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Chandel M, Ghosh BK, Moitra D, Patra MK, Vadera SR, Ghosh NN. Synthesis of Various Ferrite (MFe₂O₄) Nanoparticles and Their Application as Efficient and Magnetically Separable Catalyst for Biginelli Reaction. J Nanosci Nanotechnol 2018; 18:2481-2492. [PMID: 29442917 DOI: 10.1166/jnn.2018.14345] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Herein, we reports the application of various spinel ferrite nanoparticles, MFe2O4 (M = Co, Ni, Cu, Zn), as efficient catalyst for Biginelli reaction. All ferrite nanoparticles were synthesized using a novel aqueous solution based method. It was observed that, the catalytic activity of the ferrite nanoparticles followed the decreasing order of CoFe2O4 > CuFe2O4 > NiFe2O4 > ZnFe2O4. The most important feature of these ferrite nanocatalysts is that, these nanoparticles can directly be used as catalyst and no surface modification or functionalization is required. These ferrite nanoparticles are easily separable from reaction mixture after reaction by using a magnet externally. Easy synthesis methodology, high catalytic activity, easy magnetic separation and good reusability make these ferrite nanoparticles attractive catalysts for Biginelli reaction.
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Affiliation(s)
- Madhurya Chandel
- Nano-Materials Laboratory, Department of Chemistry, Birla Institute of Technology and Science, Pilani K. K. Birla Goa Campus, Zuarinagar, Goa 403726, India
| | - Barun Kumar Ghosh
- Nano-Materials Laboratory, Department of Chemistry, Birla Institute of Technology and Science, Pilani K. K. Birla Goa Campus, Zuarinagar, Goa 403726, India
| | - Debabrata Moitra
- Nano-Materials Laboratory, Department of Chemistry, Birla Institute of Technology and Science, Pilani K. K. Birla Goa Campus, Zuarinagar, Goa 403726, India
| | | | | | - Narendra Nath Ghosh
- Nano-Materials Laboratory, Department of Chemistry, Birla Institute of Technology and Science, Pilani K. K. Birla Goa Campus, Zuarinagar, Goa 403726, India
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Saini L, Patra MK, Dhaka MK, Jani RK, Gupta GK, Dixit A, Vadera SR. Ni/graphitic carbon core–shell nanostructure-based light weight elastomeric composites for Ku-band microwave absorption applications. CrystEngComm 2018. [DOI: 10.1039/c8ce00620b] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [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
Graphitic carbon-coated Ni metal core nanoparticles with respective reflection loss for different thickness of Ni/C and rubber composites.
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Affiliation(s)
- Lokesh Saini
- Materials Development Group
- Defence Laboratory
- Jodhpur-342011
- India
- Department of Physics & Center for Solar Energy
| | | | | | - Raj Kumar Jani
- Materials Development Group
- Defence Laboratory
- Jodhpur-342011
- India
| | - Goutam Kumar Gupta
- Department of Physics & Center for Solar Energy
- Indian Institute of Technology Jodhpur
- Jodhpur-342037
- India
| | - Ambesh Dixit
- Department of Physics & Center for Solar Energy
- Indian Institute of Technology Jodhpur
- Jodhpur-342037
- India
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Saini L, Patra MK, Jani RK, Gupta GK, Dixit A, Vadera SR. Tunable Twin Matching Frequency (f m1/f m2) Behavior of Ni 1-xZn xFe 2O 4/NBR Composites over 2-12.4 GHz: A Strategic Material System for Stealth Applications. Sci Rep 2017; 7:44457. [PMID: 28294151 PMCID: PMC5353733 DOI: 10.1038/srep44457] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [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: 11/18/2016] [Accepted: 02/07/2017] [Indexed: 11/09/2022] Open
Abstract
The gel to carbonate precipitate route has been used for the synthesis of Ni1-xZnxFe2O4 (x = 0, 0.25, 0.5 and 0.75) bulk inverse spinel ferrite powder samples. The optimal zinc (50%) substitution has shown the maximum saturation magnetic moment and resulted into the maximum magnetic loss tangent (tanδm) > -1.2 over the entire 2-10 GHz frequency range with an optimum value ~-1.75 at 6 GHz. Ni0.5Zn0.5Fe2O4- Acrylo-Nitrile Butadiene Rubber (NBR) composite samples are prepared at different weight percentage (wt%) of ferrite loading fractions in rubber for microwave absorption evaluation. The 80 wt% loaded Ni0.5Zn0.5Fe2O4/NBR composite (FMAR80) sample has shown two reflection loss (RL) peaks at 5 and 10 GHz. Interestingly, a single peak at 10 GHz for 3.25 mm thickness, can be scaled down to 5 GHz by increasing the thickness up to 4.6 mm. The onset of such twin matching frequencies in FMAR80 composite sample is attributed to the spin resonance relaxation at ~5 GHz (fm1) and destructive interference at λm/4 matched thickness near ~10 GHz (fm2) in these composite systems. These studies suggest the potential of tuning the twin frequencies in Ni0.5Zn0.5Fe2O4/NBR composite samples for possible microwave absorption applications.
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Affiliation(s)
- Lokesh Saini
- Camouglage Division, Defence Laboratory, Ratanada Palace, Jodhpur-342011, India.,Department of Physics &Center for Solar Energy, Indian Institute of Technology Jodhpur, Old Residency Road, Jodhpur-342011, India
| | - Manoj Kumar Patra
- Camouglage Division, Defence Laboratory, Ratanada Palace, Jodhpur-342011, India
| | - Raj Kumar Jani
- Camouglage Division, Defence Laboratory, Ratanada Palace, Jodhpur-342011, India
| | - Goutam Kumar Gupta
- Department of Physics &Center for Solar Energy, Indian Institute of Technology Jodhpur, Old Residency Road, Jodhpur-342011, India
| | - Ambesh Dixit
- Department of Physics &Center for Solar Energy, Indian Institute of Technology Jodhpur, Old Residency Road, Jodhpur-342011, India
| | - Sampat Raj Vadera
- Camouglage Division, Defence Laboratory, Ratanada Palace, Jodhpur-342011, India
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Moitra D, Chandel M, Ghosh BK, Jani RK, Patra MK, Vadera SR, Ghosh NN. A simple ‘in situ’ co-precipitation method for the preparation of multifunctional CoFe2O4–reduced graphene oxide nanocomposites: excellent microwave absorber and highly efficient magnetically separable recyclable photocatalyst for dye degradation. RSC Adv 2016. [DOI: 10.1039/c6ra17384e] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [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] Open
Abstract
Here, an ‘in situ’ co-precipitation reaction method has been reported for the preparation of CoFe2O4–RGO (CF–RGO) nanocomposites.
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Affiliation(s)
- Debabrata Moitra
- Nanomaterials Lab
- Department of Chemistry
- Birla Institute of Technology and Science
- Zuarinagar
- India
| | - Madhurya Chandel
- Nanomaterials Lab
- Department of Chemistry
- Birla Institute of Technology and Science
- Zuarinagar
- India
| | - Barun Kumar Ghosh
- Nanomaterials Lab
- Department of Chemistry
- Birla Institute of Technology and Science
- Zuarinagar
- India
| | | | | | | | - Narendra Nath Ghosh
- Nanomaterials Lab
- Department of Chemistry
- Birla Institute of Technology and Science
- Zuarinagar
- India
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Hazra S, Ghosh BK, Patra MK, Jani RK, Vadera SR, Ghosh NN. One-Pot Synthesis of (NiFe2O4)x-(SrFe12O19)1-x Nanocomposites and Their Microwave Absorption Properties. J Nanosci Nanotechnol 2015; 15:6559-6567. [PMID: 26716212 DOI: 10.1166/jnn.2015.10491] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
In this paper, we report a simple but novel aqueous solution based 'one-pot' method for preparation of (NiFe2O4)x-(SrFe12O19)1-x nanocomposites consist of hard ferrite-soft ferrite phases. A physical mixing method has also been employed to prepare nanocomposites having same compositions. The effects of synthetic methodologies on the microstructures of the nanocomposites as well as their magnetic and microwave absorption properties have been evaluated. Crystal structures and microstructures of these composites have been investigated by using X-ray diffraction, transmission electron microscope and scanning electron microscope. In the nanocomposites, prepared by both methods, presence of nanocrystalline NiFe2O4 and SrFe12O19 phases was detected. However, nanocomposites, prepared by one-pot method, possessed better homogeneous distribution of hard and soft ferrite phases than the nanocomposites, prepared by physical mixing method. Nanocomposites, prepared by one-pot method, demonstrated significant spring exchange coupling interaction between hard and soft ferrite phases and exhibited magnetically single phase behaviour. The spring exchange coupling interaction enhanced the magnetic properties (high saturation magnetization and coercivity) and microwave absorption properties of the nanocomposites, prepared by one-pot method, in comparison with the nanocomposites prepared by physical mixing method as well as pure NiFe2O4 and SrFe12O19 nanoparticles. Minimum reflection loss of the composite was ~ -17 dB (i.e., 98% absorption) at 8.2 GHz for an absorber thickness of 3.2 mm.
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Hazra S, Ghosh BK, Patra MK, Jani RK, Vadera SR, Ghosh NN. A novel ‘one-pot’ synthetic method for preparation of (Ni0.65Zn0.35Fe2O4)x–(BaFe12O19)1−x nanocomposites and study of their microwave absorption and magnetic properties. POWDER TECHNOL 2015. [DOI: 10.1016/j.powtec.2015.03.046] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Naik B, Hazra S, Desagani D, Ghosh BK, Patra MK, Vadera SR, Ghosh NN. Preparation of a magnetically separable CoFe2O4supported Ag nanocatalyst and its catalytic reaction towards the decolorization of a variety of dyes. RSC Adv 2015. [DOI: 10.1039/c5ra00298b] [Citation(s) in RCA: 18] [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: 11/21/2022] Open
Abstract
CoFe2O4supported Ag nanoparticles were investigated as a catalyst for the decolorization of 4-nitrophenol, Congo red, rhodamine B and dye mixtures.
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Affiliation(s)
- Bhanudas Naik
- Departamento de Química
- Universidade Federal de Santa Maria
- Santa Maria
- Brazil
| | - Subhenjit Hazra
- Nanomaterials Lab
- Department of Chemistry
- Birla Institute of Technology and Science, Pilani
- Goa-403726
- India
| | - Dayananda Desagani
- Nanomaterials Lab
- Department of Chemistry
- Birla Institute of Technology and Science, Pilani
- Goa-403726
- India
| | - Barun Kumar Ghosh
- Nanomaterials Lab
- Department of Chemistry
- Birla Institute of Technology and Science, Pilani
- Goa-403726
- India
| | | | | | - Narendra Nath Ghosh
- Nanomaterials Lab
- Department of Chemistry
- Birla Institute of Technology and Science, Pilani
- Goa-403726
- India
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Hazra S, Ghosh BK, Joshi HR, Patra MK, Jani RK, Vadera SR, Ghosh NN. Development of a novel one-pot synthetic method for the preparation of (Mn0.2Ni0.4Zn0.4Fe2O4)x–(BaFe12O19)1−xnanocomposites and the study of their microwave absorption and magnetic properties. RSC Adv 2014. [DOI: 10.1039/c4ra07145j] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Shukla A, Patra MK, Mathew M, Songara S, Singh VK, Gowd GS, Vadera SR, Kumar N. Preparation and Characterization of Biocompatible and Water-Dispersible Superparamagnetic Iron Oxide Nanoparticles (SPIONs). ACTA ACUST UNITED AC 2010. [DOI: 10.1166/asl.2010.1103] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Manzoor K, Aditya V, Vadera SR, Kumar N, Kutty TRN. A single-source solid-precursor method for making eco-friendly doped semiconductor nanoparticles emitting multi-color luminescence. J Nanosci Nanotechnol 2007; 7:463-73. [PMID: 17450780 DOI: 10.1166/jnn.2007.149] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
A novel synthesis method is presented for the preparation of eco-friendly, doped semiconductor nanocrystals encapsulated within oxide-shells, both formed sequentially from a single-source solid-precursor. Highly luminescent ZnS nanoparticles, in situ doped with Cu(+)-Al3+ pairs and encapsulated with ZnO shells are prepared by the thermal decomposition of a solid-precursor compound, zinc sulfato-thiourea-oxyhydroxide, showing layered crystal structure. The precursor compound is prepared by an aqueous wet-chemical reaction involving necessary chemical reagents required for the precipitation, doping and inorganic surface capping of the nanoparticles. The elemental analysis (C, H, N, S, O, Zn), quantitative estimation of different chemical groups (SO4(2-) and NH4(-)) and infrared studies suggested that the precursor compound is formed by the intercalation of thiourea, and/or its derivatives thiocarbamate (CSNH2(-)), dithiocarbamate (CS2NH2(-)), etc., and ammonia into the gallery space of zinc-sulfato-oxyhydroxide corbel where the Zn(II) ions are both in the octahedral as well as tetrahedral coordination in the ratio 3 : 2 and the dopant ions are incorporated within octahedral voids. The powder X-ray diffraction of precursor compound shows high intensity basal reflection corresponding to the large lattice-plane spacing of d = 11.23 angstroms and the Rietveld analysis suggested orthorhombic structure with a = 9.71 angstroms, b = 12.48 angstroms, c = 26.43 angstroms, and beta = 90 degrees. Transmission electron microscopy studies show the presence of micrometer sized acicular monocrystallites with prismatic platy morphology. Controlled thermolysis of the solid-precursor at 70-110 degrees C leads to the collapse of layered structure due to the hydrolysis of interlayer thiourea molecules or its derivatives and the S2- ions liberated thereby reacts with the tetrahedral Zn(II) atoms leading to the precipitation of ZnS nanoparticles at the gallery space. During this process, the dopant ions situated at octahedral voids gets incorporated into the nano-ZnS lattice and results in bright photoluminescence. On further heat treatment above 1100 degrees C, the corbel zinc-oxyhydroxide sheets undergo dehydroxylation to form ZnO which eventually encapsulates the ZnS nanoparticles at the gallery leading to significant enhancement in the luminescence quantum efficiency, up to approximately 22%. The emission color of thus formed nano-ZnS/micro-ZnO composites could be tuned over wide spectral ranges from 480 to 618 nm and the spectral changes are attributed to a number of factors including lattice defects, Cu(+)-Al3+ dopant-pairs and iso-electronic oxygen in nano-ZnS and oxygen-vacancy or -interstitial centers in non-stoichiometric ZnO.
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Affiliation(s)
- K Manzoor
- Materials Development Group, Defence Laboratory, Jodhpur 342 011, Rajasthan, India
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