Journal
ENERGY CONVERSION AND MANAGEMENT
Volume 292, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.enconman.2023.117435
Keywords
Biodiesel; Photocatalyst; Heterojunction; Plasmonic nearfields; FDTD; DFT
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Renewable energy sources provide more reliable and resilient alternatives to traditional sources, and biodiesel, derived from renewable resources, has a significantly lower carbon footprint. The study focused on efficient biodiesel production using visible light-irradiated Si/MgO heterojunctions and showed that Si/MgO photocatalyst exhibited superior activity. The work provided valuable insights into efficient plasmonic photocatalysis, paving the way for future advancements in high-performance photocatalysts.
Renewable energy sources offer greater reliability and resilience compared to traditional sources. Biodiesel, derived from renewable resources that absorb carbon dioxide during growth and production, boasts a significantly lower carbon footprint than petroleum-based diesel fuel. Heterojunction photocatalysts have emerged as a promising solution for environmental challenges. This study focused on efficient biodiesel production using visible light-irradiated Si/MgO heterojunctions. The XPS analysis confirmed the crucial role of surface functionality in achieving high photocatalytic efficiency. Transesterification occurs through SiH and SiOH bond formation on the catalyst. Finite-difference time-domain (FDTD) predicts the structure-activity relationship, showing stronger plasmonic nearfields in Si/MgO due to distinct dielectric constants. The Si/MgO photocatalyst exhibited superior photocatalytic activity under visible light, consistent with FDTD results. Biodiesel production was attained to 96% yield using 2 wt% catalysts, a 12:1 M ratio of methanol to Jatropha curcas oil, and a 3.5 hrs reaction time. Therefore, the work provided valuable insights into the mechanism of efficient plasmonic photocatalysis, paving the way for future advancements in novel high-performance photocatalysts.
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