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12. Electrospun Fibrous Scaffolds for Cardiac Tissue Engineering

Author

Ashok, Nivethitha, Kaliannagounder, Vignesh Krishnamoorthi, Kim, Cheol Sang, Park, Chan Hee, Jayakumar, R., Abe, Akihiro, Editorial Board Member, Albertsson, Ann-Christine, Editorial Board Member, Coates, Geoffrey W., Editorial Board Member, Genzer, Jan, Editorial Board Member, Kobayashi, Shiro, Editorial Board Member, Lee, Kwang-Sup, Editorial Board Member, Leibler, Ludwik, Editorial Board Member, Long, Timothy E., Editorial Board Member, Möller, Martin, Editorial Board Member, Okay, Oguz, Editorial Board Member, Percec, Virgil, Editorial Board Member, Tang, Ben Zhong, Editorial Board Member, Terentjev, Eugene M., Editorial Board Member, Theato, Patrick, Editorial Board Member, Voit, Brigitte, Editorial Board Member, Wiesner, Ulrich, Editorial Board Member, Zhang, Xi, Editorial Board Member, and Jayakumar, R., editor

Published
2023
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34. Increasing electron density through an n-type semiconductor to accelerate hot electrons from plasmonic Au nanospheres for artificial photosynthesis and cross-coupling reactions.

Author

Kumar, Dinesh, Jaswal, Richa, Shrestha, Devendra, Kumar, Suresh, Park, Chan Hee, and Kim, Cheol Sang

Abstract

Here, we report the synthesis of an n-type wide band gap semiconductor (SnO2) and gold nanosphere (GNSs)-based core-satellite heterostructures (GNSs@SnO2) composed of GNSs as core and ultra-small SnO2 nanodots as a satellite with multiple thicknesses, which were then utilized for artificial photosynthesis and the Suzuki–Miyaura coupling reaction. SnO2 nanodot coating thickness on GNSs was maintained as 3–4 nm (GNSs@SnO2-US), 6–7 nm (GNSs@SnO2-SS), and 14–15 nm (GNSs@SnO2-TS) and the prepared nanostructures were used for visible light-induced artificial photosynthesis and the Suzuki–Miyaura coupling reactions. The higher electron density in GNSs@SnO2-SS led to more light absorption, which generated high-energy hot charge carriers, resulting in a highly active photocatalyst for CO2 conversion to HCOOH (quantum yield = 2.15%, chemical yield = 3.69%) with high selectivity (96%) and achieving a biphenyl yield of 99.15% in the cross-coupling of phenylboronic acid and iodobenzene. The apparent quantum efficiency for CO2 photoreduction at 550 nm monochromatic wavelength was observed as 0.799%. GNSs@SnO2-SS showed robust structure and excellent colloidal stability with excellent reusability for at least 10 reaction cycles without losing catalytic activity and a high shelf life of 1 year. The prepared GNSs@SnO2-SS nanoparticles also displayed high photocatalytic activity in NIR and sunlight-induced CO2 reduction and coupling reactions. The controlled coating of 6–7 nm SnO2 nanodots on GNSs was found to be the optimized satellite thickness, which enhanced the electron density due to the wide band gap of SnO2. The increased electron density led to greater light absorption to generate high-energy hot electrons and hot holes. This led to high photocatalytic efficiency of GNSs@SnO2-SS for CO2 reduction and cross-coupling reactions. [ABSTRACT FROM AUTHOR]

Published
2024
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