Green Synthesis of Nano-Sized Multiflower-like Fe₃O₄@SiO₂/_L-Tryptophan from Natural Resources and Agricultural Waste: A Photo-Switchable Oxidation Catalyst

Langmuir, Journal Year: 2025, Volume and Issue: unknown

Published: April 16, 2025

This study presents a novel, eco-friendly, and cost-effective magnetic hybrid photocatalyst, Fe3O4@SiO2/L-tryptophan, synthesized through scalable three-step green approach using natural agricultural waste. The Fe3O4@SiO2/L-tryptophan nanoparticle features core-shell structure with high surface area (63.14 m2/g), strong visible-light absorption (λ > 448 nm), narrow band gap (1.84 eV), superparamagnetic properties (22 emu/g), enabling efficient separation reusability. Characterization techniques (XRD, XPS, FT-IR, FE-SEM, HR-TEM, UV-vis DRS, TGA, BET, EIS) confirmed its structural stability, charge separation, interfacial transport. photocatalyst achieved 82.1% oxidative desulfurization of dibenzothiophene (DBT) conversion rates for toluene (85%) styrene (90%) under visible light O2 as an oxidant. It retained over 85% activity after five cycles, demonstrating excellent durability. For the first time, all components are derived from sources: Fe3O4 sorghum seed extract, SiO2 rice husk, L-tryptophan enhanced separation. sustainable synthesis reduces chemical waste energy consumption, setting new benchmark environmentally friendly photocatalysts.

Language: Английский

Ultrasound-assisted aerobic desulfurization of fuel oil using plasma-treated MoO3-boron nitride catalysts

Journal of environmental chemical engineering, Journal Year: 2024, Volume and Issue: unknown, P. 115248 - 115248

Published: Dec. 1, 2024

Language: Английский

High-Entropy metal oxide with enhanced catalytic performance and magnetic recovery for Ultra-Deep desulfurization of fuel oils

Separation and Purification Technology, Journal Year: 2024, Volume and Issue: 361, P. 131269 - 131269

Published: Dec. 25, 2024

Language: Английский