Ultrasound-assisted decoration of CuOx nanoclusters on TiO2 nanoparticles for additives free photocatalytic hydrogen production and biomass valorization by selective oxidation

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dc.contributor.authorGiannakoudakis, D.A.
dc.contributor.authorQayyum, A.
dc.contributor.authorNair, V.
dc.contributor.authorKhan, A.
dc.contributor.authorPradhan, S.R.
dc.contributor.authorPrekodravac, J.
dc.contributor.authorRekos, K.
dc.contributor.authorLaGrow, A.P.
dc.contributor.authorBondarchuk, O.
dc.contributor.author?omot, D.
dc.contributor.authorTriantafyllidis, K.S.
dc.contributor.authorColmenares, J.C.
dc.date.accessioned2026-02-05T09:26:52Z
dc.date.issued2021
dc.description.abstractThe herein presented ultrasound-assisted ultra-wet (US-UWet) impregnation synthetic approach was followed in order to avoid the drawbacks of the conventional wet impregnation synthesis. The goal was to homogeneously decorate the surface of the TiO<inf>2</inf> nanoparticles with nanometric sized (< 4 nm) clusters of mixed cupric and cuprous oxides. The physicochemical features of the nanocomposite (TiO<inf>2[sbnd]</inf>CuO<inf>x</inf>) were determined by high-angle annular dark-field scanning transmission electron microscope (HAADF-STEM), high-resolution transmission electron microscopy (HR-TEM), energy dispersive X-ray (EDX), X-ray photoelectron spectroscopy (XPS), powder X-ray diffraction (XRD), and Diffuse reflectance (DR) spectroscopy. TiO<inf>2[sbnd]</inf>CuO<inf>x</inf> showed an enhanced and continuous capability to generate molecular hydrogen upon low power ultraviolet irradiation. The benchmark commercial TiO<inf>2</inf> P25 did not reveal any H<inf>2</inf> formation under these conditions. TiO<inf>2[sbnd]</inf>CuO<inf>x</inf> presented also a high efficiency for the additives-free selective partial oxidation of two well established biomass derived model platform chemicals/building blocks, 5-hydroxymethylfurfural (HMF) and benzyl alcohol (BnOH) to the value-added chemicals 2,5-diformylfuran (DFF) and benzyl aldehyde (PhCHO), respectively. The nanocomposite showed higher DFF and PhCHO yield compared to P25. © 2021
dc.identifier.citationMolecular Catalysis, 2021, 514, , pp. -
dc.identifier.issn24688231
dc.identifier.urihttps://doi.org/10.1016/j.mcat.2021.111664
dc.identifier.urihttps://idr.nitk.ac.in/handle/123456789/23108
dc.publisherElsevier B.V.
dc.subjectAdditives
dc.subjectBiomass
dc.subjectCopper oxides
dc.subjectHigh resolution transmission electron microscopy
dc.subjectHydrogen production
dc.subjectImpregnation
dc.subjectIrradiation
dc.subjectNanocomposites
dc.subjectOxidation
dc.subjectScanning electron microscopy
dc.subjectSynthesis (chemical)
dc.subjectTiO2 nanoparticles
dc.subjectUltrasonics
dc.subjectX ray photoelectron spectroscopy
dc.subject5-hydroxymethylfurfural selective photo-oxidation
dc.subjectBenzyl alcohol
dc.subjectBiomass photocatalytic valorization
dc.subjectBiomass valorizations
dc.subjectHydrogen generations
dc.subjectNano-engineered titania dioxide
dc.subjectPhotocatalytic hydrogen production
dc.subjectTiO$-2$
dc.subjectUltrasound assisted synthesis
dc.subjectWet impregnation
dc.subjectTitanium dioxide
dc.titleUltrasound-assisted decoration of CuOx nanoclusters on TiO2 nanoparticles for additives free photocatalytic hydrogen production and biomass valorization by selective oxidation

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