Interface-engineered CsPbBr<sub>3</sub>–TiO<sub>2</sub> nanocomposites for efficient and selective photocatalytic conversion of HMF to DFF
We report a stable and selective photocatalyst for solar-driven oxidation of 5-hydroxymethylfurfural (HMF) using <i>in situ</i> TiO<sub>2</sub> coated CsPbBr<sub>3</sub> quantum dots (QDs). Controlled TiO<sub>2</sub> 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.
Authors
- Yuji Akaishi (ORCID: https://orcid.org/0000-0002-4043-0537)
- Tetsuya Kida (ORCID: https://orcid.org/0000-0001-9357-9557)
- Muhammad Sohail Ahmad
- Makoto Takafuji (ORCID: https://orcid.org/0000-0001-9985-2569)
- Paravee Vas‐Umnuay (ORCID: https://orcid.org/0000-0002-9696-1206)
- Paundra Rizky Pratama (ORCID: https://orcid.org/0000-0003-2308-836X)
- Kona Sumi
- Varisara Phuaran
Institutions
- Chulalongkorn University (TH)
- Kumamoto Industrial Research Institute (JP)
- Kumamoto University (JP)
Publication Details
- Journal
- Nanoscale
- Published
- 2025-01-01
- DOI
- https://doi.org/10.1039/d5nr02675j
- Primary Topic
- Perovskite Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Kumamoto University
- Japan Society for the Promotion of Science