Adhish Jaiswal

Adhish Jaiswal
University of Lucknow · Department of Chemistry

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20
Publications
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Publications

Publications (20)
Article
Adsorption and photodegradation efficiency of α-MoO3 microfibers towards methylene blue (MB) dye in the aqueous solution were reported. To obtain high-quality α-MoO3 microfibers, an aqueous solution of (NH4)6Mo7O24∙4H2O and citric acid was hydrothermally treated (180 °C, 12 h) in the presence of HNO3. The possible growth mechanism of microfibers in...
Article
Herein, we have synthesized covellite, copper sulfide nanoparticles (CuS NPs) as an excellent Fenton-like catalyst via facile precipitation method. We studied the structural and compositional changes of CuS Fenton-like catalyst before and after Fenton reaction, in dark and visible light conditions. CuS catalyst exhibited cationic dyes (methylene bl...
Article
Room temperature nanoscale cation exchange reactions (CER), acts as a versatile tool and alternative to the tedious traditional approaches for colorimetric detection of heavy metal ions in water samples. Herein, we report selective and sensitive CER in aqueous starch capped ZnS nanoparticle (NPs) as colorimetric sensor for detection and estimation...
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Ultrasmall starch-capped CuS quantum dots (QDs) with controllable size were chemically fabricated in an aqueous medium. The phase of the CuS QDs was confirmed via X-ray diffraction (XRD), whereas the characteristic localized surface plasmon resonance (LSPR) peak in the near-infrared (NIR) region was measured using UV-Vis spectroscopy. Transmission...
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Here, we report selective adsorption of cationic dyes methylene blue (MB) and rhodamine B (RB) and anionic dyes methyl orange (MO) and bromo cresol green (BCG) by modifying the surface of cetyl trimethyl ammonium bromide (CTAB) coated porous silica nanoparticles (PSN). We used a top down approach to synthesize PSN (porous silica nanoparticles) with...
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This study reports colorimetric and spectroscopic probing of heavy metal Hg+ ² ion by using water soluble starch capped silver nanoparticle (AgNPs). AgNPs have been prepared through reduction method and characterized by Surface plasmon resonance (SPR) peak from UV-Vis spectroscopy. We have shown that when heavy metal ion like Hg+ ² interact with Ag...
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We report the synthesis of highly crystalline CTAB templated ZnO mesoporous structures by hydrothermal based methodresulting in the self-assembly of zinc ions at the interface of organic molecules and solutions. Structural investigations were carried out using powder X-ray diffraction (XRD) and selected area electron diffraction (SAED) to affirm th...
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The fabrication of one-dimensional (1D) rods or wires of titania in desired crystalline facets is quite exciting due to unique optoelectronic properties. The single crystalline, oriented nanorods directly grown on transparent conducting oxide (TCO) substrates are finding a lot of interest in solar photovoltaics and several other optoelectronic devi...
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The development of a novel green top-down approach called bio-milling for synthesizing the oxide nanomaterials is an issue of topical interest. While a number of chemical processes are energy intensive and involve toxic chemicals. Here we report, at room temperature, bio-milling of chemically synthesized barium titinate (BaTiO3) particles by challe...
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Single-phase orthorhombic DyMnO3 and GdMnO3 nanoparticles in the size range 60–70 and 35–45 nm, respectively, were synthesized using a modified hydrothermal method. The magnetic property measurements of DyMnO3 nanocrystals show anomalies around ~43 K (antiferromagnetic (AFM) coupling between Mn3+ spins) and at 7 K in the form of a peak in the zero-...
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We report the temperature and frequency dependent dielectric measurements and ac magnetic susceptibility of chemically synthesized DyFeO3 nanoparticles (size ∼50–60 nm). The measurement of the dielectric properties was carried out in a broad temperature (20–325 K) and frequency (1–106 Hz) range. The non-Debye type dipolar relaxation phenomenon was...
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Full-text available
We report the temperature and frequency dependent dielectric measurements and ac magnetic susceptibility of chemically synthesized DyFeO3 nanoparticles (size ∼50–60 nm). The measurement of the dielectric properties was carried out in a broad temperature (20–325 K) and frequency (1–106 Hz) range. The non-Debye type dipolar relaxation phenomenon was...
Article
Full-text available
We report the temperature and frequency dependent dielectric measurements and ac magnetic susceptibility of chemically synthesized DyFeO3 nanoparticles (size ∼50–60 nm). The measurement of the dielectric properties was carried out in a broad temperature (20–325 K) and frequency (1–106 Hz) range. The non-Debye type dipolar relaxation phenomenon was...
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Full-text available
Interest has grown to study TbMnO3 as it was recently reported to show a gigantic magnetoelectric effect. Here, we report the synthesis and detailed magnetic and Raman spectroscopy study on TbMnO3 particles of size ∼25 nm and 2–3 μm, respectively. The incommensurate–commensurate (lock-in) transition, usually observed at 27 K for bulk phase of TbMnO...
Article
A giant linear magnetoelectric effect was observed by Y. Tokura’s group recently in multiferroic DyFeO3, which demands a detailed investigation of its magnetic properties. Additionally, there is little information on the changes of chemical and physical properties of these materials with the reduction in particle size in spite of the potential appl...
Article
Rare earth manganites crystallize in distorted orthorhombic perovskite or hexagonal structures and exhibit quite interesting optical and magnetic properties dictated by the size of the rare earth ion. Many of these materials might exhibit both ferroelectric and magnetic ordering as well as magnetoelectric coupling. However, their physical propertie...
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We report the temperature-dependent Raman and dielectric spectroscopy of chemically synthesized BiFeO3 nanoparticles (average size 50−60 nm). The Raman spectra (90−700 K) show two sets of transitions in the lowest Raman E mode, associated with Bi−O bond motion situated in close proximity to the spin reorientation transitions reported for BiFeO3, th...
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Here we report for the first time, a detailed synthesis mechanism of GdCrO3 nanoparticles using a surfactant-less hydrothermal method. We also report a detailed study of their structural and optical properties. The selected area electron diffraction and powder X-ray diffraction studies of GdCrO3 nanoparticles show pure phase and excellent crystalli...
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The rare earth orthochromites are extremely interesting due to the richness of their optical, dielectric, and magnetic properties as well as due to their multiferroic properties which make them suitable materials to study in the nanoregime. However, the wet-chemical synthesis of these materials in nanosize is nontrivial. Here, we report for the fir...
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Here, we report the effect of reduction in particle size on the temperature dependent magnetization of chemically synthesized BiFeO3 nanocrystals with average grain size of 55 nm. The X-ray photoelectron spectroscopy results show a significant broadening of binding energy peaks associated to Fe3+ 2p3/2 core levels due to the reduced size. Additiona...

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