Browsing by Author "Sharma, Anshu"

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    Carbon dioxide and hydrogen adsorption study on surface‑modified HKUST‑1 with diamine/triamine
    (Scientific Reports, 2022) Zelenka, Tomas; simanova, Klaudia; Saini, Robin; Zelenkova, Gabriela; Nehra, Satya,Pal; Sharma, Anshu; Almasi, Miroslav
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    Synergistic photocatalysis of VO2-A/g-C3N4 composites for efficient degradation of anionic and cationic dyes: Towards a sustainable environmental solution
    (2025) Sharma, Anshu
    Due to the outflow of dye effluent from numerous industrial operations, dye pollution is a severe environmental issue. Because of its efficiency and environmental friendliness, photocatalytic degradation is a technology promising for treating dye pollutants. This study used a simple hydrothermal process to synthesise VO2-A/g-C3N4 nanocomposite and its photocatalytic activity for the breakdown of anionic dyes (Xylenol Orange (XO, Rose Bengal (RB)) and cationic dyes (Crystal Violet (CV), Auramine O (AO)) and Mix dyes (1:1 mixture of anionic and cationic dyes) were assessed. XRD, XPS, SEM, FTIR, Photoluminescence, TEM, UV-DRS and BET analysis were used to characterize the nanocomposite.SEM and TEM analyses revealed a distinct morphology of the VAG-4 nanocomposite, with small, irregular VO2-A nanoparticles dispersed and wrapped around the g-C3N4 surface. UV-DRS analysis, using the Tauc relation, indicated that VO2-A incorporation shifted the absorption edge to longer wavelengths, with VAG-4 showing a peak at 487 nm (1.91 eV). BET analysis of VAG-4 shows a specific surface area of 47.1 m2/g, a pore volume of 0.2125 cm3/g, and an average pore size of 27.9 nm, supporting its potential for effective photocatalytic applications. We assessed the photocatalytic activity ofVO2-A/g-C3N4 nanocomposite for the degradation of the anionic dyes (RB, XO), cationic dyes (AO, CV) and Mix dyes. The results demonstrated that the VAG-4 nanocomposite with degradation percentages of RB (83.5 %), XO (75.5 %), AO (73.4 %), and CV (78.2 %) exhibited more enhanced photocatalytic activity than the individual precursors. The nanocomposite’s outstanding photocatalytic activity suggests that it has the potential for practical appli cations in environmental cleanup.
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    Unveiling the exceptional photocatalytic activity of SmO/g-C3N4 nanocomposites for dye industries wastewater treatment
    (2025) Sharma, Anshu
    On a global scale, wastewater dye pollution has become a major environmental issue. Photocatalysis is a well- known and promising technology for removing organic pollutants, such as dyes, from wastewater. In this work, SmO/g-C3N4 nanocomposites were fabricated and used as a photocatalyst for the degradation of anionic dyes, cationic dyes, and mix dyes due to their high specific surface area and outstanding photocatalytic capa bilities. Characterization of the synthesized nanocomposites included Fourier-transform infrared (FTIR), Scan ning electron microscopy (SEM), Ultraviolet-visible diffuse reflectance spectroscopy (UV-DRS), X-ray Diffraction (XRD), Transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). The photocatalytic activity of SmO/g-C3N4 nanocomposites was studied against anionic dyes (Rose bengal (RB) and Xylenol Orange (XO)), cationic dyes (Auramine O (AO) and Crystal Violet (CV)) and their mixture (Mix Dyes). The results indicated that SmO/g-C3N4 nanocomposite (SmG-1.5) exhibited superior photocatalytic activity compared to its precursors, degrading dyes at rates of Rose bengal-84.7 %, Xylenol Orange-75.3 %, Auramine O-82.2 %, Crystal Violet-72.3 %, and Mix dyes-80 %. Thus, SmO/g-C3N4 nanocomposites demonstrate significant potential as an efficient photocatalyst for degrading dyes in wastewater.