One-pot synthesis of C/Bi/Bi2O3 composite with enhanced photocatalytic activity

Hao, Qiang; Wang, Ruiting; Lü, Haojie; Xie, Ci’an; Ao, Weihua; Chen, Daimei; Ma, Chao; Yao, Wenqing; Zhu, Yongfa

doi:10.1016/j.apcatb.2017.07.030

Cited by 161 publications

(73 citation statements)

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“…When Ce‐doping reached 1.1 wt %, the photocurrent intensity decreased. Generally, the higher photocurrent intensity means higher separation efficiency of photo‐generated carriers, which is favorable for the enhancement of photocatalytic activity . It was noteworthy that 0.8Ce‐Bi 2 O 3 photocatalyst performed an enhanced transient photocurrent response with a photocurrent density of, which was nearly 4.2, 1.96, 1.52, and 1.19 folds higher than that of Bi 2 O 3 , 0.2Ce‐Bi 2 O 3, 0.5Ce‐Bi 2 O 3, and 1.1Ce‐Bi 2 O 3 samples, respectively.…”

Section: Resultsmentioning

confidence: 98%

Photocatalytic Activity of Bi₂O₃ Enhanced by the Addition of Ce³⁺/Ce⁴⁺ Synthesized by Ethylene Glycol‐assisted Solvothermal Method

Quan

Shi

et al. 2020

ChemistrySelect

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The photocatalysts Bi 2 O 3 :Ce 3 + /Ce 4 + (cerium content 0.2, 0.5, 0.8, and 1.1 wt. %) were prepared via one-pot ethylene glycolassisted solvothermal method. The prepared x Ce-Bi 2 O 3 (x = 0.5, 0.8, 1.1) samples present δ-Bi 2 O 3 phase with space group of Fm-3 m at room temperature, which indicates that the hightemperature cubic phase could be stabilized via Ce doping in Bi 2 O 3 lattices. Moreover, the addition of Ce 3 + /Ce 4 + could change the amount of oxygen vacancies (OVs) and adsorbed oxygen on the surface of photocatalysts. The existence of oxygen vacancies and adsorbed oxygen facilitated the generation of superoxide radicals () and hydroxide radicals (), which were the dominant reactive oxygen species for phenol degradation. The photocatalyst containing 0.8 wt. % cerium presented the highest photoactivity than the other synthesized samples. A photodegradation mechanism is proposed based on scavenger and electron spin resonance studies.[a] T.

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Section: Resultsmentioning

confidence: 98%

Photocatalytic Activity of Bi₂O₃ Enhanced by the Addition of Ce³⁺/Ce⁴⁺ Synthesized by Ethylene Glycol‐assisted Solvothermal Method

Quan

Shi

et al. 2020

ChemistrySelect

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“…4a, transient-photocurrent responses of as-prepared photocatalysts were measured under the light irradiation with intermittent on-off cycles to evaluate the production and migration of photogenerated carriers. The higher intensity of photocurrent, the stronger generating ability of photogenerated carriers [24,25]. The photocurrent density is higher in the light than that in the dark, and displays a typical on-off cycle mode.…”

Section: Resultsmentioning

confidence: 99%

Construction of ZnTiO3/Bi4NbO8Cl heterojunction with enhanced photocatalytic performance

Gao

2020

Nanoscale Res Lett

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Constructing heterojunction is an effective strategy to enhance photocatalytic performance of photocatalysts. Herein, we fabricated ZnTiO 3 /Bi 4 NbO 8 Cl heterojunction with improved performance via a typical mechanical mixing method. The rhodamine (RhB) degradation rate over heterojunction is higher than that of individual ZnTiO 3 or Bi 4 NbO 8 Cl under Xenon-arc lamp irradiation. Combining ZnTiO 3 with Bi 4 NbO 8 Cl can inhibit the recombination of photo-excited carriers. The improved quantum efficiency was demonstrated by transient-photocurrent responses (PC), electrochemical impedance spectroscopy (EIS), photoluminescence (PL) spectra, and time-resolved PL (TRPL) spectra. This research may be valuable for photocatalysts in the industrial application.

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“…[33][34][35][36] More importantly, Bi2O3 possess a band gap narrower than 2.8 eV, suggesting that it can be excited by visible light. 37 Bi2O3 can present in four phases including α, β, γ and δ phase.…”

Section: Introductionmentioning

confidence: 99%

Bi₂O₃@Carbon Nanocomposites for Solar-Driven Photocatalytic Degradation of Chlorophenols

Hao

Liu

Chen³

et al. 2019

ACS Appl. Nano Mater.

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Chlorophenols are corrosive and toxic in water environment, which have arisen increasing concerns and urge solar-driven technique with highly efficient photocatalysts for green remediation. Coupling photocatalysis with surface plasmon resonance (SPR) effect is a practical solution to boosting the utilization of solar light in the infrared region, meanwhile improving the overall performance of the photocatalysts. However, it is still lack of a facile and green strategy to synthesize metallic non-noble bismuth (Bi 0)-based photocatalysts. Herein, we report smart Bi/Bi2O3/C composites with high performance for photocatalytic degradation of 2,4-dichlorophenol. Advanced characterizations such as X-ray Diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS) and high-resolution transmission electron microscopy (HRTEM) are applied to analyze the morphology and structure of the prepared materials. The photodegradation rate of the hybrid is significantly enhanced compared with the sole counterparts, which is 1.60-fold of Bi2O3 and 2.47-fold of g-C3N4. The synthesized Bi/C-2 exhibits excellent stability without decline in activity after four cycles. The SPR effect of Bi is identified to account for the strengthen photo-reactivity. Moreover, the relatively high utilization efficiency of solar energy and rapid separating rate of photogenerated electron and hole pairs helped to enhance the photocatalytic performance synergistically.

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One-pot synthesis of C/Bi/Bi2O3 composite with enhanced photocatalytic activity

Cited by 161 publications

References 50 publications

Photocatalytic Activity of Bi₂O₃ Enhanced by the Addition of Ce³⁺/Ce⁴⁺ Synthesized by Ethylene Glycol‐assisted Solvothermal Method

Photocatalytic Activity of Bi₂O₃ Enhanced by the Addition of Ce³⁺/Ce⁴⁺ Synthesized by Ethylene Glycol‐assisted Solvothermal Method

Construction of ZnTiO3/Bi4NbO8Cl heterojunction with enhanced photocatalytic performance

Bi₂O₃@Carbon Nanocomposites for Solar-Driven Photocatalytic Degradation of Chlorophenols

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One-pot synthesis of C/Bi/Bi2O3 composite with enhanced photocatalytic activity

Cited by 161 publications

References 50 publications

Photocatalytic Activity of Bi2O3 Enhanced by the Addition of Ce3+/Ce4+ Synthesized by Ethylene Glycol‐assisted Solvothermal Method

Photocatalytic Activity of Bi2O3 Enhanced by the Addition of Ce3+/Ce4+ Synthesized by Ethylene Glycol‐assisted Solvothermal Method

Construction of ZnTiO3/Bi4NbO8Cl heterojunction with enhanced photocatalytic performance

Bi2O3@Carbon Nanocomposites for Solar-Driven Photocatalytic Degradation of Chlorophenols

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Photocatalytic Activity of Bi₂O₃ Enhanced by the Addition of Ce³⁺/Ce⁴⁺ Synthesized by Ethylene Glycol‐assisted Solvothermal Method

Photocatalytic Activity of Bi₂O₃ Enhanced by the Addition of Ce³⁺/Ce⁴⁺ Synthesized by Ethylene Glycol‐assisted Solvothermal Method

Bi₂O₃@Carbon Nanocomposites for Solar-Driven Photocatalytic Degradation of Chlorophenols