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Faculty of Applied Sciences

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Has files: YesSubject: search.filters.subject.03 Chemical Sciences

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    Palladium immobilized on guanidine functionalized magnetic nanoparticles : a highly effective and recoverable catalyst for ultrasound aided Suzuki-Miyaura cross-coupling reactions
    (Royal Society of Chemistry (RSC), 2023-10-16) Hegde, Sumanth; Nizam, Aatika; Vijayan, Ajesh; Dateer, Ramesh B.; Krishna, Suresh Babu Naidu
    We designed and prepared a palladium catalyst that can be magnetically recyclable by anchoring guanidine moiety on the surface of Fe3O4 nanoparticles, named Fe3O4@SiO2-TCT-Gua-Pd. It was established to be a potent catalyst for the Suzuki–Miyaura cross-coupling reaction (SMCR) in the EtOH/ H2O system under ultrasonic conditions. FT-IR spectroscopy, field-emission scanning electron microscopy (FESEM), energy dispersive X-ray (EDX) microanalysis, vibration sample magnetometry (VSM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA), and inductively coupled plasma atomic emission spectrometry (ICP-AES) analyses were used to characterize the structure of the Fe3O4@SiO2-TCT-Gua-Pd nanoctalyst. The Fe3O4@SiO2-TCT Gua-Pd catalyst produced favorable coupled products with excellent yields and was harmonious with various aryl halides and aryl boronic acids. The stability, low palladium leaching, and heterogeneous nature of the nanocatalyst were confirmed by a hot-filtration test. The palladium nanocatalyst could be easily recovered by magnetic field separation and recycled at least 6 times in a row without noticeable loss in its catalytic activity.
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    Development of activated carbon by bio waste material for application in supercapacitor electrodes
    (Elsevier BV, 2023-03) Devi, Raman; Kumar, Vinay; Kumar, Sunil; Kumar Sisodiya, Avnish; Kumar Mishra, Ajay; Jatrana, Anushree; Kumar, Ashwani; Singh, Paul
    Green nanotechnology is now emerging to address society's global sustainability issues by recycling numerous industrial and bio-wastes to produce functional carbonaceous nanomaterials like biochar, 2D graphene, graphene oxide, carbon nanotube (CNT), activated carbon (AC), etc. In this study, we have synthesized AC via the hydrothermal decomposition approach of the walnut shell under high temperature and pressure in a hydrothermal autoclave at temperature ranges from 200 to 250 ℃. The synthesized AC has a high specific surface area of 408.8 m2/g. It has an excellent specific capacitance of 204F/g at 1 A/g of current density with good cyclability up to 10,000 cycles.
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    Evaluation of antimicrobial potential of cerium-based perovskite (CeCuO3) synthesized by hydrothermal method
    (Royal Society of Chemistry (RSC), 2022) Soren, Siba; Chakroborty, Subhendu; Mahalik, Rakesh R.; Parhi, Purnendu; Pal, Kaushik; Behera, Debendra; Sahoo, Chita Ranjan; Padhy, Rabindra Nath N.; Aulakh, Manpreet Kaur; Sareen, Shweta; Krishna, Suresh Babu Naidu
    The hydrothermal synthesized CeCuO3 perovskite nanomaterial has been disinfected against microorganisms causing urinary tract infection (UTI). The synthesized CeCuO3 nanoparticle has been characterized by using the X-ray diffraction (XRD) technique,...