Faculty Publications
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Item Enhanced photoresponse and efficient charge transfer in porous graphene-BaTiO3 nanocomposite for high performance photocatalysis(Elsevier Ltd, 2023) Bhat, D.K.; Bantawal, H.; Uma, U.; Shenoy, U.S.Porous graphene-BaTiO3 (PGBT) nanocomposite was synthesized by a simple one pot solvothermal method and its photocatalytic activity was evaluated by studying its efficiency in degrading methylene blue (MB) dye under visible light. The combination of experimental and theoretical analysis revealed enhanced photocatalytic activity of the PGBT composite, which could be attributed to (i) the interaction of BaTiO3 nanoparticles with PG sheets via Ba–C bond, (ii) reduced band gap due to the introduction of hybridized states leading to increased absorption in visible range and (iii) large surface area which provides more active sites for the efficient adsorption of MB dye. The formation of Ba–C bond proved to be highly advantageous for the efficient transport of photogenerated charge carriers, thereby suppressing the recombination of charge carriers. The synthesized nanocomposite showed three times higher photodegradation efficiency compared to BaTiO3. In addition to this, the composite also showed an excellent cyclic stability indicating its suitability as an effective photocatalyst for the environmental remediation. © 2023 Elsevier B.V.Item In-situ synthesis of cuprous oxide nanofluid using ribose for enhanced thermal conductivity and stability(Elsevier B.V., 2024) Bhat, D.K.; Kumar, S.P.; Shenoy, U.S.Enhancing the thermal properties of conventional heat transfer fluids represents a significant technological challenge. In this context, nanofluids have emerged as a promising solution, emphasizing the need for simpler and more convenient synthesis methods. This study introduces a novel, eco-friendly, one-step synthesis method, overcoming the complexities of traditional two-step processes. The resulting nanofluid generated by using ribose as a reducing agent, consists of cuprous oxide particles at the nano scale, and the fluid itself exhibits Newtonian behavior. With an impressive thermal conductivity of 3.052 W m−1 K−1, the nanofluid exhibits stability for a noteworthy 4-month duration, achieved through the strategic addition of sodium lauryl sulfate. This breakthrough positions the nanofluid as a compelling option for diverse applications in thermal energy storage and management. © 2024 Elsevier Inc.