Construction of fixed Z-scheme Ag|AgBr/Ag/TiO2 photocatalyst composite film for malachite green degradation with simultaneous hydrogen production

Liu, Jize; Liu, Zhiyu; Piao, Congcong; Li, Shuguang; Tang, Jianhe; Fang, Dawei; Zhang, Zhaohong; Wang, Jun

doi:10.1016/j.jpowsour.2020.228430

Cited by 62 publications

(16 citation statements)

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“…The shoulder around 531.4 eV has been assigned to O 2− ions in the oxygen-deficient regions, as previously referenced in the literature [ 36 , 37 ]. Figure 5 C shows the transitions corresponding to Ag3d, with peaks at 374 and 368 eV, and a characteristic spin-orbit splitting of 6.0 eV, which have been clearly assigned to metallic Ag [ 36 , 37 ]. In the case of the 10%Ag@ZnONWs catalyst, the result obtained was also as expected.…”

Section: Resultsmentioning

confidence: 89%

“…327, 378, 437, and 1050 cm −1 [ 35 ]. The 1150 cm −1 band, observed in both the commercial catalyst ( Figure 4 C,e) and the as-synthesized ZnO NWs ( Figure 4 D,g), has been attributed to overtones and/or combination bands [ 36 ]. The narrow strong band at 437 cm −1 was assigned to the E 2 modes, involving mainly Zn motion, corresponding to the band characteristic of the wurtzite phase [ 34 ].…”

Section: Resultsmentioning

confidence: 99%

“…The narrow strong band at 437 cm −1 was assigned to the E 2 modes, involving mainly Zn motion, corresponding to the band characteristic of the wurtzite phase [ 34 ]. The band at 378 cm −1 was ascribed to the A 1T mode, indicating some degree of structural disorder in the ZnO lattice [ 36 ]. No bands associated with Ag NPs were detected in 10%Ag@ZnO commercial ( Figure 4 C,f), 10%ZnO NWs ( Figure 4 D,h), or in catalysts with lower percentages of silver.…”

Section: Resultsmentioning

confidence: 99%

“…Figure 5 A shows the transitions corresponding to Ti2p of the 10%Ag@TiO 2 NW catalyst. The peaks observed at 464.5 and 458.8 eV have been unambiguously assigned to Ti 4+ , typical of rutile TiO 2 , as identified by XRD [ 36 , 37 ]. In this catalyst, the O1s clearly shows two components at 530.1 and 531.4 eV.…”

Section: Resultsmentioning

confidence: 99%

“…In the case of the 10%Ag@ZnONWs catalyst, the result obtained was also as expected. Figure 5 D shows a peak at 1022.1 eV, corresponding to the Zn 2p 3/2 transition, which has been assigned to Zn 2+ in ZnO [ 36 , 37 ]. As was the case with the rutile-based catalyst, the peak corresponding to the O1s transition also shows two components: a main component at 530.1 eV, assigned to oxygen in Zn-O bonds, and a shoulder at ca.…”

Section: Resultsmentioning

confidence: 99%

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Photocatalytic Activity of Silver-Based Biomimetics Composites

et al. 2021

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Different Ag@TiO2 and Ag@ZnO catalysts, with nanowire (NW) structure, were synthesized containing different amounts of silver loading (1, 3, 5, and 10 wt.%) and characterized by FE-SEM, HRTEM, BET, XRD, Raman, XPS, and UV–vis. The photocatalytic activity of the composites was studied by the production of hydrogen via water splitting under UV–vis light and the degradation of the antibiotic ciprofloxacin. The maximum hydrogen production of all the silver-based catalysts was obtained with a silver loading of 10 wt.% under irradiation at 500 nm. Moreover, 10%Ag@TiO2 NWs was the catalyst with the highest activity in the hydrogen production reaction (1119 µmol/hg), being 18 times greater than the amount obtained with the pristine TiO2 NW catalyst. The most dramatic difference in hydrogen production was obtained with 10%Ag@TiO2-P25, 635 µmol/hg, being 36 times greater than the amount reported for the unmodified TiO2-P25 (18 µmol/hg). The enhancement of the catalytic activity is attributed to a synergism between the silver nanoparticles incorporated and the high surface area of the composites. In the case of the degradation of ciprofloxacin, all the silver-based catalysts degraded more than 70% of the antibiotic in 60 min. The catalyst that exhibited the best result was 3%Ag@ZnO commercial, with 99.72% of degradation. The control experiments and stability tests showed that photocatalysis was the route of degradation and the selected silver-based catalysts were stable after seven cycles, with less than 1% loss of efficiency per cycle. These results suggest that the catalysts could be employed in additional cycles without the need to be resynthesized, thus reducing remediation costs.

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Section: Resultsmentioning

confidence: 89%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Photocatalytic Activity of Silver-Based Biomimetics Composites

et al. 2021

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Construction of Dual‐tight Contact Interface in Z‐scheme System of In₂O₃/O_V/In₂S₃ for Enhancing Photocatalytic Performance

Wang

Zhang

et al. 2021

ChemCatChem

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The novel Z‐scheme photocatalytic system of In2O3/OV/In2S3 has been obtained by a facile two‐step in situ deposition method, where oxygen vacancies and In2S3 are in situ located on the surface of In2O3 in sequence. In such a photocatalytic system, oxygen vacancy anchored tightly on the surface of In2O3 serves as an electron mediator, efficiently extracting electrons from In2O3 and modulating the electron transfer paths to facilize constructing a Z‐scheme system. Due to the presence of another tight contact interface between the In2O3 and In2S3, the transfer rate of electrons from In2O3 to In2S3 can be further accelerated. Therefore, the synergistic effect of the above‐mentioned dual‐tight contact interface over In2O3/OV/In2S3 Z‐scheme system simultaneously enhances the charge separation and transfer, resulting in the high performance of photocatalytic H2 evolution.

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Recent Developments in Immobilized Photocatalyst for Hydrogen Production

Wang,

Luo,

et al. 2024

ChemCatChem

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Solar‐driven water splitting for hydrogen production has emerged as one of the most promising methods for addressing environmental and energy crises. The utilization of immobilized photocatalyst for hydrogen production has attracted significant attention in recent years due to its excellent stability, high photocatalytic efficiency, and ease of recovery and reuse. Hence, a comprehensive review of the development of immobilized photocatalyst appears exceedingly significant. Herein, we initially analyze the advantages of the immobilized photocatalytic system in aspects such as light absorption, photon utilization, and charge separation. Subsequently, we introduce various assembly techniques for immobilized photocatalyst and elaborate on some representative characteristics of this immobilized system. Furthermore, we cite the examples of the application of immobilized photocatalyst in large‐scale hydrogen production to envision its future prospects. Finally, we discuss the remaining issues in this field and outline future directions of development and challenges therein. This review holds great promise for prompting the advancement of immobilized photocatalyst in the field of photocatalysis.

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Construction of fixed Z-scheme Ag|AgBr/Ag/TiO2 photocatalyst composite film for malachite green degradation with simultaneous hydrogen production

Cited by 62 publications

References 50 publications

Photocatalytic Activity of Silver-Based Biomimetics Composites

Photocatalytic Activity of Silver-Based Biomimetics Composites

Construction of Dual‐tight Contact Interface in Z‐scheme System of In₂O₃/O_V/In₂S₃ for Enhancing Photocatalytic Performance

Recent Developments in Immobilized Photocatalyst for Hydrogen Production

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Construction of fixed Z-scheme Ag|AgBr/Ag/TiO2 photocatalyst composite film for malachite green degradation with simultaneous hydrogen production

Cited by 62 publications

References 50 publications

Photocatalytic Activity of Silver-Based Biomimetics Composites

Photocatalytic Activity of Silver-Based Biomimetics Composites

Construction of Dual‐tight Contact Interface in Z‐scheme System of In2O3/OV/In2S3 for Enhancing Photocatalytic Performance

Recent Developments in Immobilized Photocatalyst for Hydrogen Production

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Construction of Dual‐tight Contact Interface in Z‐scheme System of In₂O₃/O_V/In₂S₃ for Enhancing Photocatalytic Performance