Polypyrrole-TiO2 composite for removal of 4-chlorophenol and diclofenac

Silvestri, Siara; Burgo, Thiago A. L.; Dias-Ferreira, Célia; Labrincha, J.A.; Tobaldi, David Maria

doi:10.1016/j.reactfunctpolym.2019.104401

Cited by 39 publications

(26 citation statements)

References 71 publications

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“…It is well known that catalysts with lower E g values perform better catalytic activity. 8,11,13,20,24,25 Therefore, the sample with higher content of TiO 2 (B10T) was afterward characterized and tested in the adsorption and photocatalysis experiments.…”

Section: Resultsmentioning

confidence: 99%

“…Aiming at the appreciation of this residue, using a waste for the removal of environmental pollutants. 13,14,19,20 MDF biochar provides porosity to the composite, increasing surface area, facilitating material removal from the solution for later recycling, reducing material loss in the solution, improving photocatalytic properties. To date there are no reports in the literature of the use of MDF biochar as a support for TiO 2 .…”

Section: Introductionmentioning

confidence: 99%

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Preparation of TiO₂ supported on MDF biochar for simultaneous removal of methylene blue by adsorption and photocatalysis

Silvestri

Stefanello

Sulkovski

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND This article reports for the first time the preparation and characterization of biochar/titanium dioxide (TiO2) composites by pyrolysis from medium‐density fiberboard (MDF) biomass. Their adsorptive and photocatalytic activities were evaluated by removal of methylene blue (MB) dye from aqueous solutions with and without UV‐light irradiation. RESULTS Characterization results suggested that the composite have different intrinsic characteristics in relation to the precursors. The biochar and TiO2 amounts of the composite significantly affected its performance. The MB removal efficiency with 1 g L−1 of the composite with 10% w/w TiO2 (B10T sample) was 2.3 and 2.2 times faster than that the B5T and B1T samples, respectively, and 1.5 times faster than TiO2 alone. CONCLUSION The loading of TiO2 significantly enhanced the adsorption performance of the composite and factors such as specific surface area, pore volume and pore size of the biochar synergistically promoted the photocatalytic activity of TiO2, coupled with a lower band gap for all composites produced. Both adsorption and photocatalytic efficiencies were confirmed to contribute to the degradation of the aqueous solution of MB by the hydroxyl radical (•OH) in lower molecular mass by‐products. The synthesized composite is a promising alternative sustainable material for removing chemical contaminants, since the biochar used as a support comes from the waste of the furniture industry. © 2019 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Preparation of TiO₂ supported on MDF biochar for simultaneous removal of methylene blue by adsorption and photocatalysis

Silvestri

Stefanello

Sulkovski

et al. 2019

J of Chemical Tech & Biotech

Self Cite

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“…The TiO 2 /PPy surface hybrids linked by N-Ti covalent bonds obtained excellent photocurrent signals and 4.5 times superior than pure TiO 2 for MO photodegradation performance, which proved again that the tight combination of the surface hybrid interface is conducive to charge transfer and interface stability. 103 In addition to the application of PPy surface hybridization to oxidative degradation of organic pollutants, 106,[206][207][208] its photogenerated electrons can also be used for reduction reactions. For example, the activity of reducing Cr(VI) to Cr(III) is increased by 3.45 times indicating that the photogenerated electrons and holes separated by the interface are effectively transported to the surface of inorganic semiconductor and PPy, respectively.…”

Section: Polypyrrolementioning

confidence: 99%

Photocatalytic activity enhanced via surface hybridization

Guo

et al. 2020

Carbon Energy

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Surface hybrid inorganic semiconductors photocatalysts with π conjugated structure have recently been widely used in the field of photocatalytic environmental remediation and energy conversion. Surface hybridization is considered to be an efficient way to significantly enhance the photocatalytic activity by several times, completely inhibit photocorrosion of inorganic photocatalysts and expand the spectral response range of photocatalysts. This review provides a comprehensive overview of the surface hybridization definition, the principle of enhancing photocatalytic performance and the control factors of surface hybridization to promote photoactivity. Summarize the preparation and structural identification method of the surface hybrid photocatalyst. Special emphasis is placed on the various photocatalytic system construction of surface hybridization. The development of surface hybrid photocatalysts for pollutant degradation and energy conversion are further presented. Finally, the challenges and future development prospects of surface hybridization in photocatalysis are discussed. We hope this critical review can provide a clear picture of the state‐of‐the‐art achievements and facilitate the applications of surface hybrid photocatalysts in environmental remediation and energy conversion.

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“…Another important conductive polymer is represented by polypyrrole (PPy), mostly used to produce nanohybrid photocatalysts for photodegradation of organic pollutants, and the photocatalytic performances of PPy-based materials have been affected by the fabrication method and type of irradiated light [277]. Many examples of hybrid nanomaterials with photocatalytic properties have been recently reported, in which PPy has been combined with different semiconductor metal oxides, such as TiO 2 [290,291] , for pollutants degradation or hydrogen production, ZnO [292][293][294], and its derivatives doped with other metals, ZnWO 4 [295], Fe 2 O 3 [296], or Fe 3 O 4 [297][298][299].…”

Section: Conductive Polymers-based Hybrid Nanomaterialsmentioning

confidence: 99%

Photosensitive Hybrid Nanostructured Materials: The Big Challenges for Sunlight Capture

2020

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Solar radiation is becoming increasingly appreciated because of its influence on living matter and the feasibility of its application for a variety of purposes. It is an available and everlasting natural source of energy, rapidly gaining ground as a supplement and alternative to the nonrenewable energy feedstock. Actually, an increasing interest is involved in the development of efficient materials as the core of photocatalytic and photothermal processes, allowing solar energy harvesting and conversion for many technological applications, including hydrogen production, CO2 reduction, pollutants degradation, as well as organic syntheses. Particularly, photosensitive nanostructured hybrid materials synthesized coupling inorganic semiconductors with organic compounds, and polymers or carbon-based materials are attracting ever-growing research attention since their peculiar properties overcome several limitations of photocatalytic semiconductors through different approaches, including dye or charge transfer complex sensitization and heterostructures formation. The aim of this review was to describe the most promising recent advances in the field of hybrid nanostructured materials for sunlight capture and solar energy exploitation by photocatalytic processes. Beside diverse materials based on metal oxide semiconductors, emerging photoactive systems, such as metal-organic frameworks (MOFs) and hybrid perovskites, were discussed. Finally, future research opportunities and challenges associated with the design and development of highly efficient and cost-effective photosensitive nanomaterials for technological claims were outlined.

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Polypyrrole-TiO2 composite for removal of 4-chlorophenol and diclofenac

Cited by 39 publications

References 71 publications

Preparation of TiO₂ supported on MDF biochar for simultaneous removal of methylene blue by adsorption and photocatalysis

Preparation of TiO₂ supported on MDF biochar for simultaneous removal of methylene blue by adsorption and photocatalysis

Photocatalytic activity enhanced via surface hybridization

Photosensitive Hybrid Nanostructured Materials: The Big Challenges for Sunlight Capture

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Polypyrrole-TiO2 composite for removal of 4-chlorophenol and diclofenac

Cited by 39 publications

References 71 publications

Preparation of TiO2 supported on MDF biochar for simultaneous removal of methylene blue by adsorption and photocatalysis

Preparation of TiO2 supported on MDF biochar for simultaneous removal of methylene blue by adsorption and photocatalysis

Photocatalytic activity enhanced via surface hybridization

Photosensitive Hybrid Nanostructured Materials: The Big Challenges for Sunlight Capture

Contact Info

Product

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Preparation of TiO₂ supported on MDF biochar for simultaneous removal of methylene blue by adsorption and photocatalysis

Preparation of TiO₂ supported on MDF biochar for simultaneous removal of methylene blue by adsorption and photocatalysis