n-La2Ti2O7/p-LaCrO3: a novel heterojunction based composite photocatalyst with enhanced photoactivity towards hydrogen production

Nashim, Amtul; Parida, Kulamani

doi:10.1039/c4ta02401j

Cited by 84 publications

(59 citation statements)

References 35 publications

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“…Figure (a) depicts the individual scanning for La 3d state of LTO and it reveals four strong peaks. The doublet peaks located at the binding energies of 834.5 eV and 838.8 eV are assigned as La 3d5/2 where as 851.4 and 855.6 eV are assigned as La 3d3/2 states . These observed doublet peaks are well consistent with La 3+ in La atom of La 2 O 3 .…”

Section: Data Analysis and Resultssupporting

confidence: 63%

“…The chemical composition and oxidation state of the metals present in LTO has been studied through XPS measurement. [15] These observed doublet peaks are well consistent with La 3 + in La atom of La 2 O 3 . The Ti 2p region (shown in Figure 3 (b)) reveals two peaks at the binding energy of 458.4 eV ( Ti 2p3/2) and at 463.9 eV (Ti 2p1/2) confirms + 4 state of Ti in LTO.…”

Section: X-ray Photoelectron Spectroscopy (Xps)supporting

confidence: 75%

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La₂Ti₂O₇ As Nanometric Electrode Material: An Emerging Candidate For Supercapacitor Performance

et al. 2019

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In this study, first time the nanometric powder of La2Ti2O7 (abbreviated as LTO) is taken as the electrode material for supercapacitor. The prepared material is characterized by various characterization techniques to know its structural and textural properties. The specific capacitance of the La2Ti2O7 is calculated from charge discharge curve. The Nyquist plot, bode plot and the plot of real capacitance vs. imaginary capacitance is well in support of supercapacitive activity of La2Ti2O7. The La2Ti2O7 exhibits 71 F/g of specific capacitance in 2 M KOH with 95.7% retention after 5000 cycles is due to the effective access of electrolyte to the redox sites owing to its layered structure. As these finding are new to the scientific community and demonstrate the great potential of La2Ti2O7 as electrode material for supercapacitor, the current findings may give a new pave in the area of supercapacitor research.

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Section: Data Analysis and Resultssupporting

confidence: 63%

Section: X-ray Photoelectron Spectroscopy (Xps)supporting

confidence: 75%

La₂Ti₂O₇ As Nanometric Electrode Material: An Emerging Candidate For Supercapacitor Performance

et al. 2019

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“…4c. 38 The shifts of doublet peaks demonstrate that La atoms in H-KLTO and KLTO have different chemical environments as well. Lanthanum appeared as a clear doublet structure for La 3d 5/2 and La 3d 3/2 , which is specific for lanthanum bearing oxides.…”

Section: Resultsmentioning

confidence: 99%

“…The XPS spectrum of La 3d is depicted in Fig. 38 Binding energies of the La 3d core level at 836.1 eV, 840.2 eV, 852.9 eV and 857.0 eV demonstrate the +3 state of the La element in samples. The peaks at binding energies of around 853.0 eV and 855.1 eV represent the XPS peaks of La 3d 5/2 and La 3d 3/2 , respectively.…”

Section: Resultsmentioning

confidence: 99%

The hierarchical structure of cubic K_0.5La_0.5TiO₃ layers and enhanced photocatalytic hydrogen evolution after surface acidification

et al. 2015

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Transition-metal perovskite oxides possess rich functionalities in the fields of ferroelectrics, piezoelectrics, superconductors, dielectrics, fuel cells and photocatalysis. Nano-facet control of the cubic ATiO3 (A: a divalent cation) phase, a typical perovskite oxide, may result in new properties or phenomena not observable in the bulk material. Herein, we first report a puzzle-like 3D hierarchical structure constructed with K0.5La0.5TiO3 nanosheets. Surprisingly, K0.5La0.5TiO3 has a cubic symmetry similar to a SrTiO3 perovskite. The unusual phase is synthesized by a simple one-pot hydrothermal strategy without using any structure-directing agent. After modest acidification, the assembled 3D hierarchical structure is etched into a core-shell nanostructure which consists of a crystalline K0.5La0.5TiO3 core and an amorphous TiO2 shell. The acid-treated sample exhibits remarkably enhanced photocatalytic H2 production, which is over 60 times higher than the pristine sample.

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“…The photoinduced charge transfers of the nanosized LaCrO 3 , required for photocatalytic reactions, can be ensured by several electronic transitions which further contribute to the efficient photocatalytic activity. The optical band gap (E g ) of LaCrO 3 was calculated using Tauc equation 3 [32]:…”

Section: Uv-vis Diffuse Reflectance Spectramentioning

confidence: 99%

Kinetic properties and structural analysis of LaCrO₃nanoparticles

Enhessari

Salehabadi

Khoobi

et al. 2017

Materials Science-Poland

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LaCrO 3 perovskite nanopowders were successfully prepared via a sol-gel method using stoichiometric proportion of materials containing lanthanum and chromium in stearic acid complexing agent. Structural analysis of LaCrO 3 indicated an octahedral framework in its XRD pattern bearing crystallite size in the range of 28 nm. The particle sizes were confirmed by morphological scanning of the sample. The optical properties of LaCrO 3 nanopowders clearly indicated an interesting optical activity of LaCrO 3 in the UV and visible ranges. The degradation activation energy (E d ) was calculated from the output of a moderate thermal programming profile at about 207.97 kJ·mol −1 using Kissinger equation. Capacity, impedance and AC resistance of the perovskites was obtained at 2.970 nF, 2.522 MΩ and 16.19 MΩ, respectively.

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n-La₂Ti₂O₇/p-LaCrO₃: a novel heterojunction based composite photocatalyst with enhanced photoactivity towards hydrogen production

Cited by 84 publications

References 35 publications

La₂Ti₂O₇ As Nanometric Electrode Material: An Emerging Candidate For Supercapacitor Performance

La₂Ti₂O₇ As Nanometric Electrode Material: An Emerging Candidate For Supercapacitor Performance

The hierarchical structure of cubic K_0.5La_0.5TiO₃ layers and enhanced photocatalytic hydrogen evolution after surface acidification

Kinetic properties and structural analysis of LaCrO₃nanoparticles

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n-La2Ti2O7/p-LaCrO3: a novel heterojunction based composite photocatalyst with enhanced photoactivity towards hydrogen production

Cited by 84 publications

References 35 publications

La2Ti2O7 As Nanometric Electrode Material: An Emerging Candidate For Supercapacitor Performance

La2Ti2O7 As Nanometric Electrode Material: An Emerging Candidate For Supercapacitor Performance

The hierarchical structure of cubic K0.5La0.5TiO3 layers and enhanced photocatalytic hydrogen evolution after surface acidification

Kinetic properties and structural analysis of LaCrO3nanoparticles

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Product

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n-La₂Ti₂O₇/p-LaCrO₃: a novel heterojunction based composite photocatalyst with enhanced photoactivity towards hydrogen production

La₂Ti₂O₇ As Nanometric Electrode Material: An Emerging Candidate For Supercapacitor Performance

La₂Ti₂O₇ As Nanometric Electrode Material: An Emerging Candidate For Supercapacitor Performance

The hierarchical structure of cubic K_0.5La_0.5TiO₃ layers and enhanced photocatalytic hydrogen evolution after surface acidification

Kinetic properties and structural analysis of LaCrO₃nanoparticles