Ultrasound-assisted construction of a Z-scheme heterojunction with g-C3N4 nanosheets and flower-like Bi2WO6 microspheres and the photocatalytic activity in the coupling reaction between alcohols and amines under visible light irradiation

Yu, Xin; Hao, Xue-Li; Li, Haiying; Zhang, Zhiying; Wang, Yan; Li, Jingyi; Wang, Zhibao; Li, Enbo

doi:10.1016/j.mcat.2020.111122

Cited by 8 publications

(2 citation statements)

References 46 publications

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“…The peak at the lower angle (100) is ascribed to the periodic in-plane packing (with a distance of ca. 0.687 nm) of tri-s-triazine motifs in the aromatic systems [ 56 , 57 ], whereas the peak at the higher angle (002) to the periodic interlayer/facial stacking (with a distance of ca. 0.326 nm) of motifs existing in the conjugated aromatic systems, revealing the formation of the pronounced graphitic structure of g-C 3 N 4 [ 33 , 46 ].…”

Section: Resultsmentioning

confidence: 99%

Development of Sulfur-Doped Graphitic Carbon Nitride for Hydrogen Evolution under Visible-Light Irradiation

et al. 2022

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Developing eco-friendly strategies to produce green fuel has attracted continuous and extensive attention. In this study, a novel gas-templating method was developed to prepare 2D porous S-doped g-C3N4 photocatalyst through simultaneous pyrolysis of urea (main g-C3N4 precursor) and ammonium sulfate (sulfur source and structure promoter). Different content of ammonium sulfate was examined to find the optimal synthesis conditions and to investigate the property-governed activity. The physicochemical properties of the obtained photocatalysts were analyzed by X-ray diffraction (XRD), field emission-scanning electron microscopy (FE-SEM), scanning transmission electron microscopy (STEM), specific surface area (BET) measurement, ultraviolet-visible light diffuse reflectance spectroscopy (UV/vis DRS), X-ray photoelectron spectroscopy (XPS), photoluminescence (PL) spectroscopy and reversed double-beam photo-acoustic spectroscopy (RDB-PAS). The as-prepared S-doped g-C3N4 photocatalysts were applied for photocatalytic H2 evolution under vis irradiation. The condition-dependent activity was probed to achieve the best photocatalytic performance. It was demonstrated that ammonium sulfate played a crucial role to achieve concurrently 2D morphology, controlled nanostructure, and S-doping of g-C3N4 in a one-pot process. The 2D nanoporous S-doped g-C3N4 of crumpled lamellar-like structure with large specific surface area (73.8 m2 g−1) and improved electron−hole separation showed a remarkable H2 generation rate, which was almost one order in magnitude higher than that of pristine g-C3N4. It has been found that though all properties are crucial for the overall photocatalytic performance, efficient doping is probably a key factor for high photocatalytic activity. Moreover, the photocatalysts exhibit significant stability during recycling. Accordingly, a significant potential of S-doped g-C3N4 has been revealed for practical use under natural solar radiation.

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Section: Resultsmentioning

confidence: 99%

Development of Sulfur-Doped Graphitic Carbon Nitride for Hydrogen Evolution under Visible-Light Irradiation

et al. 2022

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“…[4][5][6] Among them, semiconductor photocatalysis technology has good application prospects: it is efficient, low-cost and environmentally friendly. [7] So far, many semiconductor materials have shown their excellent photodegradability, such as g-C 3 N 4 , [8][9][10] TiO 2 , [11][12][13] Bi 2 WO 6 , [14][15] MoO 3 , [16][17][18][19] Fe 2 O 3 [20][21][22] etc. Photocatalysts that can be stimulated by visible light, on the other hand, seldom have strong redox capacities.…”

Section: Introductionmentioning

confidence: 99%

Application of Z‐scheme Bi₂O₃‐Ag₃PO₄ Composite Photocatalyst in Degradation of Tetracycline and Methyl Orange

et al. 2022

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A new type of visible light Z‐scheme Bi2O3‐Ag3PO4 composite photocatalyst was created in this work using a simple in‐situ precipitation process. On this basis, the morphology, optical properties and electrochemical performance of the photocatalyst were studied by N2 adsorption‐desorption analysis and XRD, FT‐IR, XPS, SEM, TEM, UV‐vis DRS, PL, EIS, and other characterization methods. To further explore the photocatalytic performance of the composites, visible light degradation experiments were carried out on the antibiotic TC and the organic dyes MB and MO. The results show that the 0.025BA composite material exhibits higher photocatalytic performance than other comparative samples. In addition, the 0.025BA composite after five cycles of experiments also has a satisfactory photodegradation rate. The active species capture experiment and ESR showed that the active species h+, ⋅O2− are the main factors affecting the photocatalytic degradation, and ⋅OH played a minor role. The intermediates and possible decomposition pathways of TC were illustrated through LC–MS technology. Finally, the possible photocatalytic reaction mechanism was speculated. On the whole, the high photocatalytic activity of the 0.025BA composite is perhaps the result of the formation of its Z‐scheme heterojunction, which enables fast transfer and high separation of photogenerated carriers at the heterojunction interface, and also accelerates the rate of redox reactions on electron‐hole pairs.

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Synthesis of CoWO4/Bi2WO6 Z-type heterostructure with efficient photocatalytic performance

Chen

Zhang

et al. 2023

J Mater Sci: Mater Electron

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Ultrasound-assisted construction of a Z-scheme heterojunction with g-C3N4 nanosheets and flower-like Bi2WO6 microspheres and the photocatalytic activity in the coupling reaction between alcohols and amines under visible light irradiation

Cited by 8 publications

References 46 publications

Development of Sulfur-Doped Graphitic Carbon Nitride for Hydrogen Evolution under Visible-Light Irradiation

Development of Sulfur-Doped Graphitic Carbon Nitride for Hydrogen Evolution under Visible-Light Irradiation

Application of Z‐scheme Bi₂O₃‐Ag₃PO₄ Composite Photocatalyst in Degradation of Tetracycline and Methyl Orange

Synthesis of CoWO4/Bi2WO6 Z-type heterostructure with efficient photocatalytic performance

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Ultrasound-assisted construction of a Z-scheme heterojunction with g-C3N4 nanosheets and flower-like Bi2WO6 microspheres and the photocatalytic activity in the coupling reaction between alcohols and amines under visible light irradiation

Cited by 8 publications

References 46 publications

Development of Sulfur-Doped Graphitic Carbon Nitride for Hydrogen Evolution under Visible-Light Irradiation

Development of Sulfur-Doped Graphitic Carbon Nitride for Hydrogen Evolution under Visible-Light Irradiation

Application of Z‐scheme Bi2O3‐Ag3PO4 Composite Photocatalyst in Degradation of Tetracycline and Methyl Orange

Synthesis of CoWO4/Bi2WO6 Z-type heterostructure with efficient photocatalytic performance

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Application of Z‐scheme Bi₂O₃‐Ag₃PO₄ Composite Photocatalyst in Degradation of Tetracycline and Methyl Orange