Biosynthesis of TiO2 Nanoparticles and Their Application as Catalyst in Biodiesel Production

Chandren, Sheela; Rusli, Rosliana

doi:10.1007/978-981-16-9356-4_6

Cited by 2 publications

(1 citation statement)

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“…Biosynthesized nanoparticles are eco-friendly and safe, and have been incorporated into various successful and efficient applications as reported in many studies. The biosynthesis of TiO 2 NPs using microorganisms is an alternative green route to overcome these disadvantages while maintaining their excellent properties [ 6 ]. During the biological synthesis of NPs, microbial metabolites including enzymes, terpenoids, and phenolics act as stabilizers and capping agents [ 7 ].…”

Section: Introductionmentioning

confidence: 99%

Biosynthesis, characterization and optimization of TiO2 nanoparticles by novel marine halophilic Halomonas sp. RAM2: application of natural dye-sensitized solar cells

et al. 2023

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Background Metal oxide nanoparticles (NPs) are becoming valuable due to their novel applications. The green synthesis of TiO2 NPs is more popular as a flexible and eco-friendly method compared to traditional chemical synthesis methods. TiO2 NPs are the most commonly used semiconductor in dye-sensitized solar cells (DSSCs). Results The biogenic TiO2 NPs were produced extracellularly by the marine halophilic bacterium Halomonas sp. RAM2. Response surface methodology (RSM) was used to optimize the biosynthesis process, resulting in a starting TiO2 concentration of 0.031 M and a pH of 5 for 92 min (⁓15 nm). TiO2 NPs were well-characterized after the calcination process at different temperatures of 500, 600, 700 and 800 °C. Anatase TiO2 NPs (calcined at 500 °C) with a smaller surface area and a wider bandgap were nominated for use in natural dye-sensitized solar cells (NDSSCs). The natural dye used as a photosensitizer is a mixture of three carotenoids extracted from the marine bacterium Kocuria sp. RAM1. NDSSCs were evaluated under standard illumination. After optimization of the counter electrode, NDSSCBio(10) (10 layers) demonstrated the highest photoelectric conversion efficiency (η) of 0.44%, which was almost as good as NDSSCP25 (0.55%). Conclusion The obtained results confirmed the successful green synthesis of TiO2 NPs and suggested a novel use in combination with bacterial carotenoids in DSSC fabrication, which represents an initial step for further efficiency enhancement studies.

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Section: Introductionmentioning

confidence: 99%