Observations of phonon anharmonicity and microstructure changes by the laser power dependent Raman spectra in Co doped SnO2 nanoparticles

Gaur, Lalit Kumar; Mathpal, Mohan Chandra; Kumar, Promod; Gairola, S.P.; Agrahari, Vivek; Martinez, Marco Antonio Rodriguez; Aragón, F.F.H.; Soler, Maria A. G.; Swart, H.C.; Agarwal, Arvind

doi:10.1016/j.jallcom.2020.154836

Cited by 23 publications

(3 citation statements)

References 28 publications

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“…Structure of the samples was studied by Raman spectroscopy (Figure 6). Spectra of all the samples contain peaks typical of volume vibrations of SnO 2 : 625 cm −1 (A1g), 762 cm −1 (B2g), 472 cm −1 (Eg), and 132 cm −1 (B1g) [39][40][41]. Numbers of asterisks marked peaks with low intensity correspond to phonon surface vibrations.…”

Section: Resultsmentioning

confidence: 99%

Template-Assisted SnO2: Synthesis, Composition, and Photoelectrocatalytical Properties

et al. 2023

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A series of tin oxides were synthesized with polystyrene microspheres (250 nm) as the template. It was shown that an increase in the template content led to increasing specific pore volume and to the formation of bimodal pore structure with pores of 9 and 70 nm in diameter. Addition of cetyltrimethylammonium bromide (CTAB) during synthesis led to the formation of friable structures (SEM data), to an increase in the average pore diameter from 19 to 111 nm, and to the formation of macropores of 80–400 nm in size. All materials had similar surface properties and cassiterite structure with 5.9–10.8 nm coherent scattering region (XRD data). Flat-band potentials of the samples were determined and their photoelectrocatalytic properties to oxidation of water and methanol were studied in the potential range of 0.4–1.6 V RHE. It was shown that the sample obtained using CTAB was characterized by lower flat-band potential value, but appeared significantly higher photocurrent in methanol oxidation, which resulted from enhanced macro-meso-porous structure to facilitate methanol pore diffusion.

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Section: Resultsmentioning

confidence: 99%

Template-Assisted SnO2: Synthesis, Composition, and Photoelectrocatalytical Properties

et al. 2023

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“…The precipitates were dried at 80 °C followed by drying in furnace at 400 °C for 4 h. The final Ln 3+ (Ce 3+ ‐Pr 3+ ‐Nd 3+ ):SnO 2 electro‐catalyst was stored for use in making electrode for water splitting and super‐capacitance investigations. [ 12 ]…”

Section: Methodsmentioning

confidence: 99%

Sustainability Consolidated Ln³⁺(Ce³⁺‐Pr³⁺‐Nd³⁺):SnO₂ System for Variegated Electrochemical and Photovoltaic Applications

Jaffri

Ahmad

Abrahams

et al. 2023

Advanced Sustainable Systems

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This work for the first time develops and employs the novel cerium‐praseodymium‐neodymium oxide co‐doped tin oxide (Ln3+(Ce3+‐Pr3+‐Nd3+):SnO2) system for varied energy applications including electro‐catalytic, super‐capacitive, and photovoltaic conversion potential. The outstanding optical, compositional, crystalline, and morphological aspects of the synthesized material express its effectiveness for energy related micro‐electrochemical applications. Bandgap narrowing due to lanthanide doping and acquiring cassiterite crystalline phase results in the auspicious output. O2 and H2 evolution of the developed electro‐catalyst expresses superior energy production with lower overpotential values of 95 mV for O2 and 131 mV toward H2. Fabricated electrode expresses an impressive charge storage potential with the specific capacitance of 151.62 F g−1. Also, this electrode has an extended service life for 100 min showing its ultra‐durability for commercial applications. Ln3+(Ce3+‐Pr3+‐Nd3+):SnO2 is used as an electron transport layer in the cesium based solar cells with the power conversion efficiency of 12.49%, short circuit current of 19.63 mA cm−1, and open circuit voltage of 1.2 V under artificial sun with negligible hysteresis. Ln3+(Ce3+‐Pr3+‐Nd3+):SnO2 is an effective material with the perfect bandgap tuned exceeding the pristine material for diverse energy applications marked by profound sustainability and economic viability.

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“…The peak at 215 cm −1 (δ) may arise due to the presence The Raman spectra (Figure 1b) of a SnO 2 phase are characterized by the presence of main peaks at 631 cm −1 (A 1g ), 773 cm −1 (B 2g ) and 474 cm −1 (E g ). [46][47][48]. For sample TO4, a large band is observed at 576 cm −1 (ε), characteristic of an amorphous phase with small particle sizes and surface defects [49][50][51].…”

Section: Physico-chemical Propertiesmentioning

confidence: 98%

Flat-Band Potential Determination and Catalytical Properties of Sn3O4/SnO2 Heterostructures in the Photo-Electrooxidation of Small Organic Molecules under Ultraviolet (370 nm) and Blue (450 nm) Light

Gribov,

Koshevoy,

Kuznetsov

et al. 2023

Materials

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Sn3O4 are promising semiconductor materials due to their visible light absorption ability. In this work, a series of materials, such as SnO2, Sn3O4 and Sn3O4/SnO2 heterostructures, with different phase ratios were prepared using hydrothermal synthesis. The materials were characterized using X-ray diffraction (XRD), Raman and diffuse reflectance spectroscopy (DRS), high resolution transmission electron microscopy (HRTEM), nitrogen adsorption (BET). Flat-band potentials (EFB) of the samples were determined using the photocurrent onset potential (POP) method. It was shown that the potentials obtained with open circuit potential measurements versus illumination intensity (OCP) likely corresponded to the EFB of SnO2 nanoparticles in heterostructures due to interfacial electron transfer from the conducting band of Sn3O4 to that of SnO2. The photo-electrooxidation processes of a series of organic substrates were studied in the potential range of 0.6–1.4 V vs. RHE under irradiation with ultraviolet (λ = 370 nm) and visible (λ = 450 nm) light. The Sn3O4 sample showed high activity in the photo-electrooxidation of acetone and formic acid in visible light. The Sn3O4/SnO2 samples exhibited noticeable activity only in the oxidation of formic acid. The presence of the SnO2 phase in the Sn3O4/SnO2 samples increased the photocurrent values under ultraviolet illumination, but significantly reduced the oxidation efficiency in visible light.

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Observations of phonon anharmonicity and microstructure changes by the laser power dependent Raman spectra in Co doped SnO2 nanoparticles

Cited by 23 publications

References 28 publications

Template-Assisted SnO2: Synthesis, Composition, and Photoelectrocatalytical Properties

Template-Assisted SnO2: Synthesis, Composition, and Photoelectrocatalytical Properties

Sustainability Consolidated Ln³⁺(Ce³⁺‐Pr³⁺‐Nd³⁺):SnO₂ System for Variegated Electrochemical and Photovoltaic Applications

Flat-Band Potential Determination and Catalytical Properties of Sn3O4/SnO2 Heterostructures in the Photo-Electrooxidation of Small Organic Molecules under Ultraviolet (370 nm) and Blue (450 nm) Light

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Observations of phonon anharmonicity and microstructure changes by the laser power dependent Raman spectra in Co doped SnO2 nanoparticles

Cited by 23 publications

References 28 publications

Template-Assisted SnO2: Synthesis, Composition, and Photoelectrocatalytical Properties

Template-Assisted SnO2: Synthesis, Composition, and Photoelectrocatalytical Properties

Sustainability Consolidated Ln3+(Ce3+‐Pr3+‐Nd3+):SnO2 System for Variegated Electrochemical and Photovoltaic Applications

Flat-Band Potential Determination and Catalytical Properties of Sn3O4/SnO2 Heterostructures in the Photo-Electrooxidation of Small Organic Molecules under Ultraviolet (370 nm) and Blue (450 nm) Light

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Sustainability Consolidated Ln³⁺(Ce³⁺‐Pr³⁺‐Nd³⁺):SnO₂ System for Variegated Electrochemical and Photovoltaic Applications