Visible light induced methylene blue dye degradation photo-catalyzed by WO3/graphene nanocomposites and the mechanism

Gan, Lu; Xu, Lijie; Shang, Songmin; Zhou, Xiaoyan; Meng, Liang

doi:10.1016/j.ceramint.2016.06.160

Cited by 90 publications

(32 citation statements)

References 29 publications

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“…For CYL, BYL, and CYH, relatively more intermediates and byproducts were generated during oxidative decomposition, as shown in Figure ; they might have had a strong shielding effect on OH•. On the other hand, the generated intermediates and byproducts might have made the iron ions inactive by consuming them; thus, CYL, BYL, and CYH exhibited a relatively slow decomposition rate. The sulfonic acid group in WAYL or AHL could have easily hydrolyzed under the acidic conditions created by H 2 O 2 , and the hydrolyzed products might have had good resistance to oxidative decomposition.…”

Section: Resultsmentioning

confidence: 96%

Fibrous material based on a combination of poly(acrylic acid‐co‐hydroxyethyl methacrylate) with iron ions as a heterogeneous Fenton catalyst for dye oxidative decomposition

et al. 2017

J of Applied Polymer Sci

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The Fenton method has been used to remedy dye wastewater because hydroxyl radicals generated from the Fenton reaction can oxidize the dye into small molecules. In comparison with a homogeneous reaction, a heterogeneous reaction with a solid material as a catalyst is a more appropriate alternative for dye wastewater treatment. Because of the large specific surface area and excellent applicability, a novel fibrous material based on a combination of functional polymer with iron ions was designed in this study and used as a heterogeneous catalyst for dye wastewater treatment by the Fenton method. The fibrous material was found to have good catalytic activity for the oxidative decomposition of a variety of dyes and good reusability; additionally, the fibrous material could remove the dye to a greater extent and leave fewer iron ions in the treated wastewater than a homogeneous Fenton catalyst such as iron(II) chloride (FeCl2). What is more, the fibrous material could adsorb the residual iron ions from the treated wastewater and make these iron ions take part in the next catalyzation. The previous results make us believe that the prepared fibrous material might be used to create a green approach for dye wastewater treatment. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44875

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Section: Resultsmentioning

confidence: 96%

Fibrous material based on a combination of poly(acrylic acid‐co‐hydroxyethyl methacrylate) with iron ions as a heterogeneous Fenton catalyst for dye oxidative decomposition

et al. 2017

J of Applied Polymer Sci

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“…When solar light falls on the photocatalyst and electron jumps from valance band to conduction band, electron‐hole pairs are formed under solar light. This electron‐hole pair generation is based on the intensity of solar spectrum as well as the energy band gap of the material . When electrons are moved in conduction band, then a flow of charges is established in the circuit.…”

Section: Renewable Sources Of Energy Productionmentioning

confidence: 99%

“…This electron-hole pair generation is based on the intensity of solar spectrum as well as the energy band gap of the material. [67][68][69] When electrons are moved in conduction band, then a flow of charges is established in the circuit. For water splitting, the reduction potential of water is 1.23 V that is the minimum potential required to reduce the water.…”

Section: Photoelectrochemical Reactionmentioning

confidence: 99%

A review on copper vanadate‐based nanostructures for photocatalysis energy production

et al. 2018

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Summary The economic, social, and environmental aspects are important that should be notable before the selection of a method for the production of energy. Various renewable energy sources are used like hydropower, biomass, biofuel, geothermal energy, and wind energy for the production of sustainable energy that are excellent approaches to fulfill energy environmental energy demands. Renewable sources of energy give an excellent chance to extenuate the gas emission in greenhouse and reduction of global warming with the help of renewable sources of energy. The importance and utilization of the variety of renewable sources of energy are elaborated in this article. The emerging and exploring technique for the production of energy is the photocatalysis. In photocatalysis, solar spectrum is the extraneous source that is used with water to produce hydrogen energy (green energy) by the water splitting under the shower of the solar spectrum. The solar spectrum contains heat and intensity of light from which light spectrum is the abundantly used for the splitting of water. The photocatalyst is the key factor to initiate the reaction depending upon the energy band gap by absorbing the energy from the spectrum of the sun. Semiconducting materials having lower forbidden energy band gap are the basic requirements to use them as a photocatalyst for photocatalysis. Copper vanadate and their composites are the promising materials that are used as photocatalyst for the production of hydrogen energy. Copper vanadate is the focusing material that can be used as photocatalyst. It is an n‐type semiconducting material with 2 eV indirect energy band gap having monoclinic structural phase which is tuned by the doping of metals like chromium, molybdenum, and silver to reduce the grain size and energy band gap and increase the surface area and optical absorption of solar light only to enhance the photocatalytic performance towards the production of hydrogen energy by water splitting in the presence of solar light.

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“…Therefore, executing research for the production of green energy and removal of harmful pollutant dyes from wastewater has become the passion for global researchers, which could offer eco‐friendly, cost‐effective means with excellent efficiency . Significant work conceded on the production of energy and removal of dangerous dyes from wastewater through various biological, chemical, and physical methods . However, all these processes, besides advantages, have various drawbacks comprising high operating cost and low efficiency for H 2 evolution, incapability to degrade harmful dyes completely, generation of dangerous byproducts, and essential high‐temperature along‐with pH control .…”

Section: Introductionmentioning

confidence: 99%

Role of fullerene to improve the WO₃ performance for photocatalytic applications and hydrogen evolution

et al. 2018

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Summary Highly efficient and stable fullerene‐WO3 composites were prepared through hydrothermal method for photocatalytic applications and evolution of green hydrogen energy under visible light irradiation. The prepared nanostructures were characterized through scanning electron microscopy, X‐ray diffractometer, energy‐dispersive X‐ray, Brunauer‐Emmett‐Teller, ultraviolet‐visible spectrometer, and photoluminescence spectroscopy to investigate morphological, structural, elemental composition, surface area, and optical properties of prepared samples. The presence of fullerene in WO3 could tune the morphology, crystallographic structure, and optical properties of the as‐prepared nanostructures. The highest photocatalytic activity was achieved at 4% fullerene contents; however, further increase in doping contents may lead to lower photocatalytic performance. The improved photocatalytic performance was attributed to 3 factors, namely, (1) higher surface area, (2) extended visible light region, and (3) inhibited recombination losses.

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Visible light induced methylene blue dye degradation photo-catalyzed by WO3/graphene nanocomposites and the mechanism

Cited by 90 publications

References 29 publications

Fibrous material based on a combination of poly(acrylic acid‐co‐hydroxyethyl methacrylate) with iron ions as a heterogeneous Fenton catalyst for dye oxidative decomposition

Fibrous material based on a combination of poly(acrylic acid‐co‐hydroxyethyl methacrylate) with iron ions as a heterogeneous Fenton catalyst for dye oxidative decomposition

A review on copper vanadate‐based nanostructures for photocatalysis energy production

Role of fullerene to improve the WO₃ performance for photocatalytic applications and hydrogen evolution

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Visible light induced methylene blue dye degradation photo-catalyzed by WO3/graphene nanocomposites and the mechanism

Cited by 90 publications

References 29 publications

Fibrous material based on a combination of poly(acrylic acid‐co‐hydroxyethyl methacrylate) with iron ions as a heterogeneous Fenton catalyst for dye oxidative decomposition

Fibrous material based on a combination of poly(acrylic acid‐co‐hydroxyethyl methacrylate) with iron ions as a heterogeneous Fenton catalyst for dye oxidative decomposition

A review on copper vanadate‐based nanostructures for photocatalysis energy production

Role of fullerene to improve the WO3 performance for photocatalytic applications and hydrogen evolution

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Role of fullerene to improve the WO₃ performance for photocatalytic applications and hydrogen evolution