Optimization of CdO nanoparticles by Zr4+ doping for better photocatalytic activity

Jeejamol, D. J.; Raj, A. Moses Ezhil; Jayakumari, K.; Ravidhas, C.

doi:10.1007/s10854-017-7893-3

Cited by 29 publications

(12 citation statements)

References 73 publications

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“…First, we note that, in as‐cleaved sample, Cd‐4d 5/2 has a binding energy (BE) of 10.87 eV, higher than the value previously reported (10.40–10.54 eV). We notice that the latter values instead coincide with BE of Cd‐4d in CdO . We observe also a doublet with Cd‐4d 5/2 at 11.50 eV with weak intensity (5% of total area) and an additional feature (5% of the total area) at 9.70 eV, which is possibly coming from a small amount of carbon contamination in the sample (Figure S8, Supporting Information), as expected for components at low BE, ascribable to weakly bonded species .…”

Section: Resultssupporting

confidence: 58%

Surface Reconstruction, Oxidation Mechanism, and Stability of Cd₃As₂

Gao

Cupolillo

Nappini

et al. 2019

Adv Funct Materials

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Cadmium arsenide (Cd 3 As 2 ) has recently attracted considerable interest for the presence of 3D massless Dirac fermions with ultrahigh mobility and magnetoresistance. However, its surface properties are currently largely unexplored both theoretically and experimentally, due to the very large unit cell and the challenging growth of single-crystal samples, respectively. Here, by combining ab initio calculations with surface-science spectroscopic experiments, the presence of a surface reconstruction is unveiled in centimeterscale (112)-oriented Cd 3 As 2 single-crystal foils produced by the self-selecting vapor growth. Outermost Cd atoms descend into the As-sublayer with a subsequent self-passivation of the dangling bonds with As atoms, forming the triangle lattice previously imaged by scanning tunneling microscopy. Moreover, the oxidation mechanism of this reconstructed surface, dominated by the formation of AsOCd bonds, is revealed. Interestingly, it is found that the band structure of the reconstructed surface of Cd 3 As 2 is quite robust against surface oxidation. Both computational and experimental findings point to a successful exploitation in technology of Cd 3 As 2 single crystals.

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Section: Resultssupporting

confidence: 58%

Surface Reconstruction, Oxidation Mechanism, and Stability of Cd₃As₂

Gao

Cupolillo

Nappini

et al. 2019

Adv Funct Materials

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“…Finally, two diffraction lines at 2θ=33.07° and 38.34° were used to calculate the crystal size of CdO “Monteponite” (JCPDS # 5–0640) where a value between 44–66 nm was found for the crystallite size of CdO [28] . The XRD results of the formation of CdO and CdMoO 4 in the nanoscale, further, are consistent with previously published articles [29,30] …”

Section: Resultssupporting

confidence: 91%

“… [28] The XRD results of the formation of CdO and CdMoO 4 in the nanoscale, further, are consistent with previously published articles. [ 29 , 30 ]…”

Section: Resultsmentioning

confidence: 99%

Assessment of Lewis‐Acidic Surface Sites Using Tetrahydrofuran as a Suitable and Smart Probe Molecule

et al. 2022

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Measuring the Lewis‐acidic surface sites in catalysis is problematic when the material‘s surface area is very low (SBET ≤1 m2 ⋅ g−1). For the first time, a quantitative assessment of total acidic surface sites of very small surface area catalysts (MoO3 as pure and mixed with 5–30 % CdO (wt/wt), as well as CdO for comparison) was performed using a smart new probe molecule, tetrahydrofuran (THF). The results were nearly identical compared to using another commonly used probe molecule, pyridine. This audition is based on the limited values of the surface area of these samples that likely require a relatively moderate basic molecule as THF with pKb=16.08, rather than strong basic molecules such as NH3 (pKb=4.75) or pyridine (pKb=8.77). We propose mechanisms for the interaction of vapour phase molecules of THF with the Lewis‐cationic Mo and Cd atoms of these catalysts. Besides, dehydration of isopropyl alcohol was used as a probe reaction to investigate the catalytic activity of these catalysts to further support our findings in the case of THF in a temperature range of 175–300 °C. A good agreement between the obtained data of sample MoO3‐10 % CdO, which is characterised by the highest surface area value, the population of Lewis‐acidic sites and % selectivity of propylene at all the applied reaction temperatures was found.

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“…Furthermore, the calculation of physical parameters such as lattice constants (a, b, and c), crystallite size (D), interatomic spacings between two planes (d), unit-cell volume (v), dislocation density (d), and micro-strain (e) can be determined using equations reported in the literature. 48,49 The measured values are summarized in Table 1. It is concluded from the results that there is some variation in lattice parameters as well as in the unit cell volume of La 2 O 3 -C 60 nanocomposites identified due to the interaction of La 2 O 3 with C 60 , resulting from the shift of the diffraction peaks.…”

Section: X-ray Diffraction (Xrd)mentioning

confidence: 99%

Fabrication of fullerene-supported La₂O₃–C₆₀ nanocomposites: dual-functional materials for photocatalysis and supercapacitor electrodes

Munwar

Sardar

Mukhtar

et al. 2023

Phys. Chem. Chem. Phys.

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Optimization of CdO nanoparticles by Zr4+ doping for better photocatalytic activity

Cited by 29 publications

References 73 publications

Surface Reconstruction, Oxidation Mechanism, and Stability of Cd₃As₂

Surface Reconstruction, Oxidation Mechanism, and Stability of Cd₃As₂

Assessment of Lewis‐Acidic Surface Sites Using Tetrahydrofuran as a Suitable and Smart Probe Molecule

Fabrication of fullerene-supported La₂O₃–C₆₀ nanocomposites: dual-functional materials for photocatalysis and supercapacitor electrodes

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Optimization of CdO nanoparticles by Zr4+ doping for better photocatalytic activity

Cited by 29 publications

References 73 publications

Surface Reconstruction, Oxidation Mechanism, and Stability of Cd3As2

Surface Reconstruction, Oxidation Mechanism, and Stability of Cd3As2

Assessment of Lewis‐Acidic Surface Sites Using Tetrahydrofuran as a Suitable and Smart Probe Molecule

Fabrication of fullerene-supported La2O3–C60 nanocomposites: dual-functional materials for photocatalysis and supercapacitor electrodes

Contact Info

Product

Resources

About

Surface Reconstruction, Oxidation Mechanism, and Stability of Cd₃As₂

Surface Reconstruction, Oxidation Mechanism, and Stability of Cd₃As₂

Fabrication of fullerene-supported La₂O₃–C₆₀ nanocomposites: dual-functional materials for photocatalysis and supercapacitor electrodes