahapatra A, Giri AK, Bajaj HC, Panda AB. Porous cesium impregnated MgO (Cs–MgO) nanoflakes with excellent catalytic activity for highly selective rapid synthesis of flavanone. RSC Adv 2013. [DOI: 10.1039/c2ra23171a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
|
36
|
Kantam ML, Redddy PV, Srinivas P, Venugopal A, Bhargava S, Nishina Y. Nanocrystalline magnesium oxide-stabilized palladium(0): the Heck reaction of heteroaryl bromides in the absence of additional ligands and base. Catal Sci Technol 2013. [DOI: 10.1039/c3cy00404j] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
|
37
|
Karmakar B, Nayak A, Banerji J. A clean and expedient synthesis of spirooxindoles in aqueous media catalyzed over nanocrystalline MgO. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.07.030] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
38
|
Baltrusaitis J, Hatch C, Orlando R. Periodic DFT study of acidic trace atmospheric gas molecule adsorption on Ca- and Fe-doped MgO(001) surface basic sites. J Phys Chem A 2012; 116:7950-8. [PMID: 22775293 PMCID: PMC3498610 DOI: 10.1021/jp3041988] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The electronic properties of undoped and Ca- or Fe-doped MgO(001) surfaces, as well as their propensity toward atmospheric acidic gas (CO2, SO2, and NO2) uptake was investigated with an emphasis on gas adsorption on the basic MgO oxygen surface sites, O(surf), using periodic density functional theory (DFT) calculations. Adsorption energy calculations show that MgO doping will provide stronger interactions of the adsorbate with the O(surf) sites than the undoped MgO for a given adsorbate molecule. Charge transfer from the iron atom in Fe-doped MgO(001) to NO2 was shown to increase the binding interaction between adsorbate by an order of magnitude, when compared to that of undoped and Ca-doped MgO(001) surfaces. Secondary binding interactions of adsorbate oxygen atoms were observed with surface magnesium sites at distances close to those of the Mg-O bond within the crystal. These interactions may serve as a preliminary step for adsorption and facilitate further adsorbate transformations into other binding configurations. Impacts on global atmospheric chemistry are discussed as these adsorption phenomena can affect atmospheric gas budgets via altered partitioning and retention on mineral aerosol surfaces.
Collapse
Affiliation(s)
- Jonas Baltrusaitis
- Departments of Chemistry and Chemical and Biochemical Engineering, University of Iowa , Iowa City, Iowa 52242, United States
| | | | | |
Collapse
|
39
|
Kantam ML, Priyadarshini S, Amal Joseph P, Srinivas P, Vinu A, Klabunde K, Nishina Y. Catalytic guanylation of aliphatic, aromatic, heterocyclic primary and secondary amines using nanocrystalline zinc(II) oxide. Tetrahedron 2012; 68:5730-7. [DOI: 10.1016/j.tet.2012.05.044] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
40
|
Zhu K, Hua W, Deng W, Richards RM. Preparation of MgO Nanosheets with Polar (111) Surfaces by Ligand Exchange and Esterification - Synthesis, Structure, and Application as Catalyst Support. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201200052] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
41
|
Yang YJ, Li W, Chen X. Highly enhanced electrocatalytic oxidation of glucose on Cu(OH)2/CuO nanotube arrays modified copper electrode. J Solid State Electrochem 2012; 16:2877-81. [DOI: 10.1007/s10008-012-1718-3] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
42
|
Alinezhad H, Tajbakhsh M, Salehian F, Biparva P. Synthesis of Quinoxaline Derivatives Using TiO2Nanoparticles as an Efficient and Recyclable Catalyst. B KOREAN CHEM SOC 2011. [DOI: 10.5012/bkcs.2011.32.10.3720] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
43
|
S P, Berchmans S. Copper oxide-modified glassy carbon electrode prepared through copper hexacyanoferrate–G5-PAMAM dendrimer templates as electrocatalyst for carbohydrate and alcohol oxidation. J Solid State Electrochem 2011. [DOI: 10.1007/s10008-011-1537-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
44
|
Prasad G, Ramacharyulu P, Singh B, Batra K, Srivastava AR, Ganesan K, Vijayaraghavan R. Sun light assisted photocatalytic decontamination of sulfur mustard using ZnO nanoparticles. ACTA ACUST UNITED AC 2011; 349:55-62. [DOI: 10.1016/j.molcata.2011.08.018] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
45
|
Karmakar B, Banerji J. A competent pot and atom-efficient synthesis of Betti bases over nanocrystalline MgO involving a modified Mannich type reaction. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.07.075] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
46
|
Paušová Š, Krýsa J, Jirkovský J, Forano C, Prevot V, Mailhot G. Photocatalytic properties of aqueous systems containing TiO2 nanoparticles. Catal Today 2011; 161:140-6. [DOI: 10.1016/j.cattod.2010.11.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
47
|
Chintareddy VR, Lakshmi Kantam M. Recent Developments on Catalytic Applications of Nano-Crystalline Magnesium Oxide. Catal Surv Asia 2011. [DOI: 10.1007/s10563-011-9113-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
48
|
Shen XJ, Yang JP, Liu Y, Luo YS, Fu SY. Facile surfactant-free synthesis of monodisperse Ni particles via a simple solvothermal method and their superior catalytic effect on thermal decomposition of ammonium perchlorate. NEW J CHEM 2011. [DOI: 10.1039/c0nj00987c] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
49
|
Prasad GK, Ramacharyulu PVRK, Batra K, Singh B, Srivastava AR, Ganesan K, Vijayaraghavan R. Decontamination of Yperite using mesoporous mixed metal oxide nanocrystals. J Hazard Mater 2010; 183:847-852. [PMID: 20800349 DOI: 10.1016/j.jhazmat.2010.07.104] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2010] [Revised: 07/16/2010] [Accepted: 07/27/2010] [Indexed: 05/29/2023]
Abstract
Mixed metal oxide nanocrystals of AP-Al(2)O(3), AP-Al(2)O(3)-Fe(2)O(3), AP-Al(2)O(3)-V(2)O(5) and AP-Al(2)O(3)-CuO have been prepared by aerogel process. XRD data of prepared materials revealed the formation of nanocrystals with a size range of 3-15 nm diameters. N(2) BET investigations on these materials revealed larger values of surface area ranging from 350 to 540 m(2)/g. Reactivity of these nanocrystalline materials against Yperite was examined by gas chromatography, gas chromatography-mass spectrometry and infrared spectroscopy techniques. AP-Al(2)O(3)-Fe(2)O(3), AP-Al(2)O(3)-V(2)O(5) and AP-Al(2)O(3)-CuO nanocrystals exhibited superior decontamination properties against Yperite than AP-Al(2)O(3). The reactions exhibited pseudo first order behaviour. 100% of Yperite was found to be decontaminated on Al(2)O(3)-Fe(2)O(3), Al(2)O(3)-V(2)O(5) and Al(2)O(3)-CuO where only 75% of the same was found to be decontaminated on AP-Al(2)O(3) within 40 h.
Collapse
Affiliation(s)
- G K Prasad
- Defence Research and Development Establishment, Jhansi Road, Gwalior 474002, Andhra Pradesh, India.
| | | | | | | | | | | | | |
Collapse
|
50
|
Abstract
MgO hollow nanospheres were produced via one-step laser synthesis in both gas and liquid media. The formation mechanism of MgO hollow nanospheres was investigated by adopting high-speed photography and performing control experiments under different oxidization conditions. The results indicated that the in situ Kirkendall effect is responsible for the formation of the hollow nanospheres. Blue emission was observed from the MgO hollow nanospheres produced in a liquid medium, and is ascribed to the surface state arising from the organic modification.
Collapse
Affiliation(s)
- Kai-Yang Niu
- School of Materials Science and Engineering, Tianjin University, Tianjin 300072, People's Republic of China
| | | | | | | |
Collapse
|