Synthesis and characterization of type-II p(CuxSey)/n(g-C3N4) heterojunction with enhanced visible-light photocatalytic performance for degradation of dye pollutants

Nouri, Morteza; Zare-Dehnavi, Nasser; Jamali‐Sheini, Farid; Yousefi, Ramin

doi:10.1016/j.colsurfa.2020.124656

Cited by 44 publications

(11 citation statements)

References 39 publications

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“…Figure 9 shows the effect of Pt nanoparticles on the electron–hole recombination of the HER devices that could be obtained from the Bode EIS plot [ 44 ]. The electron lifetime ( ) can be estimated using the frequency at the middle frequency peak (1–100 Hz) in the Bode phase plot from the following equation [ 45 ] Based on the Bode plot (Fig.…”

Section: Resultsmentioning

confidence: 99%

Molybdenum Disulfide Nanosheets Decorated with Platinum Nanoparticle as a High Active Electrocatalyst in Hydrogen Evolution Reaction

et al. 2022

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Electrochemical hydrogen evolution reaction (HER) refers to the process of generating hydrogen by splitting water molecules with applied external voltage on the active catalysts. HER reaction in the acidic medium can be studied by different mechanisms such as Volmer reaction (adsorption), Heyrovsky reaction (electrochemical desorption) or Tafel reaction (recombination). In this paper, facile hydrothermal methods are utilized to synthesis a high-performance metal-inorganic composite electrocatalyst, consisting of platinum nanoparticles (Pt) and molybdenum disulfide nanosheets (MoS2) with different platinum loading. The as-synthesized composite is further used as an electrocatalyst for HER. The as-synthesized Pt/Mo-90-modified glassy carbon electrode shows the best electrocatalytic performance than pure MoS2 nanosheets. It exhibits Pt-like performance with the lowest Tafel slope of 41 mV dec−1 and superior electrocatalytic stability in an acidic medium. According to this, the HER mechanism is related to the Volmer-Heyrovsky mechanism, where hydrogen adsorption and desorption occur in the two-step process. According to electrochemical impedance spectroscopy analysis, the presence of Pt nanoparticles enhanced the HER performance of the MoS2 nanosheets because of the increased number of charge carriers transport.

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Section: Resultsmentioning

confidence: 99%

Molybdenum Disulfide Nanosheets Decorated with Platinum Nanoparticle as a High Active Electrocatalyst in Hydrogen Evolution Reaction

et al. 2022

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“…These results were in agreement with the analysis of the transient photocurrent response. Moreover, the Bode phase plot was employed to investigate the photogenerated electron life (τ r ), which can be calculated by the following equation: τ r = 1/(2πf peak ) 49,50 . In particular, the frequency range of f peak was located at 1–100 Hz.…”

Section: Resultsmentioning

confidence: 99%

“…Moreover, the Bode phase plot was employed to investigate the photogenerated electron life (τ r ), which can be calculated by the following equation: τ r = 1/(2πf peak ). 49,50 In particular, the frequency range of f peak was located at 1-100 Hz. Notedly, τ r is inversely proportional to f peak according to the above equation.…”

Section: The Photoelectrochemical Properties Of Samplesmentioning

confidence: 97%

Designing effective and stable S‐scheme RGO/AgVO₃/AgBr hybrid with enhanced photocatalytic performance

et al. 2021

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The low separation of photogenerated electron-hole pairs and cycle stability has been the main bottleneck which restricts the development of photocatalytic technology for water purification. Here, RGO/AgVO 3 composites were fabricated by photoultrasonic assisted reduction method, and AgBr nanoparticles were assembled on the surface of RGO/AgVO 3 via an in situ ion exchange method. A series of characterization and experimental results indicated that the introduction of RGO influenced the growth of crystal phase for AgVO 3 nanorods, resulting that AgVO 3 nanorods became thicker and shorter with the increase in RGO content. Moreover, RGO could also work as a bridge to promote the migration of electrons, leading different improvement for photocatalytic activity. Furthermore, in situ growth of AgBr on the surface of AgVO 3 nanorods could prevent its agglomeration and exfoliation, thus improving the photocatalytic activity and cycle stability of composites. RGO 1% /AgVO 3 /AgBr 30% exhibited excellent photocatalytic activity and stability for methylene blue (MB) degradation due to its unique structure, and its removal ratio reached at 96.2% within 50 min. Meanwhile, the separation of photogenerated electron-hole pairs of AgVO 3 was markedly improved due to the introduction of RGO and AgBr. Based on the trapping experiments and theoretical calculation of band gap, a possible S-scheme photocatalytic mechanism for improved photocatalytic activity was proposed.

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“…Combined with the band gap values extrapolated by UV-vis spectra, the VB values of g-C 3 N 4 was found to be +1.47 eV (vs.NHE). 49,50 In order to further investigate the separation and transfer efficiency of photogenerated carriers, the PL spectra were obtained under 355 nm excitation. As shown in Fig.…”

Section: Photoelectrochemical Performance Analysismentioning

confidence: 99%

Biomass porous carbon as the active site to enhance photodegradation of oxytetracycline on mesoporous g-C₃N₄

et al. 2022

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Synthesis and characterization of type-II p(CuxSey)/n(g-C3N4) heterojunction with enhanced visible-light photocatalytic performance for degradation of dye pollutants

Cited by 44 publications

References 39 publications

Molybdenum Disulfide Nanosheets Decorated with Platinum Nanoparticle as a High Active Electrocatalyst in Hydrogen Evolution Reaction

Molybdenum Disulfide Nanosheets Decorated with Platinum Nanoparticle as a High Active Electrocatalyst in Hydrogen Evolution Reaction

Designing effective and stable S‐scheme RGO/AgVO₃/AgBr hybrid with enhanced photocatalytic performance

Biomass porous carbon as the active site to enhance photodegradation of oxytetracycline on mesoporous g-C₃N₄

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Synthesis and characterization of type-II p(CuxSey)/n(g-C3N4) heterojunction with enhanced visible-light photocatalytic performance for degradation of dye pollutants

Cited by 44 publications

References 39 publications

Molybdenum Disulfide Nanosheets Decorated with Platinum Nanoparticle as a High Active Electrocatalyst in Hydrogen Evolution Reaction

Molybdenum Disulfide Nanosheets Decorated with Platinum Nanoparticle as a High Active Electrocatalyst in Hydrogen Evolution Reaction

Designing effective and stable S‐scheme RGO/AgVO3/AgBr hybrid with enhanced photocatalytic performance

Biomass porous carbon as the active site to enhance photodegradation of oxytetracycline on mesoporous g-C3N4

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Resources

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Designing effective and stable S‐scheme RGO/AgVO₃/AgBr hybrid with enhanced photocatalytic performance

Biomass porous carbon as the active site to enhance photodegradation of oxytetracycline on mesoporous g-C₃N₄