0D/3D ZnIn2S4/Ag6Si2O7 nanocomposite with direct Z-scheme heterojunction for efficient photocatalytic H2 evolution under visible light

Kong, Dezhi; Ruan, Xinxing; Geng, Jiankun; Zhao, Yihan; Zhang, Dafeng; Pu, Xipeng; Yao, Shujuan; Su, Changhua

doi:10.1016/j.ijhydene.2021.06.053

Cited by 74 publications

(30 citation statements)

References 39 publications

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“…First, the photogenerated electrons are transferred from the valence band to the conduction band under visible light irradiation, with the h + created in the valence band. However, some of the electrons could recombine with the photogenerated holes . Second, H 2 O 2 and O 2 can capture the photogenerated electrons to form ·OH radicals and ·O 2 – radicals .…”

Section: Resultsmentioning

confidence: 99%

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Fabrication and Characterization of Co-Doped Fe₂O₃ Spindles for the Enhanced Photo-Fenton Catalytic Degradation of Tetracycline

Wang

Zhang

et al. 2021

ACS Omega

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Co-doped Fe 2 O 3 spindles with different Co contents were successfully fabricated by a facile one-step hydrothermal method. The crystalline structure, morphology, optical properties, and chemical state of the as-prepared catalysts before and after photo-Fenton reaction were characterized. Co 2+ incorporated into the Fe 2 O 3 lattice was confirmed by the above characterizations. Also, the photocatalytic and photo-Fenton catalytic performances of the samples were evaluated by the degradation of tetracycline (TC) under visible light irradiation in the absence/presence of H 2 O 2 . The results demonstrated that Co-doped Fe 2 O 3 spindles exhibited better catalytic degradation performance in comparison with single Fe 2 O 3 spindles, and the sample of Co(5%)-Fe 2 O 3 spindles displayed the highest activity and best stability. The improvement of photo-Fenton activity might be attributed to two reasons: On the one hand, Co-doped Fe 2 O 3 spindles not only formed the Fe vacancies to reduce the band gap but also could build up an internal electric field, which inhibits electron/hole pair recombination and facilitates the transfer of photoexcited charge carriers. On the other hand, the intrinsic Co 2+ /Co 3+ redox cycling can accelerate the circulation between Fe 2+ and Fe 3+ in Co(5%)-Fe 2 O 3 spindles to facilitate H 2 O 2 consumption and produce more ·OH radicals for TC degradation.

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Section: Resultsmentioning

confidence: 99%

“…However, some of the electrons could recombine with the photogenerated holes. 50 Second, H 2 O 2 and O 2 can capture the photogenerated electrons to form •OH radicals and •O 2 − radicals. 9 Simultaneously, the reduction of Fe 3+ to Fe 2+ can happen with the photogenerated electrons.…”

Section: Resultsmentioning

confidence: 99%

Fabrication and Characterization of Co-Doped Fe₂O₃ Spindles for the Enhanced Photo-Fenton Catalytic Degradation of Tetracycline

Wang

Zhang

et al. 2021

ACS Omega

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“…[41] As mentioned, in semiconductor-mediated photo-catalytic reactions, the production and separation of the photoinduced electron-hole pairs are important factors that determine the efficiency of a photocatalyst. [42][43][44] Under visible light irradiation, AVP is excited to produce photogenerated electrons and holes in conduction and valence bands, respectively. In general the holes react with water to produce hydroxyl radicals while photogenerated electrons react with dissolved oxygen to form superoxide radicals.…”

Section: Photocatalytic Activity Mechanismmentioning

confidence: 99%

Ag₂VO₂PO₄ Nanorods: Synthesis, Characterization, Photoactivity and Antibacterial activity

Vaishnavi

Venkataswamy

Angineni

et al. 2021

Zeitschrift anorg allge chemie

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Silver-containing materials have been the source of attraction due to their excellent optical and photocatalytic properties. Silver vanadium phosphate, Ag 2 VO 2 PO 4 , (hereafter abbreviated as AVP) in nanorods form was synthesized by hydrothermal method at 220 °C for 24 h and characterized by PXRD, FT-IR, 31 P MAS NMR, SEM-EDS, TEM-SAED, N 2 adsorption-desorption, UV-Vis DRS and XPS techniques. It was crystallized in the monoclinic crystal lattice with space group C2/m and the crystal structure consists of layers of edge-sharing VO 6 octahedra and PO 4 tetrahedra. The Ag 2 VO 2 PO 4 nanorods have shown the photocatalytic property against the degradation of Rhodamine B (RhB) dye. The degradation of RhB by AVP after 180 min of visible light irradiation was 45 %. The photocatalytic activity of this material was explained by its visible light absorption, which makes it a promising photocatalyst for use in solar photocatalysis and with a good photocatalytic rate. A mechanism for photodegradation of RhB dye was proposed based on scavenger experiments. It was noticed that * OH radicals are actively participating in the degradation of RhB followed by holes while the role of O 2 *À radicals is negligible. Antibacterial activity of this material was studied over gram-positive Staphylococcus aureus and gram-negative Pseudomonas aeruginosa bacteria.

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“…6 In general, the heterojunction formation between the nanoparticles helps to retain the redox potential of each catalyst and also helps to induce charge separation. 7 Moreover, the heterojunction can extend the light absorption range to some extent. 8,9 In particular, g-C 3 N 4 has been considered as an effective 2D visible-light photocatalyst due to its stable structure, facile preparation, unique electronic structure, and high specific surface area.…”

Section: Introductionmentioning

confidence: 99%

“…However, particle agglomeration due to the high surface energy of FeCo 2 O 4 intensely reduces its reactive sites and specific surface area. , To overcome this drawback, a heterojunction has been formed with FeCo 2 O 4 using carbon-based materials to enhance the photocatalytic activity . In general, the heterojunction formation between the nanoparticles helps to retain the redox potential of each catalyst and also helps to induce charge separation . Moreover, the heterojunction can extend the light absorption range to some extent. , In particular, g-C 3 N 4 has been considered as an effective 2D visible-light photocatalyst due to its stable structure, facile preparation, unique electronic structure, and high specific surface area.…”

Section: Introductionmentioning

confidence: 99%

Activation of Persulfate for Improved Naproxen Degradation Using FeCo₂O₄@g-C₃N₄ Heterojunction Photocatalysts

Palanivel¹,

Hossain

Macadangdang

et al. 2021

ACS Omega

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An effective heterojunction with robust charge separation and enormous degradation efficiency is the major task for photocatalyst preparation. In this study, we have prepared the FeCo 2 O 4 -loaded g-C 3 N 4 nanosheet by the sol–gel-assisted calcination method for photo-Fenton-like degradation under visible-light irradiation by activating persulfate. The nanocomposite exhibits a higher charge separation efficiency than pure g-C 3 N 4 and FeCo 2 O 4 for the degradation reaction against naproxen drugs. An effective interaction between the nanoparticles increases the degradation efficiency up to 91% with a synergistic index of 73.62%. Moreover, the nanocomposite exhibits a 78% mineralization efficiency against the naproxen pollutant under visible-light irradiation. For practical implementation, the degradation reaction was tested with various pH values, different water sources (DI, lake, and tap water), and light sources (LED (visible)/direct sunlight (UV–visible)). Moreover, the possible degradation mechanism predicted by the elemental trapping experiment and the recycling experiment clearly revealed that the heterojunction composite has a high enough degradation stability.

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0D/3D ZnIn2S4/Ag6Si2O7 nanocomposite with direct Z-scheme heterojunction for efficient photocatalytic H2 evolution under visible light

Cited by 74 publications

References 39 publications

Fabrication and Characterization of Co-Doped Fe₂O₃ Spindles for the Enhanced Photo-Fenton Catalytic Degradation of Tetracycline

Fabrication and Characterization of Co-Doped Fe₂O₃ Spindles for the Enhanced Photo-Fenton Catalytic Degradation of Tetracycline

Ag₂VO₂PO₄ Nanorods: Synthesis, Characterization, Photoactivity and Antibacterial activity

Activation of Persulfate for Improved Naproxen Degradation Using FeCo₂O₄@g-C₃N₄ Heterojunction Photocatalysts

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0D/3D ZnIn2S4/Ag6Si2O7 nanocomposite with direct Z-scheme heterojunction for efficient photocatalytic H2 evolution under visible light

Cited by 74 publications

References 39 publications

Fabrication and Characterization of Co-Doped Fe2O3 Spindles for the Enhanced Photo-Fenton Catalytic Degradation of Tetracycline

Fabrication and Characterization of Co-Doped Fe2O3 Spindles for the Enhanced Photo-Fenton Catalytic Degradation of Tetracycline

Ag2VO2PO4 Nanorods: Synthesis, Characterization, Photoactivity and Antibacterial activity

Activation of Persulfate for Improved Naproxen Degradation Using FeCo2O4@g-C3N4 Heterojunction Photocatalysts

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Fabrication and Characterization of Co-Doped Fe₂O₃ Spindles for the Enhanced Photo-Fenton Catalytic Degradation of Tetracycline

Fabrication and Characterization of Co-Doped Fe₂O₃ Spindles for the Enhanced Photo-Fenton Catalytic Degradation of Tetracycline

Ag₂VO₂PO₄ Nanorods: Synthesis, Characterization, Photoactivity and Antibacterial activity

Activation of Persulfate for Improved Naproxen Degradation Using FeCo₂O₄@g-C₃N₄ Heterojunction Photocatalysts