Rapid and Scalable Fabrication of TiO2@g-C3N4 Heterojunction for Highly Efficient Photocatalytic NO Removal under Visible Light

Pham, Minh-Thuan; Luu, Hong Quang; Nguyen, Truc-Mai Thi; Tran, Hong‐Huy; You, Sheng‐Jie; Wang, Ya-Fen

doi:10.4209/aaqr.210276

Cited by 17 publications

(13 citation statements)

References 18 publications

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“…Through intermediate reactions, the •O2 produced the hydroperoxyl radical (•HO2), then the •HO2 could produce the •OH. Finally, the •O2 and •OH radicals degraded NO to generate NO2 and other nitrogen pieces (Pham et al, 2021a).…”

Section: Resultsmentioning

confidence: 99%

“…The flow rate of the experiment was 1.5 L min -1 , and the humidity was around 50%. Based on the photocatalytic system design (Pham et al, 2021a(Pham et al, , 2022, the humidity is strongly connecting to via control of the flow rate, which means that the humidity of 50% at the flow rate 1.5 L min -1 . The 100 ppm of NO gas (N2 balanced, Ming Yang Co) was diluted with zero air ( Model 1001, Sabio Instruments) until it reached 500 ppb.…”

Section: The Photocatalytic Experimentsmentioning

confidence: 99%

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Photoredox-Catalyzed Decomposition of Nitric Oxide over Au-Enhanced Surface Plasmon Resonance ZnSn(OH)6 Microcubes

Pham

Nguyen²,

You³

et al. 2023

Aerosol Air Qual. Res.

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Air pollution is one of the most concerning issues today because of its adverse effects on living organisms and the environment. Therein, nitric oxide (NO) is the leading cause of the greenhouse effect, acid rain, and respiratory diseases. Therefore, discovering a low-cost, environmentally friendly, highly efficient photocatalysis technique to remove NO is necessary and urgent. In this work, the ZnSn(OH)6 microcubes (cZHS) catalyst was decorated with golden nanoparticles (Au:cZHS) to enhance the photoredox-catalyzed degradation of NO under solar light by surface plasmon resonance (SPR). This work demonstrated the contribution of SPR to the photoredox performance of the ZHS. Herein, the photoredox efficiency of the cZHS increased dramatically under the effecting of SPR from the golden nanoparticles, the photoredox efficiency of the Au:cZHS reached 75%, about four times higher than that of cZHS. In addition, the generation of other nitrogen species, nitrogen dioxide (NO2) conversion, and the reusability of the materials are calculated and discussed carefully by theory and experiment. On the other hand, the contribution and lifespan of radicals are also investigated clearly with trapping experiments and time-dependent electron spin resonance (ESR). This study provided the reader with a clear understanding of the SPR effect on the photocatalytic performance of cZHS, which may be necessary for future related studies.

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Section: Resultsmentioning

confidence: 99%

Section: The Photocatalytic Experimentsmentioning

confidence: 99%

Photoredox-Catalyzed Decomposition of Nitric Oxide over Au-Enhanced Surface Plasmon Resonance ZnSn(OH)6 Microcubes

Pham

Nguyen²,

You³

et al. 2023

Aerosol Air Qual. Res.

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“…The AQE results show ( Figure 2b ) that photons are most efficient in 3% MgO@g-C 3 N 4 . The heterojunction structure has enhanced the photocatalytic activities of the materials [ 44 ]. In addition, the photocatalytic reusability of 3% MgO@g-C 3 N 4 was shown by a five-cycle recycling test under identical experimental conditions ( Figure 2c ).…”

Section: Resultsmentioning

confidence: 99%

Rapid fabrication of MgO@g-C₃N₄ heterojunctions for photocatalytic nitric oxide removal

Pham¹,

Tran²,

Bui³

et al. 2022

Beilstein J. Nanotechnol.

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Nitric oxide (NO) is an air pollutant impacting the environment, human health, and other biotas. Among the technologies to treat NO pollution, photocatalytic oxidation under visible light is considered an effective means. This study describes photocatalytic oxidation to degrade NO under visible light with the support of a photocatalyst. MgO@g-C3N4 heterojunction photocatalysts were synthesized by one-step pyrolysis of MgO and urea at 550 °C for two hours. The photocatalytic NO removal efficiency of the MgO@g-C3N4 heterojunctions was significantly improved and reached a maximum value of 75.4% under visible light irradiation. Differential reflectance spectroscopy (DRS) was used to determine the optical properties and bandgap energies of the material. The bandgap of the material decreases with increasing amounts of MgO. The photoluminescence spectra indicate that the recombination of electron–hole pairs is hindered by doping MgO onto g-C3N4. Also, NO conversion, DeNOx index, apparent quantum efficiency, trapping tests, and electron spin resonance measurements were carried out to understand the photocatalytic mechanism of the materials. The high reusability of the MgO@g-C3N4 heterojunction was shown by a five-cycle recycling test. This study provides a simple way to synthesize photocatalytic heterojunction materials with high reusability and the potential of heterojunction photocatalysts in the field of environmental remediation.

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“…This parallel recombination route minimizes the possibility of photoexcited charge participating in the photocatalytic reaction, hence excessive Pt concentrations may impair the effectiveness of photocatalytic degradation [47]. The Recyclability and durability of photocatalyst are crucial considerations in determining the catalyst's practical use and scalability [48,49]. The photocatalyst was separated by centrifugation without washing after each run for recyclability runs, the fade degraded MB supernatant was removed as well as a new MB solution was added.…”

Section: Photodegradation Of Organic Compounds Under Visiblelight Irr...mentioning

confidence: 99%

The highly stable construction of Pt/FeVO4 heterostructure with improving photocatalytic performance and growth mechanism for •O2 and •OH production based on Electron Spin Resonance study

Sajid

Zhai

Alomayri

et al. 2023

Preprint

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We prepared a unique platinum doped iron vanadate (Pt/FeVO4) composite for escalating the photocatalytic performance via the facile hydrothermal method using iron nitrate (Fe(NO3)3.9H2O), Ammonia metavanadate (NH4VO3) and chloroplatinic acid (H2PtCl6), as major precursors. Characterization results revealed that the FeVO4 and well dispersed platinum Pt/FeVO4 are in the range of around 150 nm to 200 nm size, which developed transportations of the photo-generated electron into FeVO4, consequently efficient separation of the photo-generated carrier in coupled Pt/FeVO4 nanocomposites heterostructure. The multi characterizations result indicated that excellent adsorption abilities of Pt/FeVO4 composites were strongly associated with Pt doping. The induce impedance spectroscopy and Photoluminance results demonstrated that Pt enhances separations efficiency as well as transferring rates for photo-generated charge. The EPR data suggest that reactive oxygen species (OH•, h+, •O2) were the most important factors in methylene blue (MB) degradation. As a result, Pt/FeVO4 exhibits the greater photocatalytic ability to degradations for MB dye for visible light irradiation compared to pure FeVO4.

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Rapid and Scalable Fabrication of TiO2@g-C3N4 Heterojunction for Highly Efficient Photocatalytic NO Removal under Visible Light

Cited by 17 publications

References 18 publications

Photoredox-Catalyzed Decomposition of Nitric Oxide over Au-Enhanced Surface Plasmon Resonance ZnSn(OH)6 Microcubes

Photoredox-Catalyzed Decomposition of Nitric Oxide over Au-Enhanced Surface Plasmon Resonance ZnSn(OH)6 Microcubes

Rapid fabrication of MgO@g-C₃N₄ heterojunctions for photocatalytic nitric oxide removal

The highly stable construction of Pt/FeVO4 heterostructure with improving photocatalytic performance and growth mechanism for •O2 and •OH production based on Electron Spin Resonance study

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Rapid and Scalable Fabrication of TiO2@g-C3N4 Heterojunction for Highly Efficient Photocatalytic NO Removal under Visible Light

Cited by 17 publications

References 18 publications

Photoredox-Catalyzed Decomposition of Nitric Oxide over Au-Enhanced Surface Plasmon Resonance ZnSn(OH)6 Microcubes

Photoredox-Catalyzed Decomposition of Nitric Oxide over Au-Enhanced Surface Plasmon Resonance ZnSn(OH)6 Microcubes

Rapid fabrication of MgO@g-C3N4 heterojunctions for photocatalytic nitric oxide removal

The highly stable construction of Pt/FeVO4 heterostructure with improving photocatalytic performance and growth mechanism for •O2 and •OH production based on Electron Spin Resonance study

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Rapid fabrication of MgO@g-C₃N₄ heterojunctions for photocatalytic nitric oxide removal