In situ growth of ZnO/Ag2O heterostructures on PVDF nanofibers as efficient visible-light-driven photocatalysts

Zang, Chuanfeng; Han, Xiangye; Chen, Hao; Zhang, Haifeng; Lei, Yonggang; Liu, Hong‐Chao; Zhang, Guangyu; Ge, Mingzheng

doi:10.1016/j.ceramint.2022.05.312

Cited by 16 publications

(2 citation statements)

References 47 publications

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“…Compared with TiO 2 , the visible light absorption region of ZnTiO 3 /TiO 2 nanocomposites was largely enhanced, which was attributed to the strong visible-light sensitive property of ZnTiO 3 . The band gap of these samples can be calculated by the UV–vis DRS absorption spectrum and eq : false( α h ν false) 2 = A ( h ν − E normalg ) where A is a constant, α is the optical absorption coefficient, h is the Planck constant, ν is the optical frequency, and E g is the forbidden bandwidth of the material. The band gaps of TiO 2 and ZnTiO 3 /TiO 2 heterostructured photocatalysts were calculated as 3.2 and 2.7 eV, respectively.…”

Section: Resultsmentioning

confidence: 99%

Rational Construction of MOF-Derived Porous ZnTiO₃/TiO₂ Heterostructured Photocatalysts with Remarkable Photocatalytic Performance

Wei,

Huang,

Zhang

et al. 2023

ACS Omega

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TiO 2 has been widely used in photodegradation of pollutants, but it suffers from inferior photocatalytic performance under solar light illumination. Thus, novel porous ZnTiO 3 /TiO 2 heterostructured photocatalysts are constructed by hydrothermal and carbonization techniques using ZIF-8 as a sacrificial template. After coating with TiO 2 , ZIF-8 nanocubes are selectively etched and subsequently coprecipitated with Ti ions during the hydrothermal process. Thereafter, the pores generated from carbonized ZIF-8 provide a large specific surface area and abundant active reaction sites for photocatalysis after annealing, producing stable ZnTiO 3 /TiO 2 nanocomposites. Thus, porous ZnTiO 3 /TiO 2 heterostructured photocatalysts exhibit excellent photocatalytic performance under solar light irradiation due to the boosted electron−hole separation/transfer. The kinetic constant of ZnTiO 3 /TiO 2 nanocomposites (4.66 × 10 −1 min −1 ) is almost 100 and 3.7 times higher than that of selfdegradation (4.69 × 10 −3 min −1 ) and TiO 2 (1.27 × 10 −1 min −1 ), respectively. This facile strategy provides a deep insight into synthesizing heterostructured photocatalysts with high efficiency in the field of environmental remediation.

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Section: Resultsmentioning

confidence: 99%

Rational Construction of MOF-Derived Porous ZnTiO₃/TiO₂ Heterostructured Photocatalysts with Remarkable Photocatalytic Performance

Wei,

Huang,

Zhang

et al. 2023

ACS Omega

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“…methyl orange degradation 180 min, sonication [124] The piezoelectric mechanism can be improved by photocatalytic metal oxide ions and piezoelectric PVDF polymer composites. The electric field produced in hydrophobic PVDF films helps to improve the separation of the photoinduced carriers of metal oxide nanostructures [125]. The piezoelectric field generated in PVDF by mechanical action can improve the catalytic efficiency of photogenerated carriers.…”

Section: Energy-efficient β-Phase Enhancement In Pvdfmentioning

confidence: 99%

PVDF-Based Piezo-Catalytic Membranes—A Net-Zero Emission Approach towards Textile Wastewater Purification

Siddique,

Nawaz,

Razzaque

et al. 2024

Polymers

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Among the various water purification techniques, advancements in membrane technology, with better fabrication and analysis, are receiving the most research attention. The piezo-catalytic degradation of water pollutants is an emerging area of research in water purification technology. This review article focuses on piezoelectric polyvinylidene difluoride (PVDF) polymer-based membranes and their nanocomposites for textile wastewater remediation. At the beginning of this article, the classification of piezoelectric materials is discussed. Among the various membrane-forming polymers, PVDF is a piezoelectric polymer discussed in detail due to its exceptional piezoelectric properties. Polyvinylidene difluoride can show excellent piezoelectric properties in the beta phase. Therefore, various methods of β-phase enhancement within the PVDF polymer and various factors that have a critical impact on its piezo-catalytic activity are briefly explained. This review article also highlights the major aspects of piezoelectric membranes in the context of dye degradation and a net-zero approach. The β-phase of the PVDF piezoelectric material generates an electron–hole pair through external vibrations. The possibility of piezo-catalytic dye degradation via mechanical vibrations and the subsequent capture of the resulting CO2 and H2 gases open up the possibility of achieving the net-zero goal.

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1D/2D Electrospun Polyvinylidene Fluoride Nanofibers/Carbon Flakes Hybrid Nonmetal Polymeric Photo‐ and Piezocatalyst

Orudzhev,

Selimov,

Rabadanova

et al. 2023

ChemistrySelect

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Currently, one of the priority tasks is the development of intelligent materials that are sensitive to stimuli and can be used in catalytic applications for efficient decomposition of organic pollutants. Particularly relevant in this regard is the development of inexpensive non‐metallic hybrid polymer photocatalysts, and the explanation of the mechanism of using light energy in such systems is still the subject of open discussions. In this work, hybrid polymer fiber membranes based on polyvinylidene fluoride (PVDF) with graphite flakes were obtained by electrospinning. The morphology of the obtained samples was investigated using SEM microscopy methods, and their crystalline structure was analysed using XRD, Raman, and FTIR methods. Using RFE spectroscopy, it was shown that the addition of graphite leads to ion‐dipole interaction between the carbon surface and the polymer dipoles, changing the ratio of covalent and semi‐ionic bonds on the surface. The catalytic properties investigated during the decomposition of the organic dye methylene blue (MB) demonstrated high piezocatalytic activity of doped membranes and high photocatalytic activity of PVDF/C0.5. It was established that the photocatalytic activity is due to excitonic excitation.

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In situ growth of ZnO/Ag2O heterostructures on PVDF nanofibers as efficient visible-light-driven photocatalysts

Cited by 16 publications

References 47 publications

Rational Construction of MOF-Derived Porous ZnTiO₃/TiO₂ Heterostructured Photocatalysts with Remarkable Photocatalytic Performance

Rational Construction of MOF-Derived Porous ZnTiO₃/TiO₂ Heterostructured Photocatalysts with Remarkable Photocatalytic Performance

PVDF-Based Piezo-Catalytic Membranes—A Net-Zero Emission Approach towards Textile Wastewater Purification

1D/2D Electrospun Polyvinylidene Fluoride Nanofibers/Carbon Flakes Hybrid Nonmetal Polymeric Photo‐ and Piezocatalyst

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In situ growth of ZnO/Ag2O heterostructures on PVDF nanofibers as efficient visible-light-driven photocatalysts

Cited by 16 publications

References 47 publications

Rational Construction of MOF-Derived Porous ZnTiO3/TiO2 Heterostructured Photocatalysts with Remarkable Photocatalytic Performance

Rational Construction of MOF-Derived Porous ZnTiO3/TiO2 Heterostructured Photocatalysts with Remarkable Photocatalytic Performance

PVDF-Based Piezo-Catalytic Membranes—A Net-Zero Emission Approach towards Textile Wastewater Purification

1D/2D Electrospun Polyvinylidene Fluoride Nanofibers/Carbon Flakes Hybrid Nonmetal Polymeric Photo‐ and Piezocatalyst

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Rational Construction of MOF-Derived Porous ZnTiO₃/TiO₂ Heterostructured Photocatalysts with Remarkable Photocatalytic Performance

Rational Construction of MOF-Derived Porous ZnTiO₃/TiO₂ Heterostructured Photocatalysts with Remarkable Photocatalytic Performance