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4 article(s) from Saravanan, Pichiah

LED-light-activated photocatalytic performance of metal-free carbon-modified hexagonal boron nitride towards degradation of methylene blue and phenol

Nirmalendu S. Mishra and
Pichiah Saravanan

Beilstein J. Nanotechnol. 2022, 13, 1380–1392, doi:10.3762/bjnano.13.114

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Figure 1: (a) HR-XRD plots for HBN and MBN-80, (b–d) SEM images for HBN, MBN-25, MBN-50, and (e, f) MBN-80. H...

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Figure 2: XPS binding energy spectrum for constituent elements from MBN. (a) Survey scan, (b) B 1s, (c) N 1s,...

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Figure 3: BET adsorption–desorption isotherm and BJH pore distribution for (a) HBN and (b) MBN-80.

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Figure 4: (a) EPR plot for the studied materials, (b) zeta potential study.

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Figure 5: (a–e) UV-DRS and Tauc plot, (f) RI plot, and (g) LHE plot for the studied materials.

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Figure 6: (a) Nyquist plot for HBN and MBN-80, (b, c) MS-plot, (d) W_sc analysis for HBN and MBN-80, (e, f) OC...

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Figure 7: (a) Adsorption of MB and phenol at varied pH values. (b) The effect of pH variation on photocatalyt...

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Figure 8: (a) Electronic band structure demonstrating the edge potentials for MBN. (b) Charge trapping analys...

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Full Research Paper

Published 22 Nov 2022

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Mechanistic insights into plasmonic photocatalysts in utilizing visible light

Kah Hon Leong,
Azrina Abd Aziz,
Lan Ching Sim,
Pichiah Saravanan,
Min Jang and
Detlef Bahnemann

Beilstein J. Nanotechnol. 2018, 9, 628–648, doi:10.3762/bjnano.9.59

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Figure 1: Distinctive features of plasmonics contributing to improved photocatalyst performance.

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Figure 2: (a) Representation of localized surface plasmon resonance (LSPR) evolution in a noble metal particl...

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Figure 3: The metallic equivalent resonant wavelength for 10 nm diameter nanoparticles. Reprinted with permis...

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Figure 4: Pictorial representation of the localized surface plasmon resonance principle. Reprinted with permi...

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Figure 6: Synthesis of Pd/TiO₂ photocatalyst via sunlight-assisted photodeposition [50].

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Figure 7: Schematic of Au/AgBr-Ag heterostructure mechanism for improved photocatalytic performance. (a) Semi...

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Figure 8: Photodegradation of GO in the presence of an electron donor (Ag NPs). Reprinted with permission fro...

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Figure 9: (a) Pure metal nanoparticles (NPs) without any semiconductor. (b) Metal NPs partially embedded into...

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Figure 10: High-resolution X-ray absorption spectroscopy (HR-XAS) experiment used to determine the changes in ...

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Figure 11: Generation of reactive oxygen species (ROSs) in the photocatalytic reduction and oxidation of O₂ an...

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Figure 12: Plausible structural formation of adsorbed H₂O₂ on TiO₂ surface (a) end-on (b) bridged and (c) side...

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Figure 13: Reactions involved in the detection method of H₂O₂ with fluorescence probes (a) p-hydroxyphenylacet...

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Figure 15: (a) Laser-induced fluorescence detection of •OH released from an irradiated TiO₂ surface. Reprinted...

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Figure 16: Reaction routes for detection of •OH radicals with a DMPO spin-trapping reagent. Reactions with •OH...

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Figure 17: (a) Usage of fluorescence probe HPF to detect •OH radicals. (b) Experimental setup for the single-m...

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Figure 18: (a) Reactions involved in the detection of •O₂⁻ with DMPO. (b) Chemical structures of the spin-trap...

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Figure 19: (a) FDTD simulation set up for Cu₇S₄. (b–d) 2D contour map of the electric field intensities around...

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Review

Published 19 Feb 2018

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Sugarcane juice derived carbon dot–graphitic carbon nitride composites for bisphenol A degradation under sunlight irradiation

Lan Ching Sim,
Jing Lin Wong,
Chen Hong Hak,
Jun Yan Tai,
Kah Hon Leong and
Pichiah Saravanan

Beilstein J. Nanotechnol. 2018, 9, 353–363, doi:10.3762/bjnano.9.35

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Figure 1: Field emission scanning electron microscopy (FESEM) images of (a) g-C₃N₄, (b) CD/g-C₃N₄(0.1), (c) C...

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Figure 2: (a) XRD patterns and (b) FTIR spectra of g-C₃N₄, CD/g-C₃N₄(0.1), CD/g-C₃N₄(0.2), and CD/g-C₃N₄(0.5)....

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Figure 3: (a) The absorption spectrum of carbon dots (CDs) solution. The inset shows the fluorescence of the ...

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Figure 4: X-rat photoelectron spectroscopy (XPS) of (a) C 1s (b) N 1s, (c) O 1s for CD/g-C₃N₄(0.5), and (d) C...

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Figure 5: (a) Photocatalytic degradation of bisphenol A (BPA) as a function time under irradiation of natural...

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Figure 6: Electron transfer mechanism of CD/g-C₃N₄.

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Full Research Paper

Published 30 Jan 2018

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Palladium nanoparticles anchored to anatase TiO₂ for enhanced surface plasmon resonance-stimulated, visible-light-driven photocatalytic activity

Kah Hon Leong,
Hong Ye Chu,
Shaliza Ibrahim and
Pichiah Saravanan

Beilstein J. Nanotechnol. 2015, 6, 428–437, doi:10.3762/bjnano.6.43

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Figure 1: Schematic diagram for the synthesis of Pd/TiO₂ trough solar-assisted photodeposition.

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Figure 2: FESEM images of a) low magnification, b,c) high magnification of 0.5 wt % Pd/TiO₂. The inset of c) ...

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Figure 3: X-ray diffraction patterns of a) TiO₂, b) 0.5 wt % Pd/TiO₂, c) 1.0 wt % Pd/TiO₂ and d) 3.0 wt % Pd/...

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Figure 4: Raman spectra of a) TiO₂, b) 0.5 wt % Pd/TiO₂, c) 1.0 wt % Pd/TiO₂ and d) 3.0 wt % Pd/TiO₂.

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Figure 5: Adsorption–desorption isotherm of 0.5 wt % Pd/TiO₂ and the inset is the pore size distribution.

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Figure 6: Core level XPS spectra of a) Ti 2p and b) Pd 3d of 0.5 wt % Pd/TiO₂.

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Figure 7: UV–vis absorption spectra of a) TiO₂, b) 3.0 wt % Pd/TiO₂, c) 0.5 wt % Pd/TiO₂ and d) 1.0 wt % Pd/T...

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Figure 8: Photoluminescence spectra of a) TiO₂, b) 0.5 wt % Pd/TiO₂, c) 3.0 wt % Pd/TiO₂ and d) 1.0 wt % Pd/T...

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Figure 9: Photocatalytic degradation rates of AMX under visible light irradiation.

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Figure 10: Schematic diagram of electron transfer and degradation mechanism of AMX.

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Figure 11: Recycled photocatalytic degradation rates of AMX (0.5 wt % Pd/TiO₂).

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Figure 12: The kinetics of AMX degradation by prepared TiO₂ and various Pd loading photocatalysts.

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Full Research Paper

Published 11 Feb 2015

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LED-light-activated photocatalytic performance of metal-free carbon-modified hexagonal boron nitride towards degradation of methylene blue and phenol

Mechanistic insights into plasmonic photocatalysts in utilizing visible light

Sugarcane juice derived carbon dot–graphitic carbon nitride composites for bisphenol A degradation under sunlight irradiation

Palladium nanoparticles anchored to anatase TiO2 for enhanced surface plasmon resonance-stimulated, visible-light-driven photocatalytic activity

Palladium nanoparticles anchored to anatase TiO₂ for enhanced surface plasmon resonance-stimulated, visible-light-driven photocatalytic activity