Journal Articles

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Author: search.filters.author.JagadeeshBabu, J.Subject: search.filters.subject.nanoparticle

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    Synthesis and characterization of silver decorated polysulfone/cellulose acetate hybrid ultrafiltration membranes using functionalized TiO2 nanoparticles
    (Desalination Publications dwt@deswater.com, 2017) Sri, K.S.; Nair, A.K.; JagadeeshBabu, J.
    Amine functionalized TiO2 nanoparticles were synthesized via surface reaction with 3-Aminopropyl triethoxysilane. These nanoparticles were added to polysulfone and cellulose acetate blend casting solutions in 1-Methyl-2-pyrrolidone to form hybrid membranes by phase inversion. The amine groups on the surface of the membranes were used as absorption sites for silver nanoparticles. The obtained membranes were characterized using Fourier Transform Infra Red spectroscopy, Scanning electron microscope and X-ray diffraction. Water uptake studies and contact angle measurements were done to evaluate hydrophilicity of the membranes. Pure water flux studies of the membrane were carried out in a dead end filtration unit. Rejection and antifouling studies were carried out using bovine serum albumin as a model protein. The hybrid membranes exhibited better permeability and fouling resistance. The hybrid membranes with silver decoration on the surface showed microbial resistance. © 2017 Desalination Publications. All rights reserved.
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    Photocatalytic degradation of p-nitrophenol using biologically synthesized ZnO nanoparticles
    (Springer Science and Business Media Deutschland GmbH, 2021) Kadam, V.V.; Shanmugam, S.D.; JagadeeshBabu, J.; Mohan Balakrishnan, R.M.
    The present work deals with the photocatalytic degradation of p-nitrophenol as it is a United States Environmental Protection Agency-listed priority pollutant and has adverse environmental and health effects. To eradicate the detrimental environmental impact of p-nitrophenol, the biologically synthesized ZnO nanoparticles were used as a photocatalyst. The degradation of p-nitrophenol was confirmed by decreasing the absorbance value at a characteristic wavelength of 317 nm using the UV-vis spectrophotometer. Reaction parameters such as ZnO photocatalyst concentration of 0.1 g/L at pH 11 in the presence of H2O2 (5 mM) were found to be optimum conditions for p-nitrophenol degradation. The photocatalytic degradation was slowly enhanced in the presence of H2O2 as an electron acceptor. The kinetics of nitrophenol degradation was studied, which follows the pseudo-first-order reaction. The photocatalytic degradation of p-nitrophenol was characterized by using total organic carbon, chemical oxygen demand, and high-performance liquid chromatography analyses. This method is found to be effective as it is environmentally friendly, free of toxic chemicals. © 2020, Springer-Verlag GmbH Germany, part of Springer Nature.
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    Zinc-decorated barium oxide nanorods for the effective sunlight-induced catalytic degradation of Irgalite violet dye
    (Springer Science and Business Media Deutschland GmbH, 2023) Ilango, I.; Susanna, D.; Gabriella, R.; Mohan Balakrishnan, R.M.; JagadeeshBabu, J.
    Simple and facile fabrication of barium oxide (BaO) and zinc-decorated barium oxide (ZnBaO) nanocatalysts was accomplished through a co-precipitation technique. Irgalite violet (IV) dye was subjected to sunlight-induced catalytic degradation using novel catalyst ZnBaO nanorods. The synthesized nanocatalysts were subjected to various analytical techniques, including FE-SEM/EDX, XRD and FTIR, for their comprehensive characterization. X-ray diffraction confirmed the crystallinity of BaO and ZnBaO nanocatalysts. The FE-SEM image of the ZnBaO nanocatalyst revealed the occurrence of distinct nanorods with a mean size of 22.5 nm possessing an aspect ratio of 4.95. A characteristic UV absorbance peak was observed at 310 nm for BaO and 380 nm for ZnBaO nanocatalysts. The substitution of Zn to BaO led to a favorable decrease in the band gap energy from 5.315 eV (BaO) to 2.6 eV (ZnBaO). The synthesized BaO and ZnBaO nanocatalysts were used in parametric studies by varying catalyst dosage, irradiation time, pH and initial dye concentration. The ZnBaO nanorods showed a maximum degradation efficiency of 99.9% at pH 11 with a catalyst dosage of 40 mg/50 mL containing 5 mg/L dye concentration. The recyclability studies showed that the ZnBaO nanorods could serve as a potential catalyst for degrading dyes. © 2023, The Author(s), under exclusive licence to Springer Nature Switzerland AG.