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Updated: Sep 9, 2025
Developing Photosensitizer-Cobaloxime Hybrids for Solar-Driven H2 Production in Aqueous Aerobic Conditions
Published on: October 5, 2019
Interface-engineered CsPbBr3-TiO2 nanocomposites for efficient and selective photocatalytic conversion of HMF to DFF
Varisara Phuaran1,2, Muhammad Sohail Ahmad3, Kona Sumi2
1Center of Excellence in Particle and Material Processing Technology, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand. Paravee.V@chula.ac.th.
None:
We report a stable and selective photocatalyst for solar-driven oxidation of 5-hydroxymethylfurfural (HMF) using in situ TiO2 coated CsPbBr3 quantum dots (QDs). Controlled TiO2 encapsulation at 120 °C preserves the structural integrity of the QDs, enhances colloidal stability, and forms a type II heterojunction that facilitates charge separation. The optimized nanocomposite achieves high conversion to 2,5-diformylfuran (DFF) with 90% selectivity under visible light irradiation using TEMPO as a redox mediator. Optical and post-reaction analyses confirm improved stability and suppressed Pb leaching. This work demonstrates that nanoscale interface engineering, combined with mild oxidative pathways, can enable the efficient and selective valorization of biomass-derived substrates.
