A Review on Visible Light Active Perovskite-Based Photocatalysts

Kanhere, Pushkar D.; Chen, Zhong

doi:10.3390/molecules191219995

Cited by 522 publications

(260 citation statements)

References 134 publications

(137 reference statements)

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“…Pure TiO 2 catalyst was prepared by the sol-gel method as follows: 15 ml of tetraisopropyl orthotitanate Ti(OC 3 H 7 ) 4 (TTIP, Sigma, >99%) was added to an ethanol-HNO 3 mixture (Merck, >99%) with a pH of about 3-4 and stirred for 10 min to obtain a transparent solution. The solution was added drop wise to 10 ml of deionized water, stirred at room temperature for 2 h to form a highly viscous solution.…”

Section: Catalyst Synthesismentioning

confidence: 99%

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Thin film nano-photocatalyts with low band gap energy for gas phase degradation of p -xylene: TiO ₂ doped Cr, UiO66-NH ₂ and LaBO ₃ (B = Fe, Mn, and Co)

Lộc

Nguyen

Tri

et al. 2017

Adv. Nat. Sci: Nanosci. Nanotechnol.

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By dip-coating technique the thin films of nano-photocatalysts TiO2, Cr-doped TiO2, LaBO3 perovskites (B = Fe, Mn, and Co) prepared by sol-gel method, and UiO66-NH2 prepared by a solvothermal were obtained and employed for gas phase degradation of p-xylene. Physicochemical characteristics of the catalysts were examined by the methods of BET, SEM, TEM, XRD, FT-IR, TGA, Raman and UV–vis spectroscopies. The thickness of film was determined by a Veeco-American Dektek 6M instrument. The activity of catalysts was evaluated in deep photooxidation of p-xylene in a microflow reactor at room temperature with the radiation sources of a UV (λ = 365 nm) and LED lamps (λ = 400–510 nm). The obtained results showed that TiO2 and TiO2 doped Cr thin films was featured by an anatase phase with nanoparticles of 10–100 nm. Doping TiO2 with 0.1%mol Cr2O3 led to reduce band gap energy from 3.01 down to 1.99 eV and extend the spectrum of photon absorption to the visible region (λ = 622 nm). LaBO3 perovkite thin films were also featured by a crystal phase with average particle nanosize of 8–40 nm, a BET surface area of 17.6–32.7 m2 g−1 and band gap energy of 1.87–2.20 eV. UiO66-NH2 was obtained in the ball shape of 100–200 nm, a BET surface area of 576 m2 g−1 and a band gap energy of 2.83 eV. The low band gap energy nano-photocatalysts based on Cr-doped TiO2 and LaBO3 perovskites exhibited highly stable and active for photo-degradation of p-xylene in the gas phase under radiation of UV–vis light. Perovskite LaFeO3 and Cr–TiO2 thin films were the best photocatalysts with a decomposition yield being reached up to 1.70 gp-xylene/gcat.

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Section: Catalyst Synthesismentioning

confidence: 99%

“…Some perovskite materials have been used as photocatalysts for treatment of pollutants in waste water under visible light irradiation [4]. The perovskite-like oxides LaBO 3 (B = Cu, Fe, Co, Ni, and Mn) were examined in wet peroxide oxidation of phenol as a model organic substance.…”

Section: Introductionmentioning

confidence: 99%

Thin film nano-photocatalyts with low band gap energy for gas phase degradation of p -xylene: TiO ₂ doped Cr, UiO66-NH ₂ and LaBO ₃ (B = Fe, Mn, and Co)

Lộc

Nguyen

Tri

et al. 2017

Adv. Nat. Sci: Nanosci. Nanotechnol.

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“…Depending on the type of the ions, they can form various perovskite crystal geometries with different features. The cations in the lattice are able to enhance and modify the band structure, which is particularly important from the point of view of photophysical properties [63,64]. Thus, perovskites as an active layer in photovoltaic systems can deliver high opencircuit voltages and lead to the harvesting of light from a broad spectrum [64].…”

Section: Perovskite Solar Cells and Quantum Dots Photovoltaicsmentioning

confidence: 99%

Synthesis of Photoactive Materials by Sonication: Application in Photocatalysis and Solar Cells

Colmenares

Kuna

Lisowski

2016

Topics in Current Chemistry Collections

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In recent years, a good number of methods have become available for the preparation of an important group of photoactive materials for applications in photocatalysis and solar cells. Nevertheless, the benefits derived from preparing those materials through unconventional approaches are very attractive from the green chemistry point of view. This critical review work is focused on sonication as one of these promising new synthetic procedures that allow control over size, morphology, nanostructure and tuning of catalytic properties. Ultrasound-based procedures offer a facile, versatile synthetic tool for the preparation of light-activated materials often inaccessible through conventional methods.

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“…Spinel lanthanum chromites (LaCrO 3 ) is one of the perovskite materials that has been extensively studied due to its applicability as interconnector for solid oxide fuel cell (SOFC's), high chemical stability, good electrical properties at high temperature 24 -26 , and catalytic activity for total oxidation 27 , partial oxidation 28 , oxidative dehydrogenation 29 , and photocatalyst 30 . Perovskite compounds have been prepared using various methods such as hydrothermal 19,31,32 , precipitation 16,33 , co-precipitation 34,35 , autocombustion 36,37 , and sol -gel 38 -40 .…”

Section: Introductionmentioning

confidence: 99%

Characteristics of Nano-Size LaCrO3 Prepared Through Sol-Gel Route Using Pectin as Emulsifying Agent

Situmeang¹,

Supryanto²,

Kahar³

et al. 2017

Orient. J. Chem

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In this study, nano-size LaCrO 3 was prepared through sol-gel route using pectin as emulsifying agent, followed by freeze -drying to obtain solid sample. The sample was prepared by mixing the solution of La(NO 3 ) 3 .6 H 2 O and Cr(NO 3 ) 3 .9 H 2 O with pectin solution under magnetic stirring. The sample was frozen and subsequently subjected to freeze -drying and calcination treatment at temperatures of 600, 700 and 800 ºC for 6 h. The calcined samples were characterized with several techniques. The phase composition was evaluated using the X-ray diffraction (XRD) technique, followed by crystallite size calculation using Scherrer Methods. The functionality of sample was identified using Fourier transform infrared (FTIR) spectroscopy, surface structure in three dimensional images was analyzed using Transmission electron microscopy (TEM), and particle size distribution was determined by Particles Size Distribution (PSA). The results of XRD characterization indicated that materials consist of various crystalline phases, with LaCrO 3 as a major phase. FTIR Analysis revealed the existence of both Lewis and BrØnsted -Lowry acid sites, with Lewis acid as the prominent sites, represented by the absorption band located at around 1636 cm -1 . The samples were found to display relatively homogeneous surface morphology, having the crystallite size in the range of 24 to 25 nm according to Scherrer equation. The PSA analyses revealed increased relative percentages of nano-size portion in the sample from 22 to 89% as temperatures increased from 600 to 800 ºC, with the particle size in the range of 30 to 35 nm as seen by the TEM .

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A Review on Visible Light Active Perovskite-Based Photocatalysts

Cited by 522 publications

References 134 publications

Thin film nano-photocatalyts with low band gap energy for gas phase degradation of p -xylene: TiO ₂ doped Cr, UiO66-NH ₂ and LaBO ₃ (B = Fe, Mn, and Co)

Thin film nano-photocatalyts with low band gap energy for gas phase degradation of p -xylene: TiO ₂ doped Cr, UiO66-NH ₂ and LaBO ₃ (B = Fe, Mn, and Co)

Synthesis of Photoactive Materials by Sonication: Application in Photocatalysis and Solar Cells

Characteristics of Nano-Size LaCrO3 Prepared Through Sol-Gel Route Using Pectin as Emulsifying Agent

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A Review on Visible Light Active Perovskite-Based Photocatalysts

Cited by 522 publications

References 134 publications

Thin film nano-photocatalyts with low band gap energy for gas phase degradation of p -xylene: TiO 2 doped Cr, UiO66-NH 2 and LaBO 3 (B = Fe, Mn, and Co)

Thin film nano-photocatalyts with low band gap energy for gas phase degradation of p -xylene: TiO 2 doped Cr, UiO66-NH 2 and LaBO 3 (B = Fe, Mn, and Co)

Synthesis of Photoactive Materials by Sonication: Application in Photocatalysis and Solar Cells

Characteristics of Nano-Size LaCrO3 Prepared Through Sol-Gel Route Using Pectin as Emulsifying Agent

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Thin film nano-photocatalyts with low band gap energy for gas phase degradation of p -xylene: TiO ₂ doped Cr, UiO66-NH ₂ and LaBO ₃ (B = Fe, Mn, and Co)

Thin film nano-photocatalyts with low band gap energy for gas phase degradation of p -xylene: TiO ₂ doped Cr, UiO66-NH ₂ and LaBO ₃ (B = Fe, Mn, and Co)