Effect of post-growth annealing on the structural, optical and electrical properties of V 2 O 5 nanorods and its fabrication, characterization of V 2 O 5 /p-Si junction diode

N, Senthil Kumar; Raman, M. Sethu; Chandrasekaran, J.; Priya, Ruby; Chavali, Murthy; Suresh, R.

doi:10.1016/j.mssp.2015.08.020

Cited by 67 publications

(8 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…6(b). The results obtained are well-matched with the experimental results by Kumar et al [19] As a result of the quantum confinement effect, the formation and modification of discrete energy levels in nanocrystal is observed which results in enhancement in band gap of sample A. Due to the quantum confinement effect, the band gap of sample A is larger than sample B.…”

Section: Uv-visible Spectroscopysupporting

confidence: 89%

“…Apart from these, the peaks in the as-prepared sample observed at 885.58 cm -1 is attributed to asymmetric V-O-V stretching mode. [11,12,[17][18][19] Fig. 3 FT-IR spectra of (A) as prepared, (B) calcinated V 2 O 5 .…”

Section: Fourier Transform Infrared Spectroscopy (Ft-ir)mentioning

confidence: 99%

“…The effect of annealing on Raman spectra is clearly observed from the intensity and sharpness of peaks. [10,[18][19][20][21][22] (a) (b) Fig. 4 Raman spectra of (a) as-prepared, (b) annealed product V 2 O 5 .…”

Section: Raman Spectroscopymentioning

confidence: 99%

See 2 more Smart Citations

Hydrothermally Prepared Vanadium Oxide Nanostructures for Photocatalytic Application

Babar¹,

Pisal²,

Sutar³

et al. 2022

ES Energy Environ.

View full text Add to dashboard Cite

In the present work, vanadium pentoxide (V 2 O 5 ) nanoparticles have been successfully prepared by a simple hydrothermal method. The effect of annealing on the photocatalytic degradation of methylene blue (MB) dye is studied. Structure of V 2 O 5 is confirmed by X-ray diffraction (XRD) and Raman spectroscopy, while Fourier transform infrared (FTIR) spectroscopy is used for functional group detection. Agglomerated nanoparticle morphology is observed via scanning electron microscopy (SEM). The direct band gap of V 2 O 5 is 2.63-2.81 eV calculated using ultraviolet-visible (UV) spectra. Finally, the photocatalytic degradation of MB dye by V 2 O 5 is studied. The results indicate a promising and enhanced degradation property of calcinated V 2 O 5 . Very small quantity calcinated V 2 O 5 shows about 68% degradation of MB within 80 min, and the rate constant for calcinated product is 9.9 × 10 -5 s -1 .

show abstract

Section: Uv-visible Spectroscopysupporting

confidence: 89%

Section: Fourier Transform Infrared Spectroscopy (Ft-ir)mentioning

confidence: 99%

See 1 more Smart Citation

Hydrothermally Prepared Vanadium Oxide Nanostructures for Photocatalytic Application

Babar¹,

Pisal²,

Sutar³

et al. 2022

ES Energy Environ.

View full text Add to dashboard Cite

show abstract

“…This deposition process ensures the conformality and precise control over thickness (0.3 Å/cycle) enabled by the self-limiting nature of the reaction. , The intrinsic conductivity of V 2 O 5 is often increased by annealing in air in the temperature range of 200–500 °C. Annealing promotes crystal growth which ultimately increases the conductivity of V 2 O 5 . However, we only annealed the V 2 O 5 -decorated sample at a relatively low temperature of 300 °C to partially crystallize V 2 O 5 as further increase in the crystallization temperature leads to larger grain growth of crystallites, which clogs the pores and hence adversely affects the capacitance. , The observable difference in the SEM images of pristine MPC (Figure a) and deposited MPC (Figure b) confirmed the conformal coating on MPC.…”

Section: Resultsmentioning

confidence: 62%

Large-Pore Ordered Mesoporous Turbostratic Carbon Films Prepared Using Rapid Thermal Annealing for High-Performance Micro-pseudocapacitors

Bhardwaj

Pagaduan

et al. 2021

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Carbonization by rapid thermal annealing (RTA) of precursor films structured by a brush block copolymer-mediated self-assembly enabled the preparation of large-pore (40 nm) ordered mesoporous carbon (MPC)-based micro-supercapacitors within minutes. The large pore size of the fabricated films facilitates both rapid electrolyte diffusion for carbon-based electric double-layer capacitors and conformal deposition of V2O5 without pore blockage for pseudocapacitors. The pores were templated using bottlebrush block copolymers (BBCPs) via cooperative assembly of phenol-formaldehyde resin to produce microphase-segregated carbon precursor films on a variety of substrates. Ultrafast RTA processing (∼50 °C/s) at elevated temperatures (up to 1000 °C) then generated stable, conductive, turbostratic MPC films, resolving a significant bottleneck in rapid fabrication. MPC prepared on stainless steel at 900 °C demonstrated exceptionally high areal and volumetric capacitances of 6.3 mF/cm2 and 126 F/cm3 (at 0.8 mA/cm2 using 6 M KOH as the electrolyte), respectively, and 91% capacitance retention after 10,000 galvanostatic charge/discharge cycles. Post-RTA conformal V2O5 deposition yielded pseudocapacitors with 10-fold increase in energy density (20 μW h cm–2 μm–1) without adversely affecting the high power density (450 μW cm–2 μm–1). The use of RTA coupled with BBCP templating opens avenues for scalable, rapid fabrication of high-performance carbon-based micro-pseudocapacitors.

show abstract

“…UV-vis DRS is a sensitive technique to study metal coordination, for Al-and Zr-incorporated in zeolites or MCM-41 structures [26][27][28] or supported vanadium catalysts [29,30]. The DR spectra of Al-containing samples presented an It is well known that V 5+ at tetrahedral coordination sites absorbs between 240 and 350 nm, at square pyramidal coordination between 350 and 450 nm and at octahedral coordination between 450 and 600 nm [36,37]. The broad band centered at 260 nm (Fig.…”

Section: Resultsmentioning

confidence: 99%

MCM-41-supported vanadium catalysts structurally modified with Al or Zr for thiophene hydrodesulfurization

et al. 2019

View full text Add to dashboard Cite

Vanadium catalysts supported on Al(Zr)-MCM-41-type materials were prepared by impregnation. Textural and structural properties, elemental composition and electronic structure were determined by N 2 physisorption, small-angle XRD, SEM-EDX and UV-vis DRS, respectively. Al-containing materials showed mostly of Al framework and a small fraction of Al extra-framework species. Zr-containing materials presented almost exclusively small clusters of Zr x O y covering the MCM-41 matrix. Vanadium catalysts, showed the presence of isolated V 5+ species and to a lesser extent polymeric chains likely as small crystallites of V 2 O 5. The catalytic results revealed that VAlM30 catalyst, characterized by a Si/Al atomic ratio of 30, was the most active in thiophene hydrodesulfurization, which could be associated to better textural properties and high dispersion of the vanadium species.

show abstract

Effect of post-growth annealing on the structural, optical and electrical properties of V 2 O 5 nanorods and its fabrication, characterization of V 2 O 5 /p-Si junction diode

Cited by 67 publications

References 36 publications

Hydrothermally Prepared Vanadium Oxide Nanostructures for Photocatalytic Application

Hydrothermally Prepared Vanadium Oxide Nanostructures for Photocatalytic Application

Large-Pore Ordered Mesoporous Turbostratic Carbon Films Prepared Using Rapid Thermal Annealing for High-Performance Micro-pseudocapacitors

MCM-41-supported vanadium catalysts structurally modified with Al or Zr for thiophene hydrodesulfurization

Contact Info

Product

Resources

About