Synthesis of a high-surface area V2O5/TiO2–SiO2catalyst and its application in the visible light photocatalytic degradation of methylene blue

Adepu, Ajay Kumar; Goskula, Srinath; Chirra, Suman; Siliveri, Suresh; Gujjula, Sripal Reddy; Narayanan, Vijaykrishnan

doi:10.1039/c9ra03866c

Cited by 24 publications

(5 citation statements)

References 42 publications

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“…Furthermore, the presence of V 4+ , as evidenced by the XPS result in our work, supports and provides the higher active sites. It also provides high electrical conductivity, leading to boosting the separation and transfer of photogenerated charge carriers, which is important for photocatalytic reactions, as reported previously [ 39 , 40 , 41 , 42 ]. In this process, it was indicated that photoelectrons and holes were well separated and their recombinations were reduced.…”

Section: Resultsmentioning

confidence: 64%

Porous V2O5/TiO2 Nanoheterostructure Films with Enhanced Visible-Light Photocatalytic Performance Prepared by the Sparking Method

et al. 2020

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Porous V2O5/TiO2 nanoheterostructure films with different atomic ratios of Ti/V (4:1, 2:1, 1:1, and 1:2) were synthesized by a sparking method for the first time. The sparking method, which is a simple and cost-effective process, can synthesize highly porous and composite films in one step. Field-emission scanning electron microscope (FE-SEM) images revealed the porosity morphology of all prepared samples. V2O5/TiO2 nanoheterostructure films were confirmed by Raman spectroscopy, high-resolution transmission electron microscopy (HRTEM), and X-ray photoelectron spectroscopy (XPS). The secondary particle size and band gap of the samples were highly correlated to the V2O5 proportion, resulting in enhanced visible-light absorbance. V2O5/TiO2 nanoheterostructure films at an atomic ratio of 1:1 showed the highest photocatalytic performance, which improved the degradation rate up to 24% compared to pure TiO2 film. It is believed that the formed nanoheterostructure and greater portion of V4+ ions are reflected by this ratio.

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Section: Resultsmentioning

confidence: 64%

Porous V2O5/TiO2 Nanoheterostructure Films with Enhanced Visible-Light Photocatalytic Performance Prepared by the Sparking Method

et al. 2020

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“…5 b,c). From the results, all prepared films produced under magnetic field had prominent photocatalytic performances over the TV sample possibly due to their narrowed bandgap, re-crystallization, high porosity, and the strongly interface between TiO 2 and V 2 O 5 nanoparticles 30 , 31 . Unbelievable, the TVH sample provide great photocatalytic efficiency than post-annealed TVA sample.…”

Section: Resultsmentioning

confidence: 98%

Effect of magnetic field on improvement of photocatalytic performance of V2O5/TiO2 nanoheterostructure films prepared by sparking method

Pooseekheaw

Thongpan

Kantarak

et al. 2022

Sci Rep

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Our porous V2O5/TiO2 nanoheterostructure films (with a Ti/V atomic ratio of 1:1) were fabricated via a single-step sparking method using a strong magnetic field (0.5 T) without annealing requirement for the first time. We found that the magnetic flux arrangement has effect on film crystallization, unique morphology, large specific surface area, and surprisingly controllable phase structure of the films. An amorphous TV film was transformed to the TiO2 (anatase/rutile) phase (for TVN) and V2O5–VO2 mixed-phase (for TVH) without destroying the mesopores from an annealing process. Moreover, the TVH sample able to improve the degradation rate up to 270% compared with pre-annealed TV films and up to 30% with post-annealed (400 °C) TVA films. In this paper, the influence of magnetic flux arrangement on structural, morphological, optical, and photocatalytic properties of prepared sample have been investigated and reported.

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“…These images highlight the successful distribution of both Fe and dopant nanoparticles on the BC surface. The closely packed surface morphology of the prepared BC composite photocatalyst is significant, as it supports efficient charge carrier separation [30]. The proximity between the photocatalyst and BC, acting as a substrate and an electron sink, is advantageous for prolonging the photocatalytic activation of the composite photocatalyst.…”

Section: Characterization Of Catalystmentioning

confidence: 99%

Visible Light-Driven Organic Pollutant Removal Using Fe-Based Photocatalysts Supported by Wheat Straw Biochar

Subramaniam,

Zheng,

et al. 2024

Catalysts

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Researchers are actively pursuing the development of highly functional photocatalyst materials using environmentally friendly and sustainable resources. In this study, wheat straw biochar (BC), a by-product of biomass pyrolysis, was explored as a green, porous substrate and a carbon-based sensitizer to activate Fe-based photocatalysts under visible light. The research also delved into the impact of doping copper (Cu), chromium (Cr), and zinc (Zn) to enhance the photocatalytic activity of BC-Fe-based catalysts for the removal of methylene orange (MO) from water. Characterization results revealed a more than twofold increase in surface area and greater porosity, contributing to improved radical generation. BC demonstrated its dual functionality as a high surface area substrate and an electron sink, facilitating multistep electron movement and enhancing the photoactivity of the composite catalyst. Photodegradation experiments indicated that the combination of BC with Fe and Zn exhibited the highest performance, removing over 80% of MO within 120 min. Parametric studies highlighted the preference for an alkali pH, and the photocatalyst demonstrated efficient performance up to 30 ppm of dye. Radical scavenging experiments identified •OH and h+ as the most generated radicals. This study establishes that the green and sustainable BC holds promise as a material in the quest for more sustainable photocatalysts.

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Synthesis of a high-surface area V₂O₅/TiO₂–SiO₂catalyst and its application in the visible light photocatalytic degradation of methylene blue

Abstract: In the present study, we synthesized several high-surface area V2O5/TiO2–SiO2 catalysts (vanado titanium silicate, VTS). The synthesized materials are characterized by PXRD, FE-SEM/EDAX, TEM, BET-surface area, FT-IR, UV-Vis, XPS, fluorescence and photocatalytic studies.

Cited by 24 publications

References 42 publications

Porous V2O5/TiO2 Nanoheterostructure Films with Enhanced Visible-Light Photocatalytic Performance Prepared by the Sparking Method

Porous V2O5/TiO2 Nanoheterostructure Films with Enhanced Visible-Light Photocatalytic Performance Prepared by the Sparking Method

Effect of magnetic field on improvement of photocatalytic performance of V2O5/TiO2 nanoheterostructure films prepared by sparking method

Visible Light-Driven Organic Pollutant Removal Using Fe-Based Photocatalysts Supported by Wheat Straw Biochar

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