Modulation of defect-mediated energy transfer from ZnO nanoparticles for the photocatalytic degradation of bilirubin

Bora, Tanujjal; Lakshman, Karthik; Sarkar, Soumik; Makhal, Abhinandan; Sardar, Samim; Pal, Samir Kumar; Dutta, Joydeep

doi:10.3762/bjnano.4.81

Cited by 54 publications

(34 citation statements)

References 32 publications

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“…In the absence of UV light, we observe almost minimal degradation which depicts the different behavior of Fe 2+ /Fe 3+ system compared to Mn 3+ /Mn 4+ 28 However, in the present study, the degradation efficiency is lower compared to other reports. Therefore, in order to enhance the degradation rate, we have incorporated Mn ions on the NPs surface.…”

Section: Controlled Photodegradation Of Bilirubincontrasting

confidence: 83%

Surface Engineering for Controlled Nanocatalysis: Key Dynamical Events from Ultrafast Electronic Spectroscopy

et al. 2014

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Surface engineering of various nanoparticles (NPs) is of growing interest and an important step to induce/control optical and/or catalytic activities. Although a wide variety of biomedical applications of magnetic Fe 3 O 4 NPs in diagnostics as well as therapeutics are well documented, the optical properties of the NPs still remain less well studied. Here we report a top-down fabrication methodology to modify a model ferrofluid with parent NPs sizes ∼23 nm, using tartrate as a functionalizing ligand as well as solubilizing agent. The surface engineering involves "ligand exchange" and simultaneous "phase transfer" of Fe 3 O 4 NPs (size ∼23 nm) from chloroform to water along with subsequent "core etching", resulting in a reduction of particle diameter to ∼5 nm. We demonstrate that tartrate-functionalized Fe 3 O 4 NPs (T-Fe 3 O 4 ) exhibit ligand to metal charge transfer transition in the UV spectral region, excellent blue luminescence, and efficient reusable photocatalytic activities which are completely absent in the parent NPs. We have used the functionalized NPs for the photodegradation of biomedically important jaundice marker bilirubin in aqueous solution. The surface adsorption of Mn ions on the surface of the TFe 3 O 4 NPs enables to control the degradation under UV light illumination. While the Mn-adsorbed T-Fe 3 O 4 NPs can efficiently degrade bilirubin in dark condition, the activity is significantly reduced under UV light. Finally, the detailed photocatalytic mechanism associated with ultrafast charge and energy transfer process has been discussed. We believe that bilirubin degradation rate can be controlled under UV light by varying Mn ion concentration on the NP's surface which can be a significant advancement for bilirubin degradation study. Overall, the results represent a promising route for the fabrication of Fe 3 O 4 NPs adaptable to diverse applications.

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Section: Controlled Photodegradation Of Bilirubincontrasting

confidence: 83%

Surface Engineering for Controlled Nanocatalysis: Key Dynamical Events from Ultrafast Electronic Spectroscopy

et al. 2014

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“…Herein, we propose Forster Resonance Energy Transfer (FRET) from the donor ZnO NRs to the acceptor ZnPc. The assessment of molecular distances in numerous assemblies from FRET calculations has become a very useful tool [20,[38][39][40]. The fluorescence decay profile of the donor ZnO NRs in the presence and absence of the acceptor ZnPc were obtained upon excitation with 375 nm laser and monitored at 550 nm (P 1 ) and 610 nm (P 2 ) ( Fig.…”

Section: Resultsmentioning

confidence: 99%

Ultrafast dynamics at the zinc phthalocyanine/zinc oxide nanohybrid interface for efficient solar light harvesting in the near red region

Seddigi

Ahmed

Sardar

et al. 2015

Solar Energy Materials and Solar Cells

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“…There are many techniques to modify the surface of ZnO NP, such as ligand etching, multi‐functional hybrid coating, defect state modulation etc. to achieve enhanced activity ,,,. Most of the processes are not easy or one‐step process.…”

Section: Introductionmentioning

confidence: 99%

Halide‐Modulated Functionality of Wide Band Gap Zinc Oxide Semiconductor Nanoparticle

et al. 2018

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Surface modification of inorganic nanomaterials using different ions is well-known to induce significant modulation in functionality of the nanoparticles (NP), which improves tuning their relevant properties for suitable applications in the field of nanotechnology. Here, we report synthesis and surface modification of a model inorganic wide bandgap semiconductor ZnO NP by halide ions by simple precipitation method and demonstrate that proximity of various halide ions to the NP modifies their electronic properties. It is interesting to note that such surface modulation has little impact on its morphology, while significantly influencing their applications in photocatalytic activity or magnetism. Indeed, the halide attached ZnO NP displays a large reduction of defect state emission. Various microscopic and spectroscopic tools (including picosecond resolved technique) were used to characterize and understand the key role of the halide ions to modulate the light induced charge separation in ZnO NP. Picosecond resolved fluorescence spectra unveil a significant quenching, implying an electronic cross-talking between the NP and the attached halide ions. Magnetic measurements indicate that attachment of a suitable halide ion introduces room temperature ferromagnetism in this system. Finally, the photocatalytic activity of the ZnO NP for the photodegradation of a model pollutant, methyl orange was evaluated under UV light irradiation. Halide ZnO is anticipated to be a very promising photocatalytic agent; hence it can be used to cleanup environmental pollution. First principles analysis has been performed to understand the modulation of electronic properties like photocatalysis and magnetism in halide attached nanosystem. The experimental behavior resembles nicely with theoretical results.[a] T.

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Modulation of defect-mediated energy transfer from ZnO nanoparticles for the photocatalytic degradation of bilirubin

Cited by 54 publications

References 32 publications

Surface Engineering for Controlled Nanocatalysis: Key Dynamical Events from Ultrafast Electronic Spectroscopy

Surface Engineering for Controlled Nanocatalysis: Key Dynamical Events from Ultrafast Electronic Spectroscopy

Ultrafast dynamics at the zinc phthalocyanine/zinc oxide nanohybrid interface for efficient solar light harvesting in the near red region

Halide‐Modulated Functionality of Wide Band Gap Zinc Oxide Semiconductor Nanoparticle

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