Construction of novel ternary component photocatalyst Sr0.25H1.5Ta2O6·H2O coupled with g-C3N4 and Ag toward efficient visible light photocatalytic activity for environmental remediation

Xin, Xin; Lang, Junyu; Wang, Tingting; Su, Yiguo; Zhao, Yanxia; Wang, Xiaojing

doi:10.1016/j.apcatb.2015.07.052

Cited by 66 publications

(22 citation statements)

References 74 publications

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“…Foremost, the integration of metallic Ag species strengthens the visible-light scattering and harvesting ability in visible-light region, favoring the generation of more electron-hole pairs for oxidative degradations. Second, the Ag nanoparticles are able to role as electron sinks to promote the efficient separation of produced charge carriers [34,35]. A suitable amount of Ag deposits facilitates the migration and transfer of excited electrons from the conduction band of semiconductor to metallic sites through the Schottky barrier generated at the metal-semiconductor interface.…”

Section: Fig 3 Sem Images Of Composites Ab0 (A) and Ab4(b) And Thementioning

confidence: 99%

Ag/Bi12O17Cl2 composite: A case study of visible-light-driven plasmonic photocatalyst

Chang

Wang

Luo

et al. 2017

Molecular Catalysis

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a b s t r a c tIn this investigation, novel Ag/Bi 12 O 17 Cl 2 plasmonic composites with different Ag contents were constructed through a solvothermal and subsequent photoreduction route and fully characterized by a collection of analytical techniques. Spectroscopic results confirmed the presence and uniform dispersion of Ag nanoparticles on the 2D nanosheets of Bi 12 O 17 Cl 2 . The Ag content in composites exerted considerable influence on the extension of light-adsorption range and the enlargement of specific surface areas. The photocatalytic abilities of these Ag/Bi 12 O 17 Cl 2 composites were evaluated toward the degradation of rhodamine B (RhB) and 2,4-dichlorophenol (2,4-DCP) under the visible-light irradiation. The results demonstrated that the Ag/Bi 12 O 17 Cl 2 composites showed much higher photocatalytic efficiencies than that of pure Bi 12 O 17 Cl 2 , especially the sample with an optimal Ag content showing the best photocatalytic behavior among all tested samples. The remarkable enhancement of Ag/Bi 12 O 17 Cl 2 photocatalytic efficiency could be mainly attributed to the efficient charge separation that was induced by the localized surface plasmon resonance effect of metallic Ag, strong visible-light adsorption and the favorable morphology with enlarged specific surface areas. Eventually, the photocatalysis mechanism over Ag/Bi 12 O 17 Cl 2 composites was preliminarily proposed on the base of reactive species trapping experiments.

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Section: Fig 3 Sem Images Of Composites Ab0 (A) and Ab4(b) And Thementioning

confidence: 99%

Ag/Bi12O17Cl2 composite: A case study of visible-light-driven plasmonic photocatalyst

Chang

Wang

Luo

et al. 2017

Molecular Catalysis

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“…where E VB and E CB stand for the conduction band and valence band edge potential respectively, c is the absolute electronegativity of the semiconductor, which is the geometric mean of the electronegativities of the constituent atoms, 56 and E c is the energy of free electrons on the hydrogen scale (about 4.5 eV vs. NHE), 57 Eg is the band gap of semiconductor. The c value is calculated to be 5.92 eV for Ag 3 PO 4 and 5.47 eV for CoFe 2 O 4 , respectively.…”

mentioning

confidence: 99%

Ag₃PO₄/CoFe₂O₄ magnetic nanocomposite: synthesis, characterization and applications in catalytic reduction of nitrophenols and sunlight-assisted photocatalytic degradation of organic dye pollutants

2017

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) radicals were the main reactive species for dye degradation in the present sonocatalytic system. A proposed mechanism for the enhanced photocatalytic activity is also discussed based on the experimental results. In addition, the catalytic activity of the nanocomposite in the reduction of nitrophenols by using NaBH 4 was evaluated. The results showed that Ag 3 PO 4 /CoFe 2 O 4 exhibited the best performance in the reduction of 4-nitrophenol (4-NP) and 2-nitrophenol (2-NP) and revealed 100% conversion into the corresponding amino derivatives within 24-46 min with rate constant equal to 0.0714 min À1 and 0.0329 min À1, respectively.Moreover, due to the existence of the CoFe 2 O 4 , the Ag 3 PO 4 /CoFe 2 O 4 nanocomposite could be magnetically separated from the reaction mixture and reused without any change in structure.

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“…The loading of Ag nanoparticles on the as‐prepared composite materials is carried out by the photodeposition method. This method of loading of the plasmonic and nanosized Ag onto g‐C 3 N 4 by photodeposition is an established technique . For a low level (∼2 %) of silver loading on g‐C 3 N 4 via the photodeposition method, the obtained nanoparticle size was ∼10 nm.…”

Section: Methodsmentioning

confidence: 99%

Ag decorated G‐C₃N₄/black titanium oxides composite for the destruction of environmental pollutant under solar irradiation

Masih

Rohani

2019

Can J Chem Eng

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Research on the synthesis of advanced composite materials is an important area of research on the visible-active photodegradation of environmental pollutants. Novel hybridized structures of graphitic carbon nitride (g-C 3 N 4 ) are synthesized by a facile one-step in-situ method. Black titanium oxides, TiO, Ti 2 O 3 , a mixture of TiO + Ti 2 O 3 , and a reference material, white TiO 2 P25, are used for the synthesis of the hybridized g-C 3 N 4 and further decorated with Ag nanoparticles. Physicochemical and optical properties of the obtained materials are characterized by various techniques. XRD patterns revealed that the structural regularity of g-C 3 N 4 and titanium oxide(s) is maintained in the composites. However, the main diffraction peak for g-C 3 N 4 is prominently shifted to a lower 2-theta along with a decrease in the intensity, indicating the formation of g-C 3 N 4 nanosheet heterojunction. Vibrational spectra of the composites showed signature IR peaks for g-C 3 N 4 and demonstrated an enhancement in the vibrations after modifications, and further supported the XRD results. A distinct red-shift in the optical spectra of g-C 3 N 4 upon modifications with black titanium oxide(s) demonstrated an enhanced absorbance of visible light, yet on the contrast white TiO 2 P25 showed a blue-shift. Under the experimental conditions of simulated solar light, pristine g-C 3 N 4 , and its composites g-C 3 N 4 /TiO and g-C 3 N 4 / Ti 2 O 3 showed moderate activity for the photodegradation of an organic pollutant, rhodamine B. Interestingly, a synergistic enhancement in the photoactivity is demonstrated by the g-C 3 N 4 modified with a mixture of black titanium oxides (g-C 3 N 4 /TiO + Ti 2 O 3 ). On the other hand, the composite synthesized by a post-synthesis method is found less effective in photodegradation reaction.

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Construction of novel ternary component photocatalyst Sr0.25H1.5Ta2O6·H2O coupled with g-C3N4 and Ag toward efficient visible light photocatalytic activity for environmental remediation

Cited by 66 publications

References 74 publications

Ag/Bi12O17Cl2 composite: A case study of visible-light-driven plasmonic photocatalyst

Ag/Bi12O17Cl2 composite: A case study of visible-light-driven plasmonic photocatalyst

Ag₃PO₄/CoFe₂O₄ magnetic nanocomposite: synthesis, characterization and applications in catalytic reduction of nitrophenols and sunlight-assisted photocatalytic degradation of organic dye pollutants

Ag decorated G‐C₃N₄/black titanium oxides composite for the destruction of environmental pollutant under solar irradiation

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Construction of novel ternary component photocatalyst Sr0.25H1.5Ta2O6·H2O coupled with g-C3N4 and Ag toward efficient visible light photocatalytic activity for environmental remediation

Cited by 66 publications

References 74 publications

Ag/Bi12O17Cl2 composite: A case study of visible-light-driven plasmonic photocatalyst

Ag/Bi12O17Cl2 composite: A case study of visible-light-driven plasmonic photocatalyst

Ag3PO4/CoFe2O4 magnetic nanocomposite: synthesis, characterization and applications in catalytic reduction of nitrophenols and sunlight-assisted photocatalytic degradation of organic dye pollutants

Ag decorated G‐C3N4/black titanium oxides composite for the destruction of environmental pollutant under solar irradiation

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Product

Resources

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Ag₃PO₄/CoFe₂O₄ magnetic nanocomposite: synthesis, characterization and applications in catalytic reduction of nitrophenols and sunlight-assisted photocatalytic degradation of organic dye pollutants

Ag decorated G‐C₃N₄/black titanium oxides composite for the destruction of environmental pollutant under solar irradiation