Two-Dimensional Graphene Quantum Dots in Drug Delivery Applications

Khan, Mohd Jahir; Wibowo, Agung; Sakdaronnarong, Chularat

doi:10.1007/978-981-99-8010-9_10

Engineering Materials

2024

DOI: 10.1007/978-981-99-8010-9_10

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Two-Dimensional Graphene Quantum Dots in Drug Delivery Applications

Mohd Jahir Khan,

Agung Wibowo,

Chularat Sakdaronnarong

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Hedgehog Zinc Oxide–Graphene Quantum Dot Heterostructures as Photocatalysts for Visible-Light-Driven Water Splitting

Le,

Mapari,

Kim

2024

ACS Omega

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The development of efficient photocatalysts for sustainable hydrogen production via water splitting is vital for advancing renewable energy technologies. In this study, we present the synthesis and characterization of a novel visible-light-active photocatalyst comprising hedgehog-shaped zinc oxide (ZnO) nanostructures coupled with graphene quantum dots (GQDs). Optical properties assessed by UV−visible and photoluminescence (PL) spectroscopy revealed that the ZnO/GQDs heterostructure possessed a reduced band gap (2.86 eV) compared with pristine ZnO (3.10 eV), resulting in improved light absorption and charge separation. Electrochemical analyses indicated a significantly higher photocurrent response and lower charge transfer resistance for the ZnO/GQDs heterostructure compared with the pristine ZnO nanostructure. Photocatalytic tests demonstrated that the ZnO/ GQDs heterostructure achieved over 3-fold higher hydrogen (H 2 ) production rates, with an apparent quantum yield (AQY) of 1.51% at 440 nm, and maintained stable activity over prolonged reaction periods. These results highlight the enhanced photocatalytic efficiency and stability of the ZnO/GQDs heterostructure, underscoring its potential as a high-performance photocatalyst for sustainable hydrogen generation. The synergistic effects between ZnO nanostructures and GQDs offer valuable insights into the design of advanced photocatalytic materials for renewable energy applications.

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Hedgehog Zinc Oxide–Graphene Quantum Dot Heterostructures as Photocatalysts for Visible-Light-Driven Water Splitting

Le,

Mapari,

Kim

2024

ACS Omega

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Two-Dimensional Graphene Quantum Dots in Drug Delivery Applications

Cited by 1 publication

References 84 publications

Hedgehog Zinc Oxide–Graphene Quantum Dot Heterostructures as Photocatalysts for Visible-Light-Driven Water Splitting

Hedgehog Zinc Oxide–Graphene Quantum Dot Heterostructures as Photocatalysts for Visible-Light-Driven Water Splitting

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