Accelerated photocatalytic oxidation of carbamazepine by a novel 3D hierarchical protonated g-C3N4/BiOBr heterojunction: Performance and mechanism

Yang, Liwei; Liang, Lanlan; Wang, Lijun; Zhu, Jianchao; Gao, Shengwang; Xia, Xunfeng

doi:10.1016/j.apsusc.2018.12.180

Cited by 129 publications

(18 citation statements)

References 62 publications

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“…The open crystalline structure has a layered Sillen-Aurivillius related oxide structure composed of [Bi 2 O 2 ] layers sandwiched between two slabs of [X] ions, and the electrostatic potential difference between the slabs generates a static internal electric field (IEF). The static IEF in BiOX can effectively split and transit the photogenerated electrons and holes [61][62][63]. However, BiOX as a photocatalyst could be employed for the degradation of organic pollutants alone as its positive CB (conduction band) potential restricts it from being used for other photocatalytic applications such as H 2 generation, CO 2 reduction, N 2 fixation and organic synthesis.…”

Section: Electronic Band Structure Of Biox Bi X O Y X Z and G-c 3 Nmentioning

confidence: 99%

“…In a typical process, pre-synthesized g-C 3 N 4 was protonated by treating it with HCl solution for converting its surface charge from negative to positive. The protonated g-C 3 N 4 was then added to KBr solution such that the Br − gets attracted to its surface and subsequently undergoes a precipitation reaction to form BiOBr with the addition of Bi(NO 3 ) 3 •5H 2 O solution [62]. Therefore, the BiOBr layer was favourably formed on the positively charged surface of g-C 3 N 4 and led to the formation of a tightly bound 2D-2D semiconductor heterojunction.…”

Section: In Situ Self-assemblymentioning

confidence: 99%

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Advanced Two-Dimensional Heterojunction Photocatalysts of Stoichiometric and Non-Stoichiometric Bismuth Oxyhalides with Graphitic Carbon Nitride for Sustainable Energy and Environmental Applications

et al. 2021

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Semiconductor-based photocatalysis has been identified as an encouraging approach for solving the two main challenging problems, viz., remedying our polluted environment and the generation of sustainable chemical energy. Stoichiometric and non-stoichiometric bismuth oxyhalides (BiOX and BixOyXz where X = Cl, Br, and I) are a relatively new class of semiconductors that have attracted considerable interest for photocatalysis applications due to attributes, viz., high stability, suitable band structure, modifiable energy bandgap and two-dimensional layered structure capable of generating an internal electric field. Recently, the construction of heterojunction photocatalysts, especially 2D/2D systems, has convincingly drawn momentous attention practicably owing to the productive influence of having two dissimilar layered semiconductors in face-to-face contact with each other. This review has systematically summarized the recent progress on the 2D/2D heterojunction constructed between BiOX/BixOyXz with graphitic carbon nitride (g-C3N4). The band structure of individual components, various fabrication methods, different strategies developed for improving the photocatalytic performance and their applications in the degradation of various organic contaminants, hydrogen (H2) evolution, carbon dioxide (CO2) reduction, nitrogen (N2) fixation and the organic synthesis of clean chemicals are summarized. The perspectives and plausible opportunities for developing high performance BiOX/BixOyXz-g-C3N4 heterojunction photocatalysts are also discussed.

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Section: Electronic Band Structure Of Biox Bi X O Y X Z and G-c 3 Nmentioning

confidence: 99%

Section: In Situ Self-assemblymentioning

confidence: 99%

Advanced Two-Dimensional Heterojunction Photocatalysts of Stoichiometric and Non-Stoichiometric Bismuth Oxyhalides with Graphitic Carbon Nitride for Sustainable Energy and Environmental Applications

et al. 2021

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“…The N 1s spectra (Fig. 4(c)) exhibits three peaks at 404.31, 399.9 and 398.36 eV, where 398.36 eV corresponded to the nitrogen atoms in the triazine rings (C-N=C), peaks at 399.9 eV and 404.31 eV are related to N-(C) 3 and (C) 2 -N-H, respectively [12]. In Figure 4(d), the O1s spectrum is located on two peaks at 529.5 eV and 531.1 eV.…”

Section: Xpsmentioning

confidence: 99%

One-step hydrothermal synthesis of g-C₃N₄/TiO₂/BiOBr layered hybrid photocatalyst with enhanced visible light degradation of tetracycline

Zang

et al. 2021

E3S Web Conf.

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In this work, a ternary composite photocatalyst with layer structure was synthesized by a one-step hydrothermal method. The visible-light-driven layered ternary photocatalyst exhibited excellent photocatalytic performance for the degradation of tetracycline (TC). The degradation rate of TC reached 88.78% within 60 min under visible light exposure in presence of optimum ratio G-T-B-0.2, which is higher than pure g-C3N4, TiO2 and BiOBr. Scaning electron microscope (SEM), Transmission electron microscope (TEM), Xray diffractometer (XRD), Fourier transform infrared spectra (FTIR), spectrometer and X-ray photoelectron spectroscopy (XPS) were used to character the physicochemical properties of the synthesized samples. Photoelectrochemical measurements and radical trapping experiments revealed that the improvement of photocatalytic performance was mainly attributed to the rapid charge transfer at the interface of gC3N4/TiO2/BiOBr, which was benefit to the separation of photogenerated carriers and visible light absorption. This work provides a facile method for the synthesis of ternary heterojunctions, which has potential applications in environmental remediation.

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“…The electron spin resonance (ESR) measurements of the P-2 filaments were conducted at ambient temperature on a Bruker A 300 apparatus using 5,5-dimethyl-1-pyrroline n-oxide (DMPO) and 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) as the spin trapping reagents for the detection of both hydroxyl (•OH) in water and superoxide (•O 2 − ) in methanol dispersions [50] as well as for characterization of holes (h + ) in water dispersion [51], respectively. A 300W Xenon lamp was employed as the light source and a visible light (400-780 nm) bandpass filter was applied to shield the UV rays.…”

Section: Characterization Techniquesmentioning

confidence: 99%

Enhanced Photocatalytic Properties of PET Filaments Coated with Ag-N Co-Doped TiO2 Nanoparticles Sensitized with Disperse Blue Dyes

et al. 2020

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In this study, the effects of disperse blue dye-sensitization on the photocatalytic properties of the Ag-N co-doped TiO2 nanoparticles loaded on polyethylene terephthalate (PET) filaments are investigated under visible light irradiation. The microstructure and photocatalytic properties of the as-synthesized TiO2 nanocomposites, as well as the as-prepared PET filaments, are systematically characterized. The photocatalytic performance of the PET filaments coated with the Ag-N co-doped TiO2 nanoparticles sensitized with disperse blue dyes is evaluated via its capacity of photo-degrading methyl orange (MO) dyes under visible light irradiation. It is found that the holes are the predominant reactive radical species and the hydroxyl and superoxide radicals play a subordinate role in the photocatalytic reaction process. The reaction rate constant of the photocatalytic composite filaments is nearly 4.0 times higher than that of the PET filaments loaded solely with TiO2 nanoparticles. The resultant photocatalytic composite filaments are evident to be capable of repeatedly photo-degrading MO dyes without losing its photocatalytic activity significantly.

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Accelerated photocatalytic oxidation of carbamazepine by a novel 3D hierarchical protonated g-C3N4/BiOBr heterojunction: Performance and mechanism

Cited by 129 publications

References 62 publications

Advanced Two-Dimensional Heterojunction Photocatalysts of Stoichiometric and Non-Stoichiometric Bismuth Oxyhalides with Graphitic Carbon Nitride for Sustainable Energy and Environmental Applications

Advanced Two-Dimensional Heterojunction Photocatalysts of Stoichiometric and Non-Stoichiometric Bismuth Oxyhalides with Graphitic Carbon Nitride for Sustainable Energy and Environmental Applications

One-step hydrothermal synthesis of g-C₃N₄/TiO₂/BiOBr layered hybrid photocatalyst with enhanced visible light degradation of tetracycline

Enhanced Photocatalytic Properties of PET Filaments Coated with Ag-N Co-Doped TiO2 Nanoparticles Sensitized with Disperse Blue Dyes

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Accelerated photocatalytic oxidation of carbamazepine by a novel 3D hierarchical protonated g-C3N4/BiOBr heterojunction: Performance and mechanism

Cited by 129 publications

References 62 publications

Advanced Two-Dimensional Heterojunction Photocatalysts of Stoichiometric and Non-Stoichiometric Bismuth Oxyhalides with Graphitic Carbon Nitride for Sustainable Energy and Environmental Applications

Advanced Two-Dimensional Heterojunction Photocatalysts of Stoichiometric and Non-Stoichiometric Bismuth Oxyhalides with Graphitic Carbon Nitride for Sustainable Energy and Environmental Applications

One-step hydrothermal synthesis of g-C3N4/TiO2/BiOBr layered hybrid photocatalyst with enhanced visible light degradation of tetracycline

Enhanced Photocatalytic Properties of PET Filaments Coated with Ag-N Co-Doped TiO2 Nanoparticles Sensitized with Disperse Blue Dyes

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One-step hydrothermal synthesis of g-C₃N₄/TiO₂/BiOBr layered hybrid photocatalyst with enhanced visible light degradation of tetracycline